BE742945A - Scintillating compns and nuclear radiation detection - method - Google Patents

Scintillating compns and nuclear radiation detection - method

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Publication number
BE742945A
BE742945A BE742945DA BE742945A BE 742945 A BE742945 A BE 742945A BE 742945D A BE742945D A BE 742945DA BE 742945 A BE742945 A BE 742945A
Authority
BE
Belgium
Prior art keywords
scintillator
chosen
nuclear radiation
denotes
composition
Prior art date
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French (fr)
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Publication of BE742945A publication Critical patent/BE742945A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01TMEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16Measuring radiation intensity
    • G01T1/20Measuring radiation intensity with scintillation detectors
    • G01T1/204Measuring radiation intensity with scintillation detectors the detector being a liquid
    • G01T1/2042Composition for liquid scintillation systems
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01TMEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16Measuring radiation intensity
    • G01T1/20Measuring radiation intensity with scintillation detectors
    • G01T1/203Measuring radiation intensity with scintillation detectors the detector being made of plastics

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Abstract

Compositions contain a stilbene deriv. of formula I (where R is alkyl aryl alkylaryl, or arylalkyl; m is 0-4; n is 0-5; p is 0 or 1; Z is a group of formula (II) or (III); and when Z has formula III, p is 0) (I) is pref. 4,41-di(5,7-di-t-pentylbenzoxazol -2-yl)-stilbene, or 1,4,5-triphenyl-2 (p-stilbenyl)imidazole, (I) present in a mass proportion of 5 x 10-5 to 1 x 10-1.

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 



  Nouvelles c3.sitioR5 de 1tl11turs et nouveau procède de dt.e<:ti.'.sa es rgù1atlons nucléaires. 
 EMI1.2 
 ivexticn esncers.e 4e soM-ellas aonj'siti'as do sci:3t!lLmt#.ii+n as -9.iti xïJ.#Zß de-- -les 3';T&t'ix sc" FiLlat> rs à la. d4t rctlon eù au .iw:.,fi.ûq. 3i'G rzidlat4iir.,z n.ào14aîx-eJ* t'es applieltlrjràz 4s ;,,,3. la dév-ctîen et a,,% >1.;sàg; de la rldioaettvité presnoset-s 'â.'s.3' s.n Plus 'n-3p'3rt<ssce. C"*s*e- asx;, par exe=ple utllisç- dos c.pteurs 1 ici;+1.llatears p>nr étaàie# 1 aetion biochiatque et '1'!ii$eâs<''sa=.2 ' le "e:p'%:.' 6$ T'Wis'e''2: oruâlîqaene le tr-74jet de c-psës nùtritli= aaùiti;>nn;ls e de de- -3î'oise.me<! daas les p3,M!3 p?ur tD'.^vs",,s'rE ' 

 <Desc/Clms Page number 2> 

 
 EMI2.1 
 la. ci=capicn de fluides -.a4, "'=.â3 .-t3<.

   L.5 L. üji. scct '.15'3F de.ü$ un ". "w'...m. tras inpartant "!a..::s 7..9. recherche 'i 3.°'ksw.s,.i '. en ..,e=" S m On entend, d'une ràrièz e gén6ral!!", r;fU. :S'J:J:\:Lllateul"s 
 EMI2.2 
 des produits qui é=etter !e 1.a#-iére p.ar fl#ttr4as>J>n=e qaaxd ils scn-S z==zJ#io à une énergie ayaat sc.s *rigi:n* ;;1s 1I:.e -?iwce àe #adìaXivitÔ. ± yeui déceler 'st #ù5#p<;7 1-ss l.x.ir3 ---- lulx.x'j 3-3 les Eoirtà.llJtt ns .s =-à;¯iin ds ùà"=.

    tr:=m..3 et de c-:?H?3 a>rrs-riÉ3* 122 pr"céds s'.a3.2 c ù.;::=jztr.¯ge çar - . - - , - - , ¯ , , , . ; - i ..: -- .,; ; ; .., . - .-= .-; : g .., liqui- 4* soit 'î x-*iàùi.l,1.fitéiir é  miliot; jsàa:#x<#1%#1.ùw ±K±1.5 1:ce i"z".3##iiz# #J  ', la .=sitios uia coEpresa 122?±]Îé:I.É µ.9i" llil-#,3É'?Qif à i J Y = 1;5 -S.3X.B <11 li q > 1 d ?. o# rG ini qix* g *3 a±- 1s ;. 2 0e >¯=?# à > # . #; C'3 ,i.=j"ii...e *#"¯.> :; .i<ie sx-'.'R .¯, - iy.a.,.w - ",1:,;:: ..: .-.4' -- ?cYy<* 1::èÁl! <=,j*;:1%.a.à pi.3ati" u-à -I3SJ 1>Jqual le z:eià ;=.i.-l.,z.M,#.#r st '?N ..#<;.i#a#1.r7# 1;.:ii.àe. Ls<ï -Eosiis 12?.3.i- ,4<tz ..1?..ii 3.J.1 .3;.ix c'ils eKt2.B3'et #>à"%-Ieiit '2 'scE.s'&itus..S'j ìlp=p  .ér;iilt;ai#.s,B te13 qu.a .i? :5c.1.x#.r;ts auà:1 3.iair?; p des z-érà.tx"iz# .J-.f."-t 1s sol>;.bifl-it<Ey de.s x:1*  *tc:. 



  3BX-J-..SOH? ,la scsss Ô3>glilàgl125 li)"".à ÔLI#Î..:iT2i17 fllls#  r3st g n '¯;;#=.#5.##.3w 31 31..ijna;>f GÙe#z21#.e a;=== i#.;t- e-Ji=ii 1.ir;5c qat 1,à#il*'1 t?.T.à Y'2± ie illzwltéGc>OE:n<#Q E- ±Î.±;ÌTGz?, F lT.'É?Il' s :Ôozlé?l±*r,2".éiÉ à'Ô±Z ' 2a 5Çéoo'%X"?I ssia F3. 1,±.2 " à35±2 [Jfi."JÉI,ïlkl%1= pliea.i.a=irs d'e'1J appareils ds'Secrs 3 ;03.-=z jÉ.=;5iaZJ#z=nt u. ? i l i- ± é = , J % au.# t;;

   J q.i "#ñz.5 s flsc.'-jp .,"=- i.r =j :r2 J ùg"fitbJ? 313 4'.Mettra ''4 îmxi#=e d* longae:#w ri ào.oepiti.'à.la :;z-.#* 

 <Desc/Clms Page number 3> 

 
 EMI3.1 
 ""'I!" ¯¯¯¯ ... ' tuez uffiseen' aoublas les déùoc@p$ ,uU1ileSi .J18 sont pas suffisaient solubles pour produira. 'manière Utile des émissions lumineuses déce- ',Ub1... ,j). ,;. ta 'ComPosés fluorescents sont I( tJ} :v.. '.1" y' ,:çy.¯ ; ¯...;=, . inutilî 4,bléw-dwn- dès .con4t:t1ons. économiques ou bien présen- ;'. t't "a.it*:ti18'\eu.vent1l par exemple.- mal 4>- produire,]. 1:Ierer' 4'!t. à J8,rtir d'un sqiv=t parti- "cu1ier. 1^. dene ,t'(e qu*on a besoin de pouvoir cli,pe-" -ker de .G1;.ttmit$une lumière -de longueur -: . 



  ' d'onde O"....-n't..ux ""t.e\iX"8 dont on dispose et qui ne pré- , .en'tent J*,if"J..nc..ment;'Onné8 ci-dessus." ... 



  , :;'.:; J'T'-s 13Q'rl0liy que Cë3''Elh cola- .,oN .....';J, .r/"";"" .;: ... <;t......t. , j;. ¯ .i:* ,..r, ."" . - " -L'. 1<'"';'fP:" ",' ",.,f ".A,":t.r;\J.f.' "11.' 'f. . - poaé. 9'. ¯f:..ilae3axrs exegtirxue.e i>' " ...!.; .;tr'1j"v>' t ..:;.:-; ,v ':; 'i 0-.-- ,.- t. .ant - .. ,.,e, ';OD8 t"ormé&8. !..c.s scintil-. {..!;t ';'7¯,', / .:..... "".0,¯ .').'Ú ,r;, -if A 'i'r.é".y .;"". , e-: ,$<,., onganique au dans une bzz 1uë ire exrmement .satis-',: ..1J'':-7 . pp ,'fiYSha.e "'' } # y w-.r:."^sf ^ ,j ' .-''?" .8i". ^a''B'[.E i* doser des radiations ùucléa1r.8,-', 1 Â''' s rc. .w^= i '# ' t '' ' X . ; =1g,'< p 'u' F4v ' am ement8 bit., gamma. et Xz ':.,j:f  1" ' , ; ':'"J";"*, >g "- . '< .(..:....;.. ;"',"..\.;" <t ,r , . .. . .-., "..¯enIOD' pour-objet une ' ">,,,!',;

   .' .\, ". ' ,,:'.''';'' ;;tt:. , ',<,-$" 'ii"< . .... ,.., >'cppo8if.,e.,SC1n±;iaur:tt'nl.é-e doua scintil1ateur. pré- sent da ïl,4, atimntt . donner une r épouse décelable ':.8OWI '".t#:''t Xà4±àtiçç nuc1é.aire1l dissous -dans un mt-:.::'.. 



  ''it.u $1)):''':''..:, " , '. éboisi dans le groupe -formé par les ¯- ? sl' ,x: "1 "iqtaso.ideg raxspreû, .. ^,. 



  (\ 'C't;' , ';:.ti'nt!11Art.ur coe.poncÍ A 1- -for- '; ),, -," ..t..'1, - -. 1:!', ,.;¯..."-,,,,,,-* ...,j.;.....: .. ".';': 
 EMI3.2 
 " mal* géàµjà>N<îl3" " " ji':.#io'Jf¯ ' *.... ; a- J . .R-:n'Tc f j"GS ",w1-"'F iw " .a1" , ...: .. .1 . P :i&", ' .."". -1!...' .,' ;.' -t ¯ 
 EMI3.3 
 HSW<<<- 'M-T""'''<?9' Yr"e'E'4'.s â'sr "*'* "''j., ôù,,1i,4lts- grOuPè,Jβ4ro-"rbOné. choisi 1 &J'OUpe8 <; "':' ... ,"'t">²""'"  1  ? , yyI, ¯ .s..: vtr joz ",..t !" 

 <Desc/Clms Page number 4> 

 
 EMI4.1 
 à: .w Fï . i i.6 p d M àa' A.'9w i-y. 3F i Î p :d16 j.ûw .i. a 1"i e3t un entier entre zéro et TM, :bi4aFi.3SeJ aPAZ'wi.'aüRS,f[ja iF es,- ur. 



  114F â eo-rpria a.3 entre tel '1e .'I d! c13:*, 'i17it>;J .il1'kY#âl7Lfi p un aniiér ù,i3isi .e;2;e érs gt un ot z in 
 EMI4.2 
 "!t{...","1 cho1 31 ç'trxi <,"wi,.' â-.,Fi NWJs ;f dlô iorm.à.is3 (1) jt (1 #à ( ) ,...... ' ' i qz '"#;< {,l, 'J-.-N , .:'.,o;." f"#4 - i --"" :1""'- J ?' :;,e" µ'ô ; as ,!.rlj; t-,-- &.1. 
 EMI4.3 
 



  -!'"':: ' f8 (,1.µ1 ,1 ;à; ;'!; m ..'i-.7 1;*'% "-\,."-¯..,-:;-'<\.,,,. -'t:! .:"i-¯"';;;'''Jft ;1 "': - ± 1 1 =t/, tl 1 ; , ; >' '1 -µ * .? i . L 5.i;= 1.ùU Î ii r ¯ ¯¯¯  R ' : 5 2,1 ;t.i< Q ,> ' . b' 5 ',-{' r\ â 'fr i f Îl" ''Î vr 'r:-" :. ','.....¯ f>'.Ta. ;12 ':.:'!::-1.\''..: via h .,.. ÎéÎ' t-1-Y ÀK ':3L r;,,': .2::: :"'.:-2T'.'-: 1:1f-:: -lI* - ',3- .a,..e '"-/..Îk &1, 1?F * 1'-7, ,:1=1 :g z0 G .::! 'r %4 jY (=1> -1=l'ù " o , ...... te..:-. - ' o -t .." ,"'..:; ':::-=':'- .: ,'I- .101- % - & ' . ¯ "';-,.,;: ' ¯ - 'f 5 , 1 < . ± 4 -.', é ..a é 0 " jJ' fl "'-: .-;. - : = s . ." .. - > 6 -: ,." - ',t .a - , A. , , 'o .¯1 . -<."'",'" .,;- v':$ j 9' ....- /Q.¯ , ¯ ¯ . ¯ z ¯ . 



  .< i h 2 1 1 1" ¯ 1J - ¯ ' :/ .'t: 1" t 7 ¯ - ¯ '"'!: : "1f "t :-, ... -I!' "':.: ,....-: .. ,'. '" -' #..- . ¯ , . : , 8 is'¯ -.............. -....' :<1;- ..."'  - z.aT 1#1 ,.t, T'...r4:-:'\ >t ¯ 12:? ± âi 11.-i t....,.; 

 <Desc/Clms Page number 5> 

 
 EMI5.1 
 radicaux dérivés du benzoxazole aai3ia'b.ea, suivant 1 in- vention, eo3K:w scintillateur3 sent lea composas suivants: 4)4'-i-(b.nzoxazol--yl)8t11bne, 4,4'-ài-(5,7-di-éthyl- .-2 .i,lre, 4,4'-=ài(5,7-di-tert-pentylbenzo- xs:so!-'-y3jstilbaet 4,4'-.-à6-hex.bencxl-.yl)      
 EMI5.2 
 9ilna, 4g4'-âi-(5.?-tri-hylenzoxazol-2-yl)tilbne, ; 4,4'(.6,7,tr: :hi.a:ol--2-yl)atilbn, ,- 'x 3 '"-i'-P= ßâ;3yrnoxa. ol-2-.;, ril?ae, 4,4'-di- (5s:âr;,w'W.S:iZ:La'"..l-2-yl).ti...'a7"iLSp 3,3'-di#àEthyl-4,4'dii,ß ..r:y:':';:iitan, 3.

   J'-diphê:1yl- ,," ..-µß.'.>eri i,'sj, :, s.t."ßl3.i .', âta.:. #.:;  '=..'dsi ' <.I"'h"."'" 3',â:- T : s,-â'.- .F.U. -9 f;"r.''.±Fô!3 3': :t .,=y.F'3.,.a' .û.sl l'ixvextion, .').:,:: .1'3 cy-scgôs  :'Fr. $f$gx45'';;;': ;,yl-2-('-tilny. )ir:4xz*1->. ",5-âri-(ës3s;'3hi%¯>'.i,'-'!p-tlbényl) ilri- .::g3:y ,s gai"'sk.'ue'.;'wy2x:eiiF;a'.sa ..rx.! i.A..i-"..cl, F"#F' é6t rit.aj- i' â%, ,r^' :.e'i..n,a"s''â.3'l.'.,.lâ.j'.$,.;....-AÉr.J, 
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 -< ? ." , ' à' . * É n iÉ ' À L i À "ùà -Î,i ( j. =I à). ÉÎ: '1 1 /,É Î 1 1 b 1 3ilà À P , !S "",,, ..â ' .. f;;.,.e-e3.'r a"- T,''¯i i..W6.,.e"5i:¯¯ ¯ ¯¯ ,¯, ,-< Yy..$l i>xi.5l: " ..- .. x' a  à '3,-#:¯ ,,. .. x.1 r.' .. :::1,. . .#.r, 

 <Desc/Clms Page number 6> 

 
Les composés utilisés, suivant l'invention, comme scintillateurs, peuvent se préparer par tout procédé connu.

   Par exemple, on peut préparer les scintillateurs contenant un noyau benzoxazole suivant le procédé décrit au brevet belge   641.426.   On peut préparer les acintillateurs contenant un noyau imidazole comme décrit par Gunther Drefahl et   Reins   Herma dans : Chem-Berichte,   Volune     93,   pages 486 à 492 (1960). 



   Les   exemples   suivants   illuatrent   la préparation des composés utilisés comme   ocintillateurs,   suivant l'invention. 
 EMI6.1 
 



  EXEItPL± 1 - Priparaticn de 4'-dibenzox-2-Yl) stilbene On chauffe à reflux pendant deux   heures une   solution 
 EMI6.2 
 de 1,5 g de 4,41-di(chlorocarbonyl)stilbbre dans 50 ml de dioxanne avec une solution de 1,1 g d'orthoaminophénol dans 5 ml de dioxanne. On refroidit, la solution et en la filtre ; on recueille sur le filtre   1,8   g de 4,4'-bis(c- 
 EMI6.3 
 h1droxyph4nylcrbamyl)atilbène. On chauffe ce produit sous vide au bain d'huile à 320 C- 340 C; on le refroidit et on l'épuise avec du   benzène   dans un extinoveur de Soxhlet. 
 EMI6.4 
 On obtient 0.93 g d3 4,4'-di{tefizoxazolZ-yl)-st11bne sous   for=e   d'un produit jaune fondant entre 365 C et 368 C. 

 <Desc/Clms Page number 7> 

 



   EXEMPLE 2 - Préparation du1,4,5-triphényl-2-(p-sitlbény1)- imidazole - 
On fait réagir 1,04 g de formyl-stilbène avec 1,05 de tenzile et 1,08 g d'acétate d'ammonium dans 50 ml d'acide acétique cristallisable. On chauffe à reflux pendant 1 h 30 m on dilue à l'eau et on rend basique avec de l'amoniaque. On recueille le produit attendu par filtration. Le rendement est de 80%. Ce produit fond de 242 C à 244 C. 



   Les solvants liquidas auxquels on ajoute les scintil- lateurs pour   forcer   les compositions de   scintillateurs     suivit   l'invention sont bien   connus   des techniciens des scintilla-   teurs.   Cn peut par exemple, utiliser des   solvants   transpa- rente tels que des hydrocarbures ou des éthers. des sélanges 
 EMI7.1 
 binaires tels que des KélRnges ,1'&leE,ùla ut ..t'hydrcoybures et d'éthers ou d'hydrocarbures et d'esters. Comme exemples de tels solvants, on peut citer les   suivants :  teluène. 
 EMI7.2 
 xylène, t=1<thà+lbenzéne, dioxanne, p-cyméne, anisole, sycichexane, heptane, 1,2-din±tbcxyéthztù;a, tol&ne-tthand tol1.fme-tht!no 1 ethanol-xylnc-dticxanse nnp*r4tal*-rc-di.ox,,Irre, naphtalene-phoï-phate tributylique, etc.. 



  On rrérire Its conpositions liquides de scintillâtes, par simple addition du ecintÀ411&attur au sol-eant, 9 agitatie. jusqu'à octention d'une so"&utlkor. hf?'cg&3e. Ça peut utilizer direeterent 1% ccmçciiàisn liquide- : on p-?'tt ausii çr4parér une solution cvncentrè qu'on diluera au Tcr:ent ùe l'enploi. 



  Les plastiques 1.4t11isa'bles pc:.!" t'orm=r lés c&pcsitica 

 <Desc/Clms Page number 8> 

 
 EMI8.1 
 solides de 81\i2:5ers 8 4le=et  ieü Qrus des spi- -?i&list@s. Ce sent des :..ûi. $âa '.n$'fo'iE"3 ;ôâ trassp&ytes, par exemple des L,.â'i .s t&r':9?l&Rtiq'.<es eis qe 1< polyatt-yrêne. le8 polT%ltc171ates, lfacé:. de 3,.f3, le pol7Yin71tolu:e. les.p9ly&=:de, les pclycarho'mtes, le poljlue chlorure de pol7Yiny ttc.. Cn peu': "3;.'"'r:ei"".3' ai! $ i:'t.I.f.lB*E3' à la =tièr-0 p:a8iqu. qu'-elle est & 1*41 fC3.iu, Vzr exemple. au ect-râ dlute O.'r3:'..ZI  ,'.8 :'.s';;-.ât',J" Gti de ecu'4ee* ÇA peut aussi &<sl:er 1< -2 c-i n - W.v 4-s e; CR <:&t&ysey. i sÉi-! aiâ.V 4e tar..4a.J'ßdlriY'iu t W#'t.a:'.-k L. 4 -=.%re en un pcl'y:::re S.,.Cf.9.t.=,i Ot"'t:3.f::':p-i'.i d:'8 lésa*! le s':ointi11a.te!Jr se truV8 i3isor'.

   Ji3prs; La . é.p.rm,'''ww=. et ls raF"sv.s3.'.â.a: j9 i:m,r'.'xf r va. ur. ...-.-, du 9c< è1"'e 4t1:1s. r::1 caz, .3 il"il:3fJçr %t '8 c::;1iic3 ply*r:x&ti;. pyeK*C!<.'5 -lit ' s.... r gy- y' . 4 or,. 



  "'t':s n.;"-;t"'...a.1j4 {"¯""4.ii.\..t sst -':!-"'Ig}:" (":I.1;o -'tll-r'l"'--¯:fI',.,,'".-C3i--...'.J ""l""""tr"l'-J-"'."--:1o chan.3i, 
 EMI8.2 
 .a r¯:;:::;'"\;:l!;:..t('40 <'!tt:: n '.3' :::,''-::4 ,,!wl('.;.3 13 j 1 \:-';.,)H:'rJ. i1"-;:..;<1 J.1 ..".i".. ' 1>: ,1",-:1:'t 'i,.g=1';±* ?..; i7!' Z.3 1 1. à rE , ''''4c 7 ..,:": 2 ± ? ' f 1 .1. 1>' 1 1 ' .>z" M =1 ' > ±" 1 1 .; Ji:lf iJ? É- i':"r. 's'.t:.-'.x ix... :? i: e'?'-""*..'.".'.r''..':" y.,.ï.:i ,...;.. '"1' ... > , r..., : a : ;y. "- !?3c., ..,as ... s. . ¯ ¯., iri"" ,,.4#s. fi:..,d  ' ;:è iô âa " # ¯ " = ; .. i J 3':' - :.'''<-,':' ::..-::.." --; :::-..:; t:tL :..;:... : ,,f'1<.v--.Íl:r.,..'" "t.......,;.-", < .. a . : Y ¯ b ,.-d " -- 1l-"':'i"'"'''' =¯x ¯ . ¯ ' -u...ü, , ¯-,., :.t'11:. y 1,. :<.

    !,."- "-":'-:;;:1 -';.:.#':-'..T/ 4 ""-",::,: # E.,',! <--!r1i'4",,''Yo;'''J//!Jf-'t''I' :1...",-, r, 3T-.r";''.-. :'.3'* "-*"? t ' .,. ..R "'3ir 1t''Jt.i... $<,*0 41' h  '=5" 2 .'; *jl2 r - a 'sm k';,z' :^-LI:.''.z? . 



  'l4""""':t; ..² - .;;r> 5. >± . 5* i> *  . 



  1 3  P Iî " ; 

 <Desc/Clms Page number 9> 

 Si on le désire, on   peu'-    aux compositions 
 EMI9.1 
 Sj.iv&E/t i.tinver-t,4-or. des a1iii8 variÉe ..co""m6=e'c utilisas dans les co=posiziors liquides ou plastiques de scirti'à-1-ateuxs, tels que des solvants des   agents   facilitant la dissclution. des gels,   etc..   
 EMI9.2 
 Les C021wsit4-c;r.8 de scintil1ateurs suivant l'invec- tion peuvent être utilisées dans les divers procédés bien connus de détection et de dosage des radiations nucléaires* Par exemple,   on.   peut déceler la radioactivité   d'une   compo-   sition   en la   plaçant   dans la composition de sointillateur. 
 EMI9.3 
 Le dosage des radiatiO!l.3 Csises pe,,it r.c -o-;

  .--- . ,±<-,",,t le mélange dans un compteur convenable et en comptant les coups. On peut aussi détecter et   doses*   la radioactivité de sources externes en plaçant la composition de scintillateur encre la source radioactive et le compteur. 
 EMI9.4 
 



  Les exesplea suivaize illnszatent 1= pr4pration et lttilis2tion des comr)siticns de scini12atrs ait l'invention. 



  EXEMPLE 3- 
 EMI9.5 
 1-n dissent 3epay:<T*s.t Jns un iç41,;ig+ à parties ga# lei d'4±h;:sol 4-3 xylèr4z 4e àioJ!ag n g 1> - du 4t4'-di(57- di-t-peuT:ylb3s9Xu.sûl-2-yl)3tilbae à la due 8/1000, n aS3e ; 20 - du 1,4,5-"Zriphén=o-1-2-(p-stî]Eén%')- iidassi lE csnaaatyatio:! '; peu pies patite j Tt du 2,3"'ip"sylc?:a'ïole. Jtintîllatei#r usuel trës acif, servaEt de produit de comparaison. à la cencentration de 8/1000. en 

 <Desc/Clms Page number 10> 

 
 EMI10.1 
 cassa. A ,,y ee!=ryg solution. on 3jcte da 3w^R':e,.a..s,e.4y-.

   WT.ß'.%^G triti servant de soce 1e r2j:±n? bêta, e3 Z cop2r 8I1 tri.tin servajat sc.j!res ra'SES G'.3Âp 6.V..,é.a1,> le3 trô12 da.: s.'s'r.w.J. :,vu:3se '....."  zZ"1>1>bmt la v:'2* :00 l'fission :,ii:.la.t du s".:..., calle du ',wg.... â'"':3. ^  Li : Zg7La.Z0-. $.:.± i '!1 3a :s'r'.:: 92 21; celle 41 i p r' 5- ßriC:-'ß ':..tlhT.,.",.'.i.^,..le n la vale 1. 



  C;ci #cnir0u q les citi21Qte3 js ###<;=aEt a s' ."'.."f#...u sont presque 2.13,i s-ansibles eu =;:;: -â:-:'3i sensibles vue 1<s 2i;ti}'1:-:'?:Z*',: 2l ëEse i3 v, 'at'..H 6T oxiz5l.oe* .<.'PÎ.2 4 *- ¯¯¯ On dissc.1;5 3vi .I.p$-..;. '.߯,.¯.#d.e...j...8.'.rs,xz.is 1 * ) - 3. mOi1$ 1 1! dé?tls la. jr:::."r1::'7n.:: C;-1 :'-3"'3 ;2->? .s..¯,¯.¯.....¯ ";;z:ce b19u. SI'::S li.;.:r: j':?2 S.j'0:::; :t:.1< 
 EMI10.2 
 ....- - 111"'" ;.;o.;;:q,E;8 '2:lLi -. -- "ji4;:.¯:',-'::3 -3 . , ' , - .Sycol) .'>i.: is CR 1..-..C [;"] ¯.v, ¯:.tlg:13::':; .':::..;:: .:' 1:."-.. }-:- .:.<4C l'ci0 is :.sf,'û " " 
 EMI10.3 
 ¯EXE?<tFµgE la solution de S , ,S .>-< 'l. ( 3 ; 7=-fi 1-"6#.p*z# #i.-l>, : #:# ;; *J;== z .J. ? -Lyl)stiibéne préparer l'axes?3.s'3 eset m;m f''r'?j-:;'.î "'*:**' vert xci13 l'aetio das #.±yoi13



   <Desc / Clms Page number 1>
 
 EMI1.1
 



  New descriptions of the course and a new process of dt.e <: ti. '. Its nuclear regulations.
 EMI1.2
 ivexticn esncers.e 4th soM-ellas aonj'siti'as do sci: 3t! lLmt # .ii + n as -9.iti xïJ. # Zß de-- -les 3 '; T & t'ix sc "FiLlat> rs to la. d4t rctlon eù au .iw:., fi.ûq. 3i'G rzidlat4iir., z n.ào14aîx-eJ * t'es applieltlrjràz 4s; ,,, 3. dev-ctîen and a ,,%> 1 .; sàg; de la rldioaettvité presnoset-s' â.'s.3 'sn Plus' n-3p'3rt <ssce. C "* s * e- asx ;, eg = ple utllisç- dos counters 1 here; + 1.llatears p> nr etaie # 1 biochiatic action and '1'! ii $ eâs <'' sa = .2 'le "e: p'% :. ' 6 $ T'Wis'e''2: oruâlîqaene the tr-74jet of c-psës nùtritli = aaùiti;> nn; ls e de- -3î'oise.me <! Daas the p3, M! 3 p? Ur tD '. ^ vs ",, s'rE'

 <Desc / Clms Page number 2>

 
 EMI2.1
 the. ci = fluid capicn -.a4, "'= .â3.-t3 <.

   L.5 L. üji. scct '.15'3F de.ü $ a "." w' ... m. tras inpartant "! a .. :: s 7..9. research 'i 3. °' ksw.s, .i '. en .., e =" S m We hear, from a general background !! ", r; fU.: S'J: J: \: Lllateul" s
 EMI2.2
 products which é = etter! e 1.a # -iére p.ar fl # ttr4as> J> n = e qaaxd they scn-S z == zJ # io to an energy ayaat sc.s * rigi: n * ;; 1s 1I: .e -? Iwce àe # adìaXivitÔ. ± yeui detect 'st # ù5 # p <; 7 1-ss l.x.ir3 ---- lulx.x'j 3-3 the Eoirtà.llJtt ns .s = -à; ¯iin ds ùà "=.

    tr: = m..3 and from c - :? H? 3 a> rrs-riÉ3 * 122 pr "céds s'.a3.2 c ù.; :: = jztr.¯ge çar -. - -, - -, ¯,,,.; - i ..: -.,;;; ..,. - .- = .-;: g .., liqui- 4 * or 'î x- * iàùi.l, 1.fitéiir é miliot; jsàa: #x <# 1% # 1.ùw ± K ± 1.5 1: ce i "z" .3 ## iiz # #J ', la. = Sitios uia coEpresa 122? ±] Îé : I.É µ.9i "llil - #, 3É '? Qif to i JY = 1; 5 -S.3X.B <11 li q> 1 d?. o # rG ini qix * g * 3 a ± - 1s;. 2 0e> ¯ =? # To> #. #; C'3, i. = J "ii ... e * #" ¯.>:; .i <ie sx - '.' R .¯, - iy.a.,. w - ", 1:,; :: ..: .-. 4 '-? cYy <* 1 :: èÁl! < =, j * ;: 1% .a.à pi.3ati "u-à -I3SJ 1> Jqual le z: eià; =. i.-l., zM, #. # r st '? N .. # <;. i # a # 1.r7 # 1;.: ii.àe. Ls <ï -Eosiis 12? .3.i-, 4 <tz ..1? .. ii 3.J.1 .3; .ix c'ils eKt2.B3 'and #> at "% - Ieiit' 2 'scE.s' & itus..S'j ìlp = p .ér; iilt; ai # .s, B te13 qu.a .i?: 5c.1.x # .r; ts auà: 1 3.iair ?; p des z-erà.tx "iz # .J-.f." - t 1s sol> ;. bifl-it <Ey de.sx:1* * tc :.



  3BX-J - .. SOH? , the scsss Ô3> glilàgl125 li) "". to ÔLI # Î ..: iT2i17 fllls # r3st gn '¯ ;; # =. # 5. ##. 3w 31 31..ijna;> f GÙe # z21 #. ea; === i # .; t- e-Ji = ii 1.ir; 5c qat 1, à # il * '1 t? .T.à Y'2 ± ie illzwltéGc> OE: n <#Q E - ± Î. ±; ÌTGz ?, F lT.'É? Il 's: Ôozlé? L ± * r, 2 ".éiÉ à'Ô ± Z' 2a 5Çéoo '% X"? I ssia F3. 1, ± .2 "to35 ± 2 [Jfi." JÉI, ïlkl% 1 = pliea.ia = irs d'e'1J devices ds'Secrs 3; 03 .- = z jÉ. =; 5iaZJ # z = nt u . ? i l i- ± é =, J% au. # t ;;

   J qi "# ñz.5 s flsc .'- jp.," = - ir = j: r2 J ùg "fitbJ? 313 4'.Mettra '' 4 îmxi # = ed * longae: #w ri ào.oepiti. 'at.la:; z -. # *

 <Desc / Clms Page number 3>

 
 EMI3.1
 "" 'I! "¯¯¯¯ ...' kill uffiseen 'aoublas deùoc @ p $, uU1ileSi .J18 are not soluble enough to produce.' Useful way of light emissions dece- ', Ub1 ..., j ).,;. ta 'Fluorescent compounds are I (tJ}: v ..' .1 "y ',: çy.¯; ¯ ...; =,. inutilî 4, wheatw-dwn- from .con4t: t1ons . economical or else present; '. t't "a.it *: ti18' \ eu.vent1l for example.- mal 4> - produce,]. 1: 1st '4'! t. to J8, rtir d 'a sqiv = t parti- "cu1ier. 1 ^. dene, t' (e that we need to be able to cli, pe-" -ker of .G1; .ttmit $ a light -of length -:.



  'wave O "....- n't..ux" "te \ iX" 8 which we have and which does not pre-, .en'tent J *, if "J..nc..ment; 'Onné8 above. " ...



  ,:; '.:; J'T'-s 13Q'rl0liy que Cë3''Elh cola-., ON ..... '; J, .r / ""; "".;: ... <; t ..... .t. , j ;. ¯ .i: *, .. r,. "". - "-L '. 1 <'" ';' fP: "", '",., F" .A, ": t.r; \ J.f.' "11. ' 'f. . - poaé. 9 '. ¯f: .. ilae3axrs exegtirxue.e i> '"...!.;.; Tr'1j" v>' t ..:;.: -; , v ':; 'i 0 -.--, .- t. .ant - ..,., e, '; OD8 t "ormé & 8.! .. cs scintil-. {..!; t'; '7¯,', /.: ....." ".0 , ¯. ').' Ú, r ;, -if A 'i'r.é ".y.;" ". , e-:, $ <,., onganique au in a bzz 1uë ire extremely .satis- ',: ..1J' ': - 7. pp, 'fiYSha.e "' '} # y w-.r:." ^ sf ^, j' .- ''? ".8i". ^ a''B '[. E i * assay for nuclear radiation. 8, -', 1 Â '' 's rc. .w ^ = i '#' t '' 'X. ; = 1g, '<p' u 'F4v' am ement8 bit., Gamma. and Xz ':., j: f 1 "',; ':'" J ";" *,> g "-. '<. (..: ....; ..;"', ".. \ .; "<t, r,. ... .-.," ..¯enIOD 'for-object a' "> ,,,! ',;

   . ' . \, ". ',,:'. '' ';' ';; tt :.,', <, - $" 'ii "<. ...., ..,>' cppo8if., e. , SC1n ±; iaur: tt'nl.é-e doua scintillator. Present da ïl, 4, atimntt. Give a detectable wife ': .8OWI' ".t #: '' t Xà4 ± àtiçç nuc1é.aire1l dissolved -in a mt -:. :: '..



  '' it.u $ 1)): '' ':' '..:, ",'. Enclosed in the group -formed by ¯-? sl ', x:" 1 "iqtaso.ideg raxspreû, .. ^ ,.



  (\ 'C't;', ';:. Ti'nt! 11Art.ur coe.poncÍ A 1- -for-';) ,, -, "..t .. '1, - -. 1: ! ',,.; ¯ ... "- ,,,,,, - * ..., j.; .....: ..".'; ':
 EMI3.2
 "bad * geàµjà> N <îl3" "" ji ':. # io'Jf¯' * ....; a- J. .R-: n'Tc f j "GS", w1 - "'F iw" .a1 ", ...: .. .1. P: i &",' .. "". -1! ... '.,';. ' -t ¯
 EMI3.3
 HSW <<< - 'MT ""' '' <? 9 'Yr "e'E'4'.s â'sr" *' * "'' j., Ôù ,, 1i, 4lts- grOuPè, Jβ4ro- "rbOne. chosen 1 & J'OUpe8 <; "':' ...," 't "> ²" "'" 1? , yyI, ¯ .s ..: vtr joz ", .. t!"

 <Desc / Clms Page number 4>

 
 EMI4.1
 to: .w Fï. i i.6 p d M àa 'A.'9w i-y. 3F i Î p: d16 j.ûw .i. a 1 "i e3t an integer between zero and TM,: bi4aFi.3SeJ aPAZ'wi.'aüRS, f [ja iF es, - ur.



  114F â eo-rpria a.3 between tel '1e .'I d! c13: *, 'i17it>; J .il1'kY # âl7Lfi p un aniiér ù, i3isi .e; 2; e ers gt un ot z in
 EMI4.2
 "! t {...", "1 cho1 31 ç'trxi <," wi ,. ' â -., Fi NWJs; f dlô iorm.à.is3 (1) jt (1 # to (), ...... '' i qz '"#; <{, l,' J -.- N ,.: '., o ;. "f" # 4 - i - "": 1 ""' - J? ':;, e "µ'ô; as,!. rlj; t -, - & .1.
 EMI4.3
 



  -! '"' :: 'f8 (, 1.µ1, 1; to;;' !; m .. 'i-.7 1; *'%" - \ ,. "- ¯ .., - :; - '<\. ,,,. -'t :!.: "i-¯"' ;;; '' 'Jft; 1 "': - ± 1 1 = t /, tl 1;,;> '' 1 -µ *.? I. L 5.i; = 1.ùU Î ii r ¯ ¯¯¯ R ': 5 2,1; ti <Q,>'. B '5', - {'r \ â 'fr if Îl "' 'Î vr' r: -":. ',' ..... ¯ f> '. Ta.; 12':.: '! :: - 1. \' '..: via h., .. ÎéÎ 't-1-Y ÀK': 3L r; ,, ': .2 :::: "'.: - 2T '.'-: 1: 1f- :: -lI * - ', 3- .a, .. e' "- / .. Îk & 1, 1? F * 1'-7,,: 1 = 1: g z0 G. ::! 'R% 4 jY (= 1> -1 = where "o, ...... te ..: -. - 'o -t ..", "' ..:; '::: - =': '-.:,' I- .101-% - & '. ¯ "'; -,.,;: '¯ -' f 5, 1 <. ± 4 -. ', É ..a é 0" jJ' fl "'-: .- ;. -: = s.. ".. -> 6 -:,." - ', t .a -, A.,,' o .¯1. - <. "'",' "., ; - v ': $ j 9' ....- /Q.¯, ¯ ¯. ¯ z ¯.



  . <i h 2 1 1 1 "¯ 1J - ¯ ': / .'t: 1" t 7 ¯ - ¯' "'!::" 1f "t: -, ... -I!' "':.:, ....-: ..,'. '"-' # ..-. ¯,.:, 8 is'¯ -.............. -.... ': <1; - ..."' - z.aT 1 # 1, .t, T '... r4: -:' \> t ¯ 12 :? ± âi 11.-i t ....,.;

 <Desc / Clms Page number 5>

 
 EMI5.1
 radicals derived from benzoxazole aai3ia'b.ea, according to the invention, eo3K: w scintillator3 sent the following compounds: 4) 4'-i- (b.nzoxazol - yl) 8t11bne, 4,4'-ài- ( 5,7-di-ethyl-.-2 .i, lre, 4,4 '- = al (5,7-di-tert-pentylbenzo- xs: so! -'- y3jstilbaet 4,4' -.- à6 -hex.bencxl-.yl)
 EMI5.2
 9ilna, 4g4'-âi- (5.? - tri-hylenzoxazol-2-yl) tilbne,; 4,4 '(. 6,7, tr:: hi.a: ol - 2-yl) atilbn,, -' x 3 '"-i'-P = ßâ; 3yrnoxa. Ol-2 -.;, ril? ae, 4,4'-di- (5s: âr;, w'WS: iZ: La '".. l-2-yl) .ti ...' a7" iLSp 3,3'-di # àEthyl-4,4'dii, ß ..r: y: ':' ;: iitan, 3.

   J'-diphê: 1yl- ,, "..- µß. '.> Eri i,' sj,:, s.t." ßl3.i. ', Âta.:. #.:; '= ..' dsi '<.I "' h". "'" 3', â: - T: s, -â '.- .F.U. -9 f; "r. ''. ± Fô! 3 3 ':: t., = Y.F'3.,. A' .û.sl the ixvextion,. ').:, :: .1 '3 cy-scgôs:' Fr. $ F $ gx45 '' ;;; ':;, yl-2 - (' - tilny.) Ir: 4xz * 1->. ", 5-âri- (ës3s; ' 3hi% ¯> '. I,' - '! P-tlbényl) ilri-. :: g3: y, s gay "' sk.'ue '.;' Wy2x: eiiF; a'.sa ..rx.! iA.i - ".. cl, F" #F 'é6t rit.aj- i' â%,, r ^ ': .e'i..n, a "s''â.3'l.'. , .lâ.j '. $ ,.; ....- AÉr.J,
 EMI5.3
 - <? . ", 'to'. * É n iÉ 'À L i À" ùà -Î, i (j. = I to). ÉÎ: '1 1 /, É Î 1 1 b 1 3ilà À P,! S "" ,,, ..â' .. f ;;.,. E-e3.'ra "- T, '' ¯i i..W6.,. e "5i: ¯¯ ¯ ¯¯, ¯, - <Yy .. $ li> xi.5l:" ..- .. x 'a to' 3, - #: ¯, ,. .. x.1 r. ' .. ::: 1 ,... #. R,

 <Desc / Clms Page number 6>

 
The compounds used, according to the invention, as scintillators, can be prepared by any known process.

   For example, the scintillators containing a benzoxazole nucleus can be prepared according to the process described in Belgian patent 641,426. Acintillators containing an imidazole nucleus can be prepared as described by Gunther Drefahl and Reins Herma in: Chem-Berichte, Volune 93, pages 486-492 (1960).



   The following examples illustrate the preparation of the compounds used as ocintillators according to the invention.
 EMI6.1
 



  EXEItPL ± 1 - Priparaticn of 4'-dibenzox-2-Yl) stilbene A solution is heated under reflux for two hours.
 EMI6.2
 1.5 g of 4,41-di (chlorocarbonyl) stilbbre in 50 ml of dioxane with a solution of 1.1 g of orthoaminophenol in 5 ml of dioxane. The solution is cooled and filtered; 1.8 g of 4,4'-bis (c-
 EMI6.3
 h1droxyph4nylcrbamyl) atilbene. This product is heated under vacuum in an oil bath at 320 C-340 C; it is cooled and exhausted with benzene in a Soxhlet extinovator.
 EMI6.4
 0.93 g of d3 4,4'-di {tefizoxazolZ-yl) -st11bne is obtained under the strength of a yellow product melting between 365 C and 368 C.

 <Desc / Clms Page number 7>

 



   EXAMPLE 2 - Preparation of 1,4,5-triphenyl-2- (p-sitlbény1) - imidazole -
1.04 g of formyl-stilbene are reacted with 1.05 of tenzile and 1.08 g of ammonium acetate in 50 ml of crystallizable acetic acid. The mixture is refluxed for 1 h 30 m, diluted with water and made basic with ammonia. The expected product is collected by filtration. The yield is 80%. This product melts from 242 C to 244 C.



   Liquid solvents to which scintillators are added to force scintillator compositions according to the invention are well known to those skilled in the art of scintillators. For example, transparent solvents such as hydrocarbons or ethers can be used. selections
 EMI7.1
 binary such as KelRnges, & leE, ùla ut ..thydrocarbons and ethers or hydrocarbons and esters. As examples of such solvents, the following may be mentioned: teluene.
 EMI7.2
 xylene, t = 1 <thà + lbenzene, dioxane, p-cymene, anisole, sycichexane, heptane, 1,2-din ± tbcxyéthztù; a, tol & ne-tthand tol1.fme-tht! no 1 ethanol-xylnc-dticxanse nnp * r4tal * -rc-di.ox ,, Irre, tributyl naphthalene-phoi-phate, etc.



  We rerire its liquid conpositions of scintillates, by simple addition of the ecintÀ411 & attur to the ground, 9 agitatie. until granting of a so "& utlkor. hf? 'cg & 3e. It can use direeterent 1% ccmçciiàisn liquid-: we p -?' tt also çr4parér a cvncentrè solution that will be diluted with Tcr: ent ùe the use.



  1.4t11isa'ble plastics pc:.! "T'orm = r les c & pcsitica

 <Desc / Clms Page number 8>

 
 EMI8.1
 solids of 81 \ i2: 5ers 8 4le = and ieü Qrus des spi- -? i & list @ s. This smacks of: .. ûi. $ âa '.n $' fo'iE "3; ôâ trassp & ytes, for example L, .â'i .s t & r ': 9? l & Rtiq'. <es eis qe 1 <polyatt-yrêne. le8 polT% ltc171ates, lfacé :. de 3, .f3, pol7Yin71tolu: e. les.p9ly & =: de, pclycarho'mtes, poljlue chloride de pol7Yiny ttc .. Cn peu ': "3;.'" 'r: ei "" .3 'ai! $ I:' tIflB * E3 'at la = tièr-0 p: a8iqu. That it is & 1 * 41 fC3.iu, Vzr example. Au ect-râ dlute O.'r3: '..ZI,'. 8: '. S' ;; -. Ât ', J "Gti de ecu'4ee * ÇA can also & <sl: er 1 <-2 ci n - Wv 4-se; CR <: & t & ysey. i sÉi-! aiâ.V 4th tar..4a.J'ßdlriY'iu t W # 'ta:' .- k L. 4 - =.% re en un pcl'y ::: re S.,. Cf.9.t . =, i Ot "'t: 3.f ::': p-i'.id: '8 lesa *! le s': ointi11a.te! Jr se truV8 i3isor'.

   Ji3prs; The . é.p.rm, '' 'ww =. and ls raF "sv.s3. '. â.a: j9 i: m, r'. 'xf r va. ur. ...-.-, du 9c <è1"' e 4t1: 1s. r :: 1 caz, .3 il "il: 3fJçr% t '8 c ::; 1iic3 ply * r: x &ti;. pyeK * C! <.' 5 -lit 's .... r gy- y' . 4 gold ,.



  "'t': s n.;" -; t "'... a.1j4 {" ¯ "" 4.ii. \ .. t sst -':! - "'Ig}:" (": I .1; o -'tll-r'l "'- ¯: fI',. ,, '" .- C3i --...'. J "" l "" "" tr "l'-J- "'." -: 1o chan.3i,
 EMI8.2
 .ar¯:; :::; '"\ ;: l!;: .. t ('40 <'! tt :: n '.3' :::, '' - :: 4 ,,! wl ( '.;. 3 13 j 1 \: -';.,) H: 'rJ. I1 "-;: ..; <1 J.1 ..". I "..' 1>:, 1", -: 1: 't' i, .g = 1 '; ± *? ..; i7!' Z.3 1 1. to rE, '' '' 4c 7 ..,: ": 2 ±? 'F 1 .1. 1> '1 1'.> Z "M = 1 '> ±" 1 1.; Ji: lf iJ? É- i': "r. 'S'.t: .-'. X ix ...:? i: e '?' - "" * .. '. ".'. r '' .. ':" y.,. ï.: i, ...; ..' "1 ' ...>, r ...,: a:; y. "-!? 3c., .., as ... s.. ¯ ¯., iri" ",,. 4 # s. fi :. ., d ';: è iô âa "# ¯" =; .. i J 3': '-:.' '' <-, ':' :: ..- :: .. "-; :: : - ..:; t: tL: ..;: ...: ,, f'1 <.v -. Íl: r., .. '"" t .......,;. - ", <.. a.: Y ¯ b, .- d" - 1l - "':' i" '"' '' '= ¯x ¯. ¯' -u ... ü,, ¯- ,.,: .t'11 :. y 1 ,.: <.

    !,. "-" - ": '-: ;;: 1 -';.:. # ': -' .. T / 4" "-", ::,: # E., ',! <-! r1i'4 ",, '' Yo; '' 'J //! Jf-'t''I': 1 ...", -, r, 3T-.r "; '' .- .: '. 3' * "- *"? T '.,. ..R "' 3ir 1t '' Jt.i ... $ <, * 0 41 'h' = 5" 2. '; * Jl2 r - a 'sm k';, z ': ^ - LI:.' '. z?.



  'l4 "" ""': t; ..² -. ;; r> 5.> ±. 5 * i> *.



  1 3 P II ";

 <Desc / Clms Page number 9>

 If desired, we can'- to the compositions
 EMI9.1
 Sj.iv & E / t i.tinver-t, 4-or. various a1iii8 ..co "" m6 = e'c used in liquid or plastic co = posiziors of scirti'à-1-ateuxs, such as solvents dissolving agents. gels, etc.
 EMI9.2
 The following invection scintillator C021wsit4-c; r.8 can be used in the various well known methods of detecting and assaying nuclear radiation. For example, on. can detect radioactivity in a composition by placing it in the care composition.
 EMI9.3
 The determination of the radiiO! L.3 Csises pe ,, it r.c -o-;

  .---. , ± <-, ",, t mixing in a suitable counter and counting counts. Radioactivity from external sources can also be detected and dosed by placing the scintillator composition in the radioactive source and the counter.
 EMI9.4
 



  The following examples illustrate the preparation and use of the comr) siticns of scini12atrs to the invention.



  EXAMPLE 3-
 EMI9.5
 1-n dissent 3epay: <T * st Jns un iç41,; ig + with parts ga # lei d'4 ± h;: sol 4-3 xylèr4z 4th àioJ! Ag ng 1> - du 4t4'-di (57- di -t-peuT: ylb3s9Xu.sûl-2-yl) 3tilbae due 8/1000, n aS3e; 20 - of 1,4,5- "Zriphén = o-1-2- (p-stî] Eén% ') - iidassi lE csnaaatyatio :!'; little pies patite j Tt of 2,3" 'ip "sylc? : a'ïole. The usual very active jtintîllatei, served as a comparison product at the cencentration of 8/1000.

 <Desc / Clms Page number 10>

 
 EMI10.1
 broke. A ,, y ee! = Ryg solution. on 3jcte da 3w ^ R ': e, .a..s, e.4y-.

   WT.ß '.% ^ G triti serving as soce 1e r2j: ± n? beta, e3 Z cop2r 8I1 tri.tin servajat sc.j! res ra'SES G'.3Âp 6.V .., é.a1,> le3 trô12 da .: s.'s'r.w.J. :, vu: 3se '..... "zZ" 1> 1> bmt la v:' 2 *: 00 l'fission:, ii: .la.t du s ".: ..., calle du ' , wg .... â '"': 3. ^ Li: Zg7La.Z0-. $.:. ± i '! 1 3a: s'r'. :: 92 21; that 41 i p r '5- ßriC: -' ß ': .. tlhT.,. ",.'. i. ^, .. le n la vale 1.



  This is # cnir0u q the citi21Qte3 js ### <; = aEt as'. "'.." f # ... u are almost 2.13, i s-ansibles eu =;:;: -â: -:' 3i sensitive view 1 <s 2i; ti} '1: -:' ?: Z * ',: 2l ëEse i3 v,' at '.. H 6T oxiz5l.oe *. <.' PÎ.2 4 * - ¯¯ ¯ We dissc.1; 5 3vi .Ip $ - ..;. '.߯, .¯. # d.e ... j ... 8.'. rs, xz.is 1 *) - 3. mOi1 $ 1 1! d? tls there. jr :::. "r1 :: '7n. :: C; -1:' - 3" '3; 2->? .s..¯, ¯.¯ ..... ¯ ";; z: this b19u. IF ':: S li.;.: r: j':? 2 S.j'0 :::;: t: .1 <
 EMI10.2
 ....- - 111 "'";.; O. ;;: q, E; 8' 2: lLi -. - "ji4;:. ¯: ', -' :: 3 -3., ', - .Sycol).'> i .: is CR 1 ..- .. C [;"] ¯.v, ¯ : .tlg: 13 :: ':; . '::: ..; ::.:' 1:. "- ..} -: -.:. <4C l'ci0 is: .sf, 'û" "
 EMI10.3
 ¯EXE? <TFµgE the solution of S,, S.> - <'l. (3; 7 = -fi 1- "6 # .p * z # # i.-l>,: #: # ;; * J; == z .J.? -Lyl) stiibéne prepare the axes? 3 .s'3 eset m; m f''r '? j - :;'. î "'*: **' green xci13 the aetio das #. ± yoi13

 

Claims (1)

EMI11.1 EMI11.1 <tMf "*,''* Y fµ$ 'B ir E N à]& 9 , Î' Ô N S L 9"fi.. - Corpasitî'àà,Ée scintillateur essentiellement formée CI EMI11.2 ./,' ) siz.a-., prêtent en quantité suffisante pour dcu- ner une réponse décelable sous l'action d'une radiation nucléaire, dissous dans un =4-lieu solvant transparent EMI11.3 à#µ1, ¯ ..,: <tMf "*, '' * Y fµ $ 'B ir E N at] & 9, Î' Ô N S L 9" fi .. - Corpasitî'àà, Essentially formed scintillator CI EMI11.2 ./, ') siz.a-., lend in sufficient quantity to elicit a detectable response under the action of nuclear radiation, dissolved in a = 4-place transparent solvent EMI11.3 at # µ1, ¯ ..,: . =t . par ? razts ,ue ' choisi dans le groupe forzé par les scl.iants oraniues et les plastiques solides transparents, caractérisée en ce que la correspond à la formule générale EMI11.4 où chaque R désigne un groupe hydrocarbené, choisi parmi les grouper alcoyle, aryle, alcaoylaryle, et arylalcoyle, m est un entier compris entre zéro et quatre, ¯limites EMI11.5 "ÉÉ?ncluxes, .e1;t..,.t:#'-ên'tiêrëc%:"ipri$ er.tre"'Z6o et cinq, limites incluses, 2 désigne un ersier choisi entre zéro et un et Z désigne un radical choisi parmi les radicaux EMI11.6 fonsules- (1'et (11) j* P , ),. . = t. by ? razts, ue 'chosen from the group forzé by scl.iants oraniues and transparent solid plastics, characterized in that the corresponds to the general formula EMI11.4 where each R denotes a hydrocarbene group, chosen from among alkyl, aryl, alkaoylaryl, and arylalkyl, m is an integer between zero and four, ¯ limits EMI11.5 "ÉÉ? Ncluxes, .e1; t ..,. T: # '- ên'tiêrëc%:" ipri $ er.tre "' Z6o and five, limits included, 2 denotes an ersier chosen between zero and one and Z denotes a radical chosen from radicals EMI11.6 fonsules- (1'and (11) j * P,) ,. (Rt EMI11.7 /$/,8.?j" dans lesquelles 8, m et n ont . -:;.'zcs3ana précitées, EMI11.8 t'(é.µ avec la ccnditicn que Z présente 1 fareule (11) quand ' iQ=éjs ea "'"i .(. p est égal à zéro. (Rt EMI11.7 /$/,8.?j "in which 8, m and n have. -:;. 'Zcs3ana above, EMI11.8 t '(é.µ with the ccnditicn that Z presents 1 fareule (11) when' iQ = éjs ea "'" i. (. p is equal to zero. 13,r[( 2.- Composition confirme à la revendication 1 en ce que la proportion massique du scintillateur est comprise entre 5.10-5 et 1.10-1. <Desc/Clms Page number 12> 3, - Compoaition de scintillateur conforme à la revendication 1 au 2, en ce que le scintillateur utilisé est le 4,4'- EMI12.1 di(5p?)-di-t-pentylberzoxazol-2-yl)-etilbène. 13, r [(2.- Composition confirms in claim 1 that the mass proportion of the scintillator is between 5.10-5 and 1.10-1. <Desc / Clms Page number 12> 3, - Scintillator composition according to claim 1 to 2, in that the scintillator used is the 4,4'- EMI12.1 di (5p?) - di-t-pentylberzoxazol-2-yl) -etilbene. 4. - Composition de scintillateur conforme à la revendication 1 ou 1 on ce que le seintillateur utilisé est le 1,4,5- triphényl-2 (p-stilbényl)imidazole. 4. - A scintillator composition according to claim 1 or 1 that the seintillator used is 1,4,5-triphenyl-2 (p-stilbenyl) imidazole. 5. - Procédé de détection des radiations nuclaires au moyen d'une composition de scintillateur, caractérisé en ce que la dite composition cet conforme à l'une quelconque des revendications précédentes. 5. - A method of detecting nuclear radiation by means of a scintillator composition, characterized in that said composition this according to any one of the preceding claims.
BE742945D 1969-05-28 1969-12-10 Scintillating compns and nuclear radiation detection - method BE742945A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418473A1 (en) * 1978-02-22 1979-09-21 Ciba Geigy Ag PRODUCTS USED FOR SCINTILLATION COUNTING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418473A1 (en) * 1978-02-22 1979-09-21 Ciba Geigy Ag PRODUCTS USED FOR SCINTILLATION COUNTING

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