RU1575734C - Substance for scintillation gamma-resonance detector - Google Patents

Description

1

(21) 4432722/25 (22) 18.0488

(46) 301293 Bub№ 47-48 (72) Zuber VM, Tarasov VA (54) SUBSTANCE FOR SCINTILLATION GAMMA RESONANT DETECTOR (57) The invention relates to scintillation detectors and can be used in resonant Mössbauer spectroscopy The aim of the invention is to detection efficiency of resonant radiation The goal is achieved by using a-methylnaphthapine as a scintillation base and a ferrocyanium potassium as a resonant absorber in the ratio, wt.% liquid scintillator - a-methylnaphthalene - 80-95, resonance absorber - in the rest of the detectors proposed substance more than 2-fold improved detection efficiency at the resonance-radiation compared to prior art due to the high transparency of the composition at a high content absorber 2 t-aba 1 nN GBF

The invention relates to the field of experimental nuclear physics and can be used to detect resonant gamma radiation.

The chain of the invention is to increase the efficiency of detecting resonant radiation.

Replacing organic plastic with a liquid scintillator (LC) made it possible to obtain a transparent mixture with a uniformly shaped volume resonant absorber. The substance is prittalivzets by simple mixing of the selected components of Isp according to the concentration. The use of potassium ferocyanide as a resonant absorber provides a well-resolved single resonance absorption line.

Resonant radiation detectors with an efficiency of 60% were obtained from the proposed substance, which allowed them to be used in industrial express methods.

Five scintillation resonance substance compositions were prepared containing different scintillator-to-converter ratios. The proposed composition of the components, as well as the parameters of the known solution, are given in Table 1, Table 1. Figure 2 shows a comparative analysis of the transparency of the plastic scingillor and the proposed composition with different contents of the resonance absorber.

As can be seen from the table, the proposed substance more than 2 times improved the efficiency of registration of resonant gamma radiation for the three compositions of the substance (2, 3, 4) compared with the known

When conducting comparative measurements of transparency, ZhS 13 (BPO vzlfa-methylnaphthalene) was used as a liquid scintillator. Polyvinyl xylene with paraterdenyl and POPOP additives was used as a plastic scintillator. To ensure the identity of measuring the transparency of the composition based on LS and plastic scintillator (PS), the samples were prepared as follows. Films containing an absorber pheorocyanide kch were prepared from PS compositions by the method of irrigation of a solution in toluene.

whether in the amount of May 5, 12, and 70, as well as those that do not absorb, after

Film thickness 0.2 mm.

ZhS compositions with and without absorber on May 5, 12, and 20% were applied onto glass substrates and pressed against them with coverslips until

layer thickness 0.2 mm (adjusted by thickness limiters).

The emission spectra of both scintillo - toro (PS and FS) have a maximum at a wavelength of -420 nm.

The transparency (transmission) of scintillas and ionic compositions was measured at this wavelength with a HITACHI-ZZ spectrophotometer. The transmission of the PS composition was measured relative to air, and

LC compositions are a relative glass substrate with a cover glass (to exclude the contribution of the latter to transmission).

The measurement results are presented in table. 2

The results obtained show a higher transparency of the LC compounds, especially with a high absorber content. It is this advantage that allows the introduction of large quantities

absorber with minimal loss of optical properties, provides high efficiency of registration of resonant radiation

(56) Copyright certificate of the USSR N; 528796 cells G 01 G 1/204, 1975.

Mandjurov I.G. at. all Resonance scpntillators for recoldss 14.4 Kev gamma-quata with 57РеРз2НгОand

K457Re (SC) bZN20. - Reports of the Bulgarian Academy of Sciences - 1985, 39.1, p 37 39

Baluev A.V. et al. Gamma-resonance scintillation detection unit

for mass spectroscopy on iron-57. Sat doc. IX All-Union Conference Status and prospects for the development and use of scintillators and scintillation detectors in the XI: tablet

Kharkov 1986 from 127

Table 1

Claims (2)

1. SUBSTANCE FOR A SCINTILLATION GAMMA RESONANT DETECTOR, consisting of a scintillator and a resonant absorber with an iron-57 stable isotope enriched up to 90%, characterized in that in order to increase the detection efficiency of resonant radiation, as a scintillator table 2 0 used a liquid scintillator based on alpha-methylnaphthalene in the following ratios of components, wt.%: Alphamethylnaphthalene-based liquid scintillator 80 - 95 Resonance absorber 2. A substance according to claim 1, characterized in that potassium ferrocyanide is used as a resonant absorber.