GB960548A - Process and device for determining the proportion of simultaneously emitted neutrons - Google Patents

Process and device for determining the proportion of simultaneously emitted neutrons

Info

Publication number
GB960548A
GB960548A GB3053962A GB3053962A GB960548A GB 960548 A GB960548 A GB 960548A GB 3053962 A GB3053962 A GB 3053962A GB 3053962 A GB3053962 A GB 3053962A GB 960548 A GB960548 A GB 960548A
Authority
GB
United Kingdom
Prior art keywords
neutrons
dead time
proportion
counters
detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3053962A
Inventor
Albert Gey
Jacques Jacquesson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of GB960548A publication Critical patent/GB960548A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T3/00—Measuring neutron radiation

Abstract

960,548. Detecting neutrons. COMMISSARIAT A L'ENERGIE ATOMIQUE. Aug. 9, 1962 (Aug. 11, 1961], No. 30539/62. Heading G1A. [Also in Division G6] Apparatus for determining the proportion of prompt neutrons emitted by a neutron source comprises a detector coupled to two counting circuits, the first counting circuit having negligible dead time and the second counting circuit having a dead time of the same order as the time delay between the appearance of a free neutron and its detection by the detector. The counts obtained from the two counters can be used to calculate the proportion of prompt neutrons emitted, and the apparatus can be used for testing a sample of plutonium by measuring the number of neutrons produced by spontaneous fission as distinct from neutrons produced by (alpha, n) reactions in impurities. In the Figure the detector 1 comprises six proportional boron trifluoride counters immersed in a paraffin moderator, and its output passes through unit 2 to two lines leading to counters 3 and 5. The first line has negligible dead time, e.g. about 10<-5> seconds, whilst the second line includes a device 4 which introduces a dead time of about 10<-3> seconds; the device 4 may be a monostable multivibrator having an adjustable time constant.
GB3053962A 1961-08-11 1962-08-09 Process and device for determining the proportion of simultaneously emitted neutrons Expired GB960548A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR870695A FR1305502A (en) 1961-08-11 1961-08-11 Method and devices for determining among the neutrons emitted by a source the number of those appearing simultaneously

Publications (1)

Publication Number Publication Date
GB960548A true GB960548A (en) 1964-06-10

Family

ID=8761183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3053962A Expired GB960548A (en) 1961-08-11 1962-08-09 Process and device for determining the proportion of simultaneously emitted neutrons

Country Status (4)

Country Link
CH (1) CH387815A (en)
FR (1) FR1305502A (en)
GB (1) GB960548A (en)
LU (1) LU42146A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454366A (en) * 1965-06-29 1969-07-08 Commissariat Energie Atomique Electronic controls of a plutonium extraction battery employing neutron detectors
EP2299295A1 (en) * 2009-09-18 2011-03-23 The European Atomic Energy Community (EURATOM), represented by the European Commission Neutron multiplicity counting

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454366A (en) * 1965-06-29 1969-07-08 Commissariat Energie Atomique Electronic controls of a plutonium extraction battery employing neutron detectors
EP2299295A1 (en) * 2009-09-18 2011-03-23 The European Atomic Energy Community (EURATOM), represented by the European Commission Neutron multiplicity counting
WO2011032743A1 (en) * 2009-09-18 2011-03-24 The European Atomic Energy Community (Euratom), Represented By The European Commission Neutron multiplicity counting
US8884212B2 (en) 2009-09-18 2014-11-11 Ludwig Holzleitner Neutron multiplicity counting

Also Published As

Publication number Publication date
FR1305502A (en) 1962-10-05
LU42146A1 (en) 1962-10-01
CH387815A (en) 1965-02-15

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