A Double-Pulse Total-Absorption Fast Neutron Spectrometer
- National Bureau of Standards, Washington, DC (United States)
A fast neutron spectrometer utilizing the double-pulse total absorption technique was developed for use in the energy range 1 to 20 Mev. The total absorption spectrometer uses a hydrogenous scintillator, in which a fast neutron may lose all its energy, together with a detector for slow neutrons. Scintillation detection of the disintegration caused by absorption of a slow neutron in an element of high reaction cross section serves to identify those neutrons which lost essentially all their energy in the hydrogenous scintillator. Various organic liquid scintillators loaded with natural methyl borate, and a plastic scintillator with a boron-10 or lithium-6 slow neutron scintillation detector nearby were all tested with monoenergetic neutrons obtained from the D(d,n)He3 and obtained with a plastic scintillator and a Li6I(Eu) crystal. Representative data for this spectrometer are given. For comparison purposes, the results of Monte Carlo calculations, for a phenylcyclohexane liquid scintillator loaded with methyl borate (B10 enriched), are also included.
- Research Organization:
- National Bureau of Standards, Washington, DC (United States)
- Sponsoring Organization:
- US Department of Commerce
- NSA Number:
- NSA-13-015273
- OSTI ID:
- 4246417
- Report Number(s):
- NBS-TN--1; PB-151360
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION-- BORATES-- BORON 10-- CROSS SECTIONS-- ENERGY RANGE-- EUROPIUM-- FAST NEUTRONS-- HEXANE-- HYDROGEN COMPOUNDS-- LITHIUM IODIDES-- LITHIUM 6-- MEASURED VALUES-- METHYL RADICALS-- NEUTRON SPECTROMETERS-- NUMERICALS-- ORGANIC COMPOUNDS-- PHENYL RADICALS-- PHOSPHORS-- POLYMERS-- PULSES-- SCINTILLATIONS-- THERMAL NEUTRONS
DEUTERIUM-- DEUTERON BEAMS-- ENERGY RANGE-- FAST NEUTRONS-- HELIUM 3-- NEUTRON SOURCES-- NUCLEAR REACTIONS
DEUTERON BEAMS-- ENERGY RANGE-- FAST NEUTRONS-- HELIUM 4-- NEUTRON SOURCES-- NUCLEAR REACTIONS-- TRITIUM
ABSORPTION-- BORATES-- BORON 10-- CROSS SECTIONS-- ENERGY RANGE-- EUROPIUM-- FAST NEUTRONS-- HEXANE-- HYDROGEN COMPOUNDS-- LITHIUM IODIDES-- LITHIUM 6-- MEASURED VALUES-- METHYL RADICALS-- NEUTRON SPECTROMETERS-- NUMERICALS-- ORGANIC COMPOUNDS-- PHENYL RADICALS-- PHOSPHORS-- POLYMERS-- PULSES-- SCINTILLATIONS-- THERMAL NEUTRONS
DEUTERIUM-- DEUTERON BEAMS-- ENERGY RANGE-- FAST NEUTRONS-- HELIUM 3-- NEUTRON SOURCES-- NUCLEAR REACTIONS
DEUTERON BEAMS-- ENERGY RANGE-- FAST NEUTRONS-- HELIUM 4-- NEUTRON SOURCES-- NUCLEAR REACTIONS-- TRITIUM