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Absolute calibration of neutron detectors in the 10--30 MeV energy range. [Associated particle method using D(d,n)/sup 3/He reaction]

Conference · · Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)
OSTI ID:7355176
 [1]; ; ; ;
  1. Atomic Energy Research Establishment, Harwell, Eng.
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A central problem in fast neutron research is that of finding the absolute efficiency of neutron detectors. Using the associated particle method for this purpose, we have designed a chamber to count He particles from the D(d,n)/sup 3/He or the T(d,n)/sup 4/He reaction in coincidence with neutron events. The reactions take place in deuterium or tritium gas and a ..delta..E solid state counter at 80/sup 0/, 65/sup 0/, or 43/sup 0/ to the 2-10 MeV deuteron beam direction detects the He particles with 100 percent efficiency. To reduce background we allow the deuterons to pass out of the gas chamber through a Ni window and stop the beam approximately 150 cm from the counters. With the D(d,n)/sup 3/He reaction we have obtained approximately 2 percent efficiency calibration of the central portion of a liquid scintillator in the 9-10 MeV energy range. With the T(d,n) reaction this calibration can be extended to approximately 27 MeV and the efficiency can be mapped out as a function of position in the scintillator.

OSTI ID:
7355176
Journal Information:
Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States), Journal Name: Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States) Vol. 1; ISSN XNBSA
Country of Publication:
United States
Language:
English

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Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BARYONS
CALIBRATION
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COUNTING TECHNIQUES
DEUTERIUM
DEUTERON REACTIONS
DIRECT REACTIONS
EFFICIENCY
ELEMENTARY PARTICLES
ENERGY RANGE
FAST NEUTRONS
FERMIONS
HADRONS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
LIQUID SCINTILLATION DETECTORS
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 10-100
NEUTRON DETECTORS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
RADIATION DETECTORS
SCINTILLATION COUNTERS
STABLE ISOTOPES
STRIPPING
TRANSFER REACTIONS