Calibration of CR-39 for detecting fusion neutrons

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143542· OSTI ID:7015831

Collopy, M T; Carpenter, P; Harmon, C D; Vandenberg, J; Cooper, G W ^[1]; Ruiz, C L; Reyes, P; Stygar, W A; Schmidlapp, A ^[2]; Malbrough, D J; Becker, R ^[3]

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1. University of New Mexico, Albuquerque, New Mexico 87131 (United States)
2. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
3. General Electric Company (GEND), St. Petersburg, Florida 34649 (United States)

We have measured the efficiency (tracks per incident neutron) of pure CR-39 for detecting DD and DT neutrons. Neutrons having average energies of 2.9 MeV (DD) and 14.8 MeV (DT) were produced by a 200-keV electrostatic accelerator and the neutron yields were measured using the associated particle counting technique. All CR-39 samples irradiated by DD or DT neutrons were etched for 2 h in a 70{degree}, 6.25-N NaOH bath. For bare CR-39, the efficiencies for detecting 2.9- and 14.8-MeV neutrons were found to be (1.3{plus minus}0.4){times}10{sup {minus}4} and (5.0{plus minus}1.8){times}10{sup {minus}5}, respectively. We also investigated using CR-39 and polyimide as proton radiators. For detecting 2.9-MeV neutrons, the radiators had no significant effect on efficiency; but for detecting 14.8-MeV neutrons the polyimide radiator increased the efficiency to (7.8{plus minus}2.8){times}10{sup {minus}5}.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7015831
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 63:10; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALIBRATION
CHARGED-PARTICLE REACTIONS
DETECTION
DEUTERIUM TARGET
DEUTERON REACTIONS
DIELECTRIC TRACK DETECTORS
EFFICIENCY
ELEMENTARY PARTICLES
ENERGY RANGE
ETCHING
EVEN-ODD NUCLEI
FERMIONS
HADRONS
HELIUM 3
HELIUM ISOTOPES
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
NEUTRON DETECTION
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PROTONS
RADIATION DETECTION
RADIATION DETECTORS
RADIOISOTOPES
STABLE ISOTOPES
SURFACE FINISHING
TARGETS
TRITIUM
TRITIUM TARGET
YEARS LIVING RADIOISOTOPES