Resonance neutron capture in 138Ba and 140Ce and the prompt neutron correction to γ-ray detectors
Creators
- 1. Australian Atomic Energy Commission Research Establishment, Lucas Heights
- 2. Oak Ridge National Lab., TN (USA)
Description
The neutron capture cross sections of 138Ba and 140Ce have been measured with high energy resolution between 3 and 100 keV using the capture cross section facility at the 40m station of the Oak Ridge Electron Linear Accelerator. The average s-wave level spacings are 6.3 +or- 1.7 and 3.2 +or- 0.8 keV for 138Ba and 140Ce respectively. The deduced s-wave neutron strength functions and the average s-wave radiative widths are given. The p-wave neutron strength functions and the average 30 keV Maxwellian capture cross sections are also given. A more rigorous treatment of the prompt neutron correction for γ-ray detectors is described, and it is shown that previously published results for 138Ba have underestimated this correction. The 140 Ce data provide excellent corroboration for the calculated magnitude and time dependence of the prompt neutron correction
Additional details
Publishing Information
- Journal Title
- Aust. J. Phys.
- Journal Issue
- v.32(3
- Series
- Aust. J. Phys.
- ISSN
- 0004-9506
INIS
- Country of Publication
- Australia
- Country of Input or Organization
- Australia
- INIS RN
- 11498834
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- BARIUM 138 TARGET; BARIUM 139; CAPTURE; CERIUM 139; CERIUM 140 TARGET; CROSS SECTIONS; ENERGY LEVELS; GAMMA RADIATION; LEVEL WIDTHS; MEV RANGE 10-100; MEV RANGE 100-1000; NEUTRON REACTIONS; PROMPT NEUTRONS
- Descriptors DEC
- BARIUM ISOTOPES; BARYON REACTIONS; BARYONS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CERIUM ISOTOPES; DAYS LIVING RADIOISOTOPES; ELECTROMAGNETIC RADIATION; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTARY PARTICLES; ENERGY RANGE; EVEN-ODD NUCLEI; FERMIONS; FISSION NEUTRONS; HADRON REACTIONS; HADRONS; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; IONIZING RADIATIONS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MEV RANGE; MINUTES LIVING RADIOISOTOPES; NEUTRONS; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; NUCLEONS; RADIATIONS; RADIOISOTOPES; RARE EARTH NUCLEI; TARGETS