Gamma-ray study of short-lived aggregate fission products from {sup 235}U(n,f)
- and others
A high purity germanium detector was used to measure gamma-ray spectra following thermal neutron-induced fission of {sup 235}U for eighteen delay time intervals in the range 0.1-100,000 a following fission. A helium-jet system was used to rapidly transport fission products to a low-background counting area. The gamma-ray spectrometer employed beta-gamma coincidence as well as a Nal(Tl) annulus for background suppression. Nearly 300 gamma-ray peaks have been analyzed for delay-time intervals < 10 s after fission in the energy range 0-6 MeV. The time evolution of a peak provides information about the lifetime of the precursor nuclide as well as the ratio of its direct production in fission to its production through radioactive decay. Where decay schemes are known the measured gamma-ray intensities can be used to deduce relative yields and in some cases metastable-to-ground-state production probabilities. Results of lifetimes, yields, etc. of short-lived products will be compared with CINDER 10 calculations based on ENDF/B-IV fission-product data.
- OSTI ID:
- 386971
- Report Number(s):
- CONF-931044-; ISSN 0003-0503; TRN: 96:026909
- Journal Information:
- Bulletin of the American Physical Society, Vol. 38, Issue 9; Conference: Fall meeting of the Division of Nuclear Physics of the American Physical Society, Pacific Grove, CA (United States), 20-23 Oct 1993; Other Information: PBD: Oct 1993
- Country of Publication:
- United States
- Language:
- English
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