Calculated gamma-ray spectra for keV neutron capture in /sup 240/Pu, /sup 242/Pu, and /sup 238/U
Capture gamma-ray spectra of /sup 240/Pu, /sup 242/Pu, and /sup 238/U were calculated in the framework of the spherical optical model and the statistical model. A consistent set of input parameters was determined from available experimental information or from model-guided systematics. The complete gamma-ray cascades were calculated considering all possible transitions up to multiplicity seven. All experimental information on level schemes and gamma-ray transition probabilities of the compound nuclei was explicitly included as input. The capture gamma-ray spectra were used to correct experimental data for the capture cross sections of /sup 240/Pu and /sup 242/Pu from a relative measurement using a Moxon-Rae detector with a graphite converter and with /sup 197/Au and /sup 238/U as standards. This correction is required to take into account that the detector efficiency is not exactly proportional to the gamma-ray energy. The resulting correction factors proved to be negligible for measurements relative to /sup 238/U; whereas, they are about 3% if gold is used as a standard.
- Research Organization:
- Centro di Studi e Ricerche E. Clementel Comitato Nazionale per l'Energia Nucleare Divisione di Fisica, I-43100 Bologna
- OSTI ID:
- 5307635
- Journal Information:
- Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 83:3; ISSN NSENA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Neutron capture cross section ratios of plutonium-240 and plutonium-242 versus gold-197 in the energy range from 50 to 250 keV
Calculation of fission neutron spectra for spontaneous fission of sup 240 Pu, sup 238 Pu and sup 242 Pu
Related Subjects
A=220 & above
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CAPTURE
CROSS SECTIONS
GAMMA SPECTRA
GOLD 197
GOLD ISOTOPES
HADRON REACTIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
PARAMETRIC ANALYSIS
PLUTONIUM 240 TARGET
PLUTONIUM 242 TARGET
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
STATISTICAL MODELS
TARGETS
URANIUM 238 TARGET