Relative measurements of photofission cross sections with the use of a bremsstrahlung spectrum

Journal Article · Sat Mar 15 04:00:00 EDT 2008 · Physics of Particles and Nuclei

DOI:https://doi.org/10.1134/S1063779608020020· OSTI ID:22974855

Soldatov, A. S. ^[1]

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1. Institute of Physics and Power Engineering, Obninsk (Russian Federation)

This survey is devoted to the investigation of fission probability by measuring photofission yields using a bremsstrahlung spectrum of the microtron with the relative measurement method in the region of energies from the threshold to the upper boundary of the fissility plateau (E < 11 MeV). The results were obtained using a unique technique for nineteen nuclei from {sup 232}Th to {sup 249}Cf. For some nuclei in the threshold energy region, detailed measurements were performed which provided the possibility of observation of new resonances in the photofission cross section. The observed resonance effects are discussed. For {sup 234}U and {sup 238,} {sup 240,} {sup 242}Pu, theoretical analysis was performed to obtain the fission barrier parameters for fission channels with particular quantum states. Data of other measurements of photofission cross sections are given, along with the results obtained in the surveyed series of measurements. The data obtained using the relative measurement method is compared with data for other reactions that result in fission of the nuclei under study.

• OSTI ID: 22974855
• Journal Information: Physics of Particles and Nuclei, Journal Name: Physics of Particles and Nuclei Journal Issue: 2 Vol. 39; ISSN 1063-7796
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BREMSSTRAHLUNG
CALIFORNIUM 249
CROSS SECTIONS
PHOTOFISSION
PLUTONIUM 242
QUANTUM STATES
SPECTRA
THORIUM 232
THRESHOLD ENERGY
URANIUM 234