Mechanisms of excitation of T-odd correlations for prescission gamma rays and structure of these correlations

Journal Article · Sat Aug 15 04:00:00 EDT 2009 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778809080109· OSTI ID:21449006

Bunakov, V E ^[1]; Kadmensky, S S ^[2]

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1. Russian Academy of Sciences, Petersburg Nuclear Physics Institute (Russian Federation)
2. Voronezh StateUniversity (Russian Federation)

Conditions for the appearance and observation of prescission gamma rays emitted by a fissioning nucleus prior to its separation into fission fragments were investigated within quantum-mechanical fission theory. It is shown that these conditions are realizable in the gamma decay of isovector electric giant dipole resonances in a fissile nucleus that are excited because of nonadiabaticity of the collective deformation motion of the nucleus at the ultimate stages of its prefission evolution. Angular and energy distributions of prescission gamma rays emitted by unpolarized fissioning nuclei are analyzed. Features of T-odd correlations in angular distributions of gamma rays arising in the fission of unpolarized target nuclei that is induced by polarized cold neutrons are investigated, and it is shown that these correlations are similar in nature to T-odd ROT correlations discovered earlier for alpha particles emitted in the ternary fission of nuclei.

• OSTI ID: 21449006
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 8 Vol. 72; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
BARYONS
CHARGED PARTICLES
COLD NEUTRONS
CORRELATIONS
DECAY
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
FISSION
FISSION FRAGMENTS
GAMMA DECAY
GAMMA RADIATION
HADRONS
IONIZING RADIATIONS
ISOVECTORS
MECHANICS
NEUTRONS
NUCLEAR DECAY
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
QUANTUM MECHANICS
RADIATIONS
SPECTRA
TENSORS
TERNARY FISSION
VECTORS