Effect of beta-electron capture to a bound state on delayed-neutron emission from fission fragments

Journal Article · Sun Jun 15 04:00:00 EDT 2008 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S106377880806001X· OSTI ID:21402571

Gangrsky, Yu P ^[1]; Karpeshin, F F ^[2]; Penionzhkevich, Yu E ^[1]

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1. Joint Institute for Nuclear Research (Russian Federation)
2. St. Petersburg State University, Institute of Physics (Russian Federation)

The effect of ionization of the atomic electron shell on beta decay is investigated. The change in the beta-decay probability is due primarily to the appearance of the channel involving beta-electron capture to a bound state. It is shown that the effect may be significant at low beta-transition energies. The magnitude of the effect was studied in the case of the emission of one to three delayed neutrons following the beta decay of fission fragments. In the calculations, use was made of the beta-decay strength function with allowance for the population of isobaric resonances in daughter nuclei. The effect proved to be maximal for fragments where the numbers of protons and neutrons approach those in closed shells and subshells, thereby illustrating the role of the shell structure of the nucleus in fission.

• OSTI ID: 21402571
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 6 Vol. 71; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BARYONS
BETA DECAY
BOUND STATE
CAPTURE
DECAY
DELAYED NEUTRONS
ELECTRON CAPTURE
ELECTRONIC STRUCTURE
ELEMENTARY PARTICLES
EMISSION
FERMIONS
FISSION FRAGMENTS
FISSION NEUTRONS
FUNCTIONS
HADRONS
IONIZATION
ISOBARIC NUCLEI
NEUTRON EMISSION
NEUTRONS
NUCLEAR DECAY
NUCLEAR FRAGMENTS
NUCLEI
NUCLEONS
PROBABILITY
PROTONS
RESONANCE
STRENGTH FUNCTIONS