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Neutron decay width of one-particle resonant levels in deformed nuclei

Hamamoto-Kuroda, Ikuko LU (2008) In Physical Review C (Nuclear Physics) 77(5). p.6-054311
Abstract
The neutron partial decay width of one-particle resonant levels that are the bandhead states in odd-N deformed nuclei is estimated in the formalism with a real-energy variable, using the width of one-particle resonance calculated in terms of eigenphase. It is shown that because of the presence of various (lj) components in a given one-particle resonant level of deformed nuclei, the neutron decay width can be quite different from the one obtained from assuming a spherically symmetric nuclear shape. As a numerical example, the formalism is applied to the case of the nucleus Be-13(4)9, which lies outside the neutron drip line by 100-200 kcV. Considering that the core of the nucleus consisting of four protons and eight neutrons is most likely... (More)
The neutron partial decay width of one-particle resonant levels that are the bandhead states in odd-N deformed nuclei is estimated in the formalism with a real-energy variable, using the width of one-particle resonance calculated in terms of eigenphase. It is shown that because of the presence of various (lj) components in a given one-particle resonant level of deformed nuclei, the neutron decay width can be quite different from the one obtained from assuming a spherically symmetric nuclear shape. As a numerical example, the formalism is applied to the case of the nucleus Be-13(4)9, which lies outside the neutron drip line by 100-200 kcV. Considering that the core of the nucleus consisting of four protons and eight neutrons is most likely prolately deformed, we point out the possibility that two lowest lying levels have I-pi = 1/2(+) for the N = 9 nucleus, and the higher lying one may have a neutron decay width that is much narrower than the one expected for an s(1/2) level at the same resonance energy. The structure of some Omega(pi) = 1/2(+) one-particle resonant levels, which are smoothly connected to weakly bound one-particle levels as the potential strength becomes stronger, is also analyzed using the present formalism. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C (Nuclear Physics)
volume
77
issue
5
pages
6 - 054311
publisher
American Physical Society
external identifiers
  • wos:000256885600021
  • scopus:44649152518
ISSN
0556-2813
DOI
10.1103/PhysRevC.77.054311
language
English
LU publication?
yes
id
17d1803d-49b7-449b-9990-5b11da57e551 (old id 1190543)
date added to LUP
2008-09-08 09:55:46
date last changed
2017-01-01 05:38:37
@article{17d1803d-49b7-449b-9990-5b11da57e551,
  abstract     = {The neutron partial decay width of one-particle resonant levels that are the bandhead states in odd-N deformed nuclei is estimated in the formalism with a real-energy variable, using the width of one-particle resonance calculated in terms of eigenphase. It is shown that because of the presence of various (lj) components in a given one-particle resonant level of deformed nuclei, the neutron decay width can be quite different from the one obtained from assuming a spherically symmetric nuclear shape. As a numerical example, the formalism is applied to the case of the nucleus Be-13(4)9, which lies outside the neutron drip line by 100-200 kcV. Considering that the core of the nucleus consisting of four protons and eight neutrons is most likely prolately deformed, we point out the possibility that two lowest lying levels have I-pi = 1/2(+) for the N = 9 nucleus, and the higher lying one may have a neutron decay width that is much narrower than the one expected for an s(1/2) level at the same resonance energy. The structure of some Omega(pi) = 1/2(+) one-particle resonant levels, which are smoothly connected to weakly bound one-particle levels as the potential strength becomes stronger, is also analyzed using the present formalism.},
  author       = {Hamamoto-Kuroda, Ikuko},
  issn         = {0556-2813},
  language     = {eng},
  number       = {5},
  pages        = {6--054311},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {Neutron decay width of one-particle resonant levels in deformed nuclei},
  url          = {http://dx.doi.org/10.1103/PhysRevC.77.054311},
  volume       = {77},
  year         = {2008},
}