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Enhanced E1 transition between weakly-bound excited states in the nucleus Ne 27

Hamamoto, Ikuko LU (2019) In Physical Review C 100(1).
Abstract

Inspired by the recently-reported strong electric-dipole (E1) transition between the weakly-bound first and second excited states, 3/2- at 765 keV and 1/2+ at 885 keV, in the nucleus Ne171027, the E1 transition is estimated in a model by properly taking into account the effect of both deformation and weakly-bound neutrons. In addition to both the spin-parities, 1/2+ and 3/2-, and observed nearly degenerate energies of the two excited states, the observed order of magnitude of the E1 transition strength between the two states is very naturally explained in the case that these two excited states are prolately deformed, in terms of the transitions between the halo components of the wave functions of the weakly-bound odd-neutrons, s1/2→p3/2... (More)

Inspired by the recently-reported strong electric-dipole (E1) transition between the weakly-bound first and second excited states, 3/2- at 765 keV and 1/2+ at 885 keV, in the nucleus Ne171027, the E1 transition is estimated in a model by properly taking into account the effect of both deformation and weakly-bound neutrons. In addition to both the spin-parities, 1/2+ and 3/2-, and observed nearly degenerate energies of the two excited states, the observed order of magnitude of the E1 transition strength between the two states is very naturally explained in the case that these two excited states are prolately deformed, in terms of the transitions between the halo components of the wave functions of the weakly-bound odd-neutrons, s1/2→p3/2 and s1/2→p1/2, in addition to the large probability of the p3/2 component in the weakly-bound neutron [330 1/2] orbit. The large probability is the result of the shell-structure unique in weakly-bound or resonant neutrons.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
100
issue
1
publisher
American Physical Society
external identifiers
  • scopus:85069924740
ISSN
2469-9985
DOI
10.1103/PhysRevC.100.014324
language
English
LU publication?
yes
id
5080472e-7590-4094-b5c6-bf5df6e228cd
date added to LUP
2019-08-28 16:41:09
date last changed
2019-09-04 04:49:13
@article{5080472e-7590-4094-b5c6-bf5df6e228cd,
  abstract     = {<p>Inspired by the recently-reported strong electric-dipole (E1) transition between the weakly-bound first and second excited states, 3/2- at 765 keV and 1/2+ at 885 keV, in the nucleus Ne171027, the E1 transition is estimated in a model by properly taking into account the effect of both deformation and weakly-bound neutrons. In addition to both the spin-parities, 1/2+ and 3/2-, and observed nearly degenerate energies of the two excited states, the observed order of magnitude of the E1 transition strength between the two states is very naturally explained in the case that these two excited states are prolately deformed, in terms of the transitions between the halo components of the wave functions of the weakly-bound odd-neutrons, s1/2→p3/2 and s1/2→p1/2, in addition to the large probability of the p3/2 component in the weakly-bound neutron [330 1/2] orbit. The large probability is the result of the shell-structure unique in weakly-bound or resonant neutrons.</p>},
  articleno    = {014324},
  author       = {Hamamoto, Ikuko},
  issn         = {2469-9985},
  language     = {eng},
  month        = {07},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {Physical Review C},
  title        = {Enhanced E1 transition between weakly-bound excited states in the nucleus Ne 27},
  url          = {http://dx.doi.org/10.1103/PhysRevC.100.014324},
  volume       = {100},
  year         = {2019},
}