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Possible presence and properties of multi-chiral-pair bands in odd-odd nuclei with the same intrinsic configuration

Hamamoto-Kuroda, Ikuko LU (2013) In Physical Review C (Nuclear Physics) 88(2).
Abstract
Applying a relatively simple particle-rotor model to odd-odd nuclei, the possible presence of multi-chiral-pair bands is looked for, where chiral-pair bands are defined not only by near degeneracy of the levels of two bands but also by similar expectation values of squared components of three angular momenta that define chirality. In the angular-momentum region where two pairs of chiral-pair bands are obtained, the possible interband M1/E2 decay from the second-lowest chiral-pair bands to the lowest chiral-pair bands is studied, with the intention of finding how to experimentally identify the multi-chiral-pair bands. It is found that up until almost the bandhead the intraband M1/E2 decay within the second chiral-pair bands is preferred... (More)
Applying a relatively simple particle-rotor model to odd-odd nuclei, the possible presence of multi-chiral-pair bands is looked for, where chiral-pair bands are defined not only by near degeneracy of the levels of two bands but also by similar expectation values of squared components of three angular momenta that define chirality. In the angular-momentum region where two pairs of chiral-pair bands are obtained, the possible interband M1/E2 decay from the second-lowest chiral-pair bands to the lowest chiral-pair bands is studied, with the intention of finding how to experimentally identify the multi-chiral-pair bands. It is found that up until almost the bandhead the intraband M1/E2 decay within the second chiral-pair bands is preferred rather than the interband M1/E2 decay to the lowest chiral-pair bands, though the decay possibility depends on the ratio of actual decay energies. It is also found that chiral-pair bands in our model and definition are hardly obtained for gamma values outside the range 25 degrees < gamma < 35 degrees, although either a near-degeneracy or a constant energy difference of several hundred keV between the two levels for a given angular momentum I in "a pair bands" is sometimes obtained in some limited region of I. In the present model calculations the energy difference between chiral-pair bands is always one or two orders of magnitude smaller than a few hundred keV, and no chiral-pair bands are obtained, which have an almost constant energy difference of the order of a few hundred keV in a reasonable range of I. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C (Nuclear Physics)
volume
88
issue
2
publisher
American Physical Society
external identifiers
  • wos:000323712600005
  • scopus:84884235810
ISSN
0556-2813
DOI
10.1103/PhysRevC.88.024327
language
English
LU publication?
yes
id
388d26a7-bcd8-4d64-b552-c95a555c5561 (old id 4062889)
date added to LUP
2013-10-18 13:29:17
date last changed
2019-09-17 02:46:50
@article{388d26a7-bcd8-4d64-b552-c95a555c5561,
  abstract     = {Applying a relatively simple particle-rotor model to odd-odd nuclei, the possible presence of multi-chiral-pair bands is looked for, where chiral-pair bands are defined not only by near degeneracy of the levels of two bands but also by similar expectation values of squared components of three angular momenta that define chirality. In the angular-momentum region where two pairs of chiral-pair bands are obtained, the possible interband M1/E2 decay from the second-lowest chiral-pair bands to the lowest chiral-pair bands is studied, with the intention of finding how to experimentally identify the multi-chiral-pair bands. It is found that up until almost the bandhead the intraband M1/E2 decay within the second chiral-pair bands is preferred rather than the interband M1/E2 decay to the lowest chiral-pair bands, though the decay possibility depends on the ratio of actual decay energies. It is also found that chiral-pair bands in our model and definition are hardly obtained for gamma values outside the range 25 degrees &lt; gamma &lt; 35 degrees, although either a near-degeneracy or a constant energy difference of several hundred keV between the two levels for a given angular momentum I in "a pair bands" is sometimes obtained in some limited region of I. In the present model calculations the energy difference between chiral-pair bands is always one or two orders of magnitude smaller than a few hundred keV, and no chiral-pair bands are obtained, which have an almost constant energy difference of the order of a few hundred keV in a reasonable range of I.},
  articleno    = {024327},
  author       = {Hamamoto-Kuroda, Ikuko},
  issn         = {0556-2813},
  language     = {eng},
  number       = {2},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {Possible presence and properties of multi-chiral-pair bands in odd-odd nuclei with the same intrinsic configuration},
  url          = {http://dx.doi.org/10.1103/PhysRevC.88.024327},
  volume       = {88},
  year         = {2013},
}