Characterization of octupole-type structures inTh221 | Zendy

W. Reviol | Zendy; R. V. F. Janssens | Zendy; S. Frauendorf | Zendy; D. G. Sarantites | Zendy; M. P. Carpenter | Zendy; X. Chen | Zendy; C. J. Chiara | Zendy; D. J. Hartley | Zendy; K. Hauschild | Zendy; T. Lauritsen | Zendy; А. Лопез-Мартенс | Zendy; M. Esther Sanz Montero | Zendy; O. L. Pechenaya | Zendy; D. Seweryniak | Zendy; J. Snyder | Zendy; S. Zhu | Zendy

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Characterization of octupole-type structures inTh221

Author(s) -

W. Reviol,

R. V. F. Janssens,

S. Frauendorf,

D. G. Sarantites,

M. P. Carpenter,

X. Chen,

C. J. Chiara,

D. J. Hartley,

K. Hauschild,

T. Lauritsen,

А. Лопез-Мартенс,

M. Esther Sanz Montero,

O. L. Pechenaya,

D. Seweryniak,

J. Snyder,

S. Zhu

Publication year - 2014

Publication title -

physical review c

Language(s) - English

Resource type - Journals

eISSN - 1089-490X

pISSN - 0556-2813

DOI - 10.1103/physrevc.90.044318

Subject(s) - yrast , gammasphere , physics , parity (physics) , atomic physics , type (biology) , crystallography , excited state , chemistry , ecology , biology

International audienceA detailed level scheme for Th-221 has been established in an experiment using the O-18 + Pb-207 reaction at 96 MeV. The evaporation residues from this fissile system were selected with the HERCULES detector array and residue-gated gamma rays were measured with Gammasphere. Three band structures of interlinked, alternating-parity levels are observed, two of which are non-yrast. In addition, several high-lying excitations are found. The yrast band is seen up to spin-parity 37/2(-) and 39/2(+), beyond which a high-spin feeding transition is observed. The non-yrast sequences are interpreted as parity-doublet structures, based on a configuration similar to that of the yrast band in Th-223 (K = 5/2). The key properties of even-odd nuclei in this mass region [B(E1)/B(E2) and B(M1)/B(E2) ratios, spin alignments, parity splittings] are reviewed

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