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Titolo:
OBSERVATION OF THE I-SOFT NUCLEUS BA-134( SCISSORS MODE IN THE GAMMA)
Autore:
MASER H; PIETRALLA N; VONBRENTANO P; HERZBERG RD; KNEISSL U; MARGRAF J; PITZ HH; ZILGES A;
Indirizzi:
UNIV STUTTGART,INST STRAHLENPHYS D-70569 STUTTGART GERMANY UNIV COLOGNE,INST KERNPHYS D-50937 COLOGNE GERMANY YALE UNIV,WRIGHT NUCL STRUCT LAB NEW HAVEN CT 06520
Titolo Testata:
Physical review. C. Nuclear physics
fascicolo: 5, volume: 54, anno: 1996,
pagine: 2129 - 2133
SICI:
0556-2813(1996)54:5<2129:OOTINB>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERACTING BOSON MODEL; MIXED-SYMMETRY STATES; MAGNETIC DIPOLE STRENGTH; M1 TRANSITION STRENGTHS; HEAVY DEFORMED-NUCLEI; COLLECTIVE 1+ STATES; RARE-EARTH NUCLEI; LOW-LYING M1; ACTINIDE NUCLEI; DEFORMATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
49
Recensione:
Indirizzi per estratti:
Citazione:
H. Maser et al., "OBSERVATION OF THE I-SOFT NUCLEUS BA-134( SCISSORS MODE IN THE GAMMA)", Physical review. C. Nuclear physics, 54(5), 1996, pp. 2129-2133

Abstract

A photon scattering experiment was performed on the gamma-soft nucleus Ba-134 with photon energies of E(gamma)<4.1. Around 3 MeV excitationenergy a fragmented 1(+) scissors mode as well as the (2(+) x 3(-))(1-) two-phonon dipole state were identified. The dipole excitation strengths were measured. The excitation strength of the scissors mode in this gamma-soft nucleus is well reproduced by an empirical M1 sum rule that generalizes the ''delta(2) law'' to nuclei without axial symmetry. The IBM-2 describes the mixed-symmetry slates in Ba-134 and their decay pattern. A large E2/M1 mixing ratio for the 1(+) --> 2(1)(+) decayof the scissors mode to the 2(1)(+) state is predicted by the IBM-2. The new result from Ba-134 together with a similar previous observation in Pt-196 corroborates the scissors made as a typical excitation mode of gamma-soft nuclei.

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Documento generato il 01/12/20 alle ore 13:25:39