Unexpected 5/2- spin of the ground state in 147Ba: No octupole deformation in ground states of odd-A Ba isotopes

被引：25

作者：

Rzaca-Urban, T. ^{[1
]}

Urban, W. ^{[1
,2
]}

Smith, A. G. ^{[3
]}

Ahmad, I. ^{[4
]}

Syntfeld-Kazuch, A. ^{[5
]}

机构：

[1] Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland

[2] Inst Laue Langevin, F-38042 Grenoble 9, France

[3] Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England

[4] Argonne Natl Lab, Argonne, IL 60439 USA

[5] Natl Ctr Nucl Res, Radiat Detectors Div, PL-05400 Otwock, Poland

来源：

PHYSICAL REVIEW C | 2013年 / 87卷 / 03期

关键词：

NUCLEAR-DATA SHEETS; NEUTRON-RICH; GAMMA-RAYS; FISSION; SHAPES; SN-132;

D O I：

10.1103/PhysRevC.87.031305

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The Ba-147 nucleus has been studied in prompt gamma-ray spectroscopy using the EUROGAM2 Ge array. Spin and parity of the ground state has been determined to be 5/2(-). The unexpected, 5/2(-) ground state results from interaction with other negative-parity configurations. A new ground-state band has been established in Ba-147 and some previously reported levels have been arranged into a 3/2(-) band, which may correspond to the 3/2(-)[532] configuration. The new spin assignments in Ba-147 suggest that the theoretical predictions of static octupole deformation in the ground state of Ba-147 may not be be valid. No candidates for parity doublets have been found in Ba-147. Instead, an octupole band built on the ground state has been proposed. DOI: 10.1103/PhysRevC.87.031305

引用

页数：5

共 27 条

[1] OCTUPOLE SHAPES IN NUCLEI [J].

AHMAD, I ;

BUTLER, PA .

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, 1993, 43 :71-116

[2] GAMMA-RAYS FROM FISSION FRAGMENTS [J].

AHMAD, I ;

PHILLIPS, WR .

REPORTS ON PROGRESS IN PHYSICS, 1995, 58 (11) :1415-1463

[3] Identification of gamma transitions in Ba-147, Ce-149, and Nd-151,Nd-153 [J].

Babu, BRS ;

Zhu, SJ ;

Ramayya, AV ;

Hamilton, JH ;

Peker, LK ;

Wang, MG ;

Ginter, TN ;

Kormicki, J ;

Ma, WC ;

Cole, JD ;

Aryaeinejad, R ;

ButlerMoore, K ;

Dardenne, YX ;

Drigert, MW ;

TerAkopian, GM ;

Oganessian, YT ;

Rasmussen, JO ;

Asztalos, S ;

Lee, LY ;

Macchiavelli, AO ;

Chu, SY ;

Gregorich, KE ;

Mohar, MF ;

Prussin, S ;

Stoyer, MA ;

Lougheed, RW ;

Moody, KJ ;

Wild, JF .

PHYSICAL REVIEW C, 1996, 54 (02) :568-571

[4] INTRINSIC DIPOLE-MOMENTS IN REFLECTION-ASYMMETRIC NUCLEI [J].

BUTLER, PA ;

NAZAREWICZ, W .

NUCLEAR PHYSICS A, 1991, 533 (02) :249-268

[5]

Casten R F., 1990, Nuclear Structure from a Simple Perspective

[6]

Chen YJ, 2005, CHINESE PHYS LETT, V22, P1362, DOI 10.1088/0256-307X/22/6/018

[7] Nuclear data sheets for A=153 [J].

Helmer, RG .

NUCLEAR DATA SHEETS, 2006, 107 (03) :507-+

[8] Nuclear data sheets for A=157 [J].

Helmer, RG .

NUCLEAR DATA SHEETS, 2004, 103 (04) :565-+

[9] Parities and multipolarities of gamma rays in neutron-rich odd-mass Ba nuclei [J].

Jones, MA ;

Urban, W ;

Durell, JL ;

Leddy, M ;

Phillips, WR ;

Smith, AG ;

Varley, BJ ;

Ahmad, I ;

Morss, LR ;

Bentaleb, M ;

Lubkiewicz, E ;

Schulz, N .

NUCLEAR PHYSICS A, 1996, 605 (02) :133-159

[10] Evaluation of theoretical conversion coefficients using BrIcc [J].

Kibedi, T. ;

Burrows, T. W. ;

Trzhaskovskaya, M. B. ;

Davidson, P. M. ;

Nestor, C. W., Jr. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2008, 589 (02) :202-229

← 1 2 3 →