High-spin structure and multiphonon γ vibrations in very neutron-rich 114Ru

被引：15

作者：

Yeoh, E. Y. ^{[1
]}

Zhu, S. J. ^{[1
,2
]}

Hamilton, J. H. ^{[2
]}

Li, K. ^{[2
]}

Ramayya, A. V. ^{[2
]}

Liu, Y. X. ^{[3
]}

Hwang, J. K. ^{[2
]}

Liu, S. H. ^{[2
,4
]}

Wang, J. G. ^{[1
]}

Sun, Y. ^{[5
]}

Sheikh, J. A. ^{[6
]}

Bhat, G. H. ^{[6
]}

Luo, Y. X. ^{[2
,7
]}

Rasmussen, J. O. ^{[7
]}

Lee, I. Y. ^{[7
]}

Ding, H. B. ^{[1
]}

Gu, L. ^{[1
]}

Xu, Q. ^{[1
]}

Xiao, Z. G. ^{[1
]}

Ma, W. C. ^{[8
]}

机构：

[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[2] Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA

[3] Huzhou Teachers Coll, Sch Sci, Huzhou 313000, Peoples R China

[4] UNIRIB Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA

[5] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China

[6] Univ Kashmir, Dept Phys, Srinagar 190006, Jammu & Kashmir, India

[7] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[8] Mississippi State Univ, Dept Phys, Mississippi State, MS 39762 USA

来源：

PHYSICAL REVIEW C | 2011年 / 83卷 / 05期

基金：

中国国家自然科学基金;

关键词：

PROJECTED SHELL-MODEL; IDENTICAL BANDS; PARITY BANDS; NUCLEI; STATES;

D O I：

10.1103/PhysRevC.83.054317

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：

High-spin levels of the neutron-rich Ru-114 have been investigated by measuring the prompt. rays in the spontaneous fission of Cf-252. The ground-state band and one-phonon gamma-vibrational band have been extended up to 14(+) and 9(+), respectively. Two levels are proposed as the members of a two-phonon gamma-vibrational band. A back bending (band crossing) has been observed in the ground-state band at (h) over bar omega approximate to 0.40 MeV. Using the triaxial deformation parameters, the cranked shell model calculations indicate that this back bending in Ru-114 should originate from the alignment of a pair of h(11/2) neutrons. Triaxial projected shell model calculations for the gamma-vibrational band structures of Ru-114 are in good agreement with the experimental data. However, when using the oblate deformation parameters, both of the above-calculated results are not in agreement with the experimental data.

引用

页数：6

共 28 条

[1] QUASI-PARTICLE SPECTRA NEAR THE YRAST LINE [J].

BENGTSSON, R ;

FRAUENDORF, S .

NUCLEAR PHYSICS A, 1979, 327 (01) :139-171

[2] ROTATIONAL BANDS AND PARTICLE-HOLE EXCITATIONS AT VERY HIGH-SPIN [J].

BENGTSSON, T ;

RAGNARSSON, I .

NUCLEAR PHYSICS A, 1985, 436 (01) :14-82

[3] High spin band structure in112Ru [J].

Department of Physics, Tsinghua University, Beijing 100084, China ;

不详 ;

不详 .

Chin. Phys. Lett., 2006, 2 (328-331) :328-331

[4] High-spin structure in neutron-rich 108Ru nucleus [J].

Che, XL ;

Zhu, SJ ;

Hamilton, JH ;

Ramayya, AV ;

Hwang, JK ;

Yong-Nam, U ;

Li, ML ;

Zheng, RC ;

Lee, IY ;

Rasmussen, JO ;

Luo, YX ;

Ma, WC .

CHINESE PHYSICS LETTERS, 2004, 21 (10) :1904-1907

[5] ROTATIONAL STATES IN EVEN ATOMIC NUCLEI [J].

DAVYDOV, AS ;

FILIPPOV, GF .

NUCLEAR PHYSICS, 1958, 8 (03) :237-249

[6] Ru-114 in axial and nonaxial microscopic frameworks [J].

Devi, R ;

Khosa, SK .

PHYSICAL REVIEW C, 1996, 54 (04) :1661-1664

[7] Shape evolutions in the neutron-rich Ru isotopes [J].

Faisal, J. Q. ;

Hua, H. ;

Li, X. Q. ;

Shi, Y. ;

Xu, F. R. ;

Liu, H. L. ;

Ye, Y. L. ;

Jiang, D. X. .

PHYSICAL REVIEW C, 2010, 82 (01)

[8] TRIAXIAL SHAPES OF ROTATING NUCLEI WITH NEUTRON NUMBER-88, NUMBER-89, NUMBER-90 [J].

FRAUENDORF, S ;

MAY, FR .

PHYSICS LETTERS B, 1983, 125 (04) :245-250

[9] MAGNETIC-MOMENTS IN THE BACKBENDING REGION [J].

FRAUENDORF, S .

PHYSICS LETTERS B, 1981, 100 (03) :219-222

[10] HARMONIC 2-PHONON GAMMA-VIBRATIONAL STATE IN NEUTRON-RICH MO-106 [J].

GUESSOUS, A ;

SCHULZ, N ;

PHILLIPS, WR ;

AHMAD, I ;

BENTALEB, M ;

DURELL, JL ;

JONES, MA ;

LEDDY, M ;

LUBKIEWICZ, E ;

MORSS, LR ;

PIEPENBRING, R ;

SMITH, AG ;

URBAN, W ;

VARLEY, BJ .

PHYSICAL REVIEW LETTERS, 1995, 75 (12) :2280-2283

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