Evolution of chirality from γ Soft 108Ru to triaxial 110,112Ru

被引：62

作者：

Luo, Y. X. ^{[1
,2
]}

Zhu, S. J. ^{[1
,3
]}

Hamilton, J. H. ^{[1
]}

Rasmussen, J. O. ^{[2
]}

Ramayya, A. V. ^{[1
]}

Goodin, C. ^{[1
]}

Li, K. ^{[1
]}

Hwang, J. K. ^{[1
]}

Almehed, D. ^{[4
]}

Frauendorf, S. ^{[4
,5
]}

Dimitrov, V. ^{[6
]}

Zhang, Jing-ye ^{[7
]}

Che, X. L. ^{[3
]}

Jang, Z. ^{[3
]}

Stefanescu, I. ^{[8
]}

Gelberg, A. ^{[9
]}

Ter-Akopian, G. M. ^{[10
]}

Daniel, A. V. ^{[10
]}

Stoyer, M. A. ^{[11
]}

Donangelo, R. ^{[12
]}

Cole, J. D. ^{[13
]}

Stone, N. J. ^{[7
,14
]}

机构：

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

[2] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

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

[4] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[5] FZD Rossendorf, Inst Strahlenphys, D-01314 Dresden, Germany

[6] Idaho State Univ, Idaho Accelerator Ctr, Pocatello, ID 83209 USA

[7] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[8] PKU Leuven, Inst Kern Stralingsfys, B-3001 Louvain, Belgium

[9] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[10] Joint Inst Nucl Res, Dubna 141980, Russia

[11] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[12] Univ Fed Rio de Janeiro, BR-68528 Rio De Janeiro, Brazil

[13] Idaho Natl Lab, Idaho Falls, ID 83415 USA

[14] Univ Oxford, Dept Phys, Oxford OX1 3PU, England

来源：

PHYSICS LETTERS B | 2009年 / 670卷 / 4-5期

关键词：

Chiral vibration; Ru-108; Ru-110; Ru-112; Spontaneous fission of Cf-252; ISOTOPES; SPECTROSCOPY; VIBRATIONS; FISSION; NUCLEI; BANDS;

D O I：

10.1016/j.physletb.2008.10.067

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Rotational bands in Ru-108,Ru-110,Ru-112 have been investigated by means of gamma-gamma-gamma and gamma-gamma(theta) coincidences of prompt gamma rays emitted in the spontaneous fission of Cf-252. The positive parity bands are described by different versions of IBA, where Ru-108 is best described as a gamma-soft nucleus whereas Ru-110,Ru-112 these are more like rigid triaxial rotors. New Delta I = 1 negative parity doublet bands are found. In case of Ru-110,Ru-112, these are interpreted as soft chiral vibrations. Many of the experimental findings can be explained by microscopic calculations that combine the TAC mean-field with random phase approximation but a simple geometrical explanation is not apparent. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：307 / 312

页数：6

共 28 条

[1]

ALMEHED D, PHYS REV C IN PRESS

[2]

ALMEHED D, UNPUB

[3]

BARRANGER M, 1968, NUCL PHYS A, V110, P490

[4] Technique for measuring angular correlations and g-factors of excited states with large multi-detector arrays:: An application to neutron rich nuclei produced by the spontaneous fission of 252Cf [J].

Daniel, A. V. ;

Goodin, C. ;

Li, K. ;

Ramayya, A. V. ;

Stone, N. J. ;

Hwang, Jx. ;

Hamilton, J. H. ;

Stone, J. R. ;

Luo, Yx ;

Rasmussen, J. O. ;

Stoyer, M. A. ;

Zhu, S. J. ;

Ter-Akopian, G. M. ;

Lee, I. Y. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2007, 262 (02) :399-406

[5]

Dimitrov V, 2003, PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE FISSION AND PROPERTIES OF NEUTRON-RICH NUCLEI, P93

[6] Tilted rotation of triaxial nuclei [J].

Frauendorf, S ;

Meng, J .

NUCLEAR PHYSICS A, 1997, 617 (02) :131-147

[7] Description of multi-quasiparticle bands by the tilted axis cranking model [J].

Frauendorf, S .

NUCLEAR PHYSICS A, 2000, 677 :115-170

[8]

GAODNER E, 2000, PHYS REV LETT, V97

[9] Effect of γ softness on the stability of chiral geometry:: Spectroscopy of 106Ag [J].

Joshi, P. ;

Carpenter, M. P. ;

Fossan, D. B. ;

Koike, T. ;

Paul, E. S. ;

Rainovski, G. ;

Starosta, K. ;

Vaman, C. ;

Wadsworth, R. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

[10] First evidence for chirality in Tc isotopes:: Spectroscopy of 100Tc [J].

Joshi, P ;

Wilkinson, AR ;

Koike, T ;

Fossan, DB ;

Finnigan, S ;

Paul, ES ;

Raddon, PM ;

Rainovski, G ;

Starosta, K ;

Simons, AJ ;

Vaman, C ;

Wadsworth, R .

EUROPEAN PHYSICAL JOURNAL A, 2005, 24 (01) :23-29

← 1 2 3 →