Isomers in Fission Fragments

被引：0

作者：

Urban, W. ^{[1
]}

Faust, H. ^{[1
]}

Jentschel, M. ^{[1
]}

Koester, U. ^{[1
]}

Kremepel, J. ^{[1
]}

Materna, Th. ^{[1
]}

Mutti, P. ^{[1
]}

Soldner, T. ^{[1
]}

Genevey, J. ^{[2
]}

Pinston, J. A. ^{[2
]}

Simpson, G. ^{[2
]}

Rzaca-Urban, T. ^{[3
]}

Zlomaniec, A. ^{[3
]}

Lukasiewicz, M. ^{[3
]}

Sieja, K. ^{[4
]}

Nowacki, F. ^{[5
]}

Dorvaux, O. ^{[5
]}

Gall, B. J. P. ^{[5
]}

Roux, B. ^{[5
]}

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

Durell, J. L. ^{[6
]}

Smith, A. G. ^{[6
]}

Varley, B. J. ^{[6
]}

Tsekhanovich, I. ^{[6
]}

Jolie, J. ^{[7
]}

Linnemann, A. ^{[7
]}

Scherillo, A. ^{[8
]}

Orlandi, R. ^{[9
]}

Smith, J. F. ^{[9
]}

Ahmad, I. ^{[10
]}

机构：

[1] Inst Max Von Laue Paul Langevin, BP 156, F-38042 Grenoble 9, France

[2] Univ Grenoble 1, CNRS, IN2P3, F-38026 St Martin Dheres, France

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

[4] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany

[5] Inst Pluridisciplinaire, F-67037 Strasbourg, France

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

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

[8] Rutherford Appleton Lab, Didcot, Oxon OX11 0QX, England

[9] Univ West Scotland, Paisley PA1 2BE, Renfrew, Scotland

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

来源：

CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS | 2009年 / 1090卷

关键词：

Fission Fragments; Isomers; Nuclear Structure; Neutron-rich Nuclei; Nuclear Deformation; HIGH-FLUX REACTOR; NEUTRON-RICH; SHAPE COEXISTENCE; DEFORMATION; NUCLEI; STATES; SR;

D O I：

暂无

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structure of neutron-rich nuclei produced as secondary fission fragments was investigated using the EUROGAM and GAMMASPHERE ACS arrays, the LOHENGRIN fission-fragment mass separator and the FIR fission-fragment identifier. Fission products were populated in spontaneous fission of Cm-248 and Cf-252 and in thermal neutron-induced fission of U-233, U-235 and Pu-241 at ILL Grenoble. Particularly useful in such studies are isomeric states, well populated in fission due to their yrast character, easy to detect due to their long half lives and easy to interpret because of their relatively simple composition. We discuss their role in studies of neutron-rich nuclei, giving examples of isomers found in our recent experiments. A special type of K-isomers, resulting from 'crossing' of extruder and intruder orbitals plays a role in the mechanism of a sudden onset of deformation in the A=100 and A=150 regions. We present evidence for these isomers in both regions. Possible further studies in this field are proposed.

引用

页码：494 / +

页数：3

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