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13th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics Cologne, GERMANY, AUG 25-29, 2008, Date: 2008/08/25 - 2008/08/29, Location: GERMANY, Univ Cologne, Inst Nucl Phys, Cologne

Publication date: 2009-01-01
Volume: 1090 Pages: 164 - 168
ISSN: 978-0-7354-0623-0
Publisher: Amer inst physics; 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA

Capture gamma-ray spectroscopy and related topics

Author:

Lozeva, Radomira
Simpson, Gary ; Neyens, Gerda ; Grawe, Hubert ; Balabanski, Dimiter ; Blazhev, A ; Jolie, J ; Warr, N ; Zilges, A

Keywords:

isomer decay, lifetimes, gamma transitions and level energies, shell model, transition-probabilities, energy-levels, 132Sn region, Science & Technology, Physical Sciences, Technology, Physics, Applied, Spectroscopy, Physics, Isomer decay, Lifetimes, Gamma transitions and level energies, Shell model, TRANSITION-PROBABILITIES, ENERGY-LEVELS, NUCLEI, EXCITATIONS, DECAY

Abstract:

The neutron orbitals h(11/2), d(3/2), s(1/2), determine the structure of the abundant yrast traps in the neutron-rich Sn isotopes close to Sn-132. In Sn-125,Sn-127,Sn-129 the high-spin members of the nu(d(3/2)(-1)h(11/2)(-2)) and nu(h(11/2)(-n)), seniority nu=3, multiplets form isomeric (23/2(+)) [1,2] and (27/2(-)) [2] states which were recently observed in relativistic fission of U-238 and fragmentation of Xe-136 at the RISING setup at GS1. These rather pure states and the mixed 19/2(+) isomers with a dominant nu(s(1/2)(-1)h(11/2)(-2)) configuration [3] are discussed. First evidence for a new isomer in Sn-128 with nu(d(3/2)(-1)h(11/2)(-3)) configuration analogue to the isotone Te-130 [4] is presented.