Isomers in neutron-rich A ≈ 190 nuclides from 208Pb fragmentation

被引：0
|
作者：
M. Caama no
P. M. Walker
P. H. Regan
M. Pfützner
Zs. Podolyák
J. Gerl
M. Hellström
P. Mayet
M. N. Mineva
A. Aprahamian
J. Benlliure
A. M. Bruce
P. A. Butler
D. Cortina Gil
D. M. Cullen
J. Döring
T. Enqvist
C. Fox
J. Garcés Narro
H. Geissel
W. Gelletly
J. Giovinazzo
M. Górska
H. Grawe
R. Grzywacz
A. Kleinböhl
W. Korten
M. Lewitowicz
R. Lucas
H. Mach
C. D. O’Leary
F. De Oliveira
C. J. Pearson
F. Rejmund
M. Rejmund
M. Sawicka
H. Schaffner
C. Schlegel
K. Schmidt
K. -H. Schmidt
P. D. Stevenson
Ch. Theisen
F. Vivès
D. D. Warner
C. Wheldon
H. J. Wollersheim
S. Wooding
F. Xu
O. Yordanov
机构：
[1] University of Surrey,Department of Physics
[2] TRIUMF,Wright Nuclear Structure Laboratory
[3] Yale University,Institute of Experimental Physics
[4] Warsaw University,Division of Nuclear Physics
[5] GSI,IKS
[6] Lund University,Department of Physics
[7] KU Leuven,Departamento de Fısica de Partıculas
[8] University of Notre Dame,School of Engineering
[9] University of Santiago de Compostela,Oliver Lodge Laboratory
[10] University of Brighton,Schuster Laboratory
[11] University of Liverpool,Department of Physics
[12] University of Manchester,TUNL
[13] University of Jyväskylä,Department of Physics and Astronomy
[14] Duke University,CEA Saclay
[15] CEN Bordeaux-Gradignan/CNRS,Department of Radiation Sciences
[16] University of Tennessee,Department of Technical Physics
[17] DSM/DAPNIA/SPhN,undefined
[18] GANIL,undefined
[19] Uppsala University,undefined
[20] IPN,undefined
[21] CLRC Daresbury Laboratory,undefined
[22] Peking University,undefined
来源：
The European Physical Journal A - Hadrons and Nuclei | 2005年 / 23卷
关键词：
21.10.Tg Lifetimes; 23.20.Lv γ transitions and level energies; 25.70.Mn Projectile and target fragmentation;
D O I：
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中图分类号：
学科分类号：
摘要：
Relativistic projectile fragmentation of 208Pb has been used to produce isomers in neutron-rich, A ≈ 190 nuclides. A forward-focusing spectrometer provided ion-by-ion mass and charge identification. The detection of γ-rays emitted by stopped ions has led to the assignment of isomers in 188Ta, 190W, 192Re, 193Re, 195Os, 197Ir, 198Ir, 200Pt, 201Pt, 202Pt and 203Au, with half-lives ranging from approximately 10 ns to 1 ms. Tentative isomer information has been found also for 174Er, 175Er, 185Hf, 191Re, 194Re and 199Ir. In most cases, time-correlated, singles γ-ray events provided the first spectroscopic data on excited states for each nuclide. In 200Pt and 201Pt, the assignments are supported by γ-γ coincidences. Isomeric ratios provide additional information, such as half-life and transition energy constraints in particular cases. The level structures of the platinum isotopes are discussed, and comparisons are made with isomer systematics.
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页码：201 / 215
页数：14
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