First observation of the decay of a 15- seniority v=4 isomer in 128Sn

被引：31

作者：

Pietri, S. ^{[2
]}

Jungclaus, A. ^{[1
]}

Gorska, M. ^{[2
]}

Grawe, H. ^{[2
]}

Pfuetzner, M. ^{[3
]}

Caceres, L. ^{[2
,4
]}

Detistov, P. ^{[5
]}

Lalkovski, S. ^{[5
]}

Modamio, V. ^{[1
,4
]}

Podolyak, Z. ^{[6
]}

Regan, P. H. ^{[6
]}

Rudolph, D. ^{[7
]}

Walker, J. ^{[1
,4
]}

Werner-Malento, E. ^{[3
]}

Bednarczyk, P. ^{[8
]}

Doornenbal, P. ^{[2
]}

Geissel, H. ^{[2
]}

Gerl, J. ^{[2
]}

Grebosz, J. ^{[8
]}

Kojouharov, I. ^{[2
]}

Kurz, N. ^{[2
]}

Prokopowicz, W. ^{[2
]}

Schaffner, H. ^{[2
]}

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

Andgren, K. ^{[9
]}

Benlliure, J. ^{[10
]}

Benzoni, G. ^{[11
]}

Bruce, A. M. ^{[12
]}

Casarejos, E. ^{[10
]}

Cederwall, B. ^{[9
]}

Crespi, F. C. L. ^{[11
]}

Hadinia, B. ^{[9
]}

Hellstrom, M. ^{[7
]}

Hoischen, R. ^{[2
,7
]}

Ilie, G. ^{[13
]}

Khaplanov, A. ^{[9
]}

Kmiecik, M. ^{[8
]}

Kumar, R. ^{[14
]}

Maj, A. ^{[8
]}

Mandal, S. ^{[15
]}

Montes, F. ^{[2
]}

Myalski, S. ^{[8
]}

Simpson, G. ^{[16
]}

Steer, S. J. ^{[6
]}

Tashenov, S. ^{[2
]}

Wieland, O. ^{[11
]}

机构：

[1] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[2] Gesell Schwerionenforsch GSI, D-64291 Darmstadt, Germany

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

[4] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain

[5] Univ Sofia, Fac Phys, BG-1164 Sofia, Bulgaria

[6] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[7] Lund Univ, Dept Phys, S-22100 Lund, Sweden

[8] Henryk Niewodniczaski Inst Nucl Phys, PL-31342 Krakow, Poland

[9] KTH Stockholm, S-10691 Stockholm, Sweden

[10] Univ Santiago de Compostela, E-175706 Santiago De Compostela, Spain

[11] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[12] Univ Brighton, Sch Engn, Brighton BN2 4GJ, E Sussex, England

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

[14] Inter Univ Accelerator Ctr, New Delhi, India

[15] Univ Delhi, New Delhi, India

[16] Inst Laue Langevin, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW C | 2011年 / 83卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

TRANSITION-PROBABILITIES; YRAST ISOMERS;

D O I：

10.1103/PhysRevC.83.044328

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：

Isomeric states in the semimagic Sn128-130 isotopes were populated in the fragmentation of a Xe-136 beam on a Be-9 target at an energy of 750 A.MeV. The decay of an isomeric state in Sn-128 at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T-1/2 = 220(30) ns from the time distributions of the delayed gamma rays emitted in its decay. gamma gamma coincidence relations were analyzed in order to establish the decay pattern of the newly established state toward the known (7(-)) and (10(+)) isomers at excitation energies of 2092 and 2492 keV, respectively. Based on a comparison with results of state-of-the-art shell-model calculations the new isomeric state is proposed to have the nu h(11/2)(-3)d(3/2)(-1) configuration with the four neutron holes in Sn-132 maximally aligned to a total spin of I-pi = 15(-).

引用

页数：6

共 21 条

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