Increased isomeric lifetime of hydrogen-like 192mOs

被引：21

作者：

Akber, A. ^{[1
]}

Reed, M. W. ^{[1
]}

Walker, P. M. ^{[2
]}

Litvinov, Yu. A. ^{[3
,4
]}

Lane, G. J. ^{[1
]}

Kibedi, T. ^{[1
]}

Blaum, K. ^{[3
]}

Bosch, F. ^{[4
]}

Brandau, C. ^{[5
,6
,7
]}

Carroll, J. J. ^{[8
]}

Cullen, D. M. ^{[9
]}

Cullen, I. J. ^{[2
]}

Deo, A. Y. ^{[2
]}

Detwiler, B. ^{[10
]}

Dimopoulou, C. ^{[4
]}

Dracoulis, G. D. ^{[1
]}

Farinon, F. ^{[4
]}

Geissel, H. ^{[4
,11
]}

Haettner, E. ^{[11
]}

Heil, M. ^{[4
]}

Kempley, R. S. ^{[2
]}

Knoebel, R. ^{[4
]}

Kozhuharov, C. ^{[4
]}

Kurcewicz, J. ^{[4
]}

Kuzminchuk, N. ^{[4
]}

Litvinov, S. ^{[4
]}

Liu, Z. ^{[12
]}

Mao, R. ^{[13
]}

Nociforo, C. ^{[4
]}

Nolden, F. ^{[4
]}

Plass, W. R. ^{[4
,11
]}

Podolyak, Zs. ^{[2
]}

Prochazka, A. ^{[4
]}

Scheidenberger, C. ^{[4
,11
]}

Shubina, D. ^{[3
]}

Steck, M. ^{[4
]}

Stoehlker, Th. ^{[4
,14
]}

Sun, B. ^{[15
]}

Swan, T. P. D. ^{[2
]}

Trees, G. ^{[10
]}

Weick, H. ^{[4
]}

Winckler, N. ^{[3
,4
]}

Winkler, M. ^{[4
]}

Woods, P. J. ^{[12
]}

Yamaguchi, T. ^{[16
]}

机构：

[1] Australian Natl Univ, Dept Nucl Phys, RSPE, Canberra, ACT 0200, Australia

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

[3] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[4] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany

[5] ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[6] GSI Helmholtzzentrum Schwerionenforsch, Div Res, D-64291 Darmstadt, Germany

[7] Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany

[8] US Army Res Lab, Adelphi, MD 20783 USA

[9] Univ Manchester, Sch Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England

[10] Youngstown State Univ, Youngstown, OH 44555 USA

[11] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[12] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[13] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[14] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[15] Beihaug Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China

[16] Saitama Univ, Grad Sch Sci & Engn, Saitama 3388570, Japan

来源：

PHYSICAL REVIEW C | 2015年 / 91卷 / 03期

基金：

日本学术振兴会; 澳大利亚研究理事会;

关键词：

SCHOTTKY MASS-SPECTROMETRY; HEAVY-ION STORAGE; DEPENDENCE; TRAPS; STATE; FRS;

D O I：

10.1103/PhysRevC.91.031301

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：

An excited metastable nuclear state of Os-192 in a hydrogen-like charge state has been studied for the first time. It was populated in projectile fragmentation of a Au-197 beam on a Be-9 target with the UNILAC-SIS accelerators at GSI. Fragmentation products in the region of interest were passed through the fragment separator and injected into the experimental storage ring (ESR). Cooling of the injected beam particles enabled Schottky mass spectrometry to be performed. Analysis shows the lifetime of the state to be considerably longer than that of the neutral ion [tau(neut) = 8.5(14) s]; this change is attributed to hindrance of internal conversion in hydrogen-like Os-192. Calculations have been performed to estimate the lifetime, and the result has been compared with that measured experimentally. There is good agreement between the expected [tau(H-like) = 13.0(24) s] and measured lifetimes (tau(rest) = 15.1(-1.3)(+1.5) s) from the internal decay of Os-192m. This provides a test for the reliability of the values obtained from internal conversion coefficient calculations in highly ionized systems and is the first measurement of its kind to be performed using the ESR setup.

引用

页数：4

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