Storing keV Negative Ions for an Hour: The Lifetime of the Metastable 2P1/2o level in 32S-

被引：54

作者：

Backstrom, E. ^{[1
]}

Hanstorp, D. ^{[2
]}

Hole, O. M. ^{[1
]}

Kaminska, M. ^{[1
,3
]}

Nascimento, R. F. ^{[1
]}

Blom, M. ^{[1
]}

Bjorkhage, M. ^{[1
]}

Kallberg, A. ^{[1
]}

Lofgren, P. ^{[1
]}

Reinhed, P. ^{[1
]}

Rosen, S. ^{[1
]}

Simonsson, A. ^{[1
]}

Thomas, R. D. ^{[1
]}

Mannervik, S. ^{[1
]}

Schmidt, H. T. ^{[1
]}

Cederquist, H. ^{[1
]}

机构：

[1] Stockholm Univ, Dept Phys, AlbaNova, SE-10691 Stockholm, Sweden

[2] Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden

[3] Jan Kochanowski Univ, Inst Phys, PL-25369 Kielce, Poland

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 14期

基金：

瑞典研究理事会;

关键词：

STORAGE-RING; STATES;

D O I：

10.1103/PhysRevLett.114.143003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use a novel electrostatic ion storage ring to measure the radiative lifetime of the upper level in the 3p(5) P-2(1/2)o -> 3p(5) P-2(3/2)o spontaneous radiative decay in S-32(-) to be 503 +/- 54 sec. This is by orders of magnitude the longest lifetime ever measured in a negatively charged ion. Cryogenic cooling of the storage ring gives a residual-gas pressure of a few times 10(-14) mbar at 13 K and storage of 10 keV sulfur anions for more than an hour. Our experimental results differ by 1.3 sigma from the only available theoretical prediction [P. Andersson et al., Phys. Rev. A 73, 032705 (2006)].

引用

页数：5

共 29 条

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