Measurement of the β+ and orbital electron-capture decay rates in fully ionized, hydrogenlike, and heliumlike 140Pr ions

被引：97

作者：

Litvinov, Yu. A. ^{[1
,2
]}

Bosch, F. ^{[1
]}

Geissel, H. ^{[1
,2
]}

Kurcewicz, J. ^{[3
]}

Patyk, Z. ^{[4
]}

Winckler, N. ^{[1
,2
]}

Batist, L. ^{[5
]}

Beckert, K. ^{[1
]}

Boutin, D. ^{[2
]}

Brandau, C. ^{[1
]}

Chen, L. ^{[2
]}

Dimopoulou, C. ^{[1
]}

Fabian, B. ^{[2
]}

Faestermann, T. ^{[6
]}

Fragner, A. ^{[7
]}

Grigorenko, L. ^{[8
]}

Haettner, E. ^{[2
]}

Hess, S. ^{[1
]}

Kienle, P. ^{[6
,7
]}

Knoebel, R. ^{[1
,2
]}

Kozhuharov, C. ^{[1
]}

Litvinov, S. A. ^{[1
,2
]}

Maier, L. ^{[6
]}

Mazzocco, M. ^{[1
]}

Montes, F. ^{[1
,9
]}

Muenzenberg, G. ^{[1
,10
]}

Musumarra, A. ^{[11
,12
]}

Nociforo, C. ^{[1
]}

Nolden, F. ^{[1
]}

Pfuetzner, M. ^{[3
]}

Plass, W. R. ^{[2
]}

Prochazka, A. ^{[1
]}

Reda, R. ^{[7
]}

Reuschl, R. ^{[1
]}

Scheidenberger, C. ^{[1
,2
]}

Steck, M. ^{[1
]}

Stoehlker, T. ^{[1
]}

Torilov, S. ^{[13
]}

Trassinelli, M. ^{[1
]}

Sun, B. ^{[1
,14
]}

Weick, H. ^{[1
]}

Winkler, M. ^{[1
]}

机构：

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

[2] Univ Giessen, D-35392 Giessen, Germany

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

[4] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland

[5] St Petersburg Nucl Phys Inst, Gatchina 188300, Russia

[6] Tech Univ Munich, D-85748 Garching, Germany

[7] Stefan Meyer Inst Subatomare, A-1090 Vienna, Austria

[8] Joint Inst Nucl Res, Dubna 141980, Russia

[9] Michigan State Univ, E Lansing, MI 48824 USA

[10] Manipal Acad Higher Educ, Manipal 576104, Karnataka, India

[11] Ist Nazl Fis Nucl, Lab Nazl Sud, I-195123 Catania, Italy

[12] Catania Univ, I-195123 Catania, Italy

[13] St Petersburg State Univ, St Petersburg 198504, Russia

[14] Peking Univ, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.99.262501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the first measurement of the beta(+) and orbital electron-capture decay rates of (140)Pr nuclei with the simplest electron configurations: bare nuclei, hydrogenlike, and heliumlike ions. The measured electron-capture decay constant of hydrogenlike (140)Pr(58+) ions is about 50% larger than that of heliumlike (140)Pr(57+) ions. Moreover, (140)Pr ions with one bound electron decay faster than neutral (140)Pr(0+) atoms with 59 electrons. To explain this peculiar observation one has to take into account the conservation of the total angular momentum, since only particular spin orientations of the nucleus and of the captured electron can contribute to the allowed decay.

引用

页数：4

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