Rotationally cold (> 99% J=0) OH-molecular ions in a cryogenic storage ring

被引：0

作者：

Eklund, Gustav ^{[1
]}

Chartkunchand, Kiattichart ^{[1
]}

Anderson, Emma K. ^{[1
]}

Kaminska, Magdalena ^{[1
,2
]}

de Ruette, Nathalie ^{[1
]}

Thomas, Richard D. ^{[1
]}

Kristiansson, Moa K. ^{[1
]}

Gatchell, Michael ^{[1
]}

Reinhed, Peter ^{[1
]}

Rosen, Stefan ^{[1
]}

Simonsson, Ansgar ^{[1
]}

Kallberg, Anders ^{[1
]}

Lofgren, Patrik ^{[1
]}

Mannervik, Sven ^{[1
]}

Zettergren, Henning ^{[1
]}

Cederquist, Henrik ^{[1
]}

Schmidt, Henning T. ^{[1
]}

机构：

[1] Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden

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

来源：

XXX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2017) | 2017年 / 875卷

关键词：

PHOTODETACHMENT; THRESHOLD;

D O I：

10.1088/1742-6596/876/2/012016

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

We store a 10 keV OH- ion-beam at 13.5 +/- 0.5 K in one of the DESIREE storage rings. Using photodetachment thermometry we measure the effective relative photodetachment cross section at different storage times and determine the rotational temperature of the ions to be 13.4 +/- 0.2 K in agreement with the macroscopic temperature. A model cross section in the threshold range taking into account the formation of excited neutral OH molecules is calculated as a function of rotational temperature in order to justify the use of the rotational thermometry method developed earlier by the group of Roland Wester at Innsbruck University in the present case. In addition, we apply a selective photodetachment technique to produce an ion beam with more than 99% of the ions in the rotational ground state. The intrinsic lifetime of the J = 1 rotational level is measured to be 145 +/- 28 s.

引用

页数：4

共 39 条

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