Rotational Lifetimes and State-Resolved Relative Detachment Cross Sections from Photodetachment Thermometry of Molecular Anions in a Cryogenic Storage Ring

被引：41

作者：

Meyer, C. ^{[1
]}

Becker, A. ^{[1
]}

Blaum, K. ^{[1
]}

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

George, S. ^{[1
]}

Goeck, J. ^{[1
]}

Grieser, M. ^{[1
]}

Grussie, F. ^{[1
]}

Guerin, E. A. ^{[1
]}

von Hahn, R. ^{[1
]}

Herwig, P. ^{[1
]}

Krantz, C. ^{[1
]}

Kreckel, H. ^{[1
]}

Lion, J. ^{[1
]}

Lohmann, S. ^{[1
]}

Mishra, P. M. ^{[1
]}

Novotny, O. ^{[1
]}

O'Connor, A. P. ^{[1
]}

Repnow, R. ^{[1
]}

Saurabh, S. ^{[1
]}

Schwalm, D. ^{[1
,3
]}

Schweikhard, L. ^{[2
]}

Spruck, K. ^{[1
,4
]}

Kumar, S. Sunil ^{[1
]}

Vogel, S. ^{[1
]}

Wolf, A. ^{[1
]}

机构：

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

[2] Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany

[3] Weizmann Inst Sci, IL-76100 Rehovot, Israel

[4] Justus Liebig Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 02期

基金：

欧洲研究理事会;

关键词：

THRESHOLD PHOTODETACHMENT; OH; IONS; SPECTRUM; SH;

D O I：

10.1103/PhysRevLett.119.023202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photodetachment thermometry on a beam of OH-in a cryogenic storage ring cooled to below 10 K is carried out using two-dimensional frequency-and time-dependent photodetachment spectroscopy over 20 min of ion storage. In equilibrium with the low-level blackbody field, we find an effective radiative temperature near 15 K with about 90% of all ions in the rotational ground state. We measure the J - 1 natural lifetime (about 193 s) and determine the OH- rotational transition dipole moment with 1.5% uncertainty. We also measure rotationally dependent relative near-threshold photodetachment cross sections for photodetachment thermometry.

引用

页数：5

共 12 条

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