Two-Photon Vibrational Transitions in O-16(2)+ as Probes of Variation of the Proton-to-Electron Mass Ratio

被引：13

作者：

Carollo, Ryan ^{[1
]}

Frenett, Alexander ^{[1
]}

Hanneke, David ^{[1
]}

机构：

[1] Amherst Coll, Dept Phys & Astron, Amherst, MA 01002 USA

来源：

ATOMS | 2018年 / 7卷 / 01期

基金：

美国国家科学基金会;

关键词：

precision measurements; fundamental constants; variation of constants; proton-to-electron mass ratio; molecular ions; forbidden transition; two-photon transition; vibrational overtone;

D O I：

10.3390/atoms7010001

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：

Vibrational overtones in deeply-bound molecules are sensitive probes for variation of the proton-to-electron mass ratio m. In nonpolar molecules, these overtones may be driven as two-photon transitions. Here, we present procedures for experiments with O-16(2)+, including state-preparation through photoionization, a two-photon probe, and detection. We calculate transition dipole moments between all X-2 Pi(g) vibrational levels and those of the A(2)Pi(u) excited electronic state. Using these dipole moments, we calculate two-photon transition rates and AC-Stark-shift systematics for the overtones. We estimate other systematic effects and statistical precision. Two-photon vibrational transitions in O-16(2)+ provide multiple routes to improved searches for m variation.

引用

页数：19

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