Revisiting the J = 1 ← 0 fundamental rotational transition of HHe + with action spectroscopy

Physical Chemistry Chemical Physics 2026 Open access

Read full text
Authors: Oskar Asvany, Urs Graf, Weslley G. D. P. Silva, Lea Schneider, Slawa Kabanovic, Volker Ossenkopf, Jürgen Stutzki, Igor Savić, Rolf Güsten, Oliver Ricken, Bernd Klein, Stephan Schlemmer
DOI: 10.1039/d5cp04689k
Cited by: 2
References: 56

Abstract

at 2.010 THz has been revisited using a combination of a 4 K 22-pole ion trap apparatus and a high-power frequency multiplied THz source. For the detection of the resonant absorption, three different action spectroscopic techniques have been applied, one of which is demonstrated here for the first time (ejection of the ion upon pure rotational excitation). The different methods are evaluated and compared, and improve the accuracy and precision of the former transition value by one order of magnitude to 2010.183312(8) GHz.

Fields of Study & Subjects

Spectroscopy and Laser Applications Advanced Frequency and Time Standards Cold Atom Physics and Bose-Einstein Condensates

Publication details

Journal / source
Physical Chemistry Chemical Physics
Publisher
Royal Society of Chemistry (RSC)
Volume
28
Issue
7
Pages
4662–4667
Publication date
1 January 2026
Language
EN