Rotational Spectroscopy Of A Triatomic Molecular Anion

Abstract

Rotational transitions of the nonlinear triatomic molecular anion NH2- have been observed by terahertz spectroscopy in a cryogenic radio frequency ion trap. Absorption of terahertz photons has been probed by rotational state-dependent photodetachment of the trapped negative ions near the detachment threshold. Using this two-photon scheme, the two lowest rotational transitions for the asymmetric top rotor NH2- have been found. For the para nuclear spin configuration, the 10←00 transition frequency was determined to be 933 954(2) MHz, and for the ortho configuration the 1+1←1-1 transition frequency was determined to be 447 375(3) MHz. This result appears to preclude the recent tentative assignment of an interstellar absorption feature to NH2-.

Publication Date

6-22-2018

Publication Title

Physical Review Letters

Volume

120

Issue

25

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.120.253003

Socpus ID

85049048366 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85049048366

This document is currently not available here.

Share

COinS