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Rotational spectroscopy of a triatomic molecular anion

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...

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Bibliographic Details
Main Authors: Lakhmanskaya, Olga (Author) , Simpson, Malcolm (Author) , Murauer, Simon (Author) , Nötzold, Markus (Author) , Endres, Eric (Author) , Kokoouline, Viatcheslav (Author) , Wester, Roland (Author)
Format: Article (Journal)
Language:English
Published: 22 June 2018
In: Physical review letters
Year: 2018, Volume: 120, Issue: 25
ISSN:1079-7114
DOI:10.1103/PhysRevLett.120.253003
Online Access:Verlag, Volltext: https://doi.org/10.1103/PhysRevLett.120.253003
Verlag: https://link.aps.org/doi/10.1103/PhysRevLett.120.253003
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Author Notes:Olga Lakhmanskaya, Malcolm Simpson, Simon Murauer, Markus Nötzold, Eric Endres, Viatcheslav Kokoouline, and Roland Wester
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Summary: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−.
Item Description:Gesehen am 06.11.2019
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.120.253003

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