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...
Gespeichert in:
| Hauptverfasser: | , , , , , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
22 June 2018
|
| In: |
Physical review letters
Year: 2018, Jahrgang: 120, Heft: 25 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.120.253003 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1103/PhysRevLett.120.253003 Verlag: https://link.aps.org/doi/10.1103/PhysRevLett.120.253003 
|
| Verfasserangaben: | Olga Lakhmanskaya, Malcolm Simpson, Simon Murauer, Markus Nötzold, Eric Endres, Viatcheslav Kokoouline, and Roland Wester |
| Zusammenfassung: | 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−. |
|---|---|
| Beschreibung: | Gesehen am 06.11.2019 |
| Beschreibung: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.120.253003 |