Laboratory Detection and Submillimeter Spectrum of the NaS Radical ( chi 2 Pi i)

Details Laboratory Detection and Submillimeter Spectrum of the NaS Radical ( chi 2 Pi i) Laboratory Detection and Submillimeter Spectrum of the NaS Radical ( chi 2 Pi i)

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...488l.137l&link_type=abstract

Astrophysical Journal Letters v.488, p.L137

Astronomy and Astrophysics

Astronomy

6

Ism: Molecules, Line: Identification, Molecular Data

Scientific paper

The sodium sulfide radical NaS has been observed in the laboratory for the first time using millimeter/submillimeter direct absorption spectroscopy. Twelve rotational transitions originating in both the Omega = 1/2 and 3/2 sublevels of this species in its X2 Pi i ground state were recorded in the frequency range 200--400 GHz. Splittings arising from lambda-doubling interactions were resolved in both spin-orbit components and were particularly large (~2.9 GHz) in the Omega = 1/2 substate. The data were analyzed using a 2 Pi Hamiltonian, and rotational, spin-orbit, and lambda-doubling parameters were determined. NaS may be detectable in the late-type star IRC +10216, given the observation of CS, SiS, NaCl, and NaCN in this object.

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