Laboratory detection and submillimeter spectrum of the NaS radical (X2IIi)

B. Z. Li, Lucy M Ziurys

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

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 Ω = 1/2 and 3/2 sublevels of this species in its X2IIi 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 Ω = 1/2 substate. The data were analyzed using a 2II 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.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume488
Issue number2 PART II
StatePublished - 1997

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atomic absorption spectroscopy
sulfide
sodium
orbits
sulfides
absorption spectroscopy
frequency ranges
stars
ground state
interactions
laboratory
parameter
detection

Keywords

  • ISM: molecules
  • Line: identification
  • Molecular data

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Laboratory detection and submillimeter spectrum of the NaS radical (X2IIi). / Li, B. Z.; Ziurys, Lucy M.

In: Astrophysical Journal, Vol. 488, No. 2 PART II, 1997.

Research output: Contribution to journalArticle

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AB - 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 Ω = 1/2 and 3/2 sublevels of this species in its X2IIi 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 Ω = 1/2 substate. The data were analyzed using a 2II 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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KW - Line: identification

KW - Molecular data

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