The Rotational Spectrum of SH and SD

Abstract

With the Cologne terahertz spectrometer, the lower J rotational spectrum of the SD radical has been detected for the Ðrst time in the laboratory, in analogy with our previous recent detection of the SH radical. The radicals were produced by discharging bu †ered with He and The H 2 S (D 2 S) H 2 (D 2 ). spectra were analyzed employing HundÏs case (a) coupling scheme. The SH radical has an inverted 2% state, as does OH, so that the state is the energetically lower one. For both SH and SD, the 2% 3@2 rotational and centrifugal distortion constants, the spin orbit, the spin rotation, the "-doublet, and the hyperÐne interaction constants were determined by combining the newly acquired experimental data with those available in the literature. The rotational constant for SD is 146885.297 (26) MHz, while B 0 our latest value for SH is 283587.62 (12) MHz (the values in parentheses denote the calculated uncertainty obtained by a least-squares Ðt). The SH radical and its deuterated isotopomer may be detectable in interstellar space because of the high cosmic abundance of elemental sulfur and the high abundance of Since the electronic state lies nearly 400 cm~1 above the state, the rotational tran-H 2 S. 2% 1@2 2% 3@2 sitions in the state should only be detectable in hot interstellar sources, and they are potentially 2% 1@2 good indicators of star formation.

Rotational Spectra of Phosphorus Monosulfide up to 1 THz

“…representing Hund's case (a) [15]. For the hyperfine analysis, the basis was extended to include the total angular momentum quantum number F, where…”

TIMASSS: the IRAS 16293-2422 millimeter and submillimeter spectral survey

“…(3) For each species, the spectroscopic references given here are the most recent cited in the CDMS and JPL databases. All of them should be read as reference and references therein: (aa) Winnewisser et al (1997); (ab) Cazzoli et al (2004); (ac) Klapper et al (2001); (ad) Klapper et al (2003); (ae) Bogey et al (1997); (a f ) Klaus et al (1996); (ag) Müller et al (2000d); (ah) Bocquet et al (1999); (ai) Müller et al (2000c); (a j) Lohilahti & Horneman (2004); (ak) Müller et al (2000b); (al) Müller et al (2000a); (am) Belov et al (1998); (an) Müller et al (2004); ( Kim & Yamamoto (2003); (aw) Thorwirth et al (2003); (ax) ; (ay) Brünken et al (2004); (az) ; (ba) Kleiner et al (1996); (bb) Müller et al (2009);(bc) Clouthier et al (1994); (bd) Brown et al (1987); (be) Minowa et al (1997); (b f ) Golubiatnikov et al (2005); (bg) Lovas & Suenram (1987); (bh) Maeda et al (2008); (bi) Cho & Saito (1998); (b j) Thorwirth et al (2000a); (bk) Brünken et al (2006); (bl) Thorwirth et al (2000b); (bm) Spahn et al (2008); (bn) Belov (1995); (bo) Camy-Peyret et al (1985); (bp) …”

EINSTEIN A COEFFICIENTS AND OSCILLATOR STRENGTHS FOR THE A 2 Π- X 2 Σ + (RED) AND B 2 Σ + -X 2 Σ

“…For the B 2 Σ + -X 2 Σ + transition, 57 bands involving v = 0-15 in both the ground and excited states (Ram et al 2006) were analyzed. The final data set of the two transitions included the existing infrared vibration-rotation measurements by Davis et al (1991), Horká et al (2004), andHübner et al (2005) in addition to the available microwave and millimeter wave measurements of the ground state (Hempel et al 2003;Hübner et al 2005;Dixon & Woods 1977;Skatrud et al 1983;Johnson et al 1984;Ito et al 1991;Klisch et al 1995).…”

“…There have been several studies of the infrared vibrationrotation bands (Davis et al 1991;Horká et al 2004) as well as microwave and millimeter-wave studies of the X 2 Σ + ground state (Hempel et al 2003;Hübner et al 2005;Dixon & Woods 1977;Skatrud et al 1983;Johnson et al 1984;Ito et al 1991;Klisch et al 1995) that provided measurements of the pure rotational transitions for the v = 0 to 10 vibrational levels. An experimental dipole moment of 1.45 ± 0.08 D for the X 2 Σ + state was measured by Thomson & Dalby (1968), on which current available rotational line intensities in spectroscopic databases are based (Pickett et al 1998;Müller et al 2001).…”