Abstract
The N = 1 0 transition of SH ( in its complete fine structure multiplet (J = 0 1, 2 1, and 1 1) has been measured using submillimeter/THz direct absorption spectroscopy in the frequency range near 346-683 GHz. This work is the first direct laboratory measurement of the J = 0 1 and 1 1 spin components. This molecular ion was created in the gas phase from a mixture of H2S and argon in an AC discharge. Hyperfine components, arising from the nuclear spin of H (I = 1/2), were resolved in every fine structure multiplet. The data have been analyzed using a Hund's case Hamiltonian, resulting in further improvement in the accuracy of the rotational, spin-rotation, spin-spin, and magnetic hyperfine constants for SH From these new data, frequency predictions have been made for the N = 2 1 and 3 2 transitions, with an estimated uncertainty of less than 1 MHz. These data also confirm the recent detection of the two hyperfine components of the N = 1 0, J = 0 1 transition of SH in the Orion Bar, as well as the J = 1 1 component of this molecular ion near 683 GHz toward Sgr B2.
| Original language | English (US) |
|---|---|
| Article number | 119 |
| Journal | Astrophysical Journal |
| Volume | 814 |
| Issue number | 2 |
| DOIs | |
| State | Published - Dec 1 2015 |
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Keywords
- astrochemistry
- ISM: molecules
- line: identification
- methods: laboratory: molecular
- molecular data
ASJC Scopus subject areas
- Space and Planetary Science
- Astronomy and Astrophysics
Cite this
Submillimeter/thz rotational spectroscopy of SH+ (X3∑-) : The complete N = = 1 ← 0 transition. / Halfen, D. T.; Ziurys, Lucy M.
In: Astrophysical Journal, Vol. 814, No. 2, 119, 01.12.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Submillimeter/thz rotational spectroscopy of SH+ (X3∑-)
T2 - The complete N = = 1 ← 0 transition
AU - Halfen, D. T.
AU - Ziurys, Lucy M
PY - 2015/12/1
Y1 - 2015/12/1
N2 - The N = 1 0 transition of SH ( in its complete fine structure multiplet (J = 0 1, 2 1, and 1 1) has been measured using submillimeter/THz direct absorption spectroscopy in the frequency range near 346-683 GHz. This work is the first direct laboratory measurement of the J = 0 1 and 1 1 spin components. This molecular ion was created in the gas phase from a mixture of H2S and argon in an AC discharge. Hyperfine components, arising from the nuclear spin of H (I = 1/2), were resolved in every fine structure multiplet. The data have been analyzed using a Hund's case Hamiltonian, resulting in further improvement in the accuracy of the rotational, spin-rotation, spin-spin, and magnetic hyperfine constants for SH From these new data, frequency predictions have been made for the N = 2 1 and 3 2 transitions, with an estimated uncertainty of less than 1 MHz. These data also confirm the recent detection of the two hyperfine components of the N = 1 0, J = 0 1 transition of SH in the Orion Bar, as well as the J = 1 1 component of this molecular ion near 683 GHz toward Sgr B2.
AB - The N = 1 0 transition of SH ( in its complete fine structure multiplet (J = 0 1, 2 1, and 1 1) has been measured using submillimeter/THz direct absorption spectroscopy in the frequency range near 346-683 GHz. This work is the first direct laboratory measurement of the J = 0 1 and 1 1 spin components. This molecular ion was created in the gas phase from a mixture of H2S and argon in an AC discharge. Hyperfine components, arising from the nuclear spin of H (I = 1/2), were resolved in every fine structure multiplet. The data have been analyzed using a Hund's case Hamiltonian, resulting in further improvement in the accuracy of the rotational, spin-rotation, spin-spin, and magnetic hyperfine constants for SH From these new data, frequency predictions have been made for the N = 2 1 and 3 2 transitions, with an estimated uncertainty of less than 1 MHz. These data also confirm the recent detection of the two hyperfine components of the N = 1 0, J = 0 1 transition of SH in the Orion Bar, as well as the J = 1 1 component of this molecular ion near 683 GHz toward Sgr B2.
KW - astrochemistry
KW - ISM: molecules
KW - line: identification
KW - methods: laboratory: molecular
KW - molecular data
UR - http://www.scopus.com/inward/record.url?scp=84948799204&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84948799204&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/814/2/119
DO - 10.1088/0004-637X/814/2/119
M3 - Article
AN - SCOPUS:84948799204
VL - 814
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 119
ER -