The Laboratory Observation of the J=1--0, K=0 Transition of the H 3S + Ion
Abstract
The J = 1-0, K = 0 rotational transition of H3S(+) ions produced from H2S and H2 by a 600-mA dc discharge is observed using a 100-kHz source-modulated spectrometer covering the frequency range 60-400 GHz, a 2-m-long 10-cm-OD hollow-cathode free-space cell at -120 C, and an InSb photoconductive detector operating at 4.2 K. The line is observed at 293457.204 + or - 0.017 MHz (where the error is the standard deviation for six measurements), in agreement with the theoretical prediction of Nakanaga and Amano (1986). The intensity of the line is found to decrease by a factor of 6-7 when a 63-G magnetic field is applied to the cell, strongly indicating that it is indeed an ionic transition line.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1987
- DOI:
- 10.1086/184844
- Bibcode:
- 1987ApJ...314L..27S
- Keywords:
-
- Hydrogen Sulfide;
- Interstellar Matter;
- Molecular Clouds;
- Molecular Ions;
- Molecular Spectra;
- Radio Spectroscopy;
- Stellar Envelopes;
- Astrophysics;
- INTERSTELLAR: MOLECULES;
- LABORATORY SPECTRA