J/A+A/455/1161 Rest frequencies of sub-mm spectrum of SiN (Bizzocchi+, 2006)
Improved rest frequencies for the submillimetre-wave spectrum of SiN.
Bizzocchi L., Degli Esposti C., Dore L.
<Astron. Astrophys., 455, 1161-1164 (2006)>
=2006A&A...455.1161B 2006A&A...455.1161B
ADC_Keywords: Interstellar medium ; Spectroscopy ; Atomic physics
Keywords: molecular data - methods: laboratory - techniques: spectroscopic -
radio lines: ISM
Abstract:
The submillimetre-wave spectrum of the SiN radical has been
investigated in the laboratory using a source-modulation microwave
spectrometer equipped with a negative glow discharge cell. SiN was
produced in a SiCl4/N2 discharge plasma. Twenty-one new fine and
hyperfine components up to N=17-16 were observed reaching a frequency
as high as 740GHz. The new laboratory measurements provide much
improved rest frequencies in the submillimetre spectral region useful
for the identification of SiN lines in hot core sources and
circumstellar shells.
Description:
The rotational spectrum of SiN was recorded in the frequency range
218-741 GHz employing a source modulation millimetre-wave spectrometer
equipped with a negative glow discharge cell.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 50 113 Predicted rest-frequencies (MHz)
and line strengths for SiN
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- N' N' quantum number of rotational transition (N'-N)
3 A1 --- --- [-]
4- 5 I2 --- N N quantum number of rotational transition (N'-N)
7- 10 F4.1 --- J' J' quantum number of spin-rotation coupling
transition (J'-J)
11 A1 --- --- [-]
12- 15 F4.1 --- J J quantum number of spin-rotation coupling
transition (J'-J)
17- 20 F4.1 --- F' F' quantum number of hyperfine transition (F'-F)
21 A1 --- --- [-]
22- 25 F4.1 --- F F quantum number of hyperfine transition (F'-F)
27- 37 F11.3 MHz RFreq Rest frequency
39- 43 F5.3 MHz e_RFreq rms uncertainty on RFreq
45- 50 F6.3 --- S Line strength
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Acknowledgements: Luca Bizzocchi, luca.bizzocchi(at)unibo.it
(End) Patricia Vannier [CDS] 11-Sep-2006