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J/A+AS/142/113      C3H2 and SiC2 collisional rates           (Chandra+, 2000)

Collisional rates for asymmetrical top molecules Chandra S., Kegel W.H. <Astron. Astrophys. Suppl. Ser. 142, 113 (2000)> =2000A&AS..142..113C (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics Keywords: ISM: molecules - molecular data Abstract: Collisional rate coefficients for rotational transitions in C3H2 and SiC2 due to collisions with H2 molecules are calculated. The C3H2 has two distinct species, ortho and para, whereas the SiC2 has only ortho specie due to spin statistics for the identical carbon nuclei. For ortho- and para-C3H2 we accounted for 47 and 48 energy levels, respectively. The calculations are done for the kinetic temperatures 30, 60, 90, and 120 K. For ortho-SiC2, we accounted for 40 energy levels and the calculations are done for the kinetic temperatures 25, 50, 75, 100, and 125 K. The results are reported here for the transitions in the upward direction. The values for the downward direction can easily be calculated with the help of the detailed equilibrium equation. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tables.dat 62 12736 Collisional rate coefficients (tables 3 to 5)
Byte-by-byte Description of file: tables.dat
Bytes Format Units Label Explanations
1- 10 A10 --- El Element 12- 14 I3 K T Temperature 16- 37 A22 --- Trans Transition between two levels 42- 50 D9.3 cm+3/s Rate Collisional rate coefficient for the transition from the lower level (l) to the upper level (u) at the temperature T 56- 57 I2 --- l Lower level 61- 62 I2 --- u Upper level
Acknowledgements: W.H. Kegel
(End) Patricia Bauer [CDS] 16-Dec-1999
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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