Electron-impact rotational and hyperfine excitation of HCN, HNC, DCN and DNC
Electron-impact rotational and hyperfine excitation of HCN, HNC, DCN and DNC
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HCN、HNC、DCN 和 DNC 的电子轰击旋转和超精细激发
DOI:
10.1111/j.1365-2966.2007.12416.x
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发表时间:
2007
影响因子:
4.8
通讯作者:
Faure A
中科院分区:
文献类型:
--
作者:
Faure A
Rotational excitation of isotopologues of HCN and HNC by thermal electron-impact is studied using the molecular R-matrix method combined with the adiabatic-nuclei-rotation approximation. Rate coefficients are obtained for electron temperatures in the range 5–6000 K and for transitions among all levels up toJ= 8. Hyperfine rates are also derived using the infinite-order-sudden scaling method. It is shown that the dominant rotational transitions are dipole-allowed, that is, those for which ΔJ= 1. The hyperfine propensity rule ΔJ=ΔFis found to be stronger than that in the case of He–HCN collisions. For dipole-allowed transitions, electron-impact rates are shown to exceed those for excitation of HCN by He atoms by six orders of magnitude. As a result, the present rates should be included in any detailed population model of isotopologues of HCN and HNC in sources where the electron fraction is larger than 10−6, for example, in interstellar shocks and comets.
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影响因子:
8.6
作者:
R. Čurík;J. Ziesel;N. Jones;T. Field;D. Field
通讯作者:
D. Field
DOI:
--
发表时间:
1976
期刊:
影响因子:
--
作者:
S. Chu
通讯作者:
S. Chu
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
S. Srivastava;H. Tanaka;A. Chutjian
通讯作者:
A. Chutjian
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
J. Gorfinkiel;J. Tennyson
通讯作者:
J. Tennyson
DOI:
10.1046/j.1365-8711.2001.04480.x
发表时间:
2001
影响因子:
4.8
作者:
A. Faure;J. Tennyson
通讯作者:
J. Tennyson