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Rotational excitation of the interstellar NH2 radical by H2.
- Source :
- Journal of Chemical Physics; 2017, Vol. 146 Issue 6, p1-8, 8p, 2 Diagrams, 1 Chart, 8 Graphs
- Publication Year :
- 2017
-
Abstract
- We present quantum close-coupling calculations for the rotational excitation of the interstellar amidogen radical NH<subscript>2</subscript> due to collisions with H<subscript>2</subscript> molecules. The calculations are based on a recent, high-accuracy full-dimensional NH4 potential energy surface adapted for rigid-rotor scattering calculations. The collisional cross section calculations are performed for all transitions among the first 15 energy levels of both ortho- and para-NH<subscript>2</subscript> and for total energies up to 1500 cm<superscript>-1</superscript>. Both paraand ortho-H<subscript>2</subscript> colliding partners are considered. The cross sections for collision with para- and ortho- H<subscript>2</subscript> are found to differ significantly, the magnitude of the ortho-H<subscript>2</subscript> ones being dominant. No strong propensity rules are observed but transitions with Δk<subscript>c</subscript> = 0 are slightly favored. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 146
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 121303907
- Full Text :
- https://doi.org/10.1063/1.4975324