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Fine and hyperfine excitation of NH and ND by He: On the importance of calculating rate coefficients of isotopologues
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10.1063/1.4753423
/content/aip/journal/jcp/137/11/10.1063/1.4753423
http://aip.metastore.ingenta.com/content/aip/journal/jcp/137/11/10.1063/1.4753423

Figures

Image of FIG. 1.
FIG. 1.

Jacobi coordinate for NH–He and ND–He potential energy surface.

Image of FIG. 2.
FIG. 2.

Plot of first four radial Legendre expansion coefficients (λ = 0…3) as a function of R. Solid lines denote NH–He while dashed lines denote ND–He.

Image of FIG. 3.
FIG. 3.

Diagram of the energy levels of NH and ND.

Image of FIG. 4.
FIG. 4.

Collisional excitation cross sections of ND by He out of N, j = 4, 5 state.

Image of FIG. 5.
FIG. 5.

Temperature dependence of ND–He rate coefficients out of N, j = 4, 5 state. (a) Δj = ΔN transitions. (b) Δj ≠ ΔN transitions.

Image of FIG. 6.
FIG. 6.

Temperature variation of the hyperfine resolved NH–He rate coefficients for transitions. (a) Δj = ΔN transitions. (b) Δj ≠ ΔN transitions. The number corresponds to the quantum number.

Image of FIG. 7.
FIG. 7.

Same as Figure 6, but for ND–He rate coefficients.

Image of FIG. 8.
FIG. 8.

Temperature variation of the fine structure resolved NH–He (solid line) and ND–He rate coefficients (dashed line) for selected N, jN, j transitions.

Tables

Generic image for table
Table I.

Fine structure energies of the ND molecule.

Generic image for table
Table II.

Comparison between NH and ND cross sections. The cross sections are in Å2.

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/content/aip/journal/jcp/137/11/10.1063/1.4753423
2012-09-19
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Fine and hyperfine excitation of NH and ND by He: On the importance of calculating rate coefficients of isotopologues
http://aip.metastore.ingenta.com/content/aip/journal/jcp/137/11/10.1063/1.4753423
10.1063/1.4753423
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