Abstract
The partial cross sections for photodissociation of HeH+ by both electronic (X1 Sigma + to A1 Sigma +) and vibrational (X1 Sigma + to X1 Sigma +) excitations have been studied by the first-order perturbation method. These cross sections sigma vj have been calculated for each of the vibrational levels from v=0 to 8 and for the rotational level j=1 of the ground electronic state. The maximum order of the photodissociation cross section by electronic excitation is 10-1 AA2 which is similar to that observed for H2+ (and its isotopes). For photodissociation by vibrational excitation, the cross sections are of the order of 10-3 AA2 for the v=8 and 7 levels and decrease gradually to 10-1 AA2 for v=0. The special features of the photodissociation cross sections due to the heteropolarity of HeH+ are discussed in detail by comparison with the results obtained for H2+ and HD+.
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