ELECTRONIC-SPECTRA OF N2+-(HE)N (N = 1, 2, 3)

被引:36
作者
BIESKE, EJ
SOLIVA, AM
FRIEDMANN, A
MAIER, JP
机构
[1] Institut für Physikalische Chemie, Universität Basel, CH-4056 Basel
关键词
D O I
10.1063/1.462517
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ionic clusters of nitrogen and helium have been investigated by recording their electronic spectra in the near UV. Structured bands belonging to N-14(2+)-He, N-14(2+)-(He)2, N-14(2+)-(He)3, and N-15(2+)-He have been measured between 390 and 392 nm close to the N2+ B 2-SIGMA(u+) <-- X 2-SIGMA(g+) band origin. Spectra were obtained by exciting mass selected cluster cations with tunable laser radiation and recording the photodissociation cross section as a function of wavelength. The data support the hypothesis that the He---N2+ interaction potential has only a small barrier to internal rotation in both the X and B electronic states. A lower estimate for the dissociation energy of the N2+-He cluster of 101 cm-1 is inferred.
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页码:28 / 34
页数:7
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