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Physics of the Solid State - The exchange interactions in the Cr3+–Cr3+ ion pairs in the isostructural ABO3 (A = Ga, In, Sc) diamagnetic compounds have been examined using the magnetic... 相似文献
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The 333.6-, 351.1-, and 363.8-nm lines of a cw argon ion laser are found to coincide with the BaS B1Σ+-X1Σ+ (12, 0) R(17), (6, 0) P(35), and (3, 0) R(125) transitions, respectively. Fluorescence transitions from the laser-prepared upper levels terminating in X1Σ+v = 0–28, A1Σ+v = 1–3, A′1Π v = 1–13, and a3Π1v = 3–12 are assigned. These results are combined with a previous analysis of the extensively perturbed BaS A1Σ+-X1Σ+ system [R. F. Barrow, W. G. Burton, and P. A. Jones, Trans. Farad. Soc.67, 902–906 (1971)]. Every observed perturbation of the BaS A1Σ+ state is electronically and vibrationally assigned. The levels a3Π0v = 10–13, a3Π1v = 12–14, a3Π2v = 15, and A′1Π v = 10–13 are sampled via their perturbations of A1Σ+v = 0–2. Although the mutual interactions of the a3Π, A′1Π, and A1Σ+ states approach Hund's case (c) limit, a complete deperturbation is performed from a case (a) starting point. Of the five lowest energy electronic states of BaS, only b3Σ+ remains uncharacterized. Principal deperturbed molecular constants are (in cm?1, 1σ uncertainties in parentheses):
14 498.6(1) | 287.7(1) | 1.15(5) | 9.365(5) | 5.0(10) | 2.633 | |
12 095(6) | 258.9(5) | 0.7 | 8.21(5) | 3.6(5) | 2.813 | |
11 835(6) | 259.6(5) | 0.7 | 8.21 | 3.6 | 2.813 | |
0 | 379.50(4) | 0.91(1) | 10.334(1) | 3.4(2) | 2.507 |