Zeeman spectroscopy of NiH: Land茅 factors of three 惟 = 3/2 excited electronic states

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• 作者：H. Harker ; C. Richard ; G. Tourasse ; P. Crozet ; A.J. Ross
• 关键词：NiH ; Transition metal monohydride (TMH) ; Molecular Landé ; factors ; Zeeman spectrum ; Absorption spectroscopy ; Laser-induced fluorescence
• 刊名：Journal of Molecular Spectroscopy
• 出版年：October, 2013
• 年：2013
• 卷：292
• 期：Complete
• 页码：28-34
• 全文大小：1549 K

文摘

We report molecular Land茅 factors for three 惟鈥?#xA0;= 3/2 vibronic levels of NiH: E[17.8], D[17.6], and I[17.2], lying 17 000-18 000 cm^鈭? above the ground electronic state. The molecular Land茅 factors of these three states exhibit unusual variations with J and with parity. Also, molecular Land茅 factors of the D[17.6] excited electronic state are unexpectedly sensitive to Ni isotope substitution at low J. These observations provide evidence for extensive mixing among electronic states, deviation from Hund鈥檚 case (a) coupling, and the existence of a local perturbing state. We also report polarization-dependent discrepancies between experimental and theoretical spectral intensities for transitions involving the I[17.2] excited electronic state.