Ram RS, Bernath PF
Department of Chemistry, University of Arizona, Tucson, Arizona, 85721
J Mol Spectrosc. 1999 Aug;196(2):235-247. doi: 10.1006/jmsp.1999.7886.
The emission spectrum of ZrCl has been observed in the 1800-12 000 cm(-1) region using a Fourier transform spectrometer. The molecules were excited in a microwave discharge of a mixture of helium and a trace of ZrCl(4) vapor. In addition to the C(4)Delta-X(4)Phi transition reported previously, numerous new bands observed in the near infrared have been classified into two electronic transitions, 7.3Delta-a(2)Phi and 9.4Phi-a(2)Phi. Five new bands observed in the 6700-7400 cm(-1) region have been assigned as (2)Delta(3/2)-(2)Phi(5/2) and (2)Delta(5/2)-(2)Phi(7/2) subbands of a new electronic transition, 7.3Delta-a(2)Phi. The two subbands of the 9.4Phi-a(2)Phi transition were previously observed by G. Phillips, S. P. Davis, and D. C. Galehouse [Astrophys. J. Suppl. 43, 417-434 (1980)], who tentatively labeled them as (2)Pi(1/2)-(2)Pi(1/2) and (2)Pi(3/2)-(2)Pi(3/2) subbands. A number of new bands involving higher vibrational levels have been identified for these two subbands. A rotational analysis of a number of bands of both transitions has been obtained and spectroscopic constants have been determined. Global perturbations have been observed in both spin components of the a(2)Phi state. The assignment of the observed electronic states has been discussed in light of recent theoretical calculations. Copyright 1999 Academic Press.
使用傅里叶变换光谱仪在1800 - 12000厘米⁻¹区域观测到了ZrCl的发射光谱。分子在氦气与微量ZrCl₄蒸气的混合气体的微波放电中被激发。除了先前报道的C(⁴Δ)-X(⁴Φ)跃迁外，在近红外区域观测到的许多新谱带已被归类为两个电子跃迁，即7.3-a(²Φ)和9.4-a(²Φ)。在6700 - 7400厘米⁻¹区域观测到的五条新谱带已被指定为新电子跃迁7.3-a(²Φ)的(²Δ₃/₂)-(²Φ₅/₂)和(²Δ₅/₂)-(²Φ₇/₂)子带。9.4-a(²Φ)跃迁的两个子带先前由G. 菲利普斯、S. P. 戴维斯和D. C. 盖尔豪斯 [《天体物理学杂志增刊》43, 417 - 434 (1980)] 观测到，他们暂时将其标记为(²π₁/₂)-(²π₁/₂)和(²π₃/₂)-(²π₃/₂)子带。已为这两个子带识别出许多涉及更高振动能级的新谱带。对这两个跃迁的多个谱带进行了转动分析并确定了光谱常数。在a(²Φ)态的两个自旋分量中均观测到了全局微扰。根据最近的理论计算对观测到的电子态的归属进行了讨论。版权所有1999年学术出版社。
