Infrared Spectroscopy: The b′3Π-a3Δ System of ZrS

✍ Scribed by J. Jonsson; B. Lindgren

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 324 KB
• Volume: 169
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1003

✦ Synopsis

The microwave-induced emission spectrum of gaseous (\mathrm{ZrS}) has been recorded at high resolution with a Fourier transform spectrophotometer in the region 6900 to (8800 \mathrm{~cm}^{-1}). A strong band system located around (8000 \mathrm{~cm}^{-1}) is identified as the (b^{\prime 3} \Pi 1-a^{3} \Delta) system, not previously observed. The system is analogous to the (b^{3}\left[I-a^{3} \Delta\right.) system of (\mathrm{ZrO}) around (10700 \mathrm{~cm}^{-1}). The system has been rotationally analyzed, and molecular constants have been determined for the two states involved. The analysis includes bands of the strong ((0,0)) sequence and of the weaker ((1,0)) and ((0,1)) sequences. Only the most abundant isotopomer ({ }^{90} \mathrm{ZrS}) is treated. The fit to the lower state also includes branches of the (d^{3} \Delta-a^{3} \Delta) and (b^{3} \Phi-a^{3} \Delta) systems of (\mathrm{ZrS}). The band system can be recognized in the (J)-band (\left(7400-9700 \mathrm{~cm}^{-1}\right.) ) stellar spectrum of the (S)-type Mira variable (\mathbf{R}) And. No other transitions of ZrS were observed in the region 4000 to (10000 \mathrm{~cm}^{-1}). Co 1995 Academic Press, Inc.