The Pure Rotational Spectrum, Geometry, and Hyperfine Constants of Hafnium Monosulfide, HfS

✍ Scribed by Stephen A Cooke; Michael C.L Gerry

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 142 KB
• Volume: 216
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2002.8678

✦ Synopsis

The pure rotational spectra of seven isotopomers of hafnium monosulfide have been measured for several vibrational states. For the most abundant isotopomer, 180 Hf 32 S, the J = 1 -0, J = 2 -1, and J = 3 -2 transitions were recorded up to the sixth vibrationally excited state. The constants Y 01 , Y 02 , Y 11 , Y 21 , and Y 31 were determined via a multi-isotopomer fit to a Dunham-type expression. In the process of fitting the data it was necessary to include Born-Oppenheimer breakdown correction terms. The equilibrium internuclear distance has been evaluated. For both the 177 Hf 32 S and 179 Hf 32 S isotopomers, nuclear hyperfine structure due to the hafnium nucleus was observed and notably large Hf nuclear quadrupole coupling constants, eQq, were determined.