ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We report a spectroscopic hyperfine structure study of the 174YbF molecule in the excited states A 2Π1/2(v=0), A 2Π1/2(v=1), and [18.6]0.5(v=0). The fluorine hyperfine interaction constant A(parallel) in each state is, respectively, −1.6±2 MHz, 48.8±3 MHz, and 63.3±3 MHz. The corresponding values of A⊥ are 4.6±1 MHz, −24.7±1 MHz, and −31.9±1 MHz. The very small hyperfine interaction characteristic of A 2Π1/2(v=0) is not seen in A 2Π1/2(v=1) because this state is strongly mixed with [18.6]0.5(v=0). Analysis of our results shows that the lower-lying of the two mixed states is predominantly of [18.6]0.5(v=0) character, not A 2Π1/2(v=1) as had previously been thought. The deperturbed hyperfine constants for [18.6]0.5 are A(parallel)=114±5 MHz and A⊥=−61±2 MHz, comparable with those in the X state and much stronger than in the unperturbed A 2Π1/2 state. This supports the view that the state [18.6]0.5 is of 4f136s2 character. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.478751
