Zy. Zhou et al., HIGH-RESOLUTION SPECTROSCOPIC STUDY OF H2SE (40(-A(1) AND (40(-),0)-B-2 STRETCHING STATES - NORMAL-MODE AND LOCAL MODE ANALYSIS(),0)), Molecular physics, 92(6), 1997, pp. 1073-1081
High resolution spectra of the coupled and degenerate (40(+), 0) A(1)
and (40(-), 0) B-2 (the local mode pair) states of H2Se are reported.
The vibration-rotation transitions of (H2Se)-Se-n (n = 80, 78) were as
signed by using the ground state combination differences and least-squ
ares fits to yield the rotational and coupling constants for the two s
tretching states with degenerate band origins: v(0)(40(+), 0) = 8894.5
04 cm(-1); v(0)(40(-), 0) = 8894.504 cm(-1). Several striking local mo
de limit effects and the formation of fourfold rovibrational energy cl
usters are observed and discussed.