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The spin-orbit and rotational constants for the N(2) C (") (5)Pi(ui) (v=3) state.

Field RW, Pirali O, Tokaryk DW

Massachusetts Institute of Technology, Department of Chemistry and G. R. Harrison Spectroscopy Laboratory, Cambridge, Massachusetts 02139.

The spin-orbit (A=-16.4 cm(-1)) and rotational (B=1.017 cm(-1)) constants for the N(2) C(") (5)Pi(ui)(v=3) level are determined by a fit to rotational lines in the C(") (5)Pi(u)-A(') (5)Sigma(g) (+)(3-1) band that terminate in J(Omega(') ) (')=3(3), 4(3), 3(2), and 4(2) levels of the C(") state. The C(")-state spin-orbit constant is consistent with semi-empirical estimates, based on spin-orbit constants observed in several other electronic states of N(2) and the atomic spin-orbit coupling constant, zeta(N 2p). The C(")-A(') bands exhibit the unusual feature of oppositely degraded sub-band heads, Omega(')=3 (red) and Omega(')=1, 0, and -1 (blue). The unusually wide range of B(Omega) (eff) values, from 0.85 cm(-1) (Omega=3) to 1.28 cm(-1) (Omega=-1) for C(") (5)Pi(v=3) should be diagnostically useful for Omega(')-assignments. The C(") (5)Pi(v=3) level lies 14257.17 and 90599 cm(-1) above A(') (5)Sigma(g) (+)(v=1) and X (1)Sigma(g) (+)(v=0), respectively, and R(e)(C(") (5)Pi)=1.50 A.

Published 3 March 2006 in J Chem Phys, 124(8): 81103.
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