Optical-Optical Double Resonance Spectroscopy of the C-2 Pi-A(2)Pi and D-2 Sigma(+)-A(2)Pi Transitions of SrF

TY - JOUR

T1 - Optical-Optical Double Resonance Spectroscopy of the C-2 Pi-A(2)Pi and D-2 Sigma(+)-A(2)Pi Transitions of SrF

AU - Sheridan, Phillip M.

AU - Wang, Jin-Guo

AU - Dick, Michael J.

AU - Bernath, Peter F.

PY - 2009/11/26

Y1 - 2009/11/26

N2 - Optical-optical double resonance spectroscopy has been used to record rotationally resolved spectra of the C-2 Pi-A(2)Pi and D-2 Sigma(+)-A(2)Pi transitions of SrF. In the investigation, the spectrum of a previously unobserved (2)Sigma(+)-A(2)Pi transition was recorded. The new (2)Sigma(+) state was found to lie lower in energy than the previously labeled D-2 Sigma(+) (nu = 0) state by an amount equal to the vibrational spacing of the D-2 Sigma(+) state. Therefore, the new (2)Sigma(+) state was assigned as the nu = 0 level of the D-2 Sigma(+) state and the previous labeling of the vibrational quantum numbers of the D-2 Sigma(+) state should be increased by 1. Spectroscopic parameters were determined for the C-2 Pi, D-2 Sigma(+) (nu = 0), and D-2 Sigma(+) (nu = 1) states. The D-2 Sigma(+) (nu = 0) state was found to be perturbed, most likely by the spin-orbit components of the C-2 Pi (nu = 1) state. The spin-orbit constant of the C-2 Pi state was found to decrease significantly relative to the A(2)Pi state, similar to CaF and SrOH. Finally, the C-2 Pi and D-2 Sigma(+) states do not appear to form a unique perturber/pure precession pair of states.

AB - Optical-optical double resonance spectroscopy has been used to record rotationally resolved spectra of the C-2 Pi-A(2)Pi and D-2 Sigma(+)-A(2)Pi transitions of SrF. In the investigation, the spectrum of a previously unobserved (2)Sigma(+)-A(2)Pi transition was recorded. The new (2)Sigma(+) state was found to lie lower in energy than the previously labeled D-2 Sigma(+) (nu = 0) state by an amount equal to the vibrational spacing of the D-2 Sigma(+) state. Therefore, the new (2)Sigma(+) state was assigned as the nu = 0 level of the D-2 Sigma(+) state and the previous labeling of the vibrational quantum numbers of the D-2 Sigma(+) state should be increased by 1. Spectroscopic parameters were determined for the C-2 Pi, D-2 Sigma(+) (nu = 0), and D-2 Sigma(+) (nu = 1) states. The D-2 Sigma(+) (nu = 0) state was found to be perturbed, most likely by the spin-orbit components of the C-2 Pi (nu = 1) state. The spin-orbit constant of the C-2 Pi state was found to decrease significantly relative to the A(2)Pi state, similar to CaF and SrOH. Finally, the C-2 Pi and D-2 Sigma(+) states do not appear to form a unique perturber/pure precession pair of states.

KW - INFRARED-EMISSION SPECTRUM

KW - LIGAND-FIELD APPROACH

KW - TUNABLE DYE-LASER

KW - ROTATIONAL ANALYSIS

KW - HYPERFINE-STRUCTURE

KW - ELECTRONIC STATES

KW - RYDBERG STATES

KW - CAF

KW - SYSTEM

KW - POLARIZATION

UR - http://www.scopus.com/inward/record.url?scp=72949099120&partnerID=8YFLogxK

U2 - 10.1021/jp9020855

DO - 10.1021/jp9020855

M3 - Article

SN - 1089-5639

VL - 113

SP - 13383

EP - 13389

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 47

ER -