High-resolution 2 + 1 REMPI study of the a''1Sigma(g)+ state in N2

E J Salumbides; A Khramov; W Ubachs

doi:10.1021/jp808698u

High-resolution 2 + 1 REMPI study of the a''1Sigma(g)+ state in N2

J Phys Chem A. 2009 Mar 19;113(11):2383-6. doi: 10.1021/jp808698u.

Authors

E J Salumbides¹, A Khramov, W Ubachs

Affiliation

¹ Laser Centre, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.

PMID: 19226115
DOI: 10.1021/jp808698u

Abstract

We reinvestigated the 2 + 1 REMPI Q-branch spectrum of the a''1Sigma(g)+-X1Sigma(g)+ system of N2 at around 202 nm in a Doppler-free configuration with counterpropagating laser beams. Highly accurate absolute calibrations were performed using either an I2 reference standard or a frequency comb reference laser. The observed rotational series shows a clear effect of a perturbation in terms of an anticrossing located at J = 26. In addition to the improved set of molecular constants for the a''1Sigma(g)+ state, we tentatively assign the perturber state to be the 1Sigma(g)+(II) state of N2.