Isotopologue-selective excitation studied via optical-optical double resonance using the E-3 sigma(+)(1)(6(3)S(1)) - A(3)Pi(0+)(5(3)P(1)) - X-1 sigma(0+)(5(1)S(0)) transitions in CdAr and CdKr van der Waals complexes

摘要

A method of experimental selection of molecular isotopologues using optical-optical double resonance (OODR) scheme and supersonic beam source of van der Waals (vdW) complexes is presented. Due to an appropriately large isotopic shift, the proper choice of a wavenumber of a sufficiently narrowband laser in the first transition of OODR scheme can lead to a selective isotopologue excitation to the intermediate state. Thanks to this approach, it is possible to select some of the isotopologues which subsequently give a contribution to laser induced fluorescence (LIF) signal originated from the final state of OODR. In this article, results of tests of the proposed method that employs the E-3 Sigma(+)(1) - A(3)Pi(0+) - X-1 Sigma(0+) transitions in two vdW complexes, CdKr and CdAr, are presented and analysed. (C) 2018 Elsevier Ltd. All rights reserved.