title: Vibrationally selective radiative and non-radiative transitions in gaseous hydrogen molecules.
abstract: An efficient vibrationally selective technique to build-up the v″=1 vibrational levels in gaseous hydrogen is demonstrated using stimulated Raman pumping (SRP). Both photo-acoustic Raman spectroscopy (PARS) and coherent anti-Stokes Raman spectroscopy (CARS) are used to study non-radiative and radiative (v″=0 and v″=1) transitions in gaseous H(2) molecules. The population fraction in the v″=1 vibrational level has been estimated using combined photo-acoustic and coherent anti-Stokes Raman spectroscopy with stimulated Raman pumping.
authors.affiliation: School of Physics and Astronomy, The University of Manchester, Oxford Rd, Manchester M13 9PL, United Kingdom. rameshsharma@lastec.drdo.in
authors.forename: Ramesh C
authors.initials: RC
authors.lastname: Sharma
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Waigh
authors.forename: Anil K
authors.initials: AK
authors.lastname: Maini
authors.forename: Surya N
authors.initials: SN
authors.lastname: Thakur
authors.forename: Jagdish P
authors.initials: JP
authors.lastname: Singh
authors.forename: King C
authors.initials: KC
authors.lastname: Lin
mesh_terms: D004867:Equipment Design; D005740:Gases / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation* / Q000379:methods
chemical_list: D005740:Gases; D006859:Hydrogen