title: Preparation of oriented and aligned H(2) and HD by stimulated Raman pumping.
abstract: Stimulated Raman pumping has been used to prepare oriented and aligned samples of H(2)(nu=1,J=1,2,3) and HD(nu=1,J=2) under collision-free conditions using the (1,0) S(0), S(1), Q(1), Q(2), and O(3) lines. The M-sublevel anisotropies were interrogated by polarized [2+1] resonance-enhanced multiphoton ionization via the (0,1) O(2), O(3), and S(1) lines of the E,F (1)Sigma(g) (+)-X (1)Sigma(g) (+) system. The optical excitation schemes employed in this study generate highly oriented and aligned molecular ensembles. We show that the H(2)(nu=1,J=2,M=0) and H(2)(nu=1,J=2,M=2) samples retain their initial polarization for greater than 100 ns and are therefore suitable candidates for targets or projectiles in future scattering experiments.
authors.affiliation: Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA.
authors.forename: Nate C M
authors.initials: NC
authors.lastname: Bartlett
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Miller
authors.forename: Richard N
authors.initials: RN
authors.lastname: Zare
authors.forename: Dimitris
authors.initials: D
authors.lastname: Sofikitis
authors.forename: T
authors.initials: T
authors.lastname: Peter Rakitzis
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Alexander