Hexapole transport and focusing of vibrationally excited NO molecules prepared by optical pumping

被引:22
作者
Chen, J [1 ]
Matsiev, D [1 ]
White, JD [1 ]
Murphy, M [1 ]
Wodtke, AM [1 ]
机构
[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA
关键词
D O I
10.1016/j.chemphys.2004.01.025
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We present a detailed report of experiments where hexapole focusing is combined with stimulated emission and Franck-Condon optical pumping techniques on a molecular beam. We show that this approach allows one to achieve a high degree of control over the molecule's ro-vibronic quantum numbers, its laboratory frame velocity, and its transverse divergence. Specifically, new ways of manipulating beams of vibrationally excited molecules emerge, including: (1) transverse refocusing and concomitant improved efficiency for transport of the vibrationally excited molecules, (2) relative enrichment of the concentration of the vibrationally excited molecules with respect to the unexcited portion of the beam, and (3) orientation of vibrationally excited molecules. Laser induced fluorescence, fluorescence depletion, Franck-Condon pumping, stimulated emission pumping, resonance enhanced multi-photon ionization, and hexapole focusing all provide spectroscopic probes into the detailed characteristics of this experiment. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:161 / 172
页数:12
相关论文
共 40 条
[2]   Tracks of symmetric top molecules in hexapole electric fields [J].
Anderson, RW .
JOURNAL OF PHYSICAL CHEMISTRY A, 1997, 101 (41) :7664-7673
[3]   FOKUSSIERUNG POLARER MOLEKULE [J].
BENNEWITZ, HG ;
PAUL, W ;
SCHLIER, C .
ZEITSCHRIFT FUR PHYSIK, 1955, 141 (1-2) :6-15
[4]   Electrostatic trapping of ammonia molecules [J].
Bethlem, HL ;
Berden, G ;
Crompvoets, FMH ;
Jongma, RT ;
van Roij, AJA ;
Meijer, G .
NATURE, 2000, 406 (6795) :491-494
[5]   Deceleration and trapping of ammonia using time-varying electric fields [J].
Bethlem, HL ;
Crompvoets, FMH ;
Jongma, RT ;
van de Meerakker, SYT ;
Meijer, G .
PHYSICAL REVIEW A, 2002, 65 (05) :20
[6]   ORIENTING POLAR MOLECULES IN MOLECULAR BEAMS . SYMMETRIC TOPS [J].
BROOKS, PR ;
JONES, EM ;
SMITH, K .
JOURNAL OF CHEMICAL PHYSICS, 1969, 51 (07) :3073-&
[7]   Vibrational state control of bimolecular reactions: Discovering and directing the chemistry [J].
Crim, FF .
ACCOUNTS OF CHEMICAL RESEARCH, 1999, 32 (10) :877-884
[8]   Vibrationally mediated photodissociation: Exploring excited-state surfaces and controlling decomposition pathways [J].
Crim, F.F. .
Annual Review of Physical Chemistry, 1993, 44 (01) :397-428
[9]   Longitudinal focusing and cooling of a molecular beam [J].
Crompvoets, FMH ;
Jongma, RT ;
Bethlem, HL ;
van Roij, AJA ;
Meijer, G .
PHYSICAL REVIEW LETTERS, 2002, 89 (09) :930041-930044
[10]   A prototype storage ring for neutral molecules [J].
Crompvoets, FMH ;
Bethlem, HL ;
Jongma, RT ;
Meijer, G .
NATURE, 2001, 411 (6834) :174-176