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Titolo:
Millimeter-wave time-resolved studies of HCO+-H-2 inelastic collisions
Autore:
Oesterling, LC; De Lucia, FC; Herbst, E;
Indirizzi:
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA Ohio State Univ Columbus OH USA 43210 , Dept Phys, Columbus, OH 43210 USA
Titolo Testata:
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
fascicolo: 4, volume: 57, anno: 2001,
pagine: 705 - 716
SICI:
1386-1425(20010315)57:4<705:MTSOHI>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-IONS; ROTATIONAL-EXCITATION; LOW-TEMPERATURE; 600 K; PRESSURE; HYDROGEN; HELIUM; LINES; H-2; HE;
Keywords:
Langevin theory; spectroscopy; radicals;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Herbst, E Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA Ohio State Univ 174 W 18th Ave Columbus OH USA 43210 H 43210 USA
Citazione:
L.C. Oesterling et al., "Millimeter-wave time-resolved studies of HCO+-H-2 inelastic collisions", SPECT ACT A, 57(4), 2001, pp. 705-716

Abstract

A novel ion cell has been constructed for the purpose of studying rotationally inelastic collisions involving truly thermal molecular ions at low temperatures. With this ion cell, time-resolved double resonance (pump-probe) spectroscopic experiments have been performed to determine the cross sections for relaxation of the J=2 state of HCO+ in collisions with normal-H, at temperatures around 40 and 77 K. The HCO+ is pumped through the J=2 <--1 transition and probed via the J=3 <--2 transition. The cross sections at the lower temperature are slightly below those predicted by the simple Langevintheory, while those at the higher temperature are in good agreement with this theory. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 22/09/20 alle ore 23:52:36