Experimental Evidence of Twin Fast Metastable H(22S) Atoms from Dissociation of Cold H2 Induced by Electrons

被引：14

作者：

Robert, J. ^{[1
]}

Zappa, F. ^{[2
]}

de Carvalho, C. R. ^{[3
]}

Jalbert, Ginette ^{[3
]}

Nascimento, R. F. ^{[4
]}

Trimeche, A. ^{[1
]}

Dulieu, O. ^{[1
]}

Medina, Aline ^{[5
]}

Carvalho, Carla ^{[6
]}

de Castro Faria, N. V. ^{[3
]}

机构：

[1] Univ Paris 11, CNRS, ENS Cachan, Aime Cotton Lab, F-91405 Orsay, France

[2] Univ Fed Juiz de Fora, Dept Fis, BR-36036330 Juiz de Fora, MG, Brazil

[3] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil

[4] Ctr Fed Educ Tecnol Celso Suckow da Fonseca, BR-25620003 Petropolis, Brazil

[5] Univ Fed Bahia, Inst Fis, BR-40210340 Salvador, BA, Brazil

[6] Univ Estado Rio De Janeiro, Inst Aplicacao Fernando Rodrigues da Silveira, BR-20261232 Rio De Janeiro, Brazil

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 18期

关键词：

STATES; FLUORESCENCE; EXCITATION; MOLECULES;

D O I：

10.1103/PhysRevLett.111.183203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the direct detection of two metastable H(2(2)S) atoms coming from the dissociation of a single cold H-2 molecule, in coincidence measurements. The molecular dissociation was induced by electron impact in order to avoid limitations by the selection rules governing radiative transitions. Two detectors, placed close to the collision center, measure the neutral metastable H(2(2)S) through a localized quenching process, which mixes the H(2(2)S) state with the H(2(2)P), leading to a Lyman-alpha detection. Our data show the accomplishment of a coincidence measurement which proves for the first time the existence of the H(2(2)S)-H(2(2)S) dissociation channel.

引用

页数：5

共 23 条

[1] Dissociative recombination cross section and branching ratios of protonated dimethyl disulfide and N-methylacetamide [J].

Al-Khalili, A ;

Thomas, R ;

Ehlerding, A ;

Hellberg, F ;

Geppert, WD ;

Zhaunerchyk, V ;

af Ugglas, M ;

Larsson, M ;

Uggerud, E ;

Vedde, J ;

Adlhart, C ;

Semaniak, J ;

Kaminska, M ;

Zubarev, RA ;

Kjeldsen, F ;

Andersson, PU ;

Österdahl, F ;

Bednarska, VA ;

Paál, A .

JOURNAL OF CHEMICAL PHYSICS, 2004, 121 (12) :5700-5708

[2]

[Anonymous], DISSOCIATIVE RECOMBI

[3]

Bohm D., 1951, QUANTUM THEORY

[4] Production of excited atomic hydrogen and deuterium from H2 and D2 photodissociation [J].

Bozek, J. D. ;

Furst, J. E. ;

Gay, T. J. ;

Gould, H. ;

D Kilcoyne, A. L. ;

Machacek, J. R. ;

Martin, F. ;

McLaughlin, K. W. ;

Sanz-Vicario, J. L. .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2006, 39 (23) :4871-4882

[5] Can quantum-mechanical description of physical reality be considered complete? [J].

Einstein, A ;

Podolsky, B ;

Rosen, N .

PHYSICAL REVIEW, 1935, 47 (10) :0777-0780

[6] IS SPIN COHERENCE LIKE HUMPTY-DUMPTY .1. SIMPLIFIED TREATMENT [J].

ENGLERT, BG ;

SCHWINGER, J ;

SCULLY, MO .

FOUNDATIONS OF PHYSICS, 1988, 18 (10) :1045-1056

[7] PROPOSAL FOR A LOOPHOLE-FREE TEST OF THE BELL INEQUALITIES [J].

FRY, ES ;

WALTHER, T ;

LI, SF .

PHYSICAL REVIEW A, 1995, 52 (06) :4381-4395

[8] Fluorescence study of doubly excited states of molecular hydrogen [J].

García, EM ;

Ruiz, JA ;

Menmuir, S ;

Rachlew, E ;

Erman, P ;

Kivimäki, A ;

Glass-Maujean, M ;

Richter, R ;

Coren, M .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2006, 39 (02) :205-213

[9] Molecules in the cold environment of a supersonic free-jet beam: from spectroscopy of neutral-neutral interactions to a test of Bell's inequality [J].

Koperski, J. ;

Fry, E. S. .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2006, 39 (19) :S1125-S1150

[10] Potentials of the D10u+ (61S0) and F31u(63P2) Electronic Rydberg States of Cd2 from ab Initio Calculations and Laser-Induced Fluorescence Excitation Spectra [J].

Koperski, J. ;

Strojecki, M. ;

Krosnicki, M. ;

Urbanczyk, T. .

JOURNAL OF PHYSICAL CHEMISTRY A, 2011, 115 (25) :6851-6860

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