Vibrationally selected O+-O+ fragmentation of O2 below the adiabatic double-ionization potential studied via electron-electron coincidence spectroscopy

被引：28

作者：

Bolognesi, P ^{[1
]}

Thompson, DB

Avaldi, L

MacDonald, MA

Lopes, MCA

Cooper, DR

King, GC

机构：

[1] Univ Manchester, Dept Phys, Manchester M13 9PL, Lancs, England

[2] CNR, IMAI, Area Ric Roma, I-00016 Monterotondo, Italy

[3] SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.82.2075

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Mechanisms for O-2 photofragmentation leading to the formation of the O+-O+ ion pairs, at photon energies below the adiabatic double-ionization threshold, have been investigated using a threshold-photoelectron-photoelectron coincidence technique. The selectivity and high efficiency of the experimental technique have allowed the process to be followed step by step. The measurements show that fast dissociation of a singly charged ion, followed by atomic autoionization, is the dominant decay route in this energy region.

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页码：2075 / 2078

页数：4

相关论文

共 21 条

[11] VIBRATIONAL STRUCTURE OF THE O-2(2+) GROUND-STATE OBSERVED BY THRESHOLD PHOTOELECTRON COINCIDENCE SPECTROSCOPY [J].

HALL, RI ;

DAWBER, G ;

MCCONKEY, A ;

MACDONALD, MA ;

KING, GC .

PHYSICAL REVIEW LETTERS, 1992, 68 (18) :2751-2754

[12]

Herzberg G, 1950, Molecular spectra molecular structure: Spectra of diatomic molecules, VI

[13] EXPERIMENTAL AND THEORETICAL INVESTIGATION OF THE SPECTROSCOPY AND DYNAMICS OF MULTIPLY CHARGED CO CATIONS [J].

LABLANQUIE, P ;

DELWICHE, J ;

HUBINFRANSKIN, MJ ;

NENNER, I ;

MORIN, P ;

ITO, K ;

ELAND, JHD ;

ROBBE, JM ;

GANDARA, G ;

FOURNIER, J ;

FOURNIER, PG .

PHYSICAL REVIEW A, 1989, 40 (10) :5673-5689

[14] Observation of predissociation and tunnelling processes in O-2(2+): A study using Doppler free kinetic energy release spectroscopy and ab initio CI calculations [J].

Lundqvist, M ;

Edvardsson, D ;

Baltzer, P ;

Larsson, M ;

Wannberg, B .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1996, 29 (03) :499-514

[15] THRESHOLD PHOTOELECTRONS COINCIDENCE SPECTROSCOPY OF DOUBLY-CHARGED IONS OF HYDROGEN-CHLORIDE AND CHLORINE [J].

MCCONKEY, AG ;

DAWBER, G ;

AVALDI, L ;

MACDONALD, MA ;

KING, GC ;

HALL, RI .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1994, 27 (02) :271-282

[16] ATOMIC AUTOIONIZATION FOLLOWING VERY FAST DISSOCIATION OF CORE-EXCITED HBR [J].

MORIN, P ;

NENNER, I .

PHYSICAL REVIEW LETTERS, 1986, 56 (18) :1913-1916

[17] Threshold photoelectron spectrum of O-2 in 31-34 eV region [J].

Tanaka, T ;

Morioka, Y ;

Lu, Y ;

Matsui, T ;

Yoshii, H ;

Hall, RI ;

Hayaishi, T .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1996, 79 :507-509

[18] Observation of photo-double ionization of carbon monoxide below the adiabatic double-ionization potential by threshold-photoelectron-photoelectron coincidence spectroscopy [J].

Thompson, DB ;

Dawber, G ;

Gulley, N ;

MacDonald, MA ;

King, GC .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1997, 30 (05) :L147-L153

[19] THE SPECTROSCOPY AND DYNAMICS OF THE N=3,4 RYDBERG STATES IN O2+ [J].

VANDERKAMP, AB ;

HIEMSTRA, RS ;

VANDERZANDE, WJ ;

FINK, R ;

JUNGEN, M .

JOURNAL OF CHEMICAL PHYSICS, 1993, 99 (10) :7487-7498

[20] THE PRODUCTION OF AUTOIONIZING STATES OF ATOMIC OXYGEN BY THE PHOTODISSOCIATION OF O2 [J].

WILLS, AA ;

CAFOLLA, AA ;

COMER, J .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1991, 24 (18) :3989-4000