An angle-resolved dissociative photoionization study of the c4Σu- state in O2+ using the TPEPICO technique

被引：9

作者：

Padmanabhan, A. ^{[1
]}

MacDonald, M. A. ^{[2
]}

Ryan, C. H. ^{[2
]}

Zuin, L. ^{[2
]}

Reddish, T. J. ^{[1
]}

机构：

[1] Univ Windsor, Dept Phys, Windsor, ON N9B 3P4, Canada

[2] Canadian Light Source, Saskatoon, SK S7N 0X4, Canada

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2010年 / 43卷 / 16期

基金：

加拿大自然科学与工程研究理事会;

关键词：

RESOLUTION THRESHOLD PHOTOELECTRON; 20-28 EV RANGE; PHOTODOUBLE IONIZATION; VECTOR CORRELATIONS; MOLECULAR-OXYGEN; CROSS-SECTIONS; RYDBERG STATES; PREDISSOCIATION; SPECTROSCOPY; ION;

D O I：

10.1088/0953-4075/43/16/165204

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have investigated the angular distributions of O+(S-4) ions produced from dissociative photoionization of O(2)(+)c(4)Sigma(-)(u) (nu = 0, 1) using the TPEPICO technique, i.e. by measuring the coincidence yield between threshold photoelectrons and photoions. The vibrational levels have distinctly different lifetimes, tau(nu), which diminish their inherent anisotropic photoion angular distribution characterized by a beta parameter. We obtain tau(1) = 6.0 +/- 0.3 x 10(-14) s and a lower limit on tau(0) of approximate to 1 x 10(-12) s, in broad agreement with other experimental studies using different methods, and find that beta = 0.40 +/- 0.05, which is significantly at variance with the predicted value of >= 1.6.

引用

页数：7

共 24 条

[1] A dissociative photoionization study of the c4Σu- state in O2+ using the TPEPICO technique
Padmanabhan, A.
MacDonald, M. A.
Ryan, C. H.
Zuin, L.
Reddish, T. J.
XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15, 2012, 388
[2] Rotationally resolved photoelectron study of O2:: Identification of the vibrational progressions for O2+(22Πu,2Σu-) at 19.6-21.0 eV
Hsu, CW
Evans, M
Stimson, S
Ng, CY
JOURNAL OF CHEMICAL PHYSICS, 1998, 108 (12): : 4701 - 4704
[3] THEORETICAL-STUDY OF THE PREDISSOCIATION OF THE C4-SIGMA-U STATE OF O2+
TANAKA, K
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JOURNAL OF CHEMICAL PHYSICS, 1979, 70 (04): : 1626 - 1633
[4] C-1S PHOTOIONIZATION OF H2CO AND C2H4 - AN ANGLE-RESOLVED PHOTOELECTRON STUDY
KILCOYNE, ALD
SCHMIDBAUER, M
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RANDALL, KJ
FELDHAUS, J
JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (09): : 6735 - 6741
[5] New insights onto dissociation of state-selected O2+ ions investigated by double imaging photoelectron photoion coincidence: The superimposed 32Πu and c4Σu- inner-valence states
Tang, Xiaofeng
Garcia, Gustavo A.
Nahon, Laurent
JOURNAL OF CHEMICAL PHYSICS, 2018, 148 (12):
[6] ISOTOPE EFFECT IN THE PREDISSOCIATION OF THE C 4-SIGMA-U-STATE OF O2+
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JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1987, 20 (10) : 2247 - 2254
[7] Competition between autoionization and dissociation in the [O2+(B 2Σg-)]nl and [O2+(c 4Σu-)]nl Rydberg states investigated by photon-induced dissociation to neutral fragments
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JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2003, 36 (21) : 4311 - 4326
[8] Angle-resolved photoemission study of PrBa2Cu3O7 and PrBa2Cu4O8
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ADVANCES IN SUPERCONDUCTIVITY XII, 2000, : 173 - 175
[9] ANGLE-RESOLVED PHOTOEMISSION-STUDY OF OXYGEN-INDUCED C(2 X 4) STRUCTURE ON PD(110)
YAGI, K
HIGASHIYAMA, K
FUKUTANI, H
SURFACE SCIENCE, 1993, 295 (1-2) : 230 - 240
[10] Surface states of the 3C-SiC(001)-c(4 x 2) surface studied using angle-resolved photoemission
Duda, L
Johansson, LSO
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PHYSICAL REVIEW B, 2000, 61 (04): : R2460 - R2463

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