Correlation studies of excited states of the helium ion

被引:18
作者
Dogan, M [1 ]
Crowe, A [1 ]
机构
[1] Univ Newcastle Upon Tyne, Dept Phys, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
关键词
D O I
10.1088/0953-4075/33/12/107
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The (e, 2e) and e, (3 - 1)e techniques have been used to study electron-impact single ionization of helium to the n = 1-4 ion states and double ionization, respectively. The measurements have been made at an incident electron energy of 200 eV under highly asymmetric kinematics. The n = 2 data show qualitatively similar features to previous higher energy asymmetric studies and can be explained qualitatively. The n = 3, 4 and double ionization data provide new theoretical challenges.
引用
收藏
页码:L461 / L465
页数:5
相关论文
共 14 条
  • [1] Absolute measurement of ionization-excitation of helium at intermediate energies and their interpretation
    Avaldi, L
    Camilloni, R
    Multari, R
    Stefani, G
    Langlois, J
    Robaux, O
    Tweed, RJ
    Vien, GN
    [J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (13) : 2981 - 2997
  • [2] NON-COPLANAR SYMMETRIC (E,2E) MOMENTUM PROFILE MEASUREMENTS FOR HELIUM - AN ACCURATE TEST OF HELIUM WAVEFUNCTIONS
    COOK, JPD
    MCCARTHY, IE
    STELBOVICS, AT
    WEIGOLD, E
    [J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1984, 17 (11) : 2339 - 2352
  • [3] Simultaneous excitation-ionization of helium to the He+(2p) state
    Dogan, M
    Crowe, A
    Bartschat, K
    Marchalant, PJ
    [J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (07) : 1611 - 1624
  • [4] DOGAN M, 1999, J PHYSIQUE 4, V9
  • [5] (E, 2E) TRIPLE DIFFERENTIAL CROSS-SECTIONS FOR THE SIMULTANEOUS IONIZATION AND EXCITATION OF HELIUM
    DUPRE, C
    LAHMAMBENNANI, A
    DUGUET, A
    MOTAFURTADO, F
    OMAHONY, PF
    DALCAPPELLO, C
    [J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1992, 25 (01) : 259 - 276
  • [6] THEORETICAL TRIPLE DIFFERENTIAL CROSS-SECTION OF THE HELIUM ATOM IONIZATION WITH EXCITATION TO THE N=2 ION STATE
    KHEIFETS, AS
    BRAY, I
    MCCARTHY, IE
    SHANG, B
    [J]. PHYSICAL REVIEW A, 1994, 50 (06): : 4700 - 4706
  • [7] Convergent calculations for simultaneous electron-impact ionization-excitation of helium
    Kheifets, AS
    Bray, I
    Bartschat, K
    [J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1999, 32 (15) : L433 - L438
  • [8] Origin of dips and peaks in the absolute fully resolved cross sections for the electron-impact double ionization of He
    Lahmam-Bennani, A
    Taouil, I
    Duguet, A
    Lecas, M
    Avaldi, L
    Berakdar, J
    [J]. PHYSICAL REVIEW A, 1999, 59 (05): : 3548 - 3555
  • [9] LAHMAMBENNANI A, 1991, J PHYS B ATOM MOL PH, V25, P259
  • [10] Second-order effects in (e,2e) excitation-ionization of helium to He+ (n=2)
    Marchalant, PJ
    Whelan, CT
    Walters, HRJ
    [J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (06) : 1141 - 1178