Double-differential cross sections for the ionization-excitation of the helium by fast proton and antiproton impact

被引：2

作者：

Osváth, Z ^{[1
]}

Nagy, L ^{[1
]}

机构：

[1] Univ Babes Bolyai, Fac Phys, R-3400 Cluj Napoca, Romania

来源：

PHYSICS LETTERS A | 2000年 / 271卷 / 5-6期

关键词：

multi-electron transitions; ion-atom collisions; ionization-excitation; helium atom; double differential cross sections;

D O I：

10.1016/S0375-9601(00)00396-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Calculated double differential cross sections are presented for the simultaneous ionization and excitation into the 2p state of the helium atom by fast proton and antiproton impact. We have used the semiclassical impact parameter method and the transition amplitude was calculated in second-order perturbation approximation. We have investigated the dependence of the cross sections on the sign of the projectile charge, and have analyzed the influence on the results of the inclusion of electron correlation in the initial state. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：385 / 390

页数：6

共 19 条

[1] Absolute measurement of ionization-excitation of helium at intermediate energies and their interpretation [J].

Avaldi, L ;

Camilloni, R ;

Multari, R ;

Stefani, G ;

Langlois, J ;

Robaux, O ;

Tweed, RJ ;

Vien, GN .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (13) :2981-2997

[2]

BAYLEY M, 1995, J PHYS B ATOM MOL PH, V28, P2655

[3] Simultaneous excitation-ionization of helium to the He+(2p) state [J].

Dogan, M ;

Crowe, A ;

Bartschat, K ;

Marchalant, PJ .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (07) :1611-1624

[4] (E, 2E) TRIPLE DIFFERENTIAL CROSS-SECTIONS FOR THE SIMULTANEOUS IONIZATION AND EXCITATION OF HELIUM [J].

DUPRE, C ;

LAHMAMBENNANI, A ;

DUGUET, A ;

MOTAFURTADO, F ;

OMAHONY, PF ;

DALCAPPELLO, C .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1992, 25 (01) :259-276

[5] ELECTRON-IMPACT IONIZATION-EXCITATION CROSS-SECTIONS OF HELIUM [J].

FRANZ, A ;

ALTICK, PL .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1995, 28 (21) :4639-4649

[6] IONIZATION PLUS EXCITATION OF HELIUM BY FAST ELECTRON AND PROTON IMPACT [J].

FULLING, S ;

BRUCH, R ;

RAUSCHER, EA ;

NEILL, PA ;

TRABERT, E ;

HECKMANN, PH ;

MCGUIRE, JH .

PHYSICAL REVIEW LETTERS, 1992, 68 (21) :3152-3155

[7]

KHEIFETS AS, 1999, J PHYS B ATOM MOL PH, V32, pL1

[8]

Kuplyauskene A. V., 1991, Optics and Spectroscopy, V71, P127

[9] Second-order effects in (e,2e) excitation-ionization of helium to He+ (n=2) [J].

Marchalant, PJ ;

Whelan, CT ;

Walters, HRJ .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (06) :1141-1178

[10] DOUBLE IONIZATION OF HELIUM BY PROTONS AND ELECTRONS AT HIGH VELOCITIES [J].

MCGUIRE, JH .

PHYSICAL REVIEW LETTERS, 1982, 49 (16) :1153-1157

← 1 2 →