Multiple ionization of atoms and molecules in collisions with fast ions. II. Ion-molecule collisions

被引：40

作者：

Kabachnik, NM ^{[1
]}

Kondratyev, VN

Roller-Lutz, Z

Lutz, HO

机构：

[1] Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany

[2] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Naka Ku, Tokai, Ibaraki 31911, Japan

来源：

PHYSICAL REVIEW A | 1998年 / 57卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.57.990

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An extended version of the statistical energy-deposition model is used for a description of multiple ionization of molecules by energetic ion impact. The energy transferred to the molecule during the collision is calculated as a function of the impact parameter within the local-electron-density approximation for a fixed molecular orientation. The fluctuating character of the deposited energy is taken into account by introducing a straggling of the energy transfer. For a given deposited energy the probability of multiple ionization of the molecule is assumed to be proportional to the volume of phase space available at the considered ionization state. The total ionization cross sections obtained by integrating over impact parameters and averaging over all orientations of the molecule, Sample calculations for collisions of He and F ions with N-2 and CO molecules are presented and compared with experimental data. A dependence of the multiple ionization cross section on the molecular orientation is considered. A strong molecule alignment effect has been obtained in agreement with recent experimental findings. [S1050-2947(98)00702-1].

引用

页码：990 / 996

页数：7

共 43 条

[11] RECOIL IONS [J].

COCKE, CL ;

OLSON, RE .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1991, 205 (04) :153-219

[12] PRODUCTION OF HIGHLY CHARGED LOW-VELOCITY RECOIL IONS BY HEAVY-ION BOMBARDMENT OF RARE-GAS TARGETS [J].

COCKE, CL .

PHYSICAL REVIEW A, 1979, 20 (03) :749-758

[13] Interference effects in collisions between heavy ions and molecular targets [J].

Corchs, SE ;

Busnengo, HF ;

Rivarola, RD ;

McGuire, JH .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1996, 117 (1-2) :41-46

[14] MULTIPLE IONIZATION OF RARE-GASES BY H+ AND HE+ IMPACT [J].

DUBOIS, RD ;

TOBUREN, LH ;

RUDD, ME .

PHYSICAL REVIEW A, 1984, 29 (01) :70-76

[15] 3-D IMAGING OF BINARY DISSOCIATION EVENTS INDUCED BY HEAVY-ION IMPACT [J].

HORVAT, V ;

HEBER, O ;

WATSON, RL ;

PARAMESWARAN, R ;

BLACKADAR, JM .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1995, 99 (1-4) :94-97

[16] Multiple ionization of atoms and molecules in collisions with fast ions: Ion-atom collisions [J].

Kabachnik, NM ;

Kondratyev, VN ;

RollerLutz, Z ;

Lutz, HO .

PHYSICAL REVIEW A, 1997, 56 (04) :2848-2854

[17] THE IMPACT-PARAMETER DEPENDENCE OF ELECTRON STOPPING IN PROTON COLLISIONS WITH GAS AND SOLID ATOMS [J].

KABACHNIK, NM ;

KONDRATEV, VN ;

CHUMANOVA, OV .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1988, 145 (01) :103-116

[18] Impact parameter dependence of electronic energy loss and straggling in fast proton-atom collisions [J].

Kabachnik, NM ;

Chumanov, VY ;

Chumanova, OV .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1996, 111 (3-4) :221-228

[19]

KIRBY KP, 1993, AIP CONF PROC, P48, DOI 10.1063/1.45264

[20] AN EFFICIENT 2ND-ORDER MC SCF METHOD FOR LONG CONFIGURATION EXPANSIONS [J].

KNOWLES, PJ ;

WERNER, HJ .

CHEMICAL PHYSICS LETTERS, 1985, 115 (03) :259-267

← 1 2 3 4 5 →