Laser-assisted ionization-excitation of helium by electron impact at large momentum transfer

被引：7

作者：

Bulychev, Andrey A. ^{[1
]}

Kouzakov, Konstantin A. ^{[2
]}

机构：

[1] Joint Inst Nucl Res, Theoret Phys Lab, Dubna 141980, Russia

[2] Moscow MV Lomonosov State Univ, Fac Phys, Dept Nucl Phys & Quantum Theory Collis, Moscow 119991, Russia

来源：

EUROPEAN PHYSICAL JOURNAL D | 2014年 / 68卷 / 11期

基金：

俄罗斯基础研究基金会;

关键词：

WAVE-FUNCTIONS; COLLISIONS; ORBITALS; ATOMS; IONS;

D O I：

10.1140/epjd/e2014-50442-6

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Ionization of a helium atom by electron impact in the presence of laser radiation is studied theoretically. The kinematic regime of high impact energy and large momentum transfer is considered. The S-matrix of the process is treated within the first Born and binary-encounter approximations. Triple differential cross sections are calculated for the cases when the residual He+ ion is left both in the ground (n = 1) and in the first excited (n = 2) states in the presence of a laser field with frequency omega = 1.55 eV and intensity I = 5 x 10(11) W/cm(2). The laser-assisted cross sections corresponding to n = 2 are found to be more sensitive to the electron-electron correlations in helium than the field-free ones.

引用

页数：7

共 50 条

[1] Laser-assisted ionization-excitation of helium by electron impact at large momentum transfer
Andrey A. Bulychev
Konstantin A. Kouzakov
The European Physical Journal D, 2014, 68
[2] Electron impact ionization-excitation and double-ionization dynamics of He at large momentum transfer
Watanabe, N.
Takahashi, M.
XXVI INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS, 2009, 194
[3] Laser-assisted electron-impact ionization of atoms at high impact energy and large momentum transfer
Kouzakov, K. A.
Bulychev, A. A.
Popov, Yu V.
Takahashi, M.
XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15, 2012, 388
[4] LASER-ASSISTED ELECTRON-IMPACT EXCITATION OF HELIUM
CHICHKOV, BN
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1990, 23 (13) : L333 - L338
[5] OPTICAL IONIZATION-EXCITATION FUNCTIONS OF HELIUM BY ELECTRON IMPACT
ANDERSON, RJ
LEE, ETP
LIN, CC
PHYSICAL REVIEW, 1967, 160 (01): : 20 - &
[6] Laser-assisted single and double ionization of helium by electron impact
Bulychev, Andrey A.
Kouzakov, Konstantin A.
Vinitsky, Sergey I.
SARATOV FALL MEETING 2014: OPTICAL TECHNOLOGIES IN BIOPHYSICS AND MEDICINE XVI; LASER PHYSICS AND PHOTONICS XVI; AND COMPUTATIONAL BIOPHYSICS, 2015, 9448
[7] Absolute cross sections for the ionization-excitation of helium by electron impact
Bellm, S.
Lower, J.
Weigold, E.
Bray, I.
Fursa, D. V.
Bartschat, K.
Harris, A. L.
Madison, D. H.
PHYSICAL REVIEW A, 2008, 78 (03):
[8] Electron impact ionization-excitation of laser excited barium
Zetner, PW
Hein, J
CORRELATION AND POLARIZATION IN PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS, 2003, 697 : 225 - 230
[9] Laser-assisted singly and doubly ionizing electron-helium collisions at high impact energy and large momentum transfer
Bulychev, Andrew A.
Kouzakov, Konstantin A.
XXIX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2015), PTS 1-12, 2015, 635
[10] Resonance effects in simultaneous electron-impact ionization-excitation of helium
Fang, Yanghua
Bartschat, Klaus
Physical Review A. Atomic, Molecular, and Optical Physics, 2001, 64 (02): : 1 - 020701

← 1 2 3 4 5 →