Two-photon double ionization of He

被引：100

作者：

Feng, L ^{[1
]}

van der Hart, HW ^{[1
]}

机构：

[1] Queens Univ Belfast, Dept Appl Math & Theoret Phys, Belfast BT7 1NN, Antrim, North Ireland

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2003年 / 36卷 / 01期

关键词：

D O I：

10.1088/0953-4075/36/1/101

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We determine generalized cross sections for two-photon double ionization of He in the photon energy region between 40.7 and 47 eV where absorption of two photons can lead to non-sequential double ionization only. The present cross sections, obtained in R-matrix Floquet theory, agree with cross sections obtained from time-dependent calculations. By examining the ratio of two-photon double ionization to two-photon single ionization, we demonstrate that core excitation effects at an intensity of 10(13) W cm(-2) are relatively unimportant at 45 eV, but that they are significant at other photon energies.

引用

页码：L1 / L7

页数：7

共 18 条

[1] Applications of B-splines in atomic and molecular physics [J].

Bachau, H ;

Cormier, E ;

Decleva, P ;

Hansen, JE ;

Martín, F .

REPORTS ON PROGRESS IN PHYSICS, 2001, 64 (12) :1815-1943

[2]

Burke P., 1991, J PHYS B ATOM MOL PH, V24, P751

[3] Core-excited resonance enhancement in the two-photon complete fragmentation of helium [J].

Colgan, J ;

Pindzola, MS .

PHYSICAL REVIEW LETTERS, 2002, 88 (17) :4-173002

[4] Ratio of cross sections for double to single ionization of He by 85-400 eV photons [J].

Dorner, R ;

Vogt, T ;

Mergel, V ;

Khemliche, H ;

Kravis, S ;

Cocke, CL ;

Ullrich, J ;

Unverzagt, M ;

Spielberger, L ;

Damrau, M ;

Jagutzki, O ;

Ali, I ;

Weaver, B ;

Ullman, K ;

Hsu, CC ;

Jung, M ;

Kanter, EP ;

Sonntag, B ;

Prior, MH ;

Rotenberg, E ;

Denlinger, J ;

Warwick, T ;

Manson, ST ;

SchmidtBocking, H .

PHYSICAL REVIEW LETTERS, 1996, 76 (15) :2654-2657

[5] Double photoionization of doubly exited helium [J].

Feng, Liang ;

Van der Hart, Hugo W. .

Physical Review A - Atomic, Molecular, and Optical Physics, 2002, 66 (03) :314021-314024

[6] Photoionization with excitation and double photoionization of the helium isoelectronic sequence [J].

Kheifets, AS ;

Bray, I .

PHYSICAL REVIEW A, 1998, 58 (06) :4501-4511

[7]

LAULAN S, 2002, P INT C ELECT PHOT I

[8] Photoionization and compton double ionization of helium from threshold to 20 keV [J].

Levin, JC ;

Armen, GB ;

Sellin, IA .

PHYSICAL REVIEW LETTERS, 1996, 76 (08) :1220-1223

[9] Theory and computation of the rate of multiphoton two-electron ionization via the direct mechanism [J].

Mercouris, T ;

Haritos, C ;

Nicolaides, CA .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2001, 34 (19) :3789-3811

[10] Two-electron photoejection of He and H- [J].

Meyer, KW ;

Greene, CH ;

Esry, BD .

PHYSICAL REVIEW LETTERS, 1997, 78 (26) :4902-4905

← 1 2 →