Core-excited resonance enhancement in the two-photon complete fragmentation of helium

被引：111

作者：

Colgan, J ^{[1
]}

Pindzola, MS ^{[1
]}

机构：

[1] Auburn Univ, Dept Phys, Auburn, AL 36849 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.88.173002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A time-dependent close-coupling method is used to calculate, for the first time, fully differential cross sections for the complete fragmentation of helium by two photons. Surprising differences in the magnitude of the total-integral cross sections are found in comparisons with other calculations. These differences are found to be due to a core-excited resonance enhancement of the two-photon process for both single and double ionization. These calculations provide theoretical support for ground-breaking measurements expected to be obtained from free-electron laser experiments in the near future.

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页码：4 / 173002

页数：4

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共 22 条

[1] First observation of self-amplified spontaneous emission in a free-electron laser at 109 nm wavelength [J].

Andruszkow, J ;

Aune, B ;

Ayvazyan, V ;

Baboi, N ;

Bakker, R ;

Balakin, V ;

Barni, D ;

Bazhan, A ;

Bernard, M ;

Bosotti, A ;

Bourdon, JC ;

Brefeld, W ;

Brinkmann, R ;

Buhler, S ;

Carneiro, JP ;

Castellano, M ;

Castro, P ;

Catani, L ;

Chel, S ;

Cho, Y ;

Choroba, S ;

Colby, ER ;

Decking, W ;

Den Hartog, P ;

Desmons, M ;

Dohlus, M ;

Edwards, D ;

Edwards, HT ;

Faatz, B ;

Feldhaus, J ;

Ferrario, M ;

Fitch, MJ ;

Flöttmann, K ;

Fouaidy, M ;

Gamp, A ;

Garvey, T ;

Gerth, C ;

Geitz, M ;

Gluskin, E ;

Gretchko, V ;

Hahn, U ;

Hartung, WH ;

Hubert, D ;

Hüning, M ;

Ischebek, R ;

Jablonka, M ;

Joly, JM ;

Juillard, M ;

Junquera, T ;

Jurkiewicz, P .

PHYSICAL REVIEW LETTERS, 2000, 85 (18) :3825-3829

[2] MULTI-PHOTON IONIZATION PROBABILITIES OF MULTIPLE CONTINUA IN ALKALI ATOMS [J].

AYMAR, M ;

CRANCE, M .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1981, 14 (19) :3585-3601

[3] Absolute triple differential cross sections for photo-double ionization of helium -: experiment and theory [J].

Bräuning, H ;

Dörner, R ;

Cocke, CL ;

Krässig, B ;

Kheifets, AS ;

Bray, I ;

Bräuning-Demain, A ;

Carnes, K ;

Dreuil, S ;

Mergel, V ;

Richard, P ;

Ullrich, J ;

Schmidt-Böcking, H .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (23) :5149-5160

[4] Differential cross sections for photo-double-ionization of the helium atom [J].

Briggs, JS ;

Schmidt, V .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2000, 33 (01) :R1-R48

[5] Fully quantal (γ, 2e) calculations for absolute differential cross sections of helium [J].

Colgan, J ;

Pindzola, MS ;

Robicheaux, F .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2001, 34 (15) :L457-L466

[6] Fine structure continuum cross section ratios in the two-photon ionization of rubidium using elliptically polarized light [J].

Colgan, J ;

Pindzola, MS .

PHYSICAL REVIEW LETTERS, 2001, 86 (10) :1998-2001

[7] Fully differential cross sections for double photoionization of he measured by recoil ion momentum spectroscopy [J].

Dorner, R ;

Feagin, JM ;

Cocke, CL ;

Brauning, H ;

Jagutzki, O ;

Jung, M ;

Kanter, EP ;

Khemliche, H ;

Kravis, S ;

Mergel, V ;

Prior, MH ;

SchmidtBocking, H ;

Spielberger, L ;

Ullrich, J ;

Unversagt, M ;

Vogt, T .

PHYSICAL REVIEW LETTERS, 1996, 77 (06) :1024-1027

[8] Angular distributions for double ionization of Li- by an ultrashort, intense laser pulse [J].

Kamta, GL ;

Starace, AF .

PHYSICAL REVIEW LETTERS, 2001, 86 (25) :5687-5690

[9] Application of the CCC method to the calculation of helium double-photoionization triply differential cross sections [J].

Kheifets, AS ;

Bray, I .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (10) :L447-L453

[10] Electron energy spectra from intense laser double ionization of helium [J].

Lafon, R ;

Chaloupka, JL ;

Sheehy, B ;

Paul, PM ;

Agostini, P ;

Kulander, KC ;

DiMauro, LF .

PHYSICAL REVIEW LETTERS, 2001, 86 (13) :2762-2765