Génévriez, Matthieu
[ETH Zürich]
Defrance, Pierre
[UCL]
Jureta, Jozo
[UCL]
Urbain, Xavier
[UCL]
We report on the experimental determination of absolute, total cross sections for electron-impact double ionization of helium in its metastable 1s2s 3S state and of the helium negative ion He(1s2s2p 4P). Cross sections are measured for impact energies ranging from threshold to 1000 eV using the animated crossed beams technique. The fast, pure beam of metastable helium required for the experiment is produced by photodetachment of fast He ions. Results for He(1s2s 3S) are compared to those for He(1s2 1S), and exhibit similar magnitude and behaviour. The cross section for He is large compared to other negative ions and indicates the predominance of indirect ionization channels at large impact energies.
- Hahn M., Müller A., Savin D. W., Electron-impact Multiple-ionization Cross Sections for Atoms and Ions of Helium through Zinc, 10.3847/1538-4357/aa9276
- Dorn A., Moshammer R., Schröter C. D., Zouros T. J. M., Schmitt W., Kollmus H., Mann R., Ullrich J., Double Ionization of Helium by Fast Electron Impact, 10.1103/physrevlett.82.2496
- Taouil I., Lahmam-Bennani A., Duguet A., Avaldi L., Fully Determined (e,3e) Experiments for the Double Ionization of Helium, 10.1103/physrevlett.81.4600
- Dal Cappello C., El Mkhanter R., Hervieux P. A., Mechanisms of double ionization of atoms by electron impact, 10.1103/physreva.57.r693
- Dorn A., Kheifets A., Schröter C. D., Najjari B., Höhr C., Moshammer R., Ullrich J., Double Ionization of Helium by Electron-Impact: Complete Pictures of the Four-Body Breakup Dynamics, 10.1103/physrevlett.86.3755
- Berakdar J., Lahmam-Bennani A., Dal Cappello C., The electron-impact double ionization of atoms: an insight into the four-body Coulomb scattering dynamics, 10.1016/s0370-1573(02)00515-x
- Pindzola M S, Robicheaux F, Colgan J, Electron-impact double ionization of H−, 10.1088/0953-4075/39/6/l04
- Liu Pengfei, Zeng Jiaolong, Yuan Jianmin, A practical theoretical formalism for atomic multielectron processes: direct multiple ionization by a single auger decay or by impact of a single electron or photon, 10.1088/1361-6455/aab195
- Shah M B, Elliott D S, McCallion P, Gilbody H B, Single and double ionisation of helium by electron impact, 10.1088/0953-4075/21/15/019
- Bahati E, Cherkani-Hassani H, Defrance P, Jureta J J, Kereselidze T, Machavariani Z, Noselidze I, On the behaviour of the (e, 3e) total cross section for helium at high and intermediate energies, 10.1088/0953-4075/38/8/015
- A. Kramida,
Y. Ralchenko,
J. Reader,
NIST ASD Team, NIST Atomic Spectra Database
(2016),
http://www.nist.gov/pml/data/asd.cfm
- Hodgman S. S., Dall R. G., Byron L. J., Baldwin K. G. H., Buckman S. J., Truscott A. G., Metastable Helium: A New Determination of the Longest Atomic Excited-State Lifetime, 10.1103/physrevlett.103.053002
- Reinhed P., Orbán A., Werner J., Rosén S., Thomas R. D., Kashperka I., Johansson H. A. B., Misra D., Brännholm L., Björkhage M., Cederquist H., Schmidt H. T., Precision Lifetime Measurements ofHe−in a Cryogenic Electrostatic Ion-Beam Trap, 10.1103/physrevlett.103.213002
- Kristensen P., Pedersen U. V., Petrunin V. V., Andersen T., Chung K. T., Binding energy of the metastableHe−ion, 10.1103/physreva.55.978
- Génévriez Matthieu, Jureta Jozo J., Defrance Pierre, Urbain Xavier, Absolute cross section for electron-impact ionization of
He(1s2sS3), 10.1103/physreva.96.010701
- Lecointre J, Belic D S, Cherkani-Hassani H, Jureta J J, Defrance P, A crossed-beam experiment for electron impact ionization and dissociation of molecular ions: its application to CO+, 10.1088/0953-4075/39/16/011
- T.J. Gay, in
Atomic, Molecular, and Optical Physics: Atoms and Molecules, edited by
F. Dunning,
R.G. Hulet
(Academic Press,
1996), Vol. 29, Part B, Chap. 6, pp. 95–114
- Defrance P, Brouillard F, Claeys W, Wassenhove G Van, Crossed beam measurement of absolute cross sections: an alternative method and its application to the electron impact ionisation of He+, 10.1088/0022-3700/14/1/012
- Zambra M, Belic D, Defrance P, Yu D J, Electron impact double ionization of singly charged ions C+, N+, O+, F+and Ne+, 10.1088/0953-4075/27/11/029
- Emmanouilidou A, Schneider T, Rost J-M, Quasiclassical double photoionization from the 21,3S excited states of helium including shake-off, 10.1088/0953-4075/36/13/303
- Byron F. W., Joachain Charles J., Multiple Ionization Processes in Helium, 10.1103/physrev.164.1
- Samson J. A. R., Stolte W. C., He Z.-X., Cutler J. N., Lu Y., Bartlett R. J., Double photoionization of helium, 10.1103/physreva.57.1906
- Bélenger C, Defrance P, Salzborn E, Shevelko V P, Tawara H, Uskov D B, Double ionization of neutral atoms, positive and negative ions by electron impact, 10.1088/0953-4075/30/11/017
- Rost Jan-Michael, Pattard Thomas, Universal shape function for the double-ionization cross section of negative ions by electron impact, 10.1088/0953-4075/32/15/107
- RUDGE M. R. H., Theory of the Ionization of Atoms by Electron Impact, 10.1103/revmodphys.40.564
- Bethe Hans A., Salpeter Edwin E., Quantum Mechanics of One- and Two-Electron Atoms, ISBN:9780306200229, 10.1007/978-1-4613-4104-8
| Bibliographic reference |
Génévriez, Matthieu ; Defrance, Pierre ; Jureta, Jozo ; Urbain, Xavier. Absolute total cross sections for electron-impact double ionization of He(1s2s3S) and He−(1s2s2p4P). In: The European Physical Journal D, Vol. 73, no.2, p. 73-30 (2019) |
| Permanent URL |
http://hdl.handle.net/2078.1/213456 |
