Double Ionization of Helium by Electron-Impact: Complete Pictures of the Four-Body Breakup Dynamics

Dorn, Alexander; Kheifets, Anatoli; Schröter, C. D.; Najjari, B.; Höhr, C.; Moshammer, R.; Ullrich, J.

doi:10.1103/physrevlett.86.3755

Cited by 103 publications

(106 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bethe (1930); Moshammer et al (1997); Stolterfoht et al (1999), Ullrich et al (2000); Dorn et al (2001); Ullrich and Voitkiv (2002) and references therein), has been theoretically explored recently for the first time in terms of FDCSs. The fully relativistic treatment lead to the "important conceptual result, that collisions with minimum momentum transfer, which are often termed the optical limit and are regarded to be closest to photo-absorption (Rudd et al 1992), in fact can never be photon-like".…”

Section: Single Ionisation At Small and Large Perturbationsmentioning

confidence: 99%

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

et al. 2003

View full text Add to dashboard Cite

Recoil-ion and electron momentum spectroscopy is a rapidly developing technique that allows one to measure the vector momenta of several ions and electrons resulting from atomic or molecular fragmentation. In a unique combination, large solid angles close to π Microccopes -the "bubble chambers of atomic physics" -mark the decisive step forward to investigate many-particle quantum-dynamics occurring when atomic and molecular systems or even surfaces and solids are exposed to time-dependent external electromagnetic fields.The present review concentrates on just these latest technical developments and on at least four new classes of fragmentation experiments that have emerged within about the last five years. First, multi-dimensional images in momentum space brought unprecedented information on the dynamics of single-photon induced fragmentation of fixed-in-space molecules and on their structure. Second, a break-through in the investigation of highintensity short-pulse laser induced fragmentation of atoms and molecules has been achieved by using Reaction Microccopes. Third, for electron and ion-impact, the investigation of twoelectron reactions has matured to a state such that first fully differential cross sections (FDCS) are reported. Forth, comprehensive sets of FDCS for single ionisation of atoms by ion-impact, the most basic atomic fragmentation reaction, brought new insight, a couple of surprises and unexpected challenges to theory at keV to GeV collision energies. In addition, a brief summary on the kinematics is provided at the beginning. Finally, the rich future potential of the method is shortly envisaged.2

show abstract

Section: Single Ionisation At Small and Large Perturbationsmentioning

confidence: 99%

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

et al. 2003

View full text Add to dashboard Cite

show abstract

“…Such a deviation from the axial symmetry with respect to q is a signature of second or higher order projectile-target interactions. This effect has been observed before for low momentum transfer collisions [20] and at energies as high as 5.5 keV [23]. Investigations of the total double-to-single ionization cross section ratio also indicate that double collisions contribute for the present primary energy of 2 keV [29].…”

Section: Resultsmentioning

confidence: 65%

“…The kinematics of the reaction covers a range of momentum transfer from the optical limit to high values up to 5 a.u., and a large range of relative emission angles and energy partitions of two slowly ejected electrons (E b,c < 30 eV). The results for small momentum transfer have been discussed previously [20]. In this work the dynamics of double ionization is studied for impulsive collisions with relatively large momentum transfer of |q| = 2 a.u..…”

Section: Introductionmentioning

confidence: 99%

Reply to “Comment on ‘Appearance and disappearance of the second Born effects in the(e,3e)reaction on He’ ”

et al. 2005

Self Cite

View full text Add to dashboard Cite

Abstract:The dynamics of helium double ionization by 2 keV electron impact has been investigated experimentally and theoretically at large momentum transfer of |q| = 2 a.u. Fully resolved fivefold differential cross sections (FDCS) are presented for symmetric and asymmetric energy sharing between the two ejected electrons at excess energies from 10 eV to 40 eV, and for the coplanar as well as the out-of-plane scattering geometries. Experimentally, a multielectron -recoil-ion coincidence technique has been applied and a large part of the final-state momentum-space has been mapped. The presently employed theoretical model treats the interaction between the two slow ejected electrons nonperturbatively using the convergent close coupling (CCC) method, whereas the projectile-target interaction is described in the first Born approximation. The experimental and theoretical FDCS agree well in shape. The cross section is dominated by two pairs of strong peaks. From this pattern it can be concluded that the two-step 1 mechanism which is due to interelectron interaction after a single ionizing collision is the dominant ionisation process for the present kinematics.2

show abstract

“…From the experimental point of view, and starting in the mid-1990s, the development of the cold target recoil ion momentum spectroscopy (COLTRIMS) [6,7,8] technique, has provided a new insight on collision systems since it allowed to perform kinematically complete experiments of collision processes involving photons, ions, and electrons [9,10,11,12]. Following the Frankfurt and Heidelberg groups, this technique has since then been adopted by several laboratories worldwide.…”

Section: Introductionmentioning

confidence: 99%

Fully and double differential cross sections for the single ionization of H₂O by bare ion impact

Fernández-Menchero

Otranto

2014

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

Abstract. A theoretical study of fully differential cross sections for the single ionization of H 2 O by collisions with H + ,p − and He 2+ at an impact energy of 2 and 6 MeV/amu is presented. We work in terms of the Born-3DW model, which considers in the final state a model central potential to represent the interaction of the emitted electron with the molecular core. Results are presented for the lesser bound molecular orbitals (1B 1 , 1B 2 , 2A 1 and 3A 1 ). Doubly differential cross sections in terms of the electron emission angle are also presented for these molecular orbitals, showing a nearly isotropic distribution for the electron energies under consideration.

show abstract

Double Ionization of Helium by Electron-Impact: Complete Pictures of the Four-Body Breakup Dynamics

Cited by 103 publications

References 16 publications

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

Reply to “Comment on ‘Appearance and disappearance of the second Born effects in the(e,3e)reaction on He’ ”

Fully and double differential cross sections for the single ionization of H₂O by bare ion impact

Contact Info

Product

Resources

About

Double Ionization of Helium by Electron-Impact: Complete Pictures of the Four-Body Breakup Dynamics

Cited by 103 publications

References 16 publications

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

Reply to “Comment on ‘Appearance and disappearance of the second Born effects in the(e,3e)reaction on He’ ”

Fully and double differential cross sections for the single ionization of H2O by bare ion impact

Contact Info

Product

Resources

About

Fully and double differential cross sections for the single ionization of H₂O by bare ion impact