Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Kh. Khayyat"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 192:63-66
This paper describes techniques being used at the University of Missouri-Rolla for the purpose of obtaining differential ionization information for positron impact. Data are presented for single and multiple ionization of argon as a function of energ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a693f90c29c048e952e807e1a8beacf1
https://doi.org/10.1016/s0168-583x(02)00707-3
https://doi.org/10.1016/s0168-583x(02)00707-3
Autor:
Yajun Zhou, C. Lloyd, Cm M. Doudna, M. Kahveci, Kh. Khayyat, Robert D. DuBois, Don H. Madison
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 34:L783-L789
Experimental data, as a function of projectile energy loss, are presented for single, double and triple ionization of argon by 750 eV positrons. These differential ionization yields are for positrons scattered into a forward cone of angles between 0
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b70aadc8bfb19d07296c035f414a37a
https://doi.org/10.1088/0953-4075/34/24/105
https://doi.org/10.1088/0953-4075/34/24/105
Autor:
C. L. Cocke, Hans Jürgen Lüdde, Ottmar Jagutzki, Kh. Khayyat, V. Mergel, Thorsten Weber, M. Achler, Reinhard Dörner, Horst Schmidt-Böcking
Publikováno v:
Physical Review Letters. 86:2257-2260
The four-particle process of proton-helium transfer ionization has been studied using cold target recoil ion momentum spectroscopy to measure the momenta of all three particles in the final state. Most of the electrons are emitted in the H0 scatterin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67e2d807cf3a43ad3baa126e095c1ea3
https://doi.org/10.1103/physrevlett.86.2257
https://doi.org/10.1103/physrevlett.86.2257
Autor:
V. Mergel, A. Gonzalez, F. Afaneh, Kh. Khayyat, Th. Weber, Reinhard Dörner, A. L. Landers, C. L. Cocke, Ottmar Jagutzki, Horst Schmidt-Böcking, L. Schmidt
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 33:3331-3344
The dynamics of singly ionizing proton-helium collisions have been studied experimentally for several energies of the projectile (0.2, 0.5, 1.0 and 1.3 MeV) with the technique of cold target recoil-ion momentum spectroscopy (COLTRIMS). The complete f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0655a9368805012beb0bede42ee43552
https://doi.org/10.1088/0953-4075/33/17/313
https://doi.org/10.1088/0953-4075/33/17/313
Autor:
Lutz Spielberger, H. Bräuning, I. Ali, Ottmar Jagutzki, K. Ullmann, K.O. Groeneveld, S. Nüttgens, Kh. Khayyat, Siegbert Hagmann, R. Moshammer, Reinhard Dörner, Horst Schmidt-Böcking, T. Vogt, C. L. Cocke, V. Mergel, J. Ullrich
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 149:490-500
A multi-hit detector system has been developed capable of measuring the complete momentum vectors of all ionic fragments after the dissociation of complex molecules induced by photon, electron or ion impact. The fragments are collected in an electros
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2b16cfbb5f21ba7eadc23726ac1f92b
https://doi.org/10.1016/s0168-583x(98)00916-1
https://doi.org/10.1016/s0168-583x(98)00916-1
Autor:
S. F. C. O’Rourke, P Aggerholm, Ottmar Jagutzki, Th. Weber, R. E. Olson, V. Mergel, E Uggerhoej, Kh. Khayyat, Reinhard Dörner, R. Moshammer, James H. McGuire, V D Rodríguez, Joachim Ullrich, Lutz Spielberger, W. Schmitt, Helge Knudsen, U. Meyer, Horst Schmidt-Böcking, M. Achler, U. Mikkelsen, P. D. Fainstein, S P Moeller
Publikováno v:
Khayyat, K, Weber, P, Dorner, R, Achler, M, Mergel, V, Spielberger, L, Jagutzki, O, Meyer, U, Ullrich, J, Moshammer, R, Schmitt, W, Knudsen, H, Mikkelsen, U, Aggerholm, P, Uggerhøj, E, Møller, S P, Rodriguez, V D, O'Rourke, S F C, Olson, R E, Fainstein, P D, McGuire, J H & Schmidt-Bocking, H 1999, ' Differential cross sections in antiproton-and proton-helium collisions ', J. Phys. B: At. Mol. Opt. Phys., vol. 32, pp. 73-79 .
Cross sections are presented for the first time for antiproton-helium collisions at an energy of 945 keV differential in longitudinal electron and recoil-ion momenta. The longitudinal momentum distributions for antiproton impact are compared with 1 M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af252756dde73c94ed0ea46125df9f91
https://doi.org/10.1088/0953-4075/32/4/002
https://doi.org/10.1088/0953-4075/32/4/002
Autor:
J. P. Grandin, B. Bapat, Rido Mann, R. Moshammer, H. Kollmus, Joachim Ullrich, W. Schmitt, Lamri Adoui, Th. Weber, Kh. Khayyat, Reinhard Dörner, S Keller, Amine Cassimi
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 32:1859-1872
Double ionization of helium in the perturbative regime has been explored in a kinematically complete collision experiment using 100 MeV/u C 6+ ions. Different ionization mechanisms are identified by inspecting the angular distribution of the electron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c6a5d749346995363f92204ebef8de5
https://doi.org/10.1088/0953-4075/32/8/307
https://doi.org/10.1088/0953-4075/32/8/307
Autor:
V. Mergel, Kh. Khayyat, Reinhard Dörner, B Nyström, V. Zoran, Yohko Awaya, James M. Feagin, Yoshiro Azuma, Horst Schmidt-Böcking, James H. McGuire, M. Achler, Tadashi Kambara, Jamal Berakdar, Lutz Spielberger
Publikováno v:
Physical Review Letters. 80:5301-5304
The angular and energy dependence of circular dichroism in photo-double-ionization of helium at a photon energy of 99thinspeV is investigated. Using cold target recoil ion momentum spectroscopy the absolute fivefold differential cross section has bee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5dc52138d194267ce126563e13f4474
https://doi.org/10.1103/physrevlett.80.5301
https://doi.org/10.1103/physrevlett.80.5301
Autor:
Henrik Cederquist, J. Euler, M. Unverzagt, C. L. Cocke, S. Nüttgens, Lutz Spielberger, V. Mergel, S. Lencinas, M. Achler, C. J. Wood, A. Salin, Kh. Khayyat, Rami Ali, Reinhard Dörner, Joachim Ullrich, R E Olson, Ottmar Jagutzki, Horst Schmidt-Böcking, W. Wu, Dž. Belkić
Publikováno v:
Physical Review Letters. 79:387-390
We have performed a kinematically complete experiment for the transfer ionization reaction 0.15{endash}1.4 MeV p+He{r_arrow}H{sup 0}+He{sup 2+} +e{sup {minus}} by measuring the three-dimensional momentum vector of the He{sup 2+} ion in coincidence wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fafb24679280fd50f72883541502bab
https://doi.org/10.1103/physrevlett.79.387
https://doi.org/10.1103/physrevlett.79.387
Autor:
Lutz Spielberger, Joachim Ullrich, Ottmar Jagutzki, V. Mergel, W. Schmitt, Kh. Khayyat, R. E. Olson, C. L. Cocke, James M. Feagin, M. Achler, Reinhard Dörner, H. Bräuning, M. H. Prior, Horst Schmidt-Böcking, T. Vogt, H. Khemliche, M. Unverzagt, R. Moshammer, Th. Weber
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 124:225-231
Cold Target Recoil Ion Momentum Spectroscopy allows the detection of the three-dimensional momentum vector of the recoiling product ion from ion, electron or photon atom collisions with 4π solid angle and high resolution. It can be combined with lar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d857ea840d604e00c6bead9f702b9a3f
https://doi.org/10.1016/s0168-583x(96)00877-4
https://doi.org/10.1016/s0168-583x(96)00877-4