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Delta-electron emission in fast heavy ion ? atom collisions: observations of new phenomena and breakdown of common scaling laws

Autor: R. E. Olson, Carlos O. Reinhold, Gerhard Kraft, C Kelbch, Horst Schmidt-Böcking, K. Ullmann, R Koch, David R. Schultz, S. Hagmann

Publikováno v: Zeitschrift f�r Physik D Atoms, Molecules and Clusters. 22:713-721

Double differential cross sections for the emission of Delta-electrons have been measured in fast uranium-rare gas collisions. The well-known Binary Encounter peak reveals unexpected structures for certain observation angles and its intensity increas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ba6b1ef2b76fd6b58957ded574ce8fd
https://doi.org/10.1007/bf01437253

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Double ionization of helium by high-velocityU90+ions

Autor: J. Ullrich, Siegbert Hagmann, Ottmar Jagutzki, Reinhard Dörner, L. Blumenfeld, Horst Schmidt-Böcking, C Kelbch, T B Quinteros, H. Berg, J. A. Tanis, A. Gonzales, Alfred S. Schlachter, R. D. Dubois, d'Etat B

Publikováno v: Physical Review A. 46:5539-5544

Double ionization of helium is investigated for 60-, 120-, and 420-MeV/u ({ital v}/{ital c}=0.34--0.72)U{sup 90+}-ion impact. The measured double-to-single ionization ratios indicate that, even for these very high velocities, double ionization of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0bbdcc38c3cc10f33e28477d4fba59d2
https://doi.org/10.1103/physreva.46.5539

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Cusp electron emission in 1.4 MeV u-1Xe26+on Ar collisions as a function of the projectile final charge state

Autor: C Kelbch, Y C Chang, C F Chou, C C Hsu, Horst Schmidt-Böcking, R Koch

Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 25:3505-3512

The cusp electron emission as a function of the final projectile charge state has been investigated by an electron-projectile coincidence technique in 1.4 MeV u-1 Xe26+ on Ar collisions. The cusp electron emission production probability varies strong

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::706c60458d2d0c49900ae98d77c6dfe2
https://doi.org/10.1088/0953-4075/25/16/009

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Quasi-discretization of the electron continuum emitted in collisions of 0.6 MeV u-1Au11+with noble gases

Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 25:L287-L293

The authors have measured relative doubly-differential cross sections for electron emission in collisions of 0.6 MeV u-1 Au11+ projectile ions with He, Ne and Ar targets for laboratory electron-detection angles between 17' and 80' and electron energi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fc3cbfb3b4b365b736c41e8d0a70e0db
https://doi.org/10.1088/0953-4075/25/12/003

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°-Electron emission in fast heavy ion atom collisions

Autor: R. E. Olson, R. DuBois, Siegbert Hagmann, Gerhard Kraft, U. Ramm, F. Jiazhen, C. Kelbch, Joachim Ullrich, H. Berg, Horst Schmidt-Böcking

Publikováno v: Advances in Space Research. 12:7-15

Biological damages such as mutations, chromosomal aberrations etc. are consequence of biochemical changes mostly in the DNA /1/. With ionizing radiation, these chemical changes are due to primary ionization events and secondary ionization effects cau

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::591c0c4f2325b729c21ccaf692c520a9
https://doi.org/10.1016/0273-1177(92)90084-b

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Abnormal behaviour of zero degree delta -electron emission on the projectile ionic charge

Autor: A. Gonzalez, T B Quinteros, R E Olson, Horst Schmidt-Böcking, David R. Schultz, S. Hagmann, R Koch, A. Skutlartz, Reinhard Dörner, Ottmar Jagutzki, Patrick Richard, C Kelbch

Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 24:2579-2588

The 0' delta -electron emission was investigated by an electron-projectile coincidence technique as a function of incoming and outgoing projectile charge state for 0.53 MeV u-1 Cuq+ on He. The electron emission spectra vary strongly with initial and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4dda62e89bdc9109a772c73958ab7fb0
https://doi.org/10.1088/0953-4075/24/10/014

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Quantum interference in clothed-ion-atom binary peak structures

Autor: Carlos O. Reinhold, Horst Schmidt-Böcking, C Kelbch, R E Olson, R Koch, David R. Schultz

Publikováno v: Physical Review Letters. 66:1842-1845

An impulse approximation for ionizing collisions of clothed ions with atoms is used to explain the origin of an anomalous oscillation in the ejected electron spectrum in the region of the binary peak. In addition, measurements which evidence this fea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef2533709dc1422a8499dfacf7c3285a
https://doi.org/10.1103/physrevlett.66.1842

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Strong dependence of zero degree binary encounter electron production on the initial and final charge state

Autor: A. Gonzalez, A. Skutlartz, S. Hagmann, S L Varghese, C Kelbch, Patrick Richard, Horst Schmidt-Böcking, Ottmar Jagutzki, T B Quinteros, D. H. Lee

Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 24:1377-1384

Doubly differential cross sections d2 sigma /dEed Omega e and fractional probabilities for binary encounter (BE) electron emission at 0' electron emission angle as a function of initial (qi) and final (qf) projectile charge state have been measured f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::795190456f4248895ee0f4707154fcf1
https://doi.org/10.1088/0953-4075/24/6/023

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The importance of Coulomb focusing on electron capture to the continuum investigated by impact-parameter-dependent electron emission probabilities

Autor: R Koch, Ottmar Jagutzki, A. Skutlartz, Horst Schmidt-Böcking, C Kelbch

Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 24:993-1001

The probabilities for cusp and delta -electron production were measured as a function of the impact parameter and of the outgoing projectile charge state for collisions of 0.5 MeV u-1 H+, He+, He2+ on Ne and He targets. The experimental results for H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5c1a72e75af7155ca9196ccb8ba63f9c
https://doi.org/10.1088/0953-4075/24/5/022

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Coincident charge state production in F6++Ne collisions

Autor: R E Olson, Carlos O. Reinhold, C Kelbch, Horst Schmidt-Böcking, J. Ullrich, S. Kelbch, David R. Schultz

Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 23:3839-3847

Total cross sections are presented for the production of various stages of multiple ionization of the target in coincidence with the final projectile charge state for collisions of F6+ with Ne at 10 and 15 MeV. In particular, the current measurements

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5836284d3b977032b6c95a27db69c019
https://doi.org/10.1088/0953-4075/23/21/017

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