Differential electron scattering from positive ions measured by zero-degree ion-atom spectroscopy
Φόρτωση...
Ημερομηνία
Συγγραφείς
Zouros, T. J. M.
Benis, E. P.
Gorczyca, T. W.
Gonzalez, A. D.
Zamkov, M.
Ricahrd, P.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Recent developments in quasi-free electron scattering from highly charged ions are reported. Results using a high-efficiency zero-degree Auger projectile spectroscopy setup are presented primarily for collisions of H- and He-like boron beams with H, targets. A novel technique for the in situ control and determination of the metastable 1s2s(3)S beam fraction of He-like boron allowed for an accurate determination of absolute double differential scattering cross sections for 180degrees resonant and non-resonant electron scattering from both ground-(1s(2)) and mixed-(1s(2), 1s2s (3)S) B(3+) states. The observed richly structured B(2+) (1s 2l nl') Rydberg series is produced by resonant excitation (RE) from the 1s(2) ground state, while the triply excited B(2+) (2s 2l '2l") hollow ionic states are produced by RE from the 1s 2s (3)S metastable state. The consistency of the method was checked by quasi-free electron scattering from H-like B(4+) ions giving rise to the 2l nl' Rydberg series. Differential R-matrix calculations within the electron scattering model for electron-ion scattering from both H-like and ground state He-like boron were found to be in excellent overall agreement. The production of triply excited (2s 2l' 2l") states by RE was also studied for the Z = 5-9 isoelectronic sequence. These results convincingly demonstrate that large-angle differential scattering cross section measurements, practically impossible to perform with present day crossed or merged electron-ion beam techniques, are amenable to measurement through high resolution electron spectroscopy of ion-atom collisions, providing some of the most sensitive tests of atomic structure and electron-ion scattering calculations. (C) 2003 Elsevier Science B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
electron-ion scattering, quasi-free electron scattering, highly charged ions, hci, zero-degree auger projectile spectroscopy, resonant excitation, he-like ions, r-matrix calculation, resonant transfer excitation, multiply-charged ions, elastic-scattering, cross-sections, dielectronic-recombination, hemispherical analyzer, 2-d psd, inelastic-scattering, angular-distribution, collisions
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000183211200098
http://ac.els-cdn.com/S0168583X03005305/1-s2.0-S0168583X03005305-main.pdf?_tid=75893ed4-4de8-11e3-bc51-00000aacb360&acdnat=1384514835_eed7d4c33ca55412600185356aa9f291
http://ac.els-cdn.com/S0168583X03005305/1-s2.0-S0168583X03005305-main.pdf?_tid=75893ed4-4de8-11e3-bc51-00000aacb360&acdnat=1384514835_eed7d4c33ca55412600185356aa9f291
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών