Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Electron inelastic mean free paths in biological matter based on dielectric theory and local-field corrections
Δημιουργός/Συγγραφέας:	Emfietzoglou, D. Kyriakou, I. Abril, I. Garcia-Molina, R. [EL] Πετσαλάκης, Ιωάννης Δ.[EN] Petsalakis, Ioannis D. Nikjoo, H. Pathak, A.
Εκδότης:	Elsevier BV, North-Holland
Τόπος έκδοσης:	AMSTERDAM
Ημερομηνία:	2009-01
Γλώσσα:	Αγγλικά
ISSN:	0168-583X
DOI:	10.1016/j.nimb.2008.11.008
Περίληψη:	The inelastic mean free path (IMFP) of electrons with energies up to a few keV is calculated from the dielectric electron-gas theory for densities corresponding to those of biological matter. The effect of the many-body local-field correction on the Lindhard dielectric response function is examined using some of the available analytical approximations to its static limit. We have tested the performance of several Hubbard-type local-field corrections along with the formula proposed by Corradini and co-workers [M. Corradini, R. Del Sole, G. Onida, M. Palumno, Phys. Rev. B 57 (1998) 14569] which is extensively used in connection with the exchange-correlation kernel of time-dependent density functional theory. It is shown that the Lindhard dielectric function provides reasonable estimates of electron IMFPs below about 50 eV, where the majority of semi-empirical dielectric calculations based on the extended-optical-data methodology fail. The use of LFC results in a sizeable reduction of the IMFP which, at low energies, may reach similar to 20%.
Τίτλος πηγής δημοσίευσης:	Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (formerly Part of Nuclear Instruments and Methods in Physics Research)
Τόμος/Κεφάλαιο:	267
Τεύχος:	1
Σελίδες:	45-52
Θεματική Κατηγορία:	[EL] Τεχνολογία (Γενικά)[EN] Technology (General) [EL] Επιστήμη (Γενικά)[EN] Science (General) [EL] Φυσική[EN] Physics
Λέξεις-Κλειδιά:	Inelastic mean free path Dielectric theory Local-field corrections Biological materials Water Instruments & Instrumentation Physics, Atomic, Molecular & Chemical Physics, Nuclear
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2008 Elsevier B.V. All rights reserved.
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://www.elsevier.com/locate/nimb
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο