Eur. Phys. J. A (2007) 32: 349-356
https://doi.org/10.1140/epja/i2007-10387-4

Regular Article - Interdisciplinary Topics

Forward and backward electron emission cross-sections for 23 MeVu^-1 C , Ni and Au projectiles traversing C , Al , Ni , Ag , Au and Bi foils

¹ INFN and Dipartimento di Fisica e Astronomia, Via S. Sofia 64, I-95123, Catania, Italy
² CIRIL-GANIL, (CEA/CNRS/Université de Caen/ENSICAEN), BP 5133, F-14070, Caen Cedex 05, France
³ DAPNIA/SPhN, CEA/Saclay, F-91191, Gif-sur-Yvette Cedex, France
⁴ INFN-LNS, Dipartimento di Fisica e Astronomia, Via S. Sofia 44, I-95123, Catania, Italy

^* e-mail: defilippo@ct.infn.it

Received: 14 January 2007
Accepted: 22 May 2007
Published online: 11 June 2007

Abstract

A rather complete experimental study of forward and backward electron velocity spectra from thin foils bombarded with ions at constant velocity of 30 atomic units (23MeV u^-1) was performed. Three different beams ( ¹²C³⁺ , ⁵⁸Ni¹⁴⁺ and ¹⁹⁷Au³⁶⁺ and six different targets ( ¹²C , ²⁷Al , ^natNi , ^natAg , ¹⁹⁷Au and ²⁰⁹Bi of approximately 90μg cm^-2 thickness were used. This procedure allowed to study the evolution of electron emission (velocity and angular distributions) for the [projectile; target] matrix [ C , Ni , Au ; C , Al , Ni , Ag , Au , Bi ] in a wide angular range. The projectile and target dependence of absolute cross-sections for binary encounter-, Auger- and backward-emitted electrons are analyzed.