Electronic sputtering of LiF by Krypton (10 MeV/u): size dependent energy distributions of Li+(LiF)n clusters

H. Hijazi; H. Rothard; P. Boduch; I. Alzaher; Th. Langlinay; A. Cassimi; F. Ropars; T. Been; J.M. Ramillon; H. Lebius; B. Ban-d’Etat; L.S. Farenzena; E.F. da Silveira

doi:10.1140/epjd/e2012-30252-8

2021 Impact factor 1.611

Atomic, Molecular, Optical and Plasma Physics

Eur. Phys. J. D (2012) 66: 305
https://doi.org/10.1140/epjd/e2012-30252-8

Regular Article

Electronic sputtering of LiF by Krypton (10 MeV/u): size dependent energy distributions of Li+(LiF)_n clusters

H. Hijazi¹, H. Rothard¹^a, P. Boduch¹, I. Alzaher¹, Th. Langlinay¹, A. Cassimi¹, F. Ropars¹, T. Been¹, J.M. Ramillon¹, H. Lebius¹, B. Ban-d’Etat¹, L.S. Farenzena² and E.F. da Silveira³

¹ Centre de Recherche sur les Ions, les Matériaux et la Photonique CIMAP-GANIL (CEA-CNRS-ENSICAEN-UCBN), BP 5133, Boulevard Henri Becquerel, 14070 Caen Cedex 05, France
² Physics Department, Universidade Federal de Santa Catarina, 88040-970 Florianópolis, Brazil
³ Physics Department, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Gávea, 22453-900 Rio de Janeiro, Brazil

^a e-mail: rothard@ganil.fr

Received: 17 April 2012
Received in final form: 23 July 2012
Published online: 4 December 2012

Abstract

A combination of imaging techniques (XY) and time-of-flight (TOF) spectroscopy was used to measure the complete velocity vector of sputtered positive secondary ions in collisions of Kr³³⁺ (10.1 MeV/u) with well-prepared LiF single crystals in the electronic stopping regime. The energy distributions N(E) of the cluster ions (LiF)_nLi⁺ (n ≥ 0) depend on the size of the ejecta: the maximum is slightly shifted towards lower energy with increasing cluster size n. The measured energy distributions of emitted cluster ions can be fitted by a Maxwell-Boltzmann function N(E) = AEexp(−βE). This could be an indication that the processes generating the sputtering are compatible with a thermal origin.