caa a22 4500 445865881 CHVBK 20180317145457.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1140/epjd/e2011-10465-1 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-10465-1 Cluster ion emission from LiF induced by MeV Nq+ projectiles and 252Cf fission fragments [Elektronische Daten] [H. Hijazi, L. Farenzena, H. Rothard, Ph. Boduch, P. Grande, E. da Silveira] Ion cluster desorption yields from LiF were measured at PUC-Rio with ≈0.1 MeV/u Nq+ (q = 2,4,5,6) ion beams by means of a time-of-fight (TOF) mass spectrometer. A 252Cf source mounted in the irradiation chamber allows immediate comparison of cluster emissions induced by ≈65 MeV fission fragments (FF). Emission of (LiF)nLi+ clusters are observed for both the N beams and the 252Cf fission fragments. The observed cluster size n varies from 1 to 6 for Nq+ projectiles and from 1 to ≈40 for the 252Cf-FF. The size dependence of the Y(n) distributions suggests two cluster formation regimes: (i) recombination process in the outgoing gas phase after impact and (ii) emission of pre-formed clusters from the periphery of the impact site. The corresponding distribution of ejected negative cluster ions (LiF)nF− closely resembles that of the positive secondary (LiF)nLi+ ions. The desorption yields of positive ions scale as Y(n) ∼ q 5. A calculation with the CASP code shows that this corresponds to a cubic scaling ∼Se3 with the electronic stopping power S e, as predicted by collective shock wave models for sputtering and models involving multiple excitons (Frenkel pair sputtering). We discuss possible interpretations of the functional dependence of the evolution of the cluster emission yield Y(n) with cluster size n, fitted by a number of statistical distributions. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Hijazi H. Centre de Recherche sur les Ions, les Matériaux et la Photonique CIMAP-GANIL (CEA-CNRS-ENSICAEN-UCBN), Boulevard Henri Becquerel, BP 5133, 14070, Caen Cedex 05, France aut Farenzena L. Physics Department, Universidade Federal de Santa Catarina, Florianópolis, Brazil aut Rothard H. Centre de Recherche sur les Ions, les Matériaux et la Photonique CIMAP-GANIL (CEA-CNRS-ENSICAEN-UCBN), Boulevard Henri Becquerel, BP 5133, 14070, Caen Cedex 05, France aut Boduch Ph Centre de Recherche sur les Ions, les Matériaux et la Photonique CIMAP-GANIL (CEA-CNRS-ENSICAEN-UCBN), Boulevard Henri Becquerel, BP 5133, 14070, Caen Cedex 05, France aut Grande P. Instituto de Física, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, 91501-970, Porto Alegre, RS, Brazil aut da Silveira E. Physics Department, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Gávea, 22453-900, Rio de Janeiro, Brazil aut The European Physical Journal D Springer-Verlag 63/3(2011-08-01), 391-400 1434-6060 63:3<391 2011 63 10053 https://doi.org/10.1140/epjd/e2011-10465-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-10465-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hijazi H. Centre de Recherche sur les Ions, les Matériaux et la Photonique CIMAP-GANIL (CEA-CNRS-ENSICAEN-UCBN), Boulevard Henri Becquerel, BP 5133, 14070, Caen Cedex 05, France aut NATIONALLICENCE 700 1- Farenzena L. Physics Department, Universidade Federal de Santa Catarina, Florianópolis, Brazil aut NATIONALLICENCE 700 1- Rothard H. Centre de Recherche sur les Ions, les Matériaux et la Photonique CIMAP-GANIL (CEA-CNRS-ENSICAEN-UCBN), Boulevard Henri Becquerel, BP 5133, 14070, Caen Cedex 05, France aut NATIONALLICENCE 700 1- Boduch Ph Centre de Recherche sur les Ions, les Matériaux et la Photonique CIMAP-GANIL (CEA-CNRS-ENSICAEN-UCBN), Boulevard Henri Becquerel, BP 5133, 14070, Caen Cedex 05, France aut NATIONALLICENCE 700 1- Grande P. Instituto de Física, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, 91501-970, Porto Alegre, RS, Brazil aut NATIONALLICENCE 700 1- da Silveira E. Physics Department, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Gávea, 22453-900, Rio de Janeiro, Brazil aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 63/3(2011-08-01), 391-400 1434-6060 63:3<391 2011 63 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer