1. IPFN, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela, Portugal
2. National Centre for Nuclear Research, A. Soltana 7, 05-400 Otwock-Swierk, Poland
3. Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw, Poland
4. Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland
5. Instituto de Engenharia de Sistemas de Computadores-Microsistemas e Nanotecnologias (INESC-MN), Rua Alves Redol 9, 1000-029 Lisboa, Portugal