TY - GEN TY - GEN T1 - Positron annihilation studies of vacancy-type defects T2 - Report / Helsinki University of Technology. Laboratory of Physics A1 - Hautojärvi, P., 1944- LA - eng PP - Espoo PB - Helsingin teknillinen korkeakoulu YR - 1983 UL - https://kansalliskirjasto.finna.fi/Record/fikka.3263033 NO - Invited paper, Sixth International Conference on Hyperfine Interactions, July 4-8, 1983, Groningen, the Netherlands. ER -