Spektroskopie der schweren neutronenarmen Kerne "1"8"9Pb und "1"9"9At, sowie des Kerns "5"7Ni und Entwicklung eines Detektors fuer Verdampfungsrestkerne

Abstract

In this thesis the study of prompt #gamma#-transitions in "1"8"9Pb by means of the reaction "1"5"7Gd("3"6Ar,4n) at 173.0 MeV, in "1"9"9At by means of the reaction "1"7"5Lu("2"8Si,4n) at 141.0 MeV, and "5"7Ni by means of the reaction "4"0Ca("2"0Ne,2pn) at 68.0 MeV is described. First the evaporation residue detector is described, which is based on the production of secondary electrons in the passage of the recoils through a thin mylar foil (0.5 respectively 2.0 #mu#m thickness). By means of #gamma#-#gamma# coincidence measurements the transitions could be assigned to the specified nuclei. For the studied nuclei level schemes were established and discussed. For "5"7Ni J"#pi# assignments have been made by means of a DCO analysis. (HSI)Available from TIB Hannover: RA 831(3171) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman