Bonn 2010 – wissenschaftliches Programm
HK 47.5: Vortrag
Donnerstag, 18. März 2010, 15:15–15:30, HG VII
Mass measurements on exotic Cd and Ag nuclei for nuclear structure investigations — •Martin Breitenfeldt — Ernst-Moritz-Arndt-Universität Greifswald
Mass measurements of neutron-rich Cd and Ag isotopes have been performed with the Penning trap mass spectrometer ISOLTRAP. The masses of 112,114−124Ag and 99−109,114,120,122−124,126,128Cd, determined with relative uncertainties between 2·10−8 and 2·10−7, have resulted in significant corrections and improvements of the mass surface. In particular, the mass of 99Cd and 124Ag were previously unknown. In addition, other masses that had to be inferred from Q values of nuclear decays and reactions have now been measured directly. The analysis includes various mass differences, namely the two-neutron separation energies, the applicability of the Garvey-Kelson relations, double differences of masses, δ Vpn, which give empirical proton-neutron interaction strengths, as well as a comparison with recent microscopic calculations. The δ Vpn results reveal that for even-even nuclides around 132Sn the trends are similar to those in the 208Pb region.