München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 42: Kernphysik/Spektroskopie

HK 42.2: Gruppenbericht

Donnerstag, 23. März 2006, 14:30–15:00, C

Mass measurements of rare earth radionuclides around 147Ho at SHIPTRAP — •Michael Block — GSI, Planckstrasse 1, 64291 Darmstadt

The Penning trap mass spectrometer SHIPTRAP at GSI Darmstadt was set up for precision mass measurements of heavy radionuclides produced in fusion evaporation reactions and separated by the velocity filter SHIP. Two interesting regions in the chart of nuclides that can be accessed by this production method are the region around the doubly magic 100Sn and the region of elements heavier than uranium. The perspectives based on the present status will be outlined.

Recently, first mass measurements of proton-rich radionuclides around 147Ho, produced in the reaction 92Mo(58Ni,xpyn), were performed with the SHIPTRAP Penning trap mass spectrometer. In this region near the proton drip-line systematic studies of the proton separation energies are an important tool to map the drip-line and to identify ground state proton-emitter. The proton separation energies can be derived from precise mass measurements. Therefore, systematic measurements along isotopic or isotonic chains are foreseen. First results from SHIPTRAP will be presented.