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HK: Physik der Hadronen und Kerne

HK 10: Kernphysik/Spektroskopie

HK 10.8: Vortrag

Montag, 20. März 2006, 18:30–18:45, C

High-accuracy mass measurements of neutron rich Sn and Zn isotopes for the — •A. Herlert¹, S. Baruah², K. Blaum^3,4, P. Delahaye¹, M. Dworschak⁵, S. George^3,4, C. Guénaut⁶, U. Hager⁷, F. Herfurth³, H.-J. Kluge³, M. Marie-Jeanne¹, L. Schweikhard², and C. Yazidjian^3,1 — ¹CERN, Physics Department, 1211 Geneva 23, Switzerland — ²Inst. f. Physik, Universität Greifswald, 17487 Greifswald, Germany — ³GSI, 64291 Darmstadt, Germany — ⁴Inst. f. Physik, Universität Mainz, 55099 Mainz, Germany — ⁵Physiaklisches Institut, Universität Würzburg, 97074 Würzburg Germany — ⁶CSNSM-IN2P3-CNRS, 91405 Orsay-Campus, France — ⁷University of Jyväskylä, Department of Physics, 40014 Jyväskylä, Finland

The atomic masses of neutron rich short-lived isotopes of the elements Zn and Sn have been measured with the triple-trap Penning-trap mass spectrometer ISOLTRAP at ISOLDE/CERN. The zink isotopes have bean measured in a mass range ⁷¹⁻⁸¹Zn and thus new data is available for nuclides in the vicinity of the shell closure N=50. For tin, the isotopes with masses A=127,128,131−134 have been investigated, where the isotope ¹³¹Sn is of special interest, since there is a discrepancy between theoretical predictions and experimental data on the energy of the first isomeric state. The preliminary results are presented and discussed.