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HK: Physik der Hadronen und Kerne

HK 43: Kernphysik/Spektroskopie VI

HK 43.6: Talk

Thursday, March 20, 2003, 18:00–18:15, A

Accurate mass measurements on Kr isotopes using the Penning trap mass spectrometer ISOLTRAP — •D. Rodríguez¹, G. Audi², D. Beck¹, K. Blaum³, G. Bollen⁴, F. Herfurth³, A. Kellerbauer⁵, H.-J. Kluge¹, V. Kolhinen⁶, E. Sauvan³, S. Schwarz⁴, G. Sikler¹, C. Weber¹, and the ISOLDE Collaboration³ — ¹GSI, Planckstr. 1, 64291 Darmstadt, Germany — ²CSNSM-IN2P3-CNRS, 91405 Orsay-Campus — ³CERN, Division EP-IS, 1211 Geneva 23, Switzerland — ⁴NSCL, Michigan State University, East Lansing MI 48824-1321 — ⁵Sektion Physik, Ludwig-Maximilians-Universität, 85748 Garching, Germany — ⁶Helsinki Institute of Physics, University of Helsinki, P. O. Box 9, 00014 Helsinki, Finland

The masses of several Kr isotopes (^72,73,74,78Kr) were determined with uncertainties below 10keV using the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. Beside their relevence for nuclear structure studies like neutron-proton pairing correlations, ⁷²Kr is of especially importance since it is a waiting point in the atrophysical rp-process. It is well-known, that masses of unstable nuclei are critical nuclear physics parameters for reliable nucleosynthesis calculations in astrophysics. In the case of ^73,74,78Kr the results confirm those obtained in previous experiments at ISOLTRAP, and constitute a remarkable evidence of the reliability of the ISOLTRAP apparatus.