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Tübingen 2003 – scientific programme

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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 Collaboration31GSI, 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.

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