Mass Measurement on the rp-Process Waiting Point Kr72

D. Rodríguez, V. S. Kolhinen, G. Audi, J. Äystö, D. Beck, K. Blaum, G. Bollen, F. Herfurth, A. Jokinen, A. Kellerbauer, H. -J. Kluge, M. Oinonen, H. Schatz, E. Sauvan, and S. Schwarz
Phys. Rev. Lett. 93, 161104 – Published 14 October 2004

Abstract

The mass of one of the three major waiting points in the astrophysical rp process Kr72 was measured for the first time with the Penning trap mass spectrometer ISOLTRAP. The measurement yielded a relative mass uncertainty of δm/m=1.2×107 (δm=8keV). Kr73,74, also needed for astrophysical calculations, were measured with more than 1 order of magnitude improved accuracy. We use the ISOLTRAP masses of Kr7274 to reanalyze the role of Kr72 (T1/2=17.2s) in the rp process during x-ray bursts and conclude that Kr72 is a strong waiting point delaying the burst duration with at least 80% of its β-decay half-life.

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  • Received 19 June 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.161104

©2004 American Physical Society

Authors & Affiliations

D. Rodríguez1,*, V. S. Kolhinen2, G. Audi3, J. Äystö2, D. Beck1, K. Blaum1,4, G. Bollen5, F. Herfurth1, A. Jokinen2, A. Kellerbauer4, H. -J. Kluge1, M. Oinonen6, H. Schatz5,7, E. Sauvan4,†, and S. Schwarz5

  • 1GSI, Planckstraße 1, 64291 Darmstadt, Germany
  • 2University of Jyväskylä, P.O. Box 35, 40351 Jyväskylä, Finland
  • 3CSNSM-IN2P3-CNRS, 91405 Orsay-Campus, France
  • 4CERN, Physics Department, 1211 Geneva 23, Switzerland
  • 5NSCL and Dept. of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1321, USA
  • 6Helsinki Institute of Physics, P.O. Box 64, 00014 University of Helsinki, Finland
  • 7Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824-1321, USA

  • *Present address: IN2P3, LPC-ENSICAEN, 6 Boulevard du Marechal Juin, 14050, Caen Cedex, France. Electronic address: rodriguez@lpccaen.in2p3.fr.
  • Present address: IN2P3, CPPM, 13288 Marseille, France

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Issue

Vol. 93, Iss. 16 — 15 October 2004

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