Eur. Phys. J. A (2005) 25: 41-43
https://doi.org/10.1140/epjad/i2005-06-164-3

ENAM 2004

Mass measurement on the rp-process waiting point ⁷²Kr

¹ GSI, Planckstraße 1, 64291, Darmstadt, Germany
² University of Jyväskylä, P.O. Box 35, 40351, Jyväskylä, Finland
³ CSNSM-IN2P3-CNRS, 91405, Orsay-Campus, France
⁴ Institute of Physics, University of Mainz, Staudingerweg 7, 55128, Mainz, Germany
⁵ NSCL, Michigan State University, 48824-1321, East Lansing, MI, USA
⁶ Physics Department, CERN, 1211, Geneva, Switzerland
⁷ Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, 00014, Helsinki, Finland
⁸ Joint Institute for Nuclear Astrophysics, Michigan State University, 48824-1321, East Lansing, MI, USA

Received: 13 January 2005
Accepted: 21 April 2005
Published online: 1 July 2005

Abstract

With the aim of improving nucleosynthesis calculations, we performed for the first time, a direct high-precision mass measurement on the waiting point in the astrophysical rp-process ⁷²Kr. We used the ISOLTRAP Penning trap mass spectrometer located at ISOLDE/CERN. The measurement yielded a relative mass uncertainty of δm/m = 1.2×10^-7. In addition, the masses of ⁷³Kr and ⁷⁴Kr were measured directly with relative mass uncertainties of 1.0×10^-7 and 3×10^-8, respectively. We analyzed the role of ⁷²Kr in the rp-process during X-ray bursts using the ISOLTRAP and previous mass values of ^72-74Kr.