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arXiv · 0808.4065

Mass measurements in the vicinity of the rp-process and the nu p-process paths with JYFLTRAP and SHIPTRAP

C. Weber·V. -V. Elomaa·R. Ferrer·C. Fröhlich·D. Ackermann·J. Äystö·G. Audi·L. Batist·K. Blaum·M. Block·A. Chaudhuri·M. Dworschak·S. Eliseev·T. Eronen·U. Hager·J. Hakala·F. Herfurth·F. P. Heßberger·S. Hofmann·A. Jokinen·A. Kankainen·H. -J. Kluge·K. Langanke·A. Martín·G. Martínez-Pinedo·M. Mazzocco·I. D. Moore·J. B. Neumayr·Yu. N. Novikov·H. Penttilä·W. R. Plaß·A. V. Popov·S. Rahaman·T. Rauscher·C. Rauth·J. Rissanen·D. Rodríguez·A. Saastamoinen·C. Scheidenberger·L. Schweikhard·D. M. Seliverstov·T. Sonoda·F. -K. Thielemann·P. G. Thirolf·G. K. Vorobjev
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Abstract

The masses of very neutron-deficient nuclides close to the astrophysical rp- and nu p-process paths have been determined with the Penning trap facilities JYFLTRAP at JYFL/Jyväskylä and SHIPTRAP at GSI/Darmstadt. Isotopes from yttrium (Z = 39) to palladium (Z = 46) have been produced in heavy-ion fusion-evaporation reactions. In total 21 nuclides were studied and almost half of the mass values were experimentally determined for the first time: 88Tc, 90-92Ru, 92-94Rh, and 94,95Pd. For the 95Pdm, (21/2^+) high-spin state, a first direct mass determination was performed. Relative mass uncertainties of typically $δm / m = 5 \times 10^{-8}$ were obtained. The impact of the new mass values has been studied in nu p-process nucleosynthesis calculations. The resulting reaction flow and the final abundances are compared to those obtained with the data of the Atomic Mass Evaluation 2003.

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C. Weber, V. -V. Elomaa, R. Ferrer, C. Fröhlich, D. Ackermann, J. Äystö, G. Audi, L. Batist, K. Blaum, M. Block, A. Chaudhuri, M. Dworschak, S. Eliseev, T. Eronen, U. Hager, J. Hakala, F. Herfurth, F. P. Heßberger, S. Hofmann, A. Jokinen, A. Kankainen, H. -J. Kluge, K. Langanke, A. Martín, G. Martínez-Pinedo, M. Mazzocco, I. D. Moore, J. B. Neumayr, Yu. N. Novikov, H. Penttilä, W. R. Plaß, A. V. Popov, S. Rahaman, T. Rauscher, C. Rauth, J. Rissanen, D. Rodríguez, A. Saastamoinen, C. Scheidenberger, L. Schweikhard, D. M. Seliverstov, T. Sonoda, F. -K. Thielemann, P. G. Thirolf, G. K. Vorobjev. 2008-08-29. Mass measurements in the vicinity of the rp-process and the nu p-process paths with JYFLTRAP and SHIPTRAP. https://doi.org/10.1103/physrevc.78.054310

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