Skip to Main content Skip to Navigation
Journal articles

Mass measurements of very neutron-deficient Mo and Tc isotopes and their impact on rp process nucleosynthesis

E. Haettner D. Ackermann G. Audi 1 K. Blaum M. Block S. Eliseev T. Fleckenstein F. Herfurth F. P. Heßberger S. Hofmann J. Ketelaer J. Ketter H.-J. Kluge G. Marx M. Mazzocco Yu. N. Novikov W. R. Plaß S. Rahaman T. Rauscher D. Rodríguez H. Schatz C. Scheidenberger L. Schweikhard B. Sun P. G. Thirolf G. Vorobjev M. Wang C. Weber
1 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Abstract : The masses of ten proton-rich nuclides, including the N=Z+1 nuclides 85-Mo and 87-Tc, were measured with the Penning trap mass spectrometer SHIPTRAP. Compared to the Atomic Mass Evaluation 2003 a systematic shift of the mass surface by up to 1.6 MeV is observed causing significant abundance changes of the ashes of astrophysical X-ray bursts. Surprisingly low alpha-separation energies for neutron-deficient Mo and Tc are found, making the formation of a ZrNb cycle in the rp process possible. Such a cycle would impose an upper temperature limit for the synthesis of elements beyond Nb in the rp process.
Document type :
Journal articles
Complete list of metadatas
http://hal.in2p3.fr/in2p3-00596112
Contributor : Christine Hadrossek <>
Submitted on : Thursday, May 26, 2011 - 3:25:09 PM
Last modification on : Wednesday, September 16, 2020 - 4:17:46 PM

Links full text

arxiv

Identifiers

Collections

IN2P3 | CSNSM | CNRS

Citation

E. Haettner, D. Ackermann, G. Audi, K. Blaum, M. Block, et al.. Mass measurements of very neutron-deficient Mo and Tc isotopes and their impact on rp process nucleosynthesis. Physical Review Letters, American Physical Society, 2011, 106 (12), pp.122501 ⟨10.1103/PhysRevLett.106.122501⟩. ⟨in2p3-00596112⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

86