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 neutrondeficient 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.
Original language | English |
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Article number | 122501 |
Number of pages | 5 |
Journal | Physical Review Letters |
Volume | 106 |
Issue number | 12 |
DOIs | |
Publication status | Published - 21 Mar 2011 |
Keywords
- NUCLIDES