Journalartikel

Jahr der Veröffentlichung: 2011

Zeitschrift: Physical Review Letters

Bandnummer: 106

Heftnummer: 12

ISSN: 0031-9007

eISSN: 1079-7114

Open Access Status: Green

DOI Link: https://doi.org/10.1103/PhysRevLett.106.122501

Verlag: American Physical Society

Abstract: 
The masses of ten proton-rich nuclides, including the N = Z + 1 nuclides Mo-85 and Tc-87, 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.

Harvard-Zitierstil: Haettner, E., Ackermann, D., Audi, G., Blaum, K., Block, M., Eliseev, S., et al. (2011) Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis, Physical Review Letters, 106(12), Article 122501. https://doi.org/10.1103/PhysRevLett.106.122501

APA-Zitierstil: Haettner, E., Ackermann, D., Audi, G., Blaum, K., Block, M., Eliseev, S., Fleckenstein, T., Herfurth, F., Hessberger, F., Hofmann, S., Ketelaer, J., Ketter, J., Kluge, H., Marx, G., Mazzocco, M., Novikov, Y., Plass, W., Rahaman, S., Rauscher, T., ...Weber, C. (2011). Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis. Physical Review Letters. 106(12), Article 122501. https://doi.org/10.1103/PhysRevLett.106.122501