Mass measurements beyond the major r-process waiting point 80Zn - Nuclear ExperimentReport as inadecuate




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Abstract: High-precision mass measurements on neutron-rich zinc isotopes 71m,72-81Znhave been performed with the Penning trap mass spectrometer ISOLTRAP. For thefirst time the mass of 81Zn has been experimentally determined. This makes 80Znthe first of the few major waiting points along the path of the astrophysicalrapid neutron capture process where neutron separation energy and neutroncapture Q-value are determined experimentally. As a consequence, theastrophysical conditions required for this waiting point and its associatedabundance signatures to occur in r-process models can now be mapped precisely.The measurements also confirm the robustness of the N = 50 shell closure for Z= 30 farther from stability.



Author: S. Baruah, G. Audi, K. Blaum, M. Dworschak, S. George, C. Guenaut, U. Hager, F. Herfurth, A. Herlert, A. Kellerbauer, H.-J. Kluge

Source: https://arxiv.org/







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