Abstract.
With the aim of improving nucleosynthesis calculations, we performed for the first time, a direct high-precision mass measurement on the waiting point in the astrophysical rp-process 72Kr. We used the ISOLTRAP Penning trap mass spectrometer located at ISOLDE/CERN. The measurement yielded a relative mass uncertainty of δm/m = 1.2×10-7. In addition, the masses of 73Kr and 74Kr were measured directly with relative mass uncertainties of 1.0×10-7 and 3×10-8, respectively. We analyzed the role of 72Kr in the rp-process during X-ray bursts using the ISOLTRAP and previous mass values of 72-74Kr.
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Rodrıguez, D., Kolhinen, V.S., Audi, G. et al. Mass measurement on the rp-process waiting point 72Kr. Eur. Phys. J. A 25 (Suppl 1), 41–43 (2005). https://doi.org/10.1140/epjad/i2005-06-164-3
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DOI: https://doi.org/10.1140/epjad/i2005-06-164-3