Half-Life Measurement for the rp-Process Waiting Point Nuclide 80Zr

Details Half-Life Measurement for the rp-Process Waiting Point Nuclide 80Zr Half-Life Measurement for the rp-Process Waiting Point Nuclide 80Zr

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrvl..84.2104r&link_type=abstract

Physical Review Letters, Volume 84, Issue 10, March 6, 2000, pp.2104-2107

Astronomy and Astrophysics

Astrophysics

12

Scientific paper

X-ray bursts have been suggested as a possible site for the astrophysical rp-process. The time scale for the process is governed by β-decay half-lives of several even-even N = Z waiting point nuclei, in particular, N = Z = 40 80Zr. A 4.1\(+0.8-0.6\)-s β+/EC half-life for 80Zr was determined by observing delayed 84-keV γ rays depopulating a T1/2 = 4-μs isomer at 312 keV in the daughter 80Y. As this half-life is lower than many previously predicted values, the calculated excessive production of A = 80 nuclides in astrophysical x-ray burst scenarios is reduced, and less extreme conditions are necessary for the production of heavier nuclides.

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