Half-life measurement for the rp-process waiting point nuclide 80Zr
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. © 2000 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Ressler, J., Piechaczek, A., Walters, W., Aprahamian, A., Wiescher, M., Batchelder, J., Bingham, C., Brenner, D., Ginter, T., Gross, C., Grzywacz, R., Kulp, D., Mac Donald, B., Reviol, W., Rikovska, J., Rykaczewski, K., Winger, J., & Zganjar, E. (2000). Half-life measurement for the rp-process waiting point nuclide 80Zr. Physical Review Letters, 84 (10), 2104-2107. https://doi.org/10.1103/PhysRevLett.84.2104