α-spectroscopy studies of the new nuclides ¹⁶⁵Pt and ¹⁷⁰Hg
Hilton, J.; Uusitalo, J.; Saren, J.; Page, R. D.; Joss, D. T.; AlAqeel, M. A. M.; Badran, H.; Briscoe, A. D.; Calverley, T.; Cox, D. M.; Grahn, T.; Gredley, A.; Greenlees, P. T.; Harding, R.; Herzan, A.; Higgins, I. E.; Julin, R.; Juutinen, S.; Konki, J.; Labiche, M.; Leino, M.; Lewis, M. C.; Ojala, J.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Scholey, C.; Sorri, J.; Sottili, L.; Stolze, S.; Wearing, F. (2019-07-08)
J. Hilton et al. Phys. Rev. C 100, 014305 – Published 8 July 2019. https://doi.org/10.1103/PhysRevC.100.014305
© 2019 American Physical Society.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2019092429673
Tiivistelmä
Abstract
The new nuclides \(^{165}\mathrm{Pt}\) and \(^{170}\mathrm{Hg}\) were produced in the reactions \(^{92}\mathrm{Mo}(^{78}\mathrm{Kr},5n)\) and \(^{96}\mathrm{Ru}(^{78}\mathrm{Kr},4n)\) at bombarding energies of 418 MeV and 390 MeV, respectively. For \(^{170}\mathrm{Hg}\) an α-particle energy of \(E_{α} = 7590(30)\) keV and half-life of \(t_{1/2} = 0.08^{+0.40}_{−0.04}\)ms were deduced, while for \(^{165}\mathrm{Pt}\) the corresponding values were 7272(14) keV and \(0.26^{+0.26}_{−0.09}\)ms. Comparison of the reduced α-decay widths with systematics indicates that both α decays are unhindered. Although combining the measured α-decay Q values with extrapolated masses suggests that both new nuclides are unbound to two-proton emission by more than 1 MeV, their α-decay half-lives are too short for this decay mode to compete. Improved data were also obtained for \(^{166,167}\mathrm{Pt}\), produced via the \(^{96}\mathrm{Ru}(^{78}\mathrm{Kr},α4n)\) and \(^{96}\mathrm{Ru}(^{78}\mathrm{Kr},α3n)\) reactions at bombarding energies of 390 MeV and 418 MeV.
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