Johnson Matthey Technol. Rev., 2020, 64, (1), 84
The Discoverers of the Isotopes of the Platinum Group of Elements: Update 2020
New isotopes found for Pt
Since the 2018 review (1) one new light isotope of mass 165 (2) and four new heavy isotopes of masses 209 to 212 (3) have been identified for platinum (Table I). The heavy isotopes are only identified as being ‘particle stable’ – that is resistant to proton or neutron decay but all are expected to decay by beta decay in which an electron and anti-electron neutrino are emitted when a neutron in the nucleus decays to a proton, so that the mass number of the daughter isotope remains the same but the atomic number is increased by one. The light isotope decays by alpha decay in which the emittance of a helium four ion means that the daughter isotope mass is four lower than the original parent isotope whilst the atomic number is reduced by two. The half-life is 0.4 ± 0.2 ms normalised from the reported value of 0.26 (−0.09 +0.26) ms.
|Element||Mass number||Year of discovery||Discoverers||Reference|
|Pt||165||2019||Hilton et al.||(2)|
|Pt||209||2018||Zhang et al.||(3)|
|Pt||210||2018||Zhang et al.||(3)|
|Pt||211||2018||Zhang et al.||(3)|
|Pt||212||2018||Zhang et al.||(3)|
- 1. J. W. Arblaster, Johnson Matthey Technol. Rev., 2018, 62, (3), 291 LINK https://www.technology.matthey.com/article/62/3/291-292/
- 2. J. Hilton, J. Uusitalo, J. Sarén, R. D. Page, D. T. Joss, M. A. M. AlAgeel, H. Badran, A. D. Briscoe, T. Calverley, D. M. Cox, T. Grahn, A. Gredley, P. T. Greenlees, R. Harding, A. Herzan, E. Higgins, R. Julin, S. Juutinen, J. Konki, M. Labiche, M. Leino, M. C. Lewis, J. Ojala, J. Pakarinen, P. Papadakis, J. Partanen, P. Rahkila, P. Ruotsalainen, M. Sandzelius, C. Scholey, J. Sorri, L. Sottili, S. Stolze and F. Wearing, Phys. Rev. C, 2019, 100, (1), 014305 LINK https://doi.org/10.1103/PhysRevC.100.014305
- 3. G. Zhang, C. Li, P.-W. Wen, J.-J. Li, X.-X. Xu, B. Li, Z. Liu and F.-S. Zhang, Phys. Rev. C, 2018, 98, (1), 014613 LINK https://doi.org/10.1103/PhysRevC.98.014613
John W. Arblaster is interested in the history of science and the evaluation of the thermodynamic and crystallographic properties of the elements. Now retired, he previously worked as a metallurgical chemist in a number of commercial laboratories and was involved in the analysis of a wide range of ferrous and non-ferrous alloys.