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Johnson Matthey Technol. Rev., 2016, 60, (1), 29
doi: 10.1595/205651316X689954

The Discoverers of the Isotopes of the Platinum Group of Elements: Update 2016

A deletion of the isotope 209Pt and the inclusion of new isotopes found for Rh and Pd



In the 2012 review (1) the isotope 209Pt was included based on a claim to its discovery by Kurcewiz et al. which was reported in a preprint (2). However when the actual paper was published (3) it was considered that the evidence for 209Pt was unsatisfactory and it was no longer included. Therefore the number of known isotopes for platinum has been amended in Table I. In addition one further isotope each for rhodium and palladium have been identified and are included in Table II and Table III respectively.

Table I

Total Number of Isotopes and Mass Ranges Known for Each Platinum Group Element to 2016

Element Number of known isotopes Known mass number ranges
Ru 40 85–124
Rh 39 89–127
Pd 39 91–129
Os 43 161–203
Ir 42 164–205
Pt 43 166–208
Table II

New Isotope for Rhodium

Mass Number Half-life Decay mode Year of discovery Discoverers Reference
127 20 ms β 2015 Lorusso et al. 4
Table III

New Isotope for Palladium

Mass Number Half-life Decay mode Year of discovery Discoverers Reference
129 31 ms β 2015 Lorusso et al. 4

β: beta or neutron decay for neutron rich nuclides is the emission of an electron and an anti-electron neutrino caused by a neutron in the nucleus decaying to a proton so the mass number of the daughter nuclide remains the same but the atomic number increases by one

References

  1. 1
    J. W. Arblaster, Platinum Metals Rev., 2012, 56, (4), 271 LINK https://www.technology.matthey.com/article/56/4/271-271/
  2. 2
    J. Kurcewicz, F. Farinon, H. Geissel, S. Pietri, C. Nociforo, A. Prochazka, H. Weick, J. S. Winfield, A. Estradé, P. R. P. Allegro, A. Bail, G. Bélier, J. Benlliure, G. Benzoni, M. Bunce, M. Bowry, R. Caballero-Folch, I. Dillmann, A. Evdokimov, J. Gerl, A. Gottardo, E. Gregor, R. Janik, A. Kelić-Heil, R. Knöbel, T. Kubo, Yu. A. Litvinov, E. Merchan, I. Mukha, F. Naqvi, M. Pfützner, M. Pomorski, Zs. Podolyák, P. H. Regan, B. Riese, M. V. Ricciardi, C. Scheidenberger, B. Sitar, P. Spiller, J. Stadlmann, P. Strmen, B. Sun, I. Szarka, J. Taïeb, S. Terashima, J. J. Valiente-Dobón, M. Winkler and Ph. Woods, eprint arXiv:1112.0521v1 [nucl-ex], 2nd December, 2011 LINK http://arxiv.org/abs/1112.0521v1
  3. 3
    J. Kurcewicz, F. Farinon, H. Geissel, S. Pietri, C. Nociforo, A. Prochazka, H. Weick, J. S. Winfield, A. Estradé, P. R. P. Allegro, A. Bail, G. Bélier, J. Benlliure, G. Benzoni, M. Bunce, M. Bowry, R. Caballero-Folch, I. Dillmann, A. Evdokimov, J. Gerl, A. Gottardo, E. Gregor, R. Janik, A. Kelić-Heil, R. Knöbel, T. Kubo, Yu. A. Litvinov, E. Merchan, I. Mukha, F. Naqvi, M. Pfützner, M. Pomorski, Zs. Podolyák, P. H. Regan, B. Riese, M. V. Ricciardi, C. Scheidenberger, B. Sitar, P. Spiller, J. Stadlmann, P. Strmen, B. Sun, I. Szarka, J. Taïeb, S. Terashima, J. J. Valiente-Dobón, M. Winkler and Ph. Woods, Phys. Lett. B, 2012, 717, (4–5), 371 LINK http://dx.doi.org/10.1016/j.physletb.2012.09.021
  4. 4
    G. Lorusso, S. Nishimura, Z. Y. Xu, A. Jungclaus, Y. Shimizu, G. S. Simpson, P.-A. Söderström, H. Watanabe, F. Browne, P. Doornenbal, G. Gey, H. S. Jung, B. Meyer, T. Sumikama, J. Taprogge, Zs. Vajta, J. Wu, H. Baba, G. Benzoni, K. Y. Chae, F. C. L. Crespi, N. Fukuda, R. Gernhäuser, N. Inabe, T. Isobe, T. Kajino, D. Kameda, G. D. Kim, Y.-K. Kim, I. Kojouharov, F. G. Kondev, T. Kubo, N. Kurz, Y. K. Kwon, G. J. Lane, Z. Li, A. Montaner-Pizá, K. Moschner, F. Naqvi, M. Niikura, H. Nishibata, A. Odahara, R. Orlandi, Z. Patel, Zs. Podolyák, H. Sakurai, H. Schaffner, P. Schury, S. Shibagaki, K. Steiger, H. Suzuki, H. Takeda, A. Wendt, A. Yagi and K. Yoshinaga, Phys. Rev. Lett., 2015, 114, (19), 192501 LINK http://dx.doi.org/10.1103/PhysRevLett.114.192501
 

The Author

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.

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