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 |
References
- 1 J. W. Arblaster, Platinum Metals Rev., 2012, 56, (4), 271 LINK https://www.technology.matthey.com/article/56/4/271-271/
- 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 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 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.