Synthesis of a new element with atomic number Z=117

The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes 293117 and 294117 were produced in fusion reactions between 48Ca and 249Bk. Decay chains involving eleven new nuclei were identified by means of the Dubna Gas Filled Recoil Separator. The measured decay proper...

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Veröffentlicht in:	Physical review letters 2010-01, Vol.104 (14)
Hauptverfasser:	Oganessian, Yuri Ts, Abdullin, F. Sh, Bailey, P. D., Benker, D. E., Bennett, M. E., Dmitriev, S., Ezold, Julie G., Hamilton, J. H., Henderson, R., Itkis, M. G., Lobanov, Yu. V., Mezentsev, A. N., Moody, K., Nelson, S. L., Polyakov, A. N., Porter, C. E., Ramayya, A. V., Riley, F. D., Roberto, James B, Ryabinin, M. A., Rykaczewski, Krzysztof Piotr, Sagaidak, R. N., Shaughnessy, D., Shirokovsky, I. V., Stoyer, M., Subbotin, V. G., Sudowe, R., Sukhov, A. M., Tsyganov, Yu. S., Utyonkov, V., Voinov, A. A., Vostokin, G. K., Wilk, P. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	ATOMIC NUMBER CHAINS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DECAY DUBNA ISLANDS NUCLEI STABILITY SYNTHESIS
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Beschreibung
Zusammenfassung:	The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes 293117 and 294117 were produced in fusion reactions between 48Ca and 249Bk. Decay chains involving eleven new nuclei were identified by means of the Dubna Gas Filled Recoil Separator. The measured decay properties show a strong rise of stability for heavier isotopes with Z111, validating the concept of the long sought island of enhanced stability for super-heavy nuclei.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.104.142502