Discovery of Enhanced Nuclear Stability near the Deformed Shells <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>N</mi><mo>=</mo><mn>162</mn><mn></mn></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Z</mi><mo>=</mo><mn>108</mn><mn></mn></math></span>

Yu. A. Lazarev; Yu. V. Lobanov; Yu. Ts. Oganessian; V. K. Utyonkov; F. Sh. Abdullin; G. V. Buklanov; B. N. Gikal; S. Iliev; A. N. Mezentsev; A. N. Polyakov; I. M. Sedykh; I. V. Shirokovsky; V. G. Subbotin; A. M. Sukhov; Yu. S. Tsyganov; V. E. Zhuchko; R. W. Lougheed; K. J. Moody; J. F. Wild; E. K. Hulet; J. H. McQuaid

doi:10.1103/PhysRevLett.73.624

Discovery of Enhanced Nuclear Stability near the Deformed Shells $N = 162$ and $Z = 108$

Yu. A. Lazarev, Yu. V. Lobanov, Yu. Ts. Oganessian, V. K. Utyonkov, F. Sh. Abdullin, G. V. Buklanov, B. N. Gikal, S. Iliev, A. N. Mezentsev, A. N. Polyakov, I. M. Sedykh, I. V. Shirokovsky, V. G. Subbotin, A. M. Sukhov, Yu. S. Tsyganov, V. E. Zhuchko, R. W. Lougheed, K. J. Moody, J. F. Wild, E. K. Hulet, and J. H. McQuaid

Phys. Rev. Lett. 73, 624 – Published 1 August 1994

Abstract

In bombardments of ${}^{248}{Cm}$ with ${}^{22}{Ne}$ we discovered two new isotopes, ${}^{265}106$ and ${}^{266}106$ , by establishing genetic links between their $α$ decays and spontaneous fussion (SF) or $α$ decays of the daughter nuclides. We measured $E_{α} = 8.63 \pm 0.05$ MeV for ${}^{266}106$ and a half-life of 1.2 s for its daughter ${}^{262}104$ . For ${}^{265}106$ we measured $E_{α} = 8.71 to 8.91$ MeV. From these $α$ energies we estimated $α$ half-lives of 10-30 s for ${}^{266}106$ and 2-30 s for ${}^{265}106$ . We estimated SF branches of 50% or less for both isotopes. The decay properties of ${}^{266}106$ establish the existence of enhanced nuclear stability near the predicted deformed shells $N = 162$ and $Z = 108$ .