Discovery of enhanced nuclear stability near the deformed shells [ital N]=162 and [ital Z]=108

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.624· OSTI ID:7253076

Lazarev, Y A; Lobanov, Y V; Oganessian, Y T; Utyonkov, V K; Abdullin, F S; Buklanov, G V; Gikal, B N; Iliev, S; Mezentsev, A N; Polyakov, A N; Sedykh, I M; Shirokovsky, I V; Subbotin, V G; Sukhov, A M; Tsyganov, Y S; Zhuchko, V E ^[1]; Lougheed, R W; Moody, K J; Wild, J F; Hulet, E K ; McQuaid, J H ^[2]

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1. Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)
2. University of California, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

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

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7253076
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:5; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663210 -- Ground-State Radioactivity-- (1992-)
663450 -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663590 -- Nuclear Mass Ranges-- A=220 & Above-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
CHARGED-PARTICLE REACTIONS
CURIUM 248 TARGET
DAYS LIVING RADIOISOTOPES
DECAY
DEFORMED NUCLEI
HALF-LIFE
HEAVY ION REACTIONS
ISOTOPES
MATHEMATICAL MODELS
NEON 22 REACTIONS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
RADIOISOTOPES
SHELL MODELS
STABILITY
TARGETS
YEARS LIVING RADIOISOTOPES