alpha decay studies of the nuclides Rn-195 and Rn-196 - art. no. 044315

Kettunen, H Uusitalo, J Leino, M Jones, P Eskola, K Greenlees, PT Helariutta, K Julin, R Juutinen, S Kankaanpaa, H Kuusiniemi, P Muikku, M Nieminen, P Rahkila, P

H. Kettunen et al., alpha decay studies of the nuclides Rn-195 and Rn-196 - art. no. 044315, PHYS REV C, 6304(4), 2001, pp. 4315

30

INGLESE

Article

Physics

PHYSICAL REVIEW C

0556-2813 → ACNP

6304

4

2001

ISI

0556-2813(200104)6304:4<4315:ADSOTN>2.0.ZU;2-E

The new neutron deficient nuclide Rn-195 and the nuclide Rn-196 have been p roduced in fusion evaporation reactions using Fe-56 ions on Nd-142 targets. A gas-filled recoil separator was used to separate the fusion products fro m the scattered beam. The activities were implanted in a position sensitive silicon detector. The isotopes were identified using spatial and time corr elations between implants and decays. Two alpha decaying isomeric states, w ith E-alpha = 7536(11) keV [T-1/2 = (6(-2)(+3)) ms] for the ground state an d E-alpha = 7555(11) keV [T-1/2 = (5(-2)(+3)) ms] for an isomeric state wer e identified in 195Rn. In addition, the half-life and alpha decay energy of Rn-196 were measured with improved precision. The reduced widths deduced f or the neutron deficient even-mass Rn isotopes suggest an onset of substant ial deformation at N = 110.