J O Newton
Articles written in Pramana – Journal of Physics
Volume 33 Issue 1 July 1989 pp 175-208
Pre-scission particle and gamma-ray emission in heavy-ion-induced fission
An introduction is given to the physics of the equilibrium transition-state model and of dissipative nuclear dynamics. Experimental data on pre-scission particle and gamma-ray emission and their interpretation are reviewed. They appear to indicate overdamped motion of the nuclear fluid. A time scale for compound-nucleus fission of about 30 × 10−21 s or greater is indicated, whilst that for quasi- or fast-fission is somewhat shorter.
Volume 53 Issue 3 September 1999 pp 513-520 Nuclear Reactions At Near And Sub-Barrier Energies
Exploiting barrier distributions to investigate breakup effects in the fusion of 9Be+208Pb
M Dasgupta D J Hinde R D Butt A C Berriman C R Morton J O Newton K Hagino
The availability of precisely measured fusion excitation functions have allowed the determination of experimental fusion barrier distributions. This concept is utilised in 9Be+208Pb reaction, to reliably predict the expected complete fusion cross-sections. However, the measured cross-sections are found to be only 68% of those predicted. The large cross-sections observed for incomplete fusion products support the interpretation that this suppression of fusion is caused by 9Be breaking up into charged fragments before reaching the fusion barrier.
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