Abstract
Excitation functions (Elab=235-320 MeV) for producing nuclei close to the compound system (evaporation residues) were measured for Ni58,64+ Sn112-124, corresponding to a 20% variation in the compound-nucleus neutron number. A dramatic, order-of-magnitude increase was observed in the maximum cross section as a function of the compound-nucleus neutron neutron excess. The subbarrier energy dependence of the cross sections is well described by an optical-model calculation, but not by the frequently used parabolic approximation.
| Original language | English |
|---|---|
| Pages (from-to) | 1563-1566 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 50 |
| Issue number | 20 |
| DOIs | |
| State | Published - 1983 |
| Externally published | Yes |