Unexpected, Intermediate Structure at High Level Densities inMg24

Resonance-like structures in10B(10B,?)16O excitation functions

“…Intermediate-structure resonances of possibly high spin have been observed in the ~~176 reaction which appear similar to those recently established in the t~ system [4]. Although weaker than in the well-known azC+lZC system [1], the reported resonances contradict the hitherto accepted understanding [2,3].…”

“…Measurements aiming at an c~ resolution considerably better including on-and off-resonance angular distributions are planned. [4] shows striking similarities. In both cases structure has been observed in the decay of the highly excited continuum of the two strongly deformed sd-shell nuclei ZONe and 24Mg, respectively.…”

“…In both experiments, the entrance channel consists of two odd-odd nuclei with no pronounced s-cluster structure; they lead to comparably high level densities and large numbers of open channels. However, due to the simpler structure of the low-excited states in Z~ compared to ~60, more correlation has been observed between different channels in l~ e)2~ [4]. Moreover, the structure found in this latter reaction appears to consist of fewer components and has also been seen in the t2C+~2C system.…”

“…In particular, it became evident that resonances, although sometimes weak, are much more common in heavyion systems than believed previously. One of the most striking examples, contradicting drastically the above rules, are the resonances observed in the l~176 reaction [4]. This system is characterized by an entrance channel of two different, oddodd nuclei with nonzero spins.…”