STATISTICAL-ANALYSIS OF CORRELATED RESONANCE PHENOMENA IN 2 SYSTEMS -SI-28-20 AND MG-24+NE-20(NE)

A differentially pumped windowless Ne-20 gas target was used to measur e angle averaged excitation functions for binary decay of the Si-28+Ne -20 reaction into low-lying states of Si-28+Ne-20, Mg-24+Mg-24, and S- 32+O-16, and for binary decay of the Mg-24+Ne-20 reaction into low-lyi ng states of Mg-24+Ne-20 and Si-28+O-16. The Si-28+Ne-20 measurements span the region of excitation energy in Cr-48 from 50.6 to 67.7 MeV (S i-28 beam energies from 87.2 to 128.2 MeV). The reaction Mg-24+Ne-20 w as investigated over a region in Ti-44 from 48.75 to 71.0 MeV (Mg-24 b eam energies from 70.8 to 119.75 MeV). Angular distribution measuremen ts were made for Ne-20(Si-28,Mg-24)Mg-24 at excitation energy=56.22 Me V and for Ne-20(Mg-24,O-16)Si-28 at excitation energy=53.02 and 57.75 MeV. Both systems display evidence of statistically significant correl ated resonance phenomena, but the resonances are dominated by spins co mparable to the grazing angular momenta of the respective entrance cha nnels, and are not analogs of the molecular configurations that domina te the Mg-24(Mg-24, Mg-24)Mg-24* reactions.