Elastic scattering analysis of16O+208Pbat 793 and 1503 MeV: Test of the closure approximation model

Decoupling of valence neutrons from the core in 16C

“…It showed the same minima as above, however the reduced χ 2 values, even for the best fit, were far worse (6.0). Therefore, we adopted the results determined by using the parameters in [10] and estimated the systematic error from the selection of optical potential set on the basis of the results with [11] by taking the difference of the location of the minima observed with the different parameter sets. Note that the elastic scattering data taken in the present experiment were well reproduced by the optical potential with the parameters in [10].…”

“…Two minima can be clearly seen: a local one at δ M /δ C = 0.67 and an absolute one at a value of 3.1 with reduced χ 2 = 1.6. Another set of optical potential parameters [11]-where the reaction 16 O + 208 Pb was studied at 49.5 A MeV-was used to test the reliability of the deduced ratios of deformation-lengths. It showed the same minima as above, however the reduced χ 2 values, even for the best fit, were far worse (6.0).…”