Probing the F-17 + p potential by elastic scattering at near-barrier energies

Proton elastic scattering angular distributions for the reaction F-17 + p, were measured in inverse kinematics over a wide angular range (theta(c.m). = 50 degrees-160 degrees) at two near-barrier energies of 3.5 and 4.3 MeV/u. The optical potential was probed in a phenomenological and microscopic approach. Moreover, total reaction cross-sections were also determined via optical potential analysis and were used as a signature for probing a possible halo structure of this proton-rich nucleus

Probing the F-17 + p potential by elastic scattering at near-barrier energies

Proton elastic scattering angular distributions for the reaction F-17 + p, were measured in inverse kinematics over a wide angular range (theta(c.m). = 50 degrees-160 degrees) at two near-barrier energies of 3.5 and 4.3 MeV/u. The optical potential was probed in a phenomenological and microscopic approach. Moreover, total reaction cross-sections were also determined via optical potential analysis and were used as a signature for probing a possible halo structure of this proton-rich nucleus

Scattering of 11Be by 209Bi at the Coulomb barrier

The angular distribution for the quasi-elastic scattering of the halo nucleus 11Be from 209Bi has been measured at 40 MeV beam energy. The measurement performed with a beam intensity of ~ 104 Hz could be done due to a ~ 4 pi array based on high granularity Si detectors. The 11Be (Sn = 0.504 MeV) angular distribution was found to be nearly equal to that of 9Be (S2 alpha +n = 1.574 MeV), i.e. with quite similar reaction cross section. This means that the influence of low binding energy and/or halo structure onto reaction dynamics has to be better understood

Elastic scattering for the system Be-11+Bi-209 at Coulomb barrier energies

The elastic scattering process for 11Be ions impinging on a 209Bi target was studied in the energy range around the Coulomb barrier. The angular distributions of the 11Be scattered particles were analyzed within the optical model framework in order to evaluate the reaction cross section, which turned out to be much larger than the fusion one, especially in the sub-barrier region. The comparison with the system 9Be + 209Bi showed that the reaction cross section is larger for the reaction 11Be + 209Bi in the energy range around the Coulomb barrier, while they are rather similar at higher bombarding energies. This result suggests that direct processes related to the 11Be halo structure and lower binding energy are more relevant at near-barrier energies

Probing the 17F+p potential by elastic scattering at near-barrier energies

Proton elastic scattering angular distributions for the reaction 17F+p, were measured in inverse kinematics over a wide angular range (θc.m.=50--160-) at two near-barrier energies of 3.5 and 4.3 MeV/u. The optical potential was probed in a phenomenological and microscopic approach. Moreover, total reaction cross-sections were also determined via optical potential analysis and were used as a signature for probing a possible halo structure of this proton-rich nucleus. © 2012 American Physical Society

Measurements of 17F scattering by 208Pb with a new type of large solid angle detector array

A new pixel-structure detector array with a large solid angle coverage has been used for the first time to study the elastic scattering of exotic 17F nuclei from a 208pb target at 90.4 MeV. The experimental data have been analyzed in the framework of the optical model potential and the real and imaginary strong absorption radii have been evaluated. These quantities have been compared with those obtained for the system 19F +208Pb at the same energy in the center of mass frame. The 17F+208Pb reaction cross section is more similar to those of the systems 16,17O+208Pb rather than to the one of the system 19F+208Pb at similar energies: this indicates that in the energy range around the Coulomb barrier the breakup channel is still weak. The exclusive breakup cross section 17F\u219216O+p has been measured for the first time at energy below the Coulomb barrier