12C + 16O Elastic Scattering and Total Reaction Cross Sections Near the Coulomb Barrier

Elastic scattering and total reaction cross sections (via y ray yields) have been measured for 160+ 12C in the c.m. energy range 5� 5-10,0 MeV. Some well-defined structure is observed, with peak widths of order 250 keV. An optical potential which fits peaks in the total reaction cross section is shown to be inadequate to explain the elastic scattering data. Possible reasons for this inconsistency, which imply the need for a more general optical potential, are discussed.

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7Be and 8B reaction dynamics at Coulomb barrier energies

EPJ Web of Conferences ◽

10.1051/epjconf/201818402015 ◽

2018 ◽

Vol 184 ◽

pp. 02015

Author(s):

E. Strano ◽

M. Mazzocco ◽

A. Boiano ◽

C. Boiano ◽

M. La Commara ◽

...

Keyword(s):

Cross Sections ◽

Coulomb Barrier ◽

Reaction Cross Section ◽

Optical Model ◽

Reaction Dynamics ◽

Reaction Cross ◽

Total Reaction Cross Section ◽

Weakly Bound ◽

Total Reaction ◽

Reaction Cross Sections

We investigated the reaction dynamics induced by the 7Be,8B+208Pb collisions at energies around the Coulomb barrier. Charged particles originated by both the col- lisions were detected by means of 6 ΔE-Eres telescopes of a newly developed detector array. Experimental data were analysed within the framework of the Optical Model and the total reaction cross-sections were compared together and with the 6,7Li+208Pb colli-sion data. According to the preliminary results, 7Be nucleus reactivity is rather similar to the 7Li one whereas the 8B+208Pb total reaction cross section appears to be much larger than those measured for reactions induced by the other weakly-bound projectiles on the same target.

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Study of the threshold anomaly effect in the reaction $$^{7}$$Li+$$^{208}$$Pb at energies around the Coulomb barrier

The European Physical Journal A ◽

10.1140/epja/s10050-021-00400-3 ◽

2021 ◽

Vol 57 (3) ◽

Author(s):

E. Vardaci ◽

P. K. Rath ◽

M. Mazzocco ◽

A. Di Nitto ◽

G. La Rana ◽

...

Keyword(s):

Elastic Scattering ◽

Cross Sections ◽

Optical Potential ◽

Reaction Cross ◽

Scattering Data ◽

Breakup Channel ◽

Phenomenological Potential ◽

Relation Analysis ◽

Bombarding Energy ◽

Reaction Cross Sections

AbstractThe elastic scattering in the reaction $$^{7}$$ 7 Li+$$^{208}$$ 208 Pb was investigated in the bombarding energy range from 25 to 39 MeV. The real and imaginary parts of the optical potential were analyzed by using a phenomenological potential. A dispersion relation analysis is presented in order to investigate the threshold anomaly effect. It is concluded that $$^{7}$$ 7 Li has an intermediate behavior between the tightly bound nuclei such as $$^{16}$$ 16 O and the loosely bound nuclei such as $$^{6}$$ 6 Li where the lack of the threshold anomaly is unambiguously observed. Reaction cross sections are also extracted from the elastic scattering data and its comparison with the ones of other systems has been performed to draw hints on the effect of the breakup channel.

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