Eur. Phys. J. A (2007) 32: 35-41
https://doi.org/10.1140/epja/i2007-10365-x

Regular Article - Nuclear Structure and Reactions

Optical potential analysis of proton elastic scattering from ¹²C based on the α-particle model

¹ Department of Physics, Guangxi Normal University, 541004, Guilin, China
² CCAST (World Laboratory), P.O. Box 8730, 100080, Beijing, China
³ Institute of High Energy Physics, Academia Sinica, 100039, Beijing, China

Received: 31 January 2007
Accepted: 13 April 2007
Published online: 7 May 2007

Abstract

Based on an α-particle model of ¹²C, an optical potential for intermediate-energy proton- ¹²C scattering is presented in the framework of the KMT theory. The parameterized proton- ⁴He amplitude, the required basic input for constructing the optical potential, is obtained by fitting the proton- ⁴He scattering data. The differential cross-sections and analyzing powers of the proton- ¹²C elastic scattering at incident energies ranging from 0.2 to 1.0GeV have been calculated by using the obtained optical potential. The main features of the measured angular distributions of the cross-section and the analyzing power can be satisfactorily described. The proton- ¹²C total cross-sections have also been calculated, and the results are in good agreement with the experimental data at energies below 0.6GeV but underestimate the data about 6% at higher energies.