Mg-nat (p,p)

The evaluated differential cross sections [GUR07] are based on the available experimental data for proton elastic scattering from 24Mg [MOO51] and from natural magnesium (78.99% of 24Mg) [RAU88, ZHA03]. Theoretical calculations were made in the frameworks of the R-matrix theory The cross-section for natural magnesium was calculated as a sum of the cross sections for its three stable isotopes weighted by the relative abundance. A significant contribution of the proton resonance scattering from 26Mg to the results obtained for natural magnesium was revealed. The resonance parameters were taken from the compilation [END90]. The theoretical analysis was facilitated by the previous investigation [KOE52] where the energy dependence of the cross section for 24Mg(p,p0)24Mg measured in [MOO51] was interpreted in terms of the combination of Coulomb and nuclear potential scattering with resonant scattering. This resonant scattering arises from the excitation of energy levels of the compound nucleus 25Al. The general trend of the observed cross sections, including resonances, was well reproduced theoretically.The benchmark experiment performed with a thick uniform natural magnesium target (see [GUR07]) supported the results of the evaluation.

[GUR07] A.F. Gurbich, C. Jeynes, Nucl. Instr. and Meth. B 265 (2007) 447.

[MOO51] F.P. Mooring, L.J. Koster, E. Goldberg, D. Saxon, S.G. Kaufmann, Phys. Rev. 84 (1951) 703.

[RAU88] E. Rauhala, M. Luomaj?rvi, Nucl. Instr. and. Meth. B 33 (1988) 628.

[ZHA03] X. Zhang, G. Li, B. Ding, Z. Liu, Nucl. Instr. and Meth. B 201 (2003) 551.

[END90] P.M. Endt, Nucl. Phys. A 521 (1990) 147.

[KOE52] L.J. Koester Jr., Phys. Rev. 85 (1952) 643.

Last update 28-05-2013