Investigation of single proton knockout from 26P nucleus on 9Be target at 65 MeV/n beam energy

Core excitation, proton breakup reaction, momentum distribution

Аннотация

Single proton knockout from proton-rich ${}^{26}P$ nucleus has been investigated theoretically at 65 MeV/n beam energy on ${}^{9}Be$ target for stripping and diffraction dissociation mechanisms using Eikonal approximation. The single proton breakup cross sections, longitudinal and transverse momentum distribution of core fragment are calculated using MOMDIS code. Ground as well as recently observed projectile and core excited states are taken into consideration for qualitative examination of their effects on the single proton breakup cross section and full width half maxima (FWHM) width of momentum distribution.The proton breakup cross-section is found decreasing by $(9-15)\mathrm{\%}$ with per MeV core excitation energy and FWHM width of longitudinal momentum distribution is observed increasing by $(5-14)\mathrm{\%}$ with per MeV core excitation energy while the transverse momentum distribution, increases by $(4-11)\mathrm{\%}$ with per MeV core excitation energy. FWHM of longitudinal momentum distributions of different core plus proton bound configuration is used to explore the individual contribution of $s$ and $d$ states to admixed $sd$ state of ${}^{26}P$ nucleus. The contribution of $s$ and $d$ state is found 50\%- 60\% and 50\% - 40\% respectively. Obtained results are found interesting and shows that inclusion of the core and projectile excited states affects the observables significantly.increases by $(4-11)\mathrm{\%}$ with per MeV core excitation energy. FWHM of longitudinal momentum distributions of different core plus proton bound configuration is used to explore the individual contribution of $s$ and $d$ states to admixed $sd$ state of ${}^{26}P$ nucleus. The contribution of $s$ and $d$ state is found 50\%- 60\% and 50\% - 40\% respectively. Obtained results are found interesting and shows that inclusion of the core and projectile excited states affects the observables significantly. increases by $(4-11)\mathrm{\%}$ with per MeV core excitation energy. FWHM of longitudinal momentum distributions of different core plus proton bound configuration is used to explore the individual contribution of $s$ and $d$ states to admixed $sd$ state of ${}^{26}P$ nucleus.The contribution of $s$ and $d$ state is found 50\%- 60\% and 50\% - 40\% respectively. Obtained results are found interesting and shows that inclusion of the core and projectile excited states affects the observables significantly.