A method for determination of the s orbital component of Be-12 ground state

The ambiguity of the structure of 12Be especially in the configuration of Be ground state has attracted a lot of attention recently.We notice that the nuclear reaction cross section or at low energy region is sensitive to the surface structure of 12Be,which is greatly impacted by the ground state configuration of 12Be especially by the occupancy probability of the s orbital component.By using existed interaction cross section data of 12Be on C at 790 MeV/nucleon and Glauber model,the upper limit of the s orbital occupation probability of 12Be ground state is roughly determined to be about 56%with Single Particle Model calculations.This demonstrates that the method is very promising to determine the s orbital component of 12Be with proper nuclear-matter density distribution calculations for different orbitals of 12Be ground state.Hence we bring forward to determine the s orbital component of 12Be by measuring the ctr of 12Be on C and Al at several tens of MeV/nucleon.In this paper,the feasibility and detailed experimental scheme of the ctr measurement are carefully studied.The precision of the s orbital occupation probability of 12Be ground state is expected to achieve 9%by using the proposed 2%ctr data.