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

• Published in: 核技术（英文版） 2014, Vol.25 (2), p.71-78
• Main Author: 蔡晓鹭 樊广伟 许杭华 安振东 范功涛 徐本基 李永江 潘强岩 阎酷 徐望
• Format: Article
• Language: English
• Subjects: 作用截面; 分布计算; 单粒子模型; 基态结构; 测定方法; 种用; 组件; 轨道
• ISSN: 1001-8042; 2210-3147
• DOI: 10.13538/j.1001-8042/nst.25.020501

The ambiguity of the structure of 12Be especially in the configuration of 12Be ground state has attracted a lot of attention recently. We notice that the nuclear reaction cross section err at low energy region is sensitive to the surface structure of lBe, 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 rR of 12Be on C and A1 at several tens of MeV/nucleon. In this paper, the feasibility and detailed experimental scheme of the err 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% cR data.