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

The ambiguity of the structure of ~(12)Be 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 ~(12)Be,which is greatly impacted by the ground state configuration of ~(12)Be especially by the occupancy probability of the s orbital component.By using existed interaction cross section data of ~(12)Be on C at 790 MeV/nucleon and Glauber model,the upper limit of the s orbital occupation probability of ~(12)Be 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 ~(12)Be with proper nuclear-matter density distribution calculations for different orbitals of ~(12)Be ground state.Hence we bring forward to determine the s orbital component of ~(12)Be by measuring the ctr of ~(12)Be 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 ~(12)Be ground state is expected to achieve 9%by using the proposed 2%ctr data.     

压药压力对硅系延期药燃烧性能的影响

在80～200MPa压药压力范围内,通过测量铅丹-硅质量比为2:1的硅系延期药的燃烧速度和温度,研究压药压力对燃速和温度的影响。结果表明:硅系延期药平均燃速随着压药压力的增大而增大,且呈良好的线性关系;随着压药压力的增大,延期精度呈现先升后降的趋势,压药压力约为170MPa时延期精度达到最佳;在测量误差范围内,燃烧温度随压药压力的变化具有一定的波动性。     

基于LabVIEW的X射线探测系统及其在激光康普顿散射实验中的应用

主要介绍一套基于LabVIEW的X射线探测系统,用于上海应用物理研究所嘉定园区100MeV直线加速器上的激光康普顿散射实验测量.它主要由自行研制的Si(Li)探测器,读出电子学和基于IabVIEW的数据获取(DAQ)三部分组成,具有信号谱显示,获取控制和简单的在线数据分析等功能.性能测试显示、系统的能量分辨率为184 ...