A method of estimating and subtracting the hydrogen background in the natural carbon target used in the ^(12)C + ^(12)C experiment  

作　　者：屈卫卫 张高龙 Satoru Terashima Isao Tanihata 郭晨雷 乐小云 

机构地区：[1]School of Physics and Nuclear Energy Engineering, Beihang University [2]International Research Center for Nuclei and Particles in the Cosmos, Beihang University [3]Research Center for Nuclear Physics, Osaka University

出　　处：《Nuclear Science and Techniques》2014年第5期63-67,共5页核技术（英文）

基　　金：Supported by the Innovation Foundation of BUAA for PhD Graduates and National Natural Science Foundation of China(Nos.11035007,11235002 and 11175011)

摘　　要：The experimental data of 100 A MeV12C +12C elastic scattering are checked by using two-body kinematic calculation and12 C + p elastic scattering. It is shown that the measured data are true and reliable. In the paper,the transformation between the excited energy spectra of the12 C +12C system and the ground state energy spectra of the12 C + p system is introduced. The method of subtraction of the hydrogen background in the natural carbon target used in the experiment is elaborately described and the results are discussed. It is indicated that this method of subtraction of hydrogen background is reasonable and can be used in the data analysis. Based on the elastic scattering cross section of the previous experiment of12C+p at 95.3A MeV, the hydrogen content entered into the reaction is analyzed. The final hydrogen content in the natural carbon target is(2.73 ± 0.12)%.The experimental data of 100A MeV 12C ＋ 12C elastic scattering are checked by using two-body kinematic calculation and 12C ＋ p elastic scattering. It is shown that the measured data are true and reliable. In the paper, the transformation between the excited energy spectra of the 12C ＋ 12C system and the ground state energy spectra of the 12C ＋ p system is introduced. The method of subtraction of the hydrogen background in the natural carbon target used in the experiment is elaborately described and the results are discussed, It is indicated that this method of subtraction of hydrogen background is reasonable and can be used in the data analysis. Based on the elastic scattering cross section of the previous experiment of 12C ＋ p at 95.3A MeV, the hydrogen content entered into the reaction is analyzed. The final hydrogen content in the natural carbon target is （2.73±0.12）%.

关 键 词：实验数据 氢含量 碳靶 天然 弹性散射截面 估算 运动学计算 背景减除 

分 类 号：O572.2[理学—粒子物理与原子核物理]