Experimental Study on the Exotic Structure of ^12N in RIBLL  

作　　者：李加兴 刘平萍 王建松 胡正国 毛瑞士 李琛 陈若富 孙志宇 徐瑚珊 肖国青 郭忠言 

机构地区：[1]School of Physical Science and Technology, Southwest University, Chongqing 400715 [2]Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000

出　　处：《Chinese Physics Letters》2010年第3期100-103,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10205019 and 10475098.

摘　　要：We measured the total reaction cross sections of 12N in Si at 36.2 MeV/u using Radioactive Ion Beam Line in Lanzhou （RIBLL） with a new method. The reaction target was installed at the intermediate focusing point T1 at RIBLL. This scheme allows us to identify particles before and after the reaction target unambiguously. The total reaction cross section （1760±78 mb） of ^12N in Si is obtained. Assuming that ^12N consists of a core ^11C plus one halo proton, the excitation function of 12N on the Si and C targets is calculated with the Glauber model and the Fermi-Fermi density distributions. It can fit the experimental data very well. A large diffusion of the protons density distribution supports the halo structure for ^12N.We measured the total reaction cross sections of 12N in Si at 36.2 MeV/u using Radioactive Ion Beam Line in Lanzhou （RIBLL） with a new method. The reaction target was installed at the intermediate focusing point T1 at RIBLL. This scheme allows us to identify particles before and after the reaction target unambiguously. The total reaction cross section （1760±78 mb） of ^12N in Si is obtained. Assuming that ^12N consists of a core ^11C plus one halo proton, the excitation function of 12N on the Si and C targets is calculated with the Glauber model and the Fermi-Fermi density distributions. It can fit the experimental data very well. A large diffusion of the protons density distribution supports the halo structure for ^12N.

分 类 号：O571.1[理学—粒子物理与原子核物理] TN305.3[理学—物理]