Exotic Behaviour of Angular Dispersion of Weakly Bound Nucleus 17 F at Small Angles
Exotic Behaviour of Angular Dispersion of Weakly Bound Nucleus 17 F at Small Angles
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DOI：
10.1088/0256-307x/23/7/021
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发表时间：
2006-07
影响因子：
3.5
通讯作者：
W. Qi;Han Jian-long;Xiao Zhi-gang;Xu Hu-shan;Sun Zhi-yu;Hu Zheng-guo;Zhang Xue-Ying;Wang Hongwei;Mao Ruishi;Yuan Xiao-Hua;Xu Zhi-Guo;Zhao Tie-cheng;Zhang Hong-Bin;Xu Hua-gen;Qi Hui-rong;Wang Yue;J. Fei;Wu Li-jie;Ding Xian-Li;Gao Qi;Gao Hui;Li Songlin;Bai Zhen;Xiao Guo-qing;Jin Gen-ming;Ren Zhong-zhou;Zhou Shan-Gui;Sergey Yu-kun
中科院分区：
文献类型：
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作者：
W. Qi;Han Jian-long;Xiao Zhi-gang;Xu Hu-shan;Sun Zhi-yu;Hu Zheng-guo;Zhang Xue-Ying;Wang Hongwei;Mao Ruishi;Yuan Xiao-Hua;Xu Zhi-Guo;Zhao Tie-cheng;Zhang Hong-Bin;Xu Hua-gen;Qi Hui-rong;Wang Yue;J. Fei;Wu Li-jie;Ding Xian-Li;Gao Qi;Gao Hui;Li Songlin;Bai Zhen;Xiao Guo-qing;Jin Gen-ming;Ren Zhong-zhou;Zhou Shan-Gui;Sergey Yu-kun
在兰州放射性离子束流线上测量了~（17）F和~（17）O在~（208）Pb上弹性散射产物的微分截面。由弹性散射微分截面的角分布得到了ln（dσ/dθ）与θ2的角色散关系图。由于17 F的特殊结构，在6° ~ 20 °的小散射角范围内，角色散曲线显示出明显的转折点，而17 O在相同的角范围内没有观察到转折点。并将实验结果与其他组的实验数据进行了比较。对已有数据的系统分析支持了上述结论：与稳定线附近的普通核相比，具有晕或皮结构的弱束缚核的角色散图具有奇异的行为。因此，对于具有晕或皮结构的弱束缚核，角色散图的转折点出现在小角度处，可以作为研究弱束缚核晕和皮现象的新探针。
The differential cross sections of 17F and 17O elastic scattering products on 208Pb have been measured at the Radioactive Ion Beam Line at Lanzhou (RIBLL). Two angular dispersion plots of ln (dσ/dθ) versus θ2 are obtained from the angular distribution of the elastic scattering differential cross sections. The angular dispersion plot exhibits a clear turning point for 17F in the range of small scattering angles 6°–20° due to its exotic structure, but for 17O, the turning point is not observed in the same angular range. The experimental results have been compared with previous data of other groups. Systematical analysis on the available data supports the above conclusion that there is an exotic behaviour of the angular dispersion plot of weakly bound nuclei with halo or skin structure as compared with that of the ordinary nuclei near stable line. Therefore the turning point of the angular dispersion plot appears at small angle for weakly bound nuclei with halo or skin structure, and can be used as a new probe to investigate the halo and skin phenomena of weakly bound nuclei.