论文标题
在$^{20} $ ne中搜索可能的α-统计状态
Search for possible alpha-condensate states in $^{20}$Ne
论文作者
论文摘要
$^{20} $ ne的根平方半径是从$α$+$+$^{20} $ ne衍射散射的分析中首次实验推导的。通过改良衍射模型分析了弹性和非弹性$α$+$+$^{20} $ ne的散射范围，从几个MEV/核至100 MeV/核子分析。观察到与基态相比，K $^π$ = 0 $ = 0 $ _ {1}^{+} $ = 0 $ _ {1}^{+} $ = 0 $ _ {1}^{+}的成员没有明显的半径增强。同时，对于K $^π$ = 0 $ _ {1}^{ - } $ band成员获得了20％的半径增强。此外，对于0 $ _ {2}^{+} $状态，位于$α$ - 发射阈值上方的状态增加了半径。该结果可以说明0 $ _ {2}^{+} $状态的可能的$α$ - 符号结构，并且可以被视为$^{12} $ c的著名7.65-mev 0 $ _ {2}^{+} $ hoyle状态的可能类似物。
The root mean square radii of $^{20}$Ne in the short-lived excited states were experimentally deduced for the first time from the analyses of $α$+$^{20}$Ne diffraction scattering. Differential cross sections of the elastic and inelastic $α$+$^{20}$Ne scattering in the incident energy range from a few MeV/nucleon up to 100 MeV/nucleon were analyzed by the modified diffraction model. No significant radius enhancement for the members of K$^π$ = 0$_{1}^{+}$ and K$^π$ = 2$^{-}$ bands in comparison with the ground state was observed. At the same time 20 % radius enhancement was obtained for the K$^π$ = 0$_{1}^{-}$ band members. Moreover, for the 0$_{2}^{+}$ state located above $α$-emission threshold increased radius was observed. This result can speak in favor of possible $α$-condensate structure of the 0$_{2}^{+}$ state and can be considered as a possible analog of the famous 7.65-MeV 0$_{2}^{+}$ Hoyle state of $^{12}$C.
