Search for alpha condensed states in 13C using alpha inelastic scattering
Search for alpha condensed states in 13C using alpha inelastic scattering
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使用 α 非弹性散射搜索 13C 中的 α 凝聚态
DOI：
10.1093/ptep/ptab102
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发表时间：
2021
影响因子：
3.5
通讯作者：
Yoshida H P
中科院分区：
文献类型：
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作者：
Inaba K;Sasamoto Y;Kawabata T;Fujiwara M;Funaki Y;Hatanaka K;Itoh K;Itoh M;Kawase K;Matsubara H;Maeda Y;Suda K;Sakaguchi S;Shimizu Y;Tamii A;Tameshige Y;Uchida M;Uesaka T;Yamada T;Yoshida H P
我们通过测量它们在前角为0的mev下的非弹性散射来寻找凝聚态inC。我们用单折叠势和多极分解分析进行了畸变波玻恩近似计算，以确定等标量跃迁强度。我们在mev附近发现了一个凹凸结构，这是由于等标量单极子跃迁。峰值拟合分析表明，这个隆起由几个状态组成。我们提出这种碰撞是由于13.5 MeV态inN的镜像态造成的，该镜像态主要衰变成凝聚态inC。我们推测mev附近的态是凝聚态的候选者，但正交性条件模型表明，凝聚态不太可能出现负宇称态。我们还发现了在16.1 MeV和16.1 MeV用等标量偶极子（）强度激发的两个态。基于实验和计算得到的能级结构之间的良好对应关系，我们认为16.1 MeV态可能是由聚类模型计算预测的凝聚态的候选者。然而，这种状态的理论转变强度明显小于实测值。进一步的实验信息是建立凝聚态inC.的迫切需要。
We searched for thecondensed state inC by measuring theinelastic scattering atMeV at forward angles including 0. We performed a distorted-wave Born approximation calculation with the single-folding potential and multipole decomposition analysis to determine the isoscalar transition strengths inC. We found a bump structure aroundMeV due to the isoscalar monopole () transition. A peak-fit analysis suggested that this bump consisted of severalstates. We propose that this bump is due to the mirror state of the 13.5 MeV state inN, which dominantly decays to thecondensed state inC. It was speculated that thestates aroundMeV were candidates for thecondensed state, but theorthogonality condition model suggests that thecondensed state is unlikely to emerge as the negative parity states. We also found twoorstates atand 16.1 MeV excited with the isoscalar dipole () strengths. We suggest that the 16.1 MeV state is a possible candidate for thecondensed state predicted by the cluster model calculations on the basis of the good correspondence between the experimental and calculated level structures. However, the theoreticaltransition strength for this state is significantly smaller than the measured value. Further experimental information is strongly desired to establish thecondensed state inC.