论文标题
13.35 MEV状态和高洼态的自旋 - 在$^{12} $ c核中的激发能量约为20 meV
Spin-parity of the 13.35 MeV state and high-lying states around 20 MeV in excitation energy in $^{12}$C nucleus
论文作者
论文摘要
研究$^{11} $ b（$^{3} $ He，d）$^{12} $ c在事件中的反应$^{3} $^{3} $ he Energy e $ _ {lab} $ = 25 MEV在芬兰Jyväskylä大学的K-130 Cyclotron上进行了K-130 Cycltron。已经测量了13.35 MEV状态和具有激发能量的州约20 MeV的差异截面。使用DWBA方法分析数据。暂定分配为4 $^{ - } $，以13.35 MEV给出了该州。对于20.98 MEV的状态，首次分配了旋转式3 $^{ - } $和ISOSPIN T = 0。我们对21.6 MEV的宽状态的模型描述与Isospin t = 0的先前任务以及2 $^{+} $和3 $^{ - } $的旋转率一致。 22.4 MEV的激发状态可能具有6 $^{+} $或5 $^{ - } $的旋转态度。收集的统计数据不足以解决这个问题。
Study of the $^{11}$B($^{3}$He,d)$^{12}$C reaction at incident $^{3}$He energy E$_{lab}$ = 25 MeV has been performed at the K-130 cyclotron at the University of Jyväskylä, Finland. Differential cross sections have been measured for the 13.35 MeV state and for the states with excitation energy around 20 MeV. The data were analyzed with the DWBA method. A tentative assignment, 4$^{-}$, is given for the state at 13.35 MeV. For the state at 20.98 MeV, the spin-parity 3$^{-}$ and the isospin T = 0 are assigned for the first time. Our model description of the broad state at 21.6 MeV is consistent with the previous assignments of isospin T = 0 and spin-parity of 2$^{+}$ and 3$^{-}$. The excited state at 22.4 MeV may have possible spin-parities of either 6$^{+}$ or 5$^{-}$. The collected statistics was insufficient to solve this question.
