论文标题
Hoyle状态的辐射宽度来自$γ$ -Ray光谱
The radiative width of the Hoyle state from $γ$-ray spectroscopy
论文作者
论文摘要
级联的3.21 MEV和4.44 MEV电动四极转变已从Hoyle状态下以7.65 MeV激发能量为$^{12} $ C，受到$^{12} $ C（p，p，p $^{\ prime} $ 10.7 mev Proton Energy的反应。从质子 - $γ$ - $γ$三重合数据中，对于辐射分支比率获得了$ {γ_{\ rm rad}}/γ= 6.2（6）\ times 10^{ - 4} $的值。使用我们的结果，以及来自Eriksen等人的$ {γ_π^{e0}}/γ$。 Rev. C 102，024320和当前采用的$γ_π（E0）$值，Hoyle状态的辐射宽度被确定为$γ_{\ rm rad} = 5.1（6）\ times 10^{ - 3} $ 3} $ ev。该值比当前采用的值高约34％，并将影响恒星进化和核合成模型。
The cascading 3.21 MeV and 4.44 MeV electric quadrupole transitions have been observed from the Hoyle state at 7.65 MeV excitation energy in $^{12}$C, excited by the $^{12}$C(p,p$^{\prime}$) reaction at 10.7 MeV proton energy. From the proton-$γ$-$γ$ triple coincidence data, a value of ${Γ_{\rm rad}}/Γ=6.2(6) \times 10^{-4}$ was obtained for the radiative branching ratio. Using our results, together with ${Γ_π^{E0}}/Γ$ from Eriksen et al., Phys. Rev. C 102, 024320 and the currently adopted $Γ_π(E0)$ values, the radiative width of the Hoyle state is determined as $Γ_{\rm rad}=5.1(6) \times 10^{-3}$ eV. This value is about 34% higher than the currently adopted value and will impact on models of stellar evolution and nucleosynthesis.
