Systematic study of alpha-particle spectroscopic strengths using the (p,p. cap alpha. ) reaction at 101. 5 MeV
Systematic study of alpha-particle spectroscopic strengths using the (p,p. cap alpha. ) reaction at 101. 5 MeV
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使用 101. 5 MeV 的 (p,p. cap alpha. ) 反应系统研究 α 粒子光谱强度
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
T. Carey
中科院分区：
文献类型：
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作者：
T. Carey
101.5 MeV（p，p.. cap alpha..）对于每个靶，在准自由角对的共面几何中获得了在/sup 16/O、/sup 20/Ne、/sup 24/Mg、/sup 28/Si、/sup 32/S、/sup 40/Ca、/sup 48/Ti、/sup 54/Fe和/sup 66/Zn上的反应。能量分辨率<或约为。=450 keV足以分离残留核素的低激发态。基态跃迁的数据，并为8个激发态得到的扭曲波脉冲近似计算和比较。由此产生的相对基态光谱因子的目标质量的依赖性是合理的一致的（/sup 6/Li，d）反应。相应的绝对光谱因子大于壳模型的预测，但敏感的束缚态参数化。然而，光谱形状确实限制了可能的束缚态均方根半径的范围。对激发态的拟合不太令人满意。
Proton-alpha particle coincidence spectra from 101.5 MeV (p,p..cap alpha..) reactions on /sup 16/O, /sup 20/Ne, /sup 24/Mg, /sup 28/Si, /sup 32/S, /sup 40/Ca, /sup 48/Ti, /sup 54/Fe, and /sup 66/Zn have been obtained in a coplanar geometry at quasifree angle pairs for each target. A missing energy resolution of < or approx. =450 keV was sufficient to separate the low-lying states of the residual nuclides. Data for ground-state transitions, and for eight excited states were obtained and compared with distorted-wave impulse approximation calculations. The target-mass dependence of the resultant relative ground-state spectroscopic factors is reasonably consistent with that obtained from (/sup 6/Li,d) reactions. The corresponding absolute spectroscopic factors are larger than shell-model predictions, but sensitive to the bound-state parametrization. However, the spectral shapes do constrain the range of possible bound-state rms radii. The fits to the excited states are less satisfactory.