Energy dependence of dispersive effects in 12C.
Energy dependence of dispersive effects in 12C.
复制标题
12C 色散效应的能量依赖性。
作者：
Kalantar;de Jager CW;Offermann;de Vries H;Cardman;Emrich;Hersman;Miska;Rychel
我们对 {sup 12}C 弹性电子散射中色散效应的能量依赖性的研究已扩展到 690 MeV 的束流能量。在最小形状因数中观察到的横截面大于使用静电荷密度预测的横截面，该静电荷密度是通过将低能量数据与常规相移分析进行拟合而获得的。 690 MeV 处的最小值填充甚至比之前在 430 MeV 处观察到的填充还要大。这表明随着束流能量的增加，高阶过程的相对强度在最低限度内增加；色散效应的存在是这种效应最可能的解释。
Our investigation of the energy dependence of dispersive effects in elastic electron scattering from {sup 12}C has been extended to a beam energy of 690 MeV. The cross section observed in the minimum of the form factor is larger than that predicted using a static charge density obtained by fitting lower-energy data with the customary phase-shift analysis. This filling-in' of the minimum at 690 MeV is even larger than that observed previously at 430 MeV. This indicates an increase in the relative strength of higher-order processes in the minimum with an increase of beam energy; the presence of dispersive effects is the most likely explanation for this effect.