标题： 对E2对8B→p+7Be库仑离解截面的贡献[K. Langanke和T.D. Shoppa, Phys. Rev. C49(1994)R1771, ER(1994)] 显示英文标题

标题： Comment on E2 Contribution to the 8B ---> p + 7Be Coulomb Dissociation Cross Section [K. Langanke and T.D. Shoppa, Phys. Rev. C49(1994)R1771, ER(1994)]

摘要： 兰甘克和肖帕为理化学研究所的8B库仑分离实验计算的E2截面使用了一个特定模型的E2核矩阵元。其他核模型预测的E2截面要小得多（大约小3到4倍），而兰甘克和肖帕似乎假设了预测大E2截面的最乐观情景。我们还注意到，巴克已经批评了兰甘克和肖帕使用的核模型。对理化研究所数据的模型无关卡方分析表明，当前理化研究所数据的最佳拟合仅用E1振幅即可得到。从我们的卡方分析得出的E2成分的上限（90%置信度）明显小于兰甘克和肖帕所使用的值。兰甘克-肖帕的模型依赖分析不应被视为对理化研究所结果的修正，如其所声称的那样，他们引用的S17(0)并未得到证实。 显示英文摘要

摘要： The E2 cross section calculated by Langanke and Shoppa for the Riken experiment on the Coulomb Dissociation of 8B uses E2 nuclear matrix elements from one specific model. Other nuclear models predict a considerably smaller E2 cross section (by a pproximately a factor of 3 to 4), and Langanke and Shoppa appear to assume the most optimistic scenario predicting large E2 cross section. We also note that Barker has already criticised the nuclear model used by Langanke and Shoppa. A MODEL INDEPENDENT Chi-Square analysis of the Riken data, suggest the best fit for the current Riken data is obtained with E1 amplitudes only. The upper limit (90% confidence) on the E2 component derived from our Chi-Square analysis is considerably smaller than used by Langanke and Shoppa. The MODEL DEPENDENT analysis of Langanke-Shoppa should not be considered as a correction to the Riken result, as claimed, and their quoted S17(0) is not substantiated.