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首页> 外文期刊>Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions >ELASTIC AND INELASTIC SCATTERING IN THE LI-6, BE-9+C-12 SYSTEMS - EXCITATION OF UNBOUND EXCITED STATES AND CLUSTER TRANSFERS
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ELASTIC AND INELASTIC SCATTERING IN THE LI-6, BE-9+C-12 SYSTEMS - EXCITATION OF UNBOUND EXCITED STATES AND CLUSTER TRANSFERS

机译：LI-6，BE-9 + C-12系统中的弹性和弹性散射-激发态激发和团簇转移

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For the system Be-9 + C-12, angular distributions at E(c.m.) = 10.86 MeV and excitation functions in the c.m. energy range 3-16 MeV have been measured for the elastic scattering and inelastic scattering leading to the unbound state Be-9(5/2(-), 2.43 MeV) and to the state C-12(2(+), 4.44 MeV). For the system Li-6 + C-12, angular distributions at E(c.m.) = 13.33 MeV and excitation functions in the c.m. energy range 2-16 MeV have been measured for the elastic scattering and inelastic scattering leading to the unbound state Li-6(3(+), 2.186 MeV) and to the state C-12(2(+), 4.44 MeV). The wide angular range of the inelastic-scattering angular distributions, 20 degrees less than or similar to theta(c.m.) less than or similar to 170 degrees, is obtained by changing appropriately the roles of the projectile and target nuclei. The Be-9 + C-12 data are analyzed using first-order EFR-DWBA calculations that include He-3-cluster transfers in order to describe the enhancement in the elastic and inelastic scattering at backward scattering angles. In addition to the He-3 transfers, compound-nucleus contributions are found also to be significant at the backward scattering angles. Reorientation and coupling effects in the Be-9 + C-12 system are studied using an optical potential with a double-folded real part, resulting in a good description of the Be-9(5/2(-), 2.43 MeV) angular distribution without the need for a renormalisation of the M3Y nucleon-nucleon interaction, but with the elastic He-3 transfer still required to account for the backward-angle enhancement in the elastic-scattering angular distribution. The Li-6 + C-12 data are analyzed using coupled-channels calculations; here the inclusion of compound-nucleus contributions is found to be significant for inelastic scattering at backward scattering angles. [References: 45]
机译：对于Be-9 + C-12系统，E（c.m。）= 10.86 MeV时的角分布和c.m中的激励函数。已经测量了能量范围3-16 MeV的弹性散射和非弹性散射，导致未结合态Be-9（5/2（-），2.43 MeV）和状态C-12（2（+），4.44 MeV ）。对于系统Li-6 + C-12，E（c.m。）= 13.33 MeV处的角分布和c.m.中的激发函数。对于弹性散射和非弹性散射，已经测量了能量范围为2-16 MeV，导致未结合态Li-6（3（+），2.186 MeV）和状态C-12（2（+），4.44 MeV）。通过适当地改变弹丸和目标核的作用，可以获得小于或等于θ（c.m。）小于或等于170度的非弹性散射角分布的宽角度范围。使用包括He-3团簇转移的一阶EFR-DWBA计算分析Be-9 + C-12数据，以描述在向后散射角处弹性和非弹性散射的增强。除了He-3转移以外，还发现化合物核的作用在后向散射角也很重要。利用具有双折实部的光势研究了Be-9 + C-12系统中的重取向和耦合效应，从而很好地描述了Be-9（5/2（-），2.43 MeV）角分布，而无需重新归一化M3Y核子-核子相互作用，但仍需要弹性He-3转移来解决弹性散射角分布中的后向角增强问题。 Li-6 + C-12数据使用耦合通道计算进行分析;在这里，发现在后向散射角的非弹性散射中，包含化合物核的贡献非常重要。 [参考：45]

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