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Angular momentum transfer in incomplete fusion

机译：不完全融合中的角动量传递

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摘要

Isomeric cross-section ratios of evaporation residues formed in ~(12)C+~(93)Nb and ~(16)O-t-~(89)Y reactions were measured by recoil catcher technique followed by off-line γ-ray spectrometry in the beam energy range of 47.4-77.5 MeV for ~(12)C and 57.6-93.3 MeV for ~(16)O. The isomeric cross-section ratios were resolved into that for complete and incomplete fusion reactions. The angular momentum of the intermediate nucleus formed in incomplete fusion was deduced from the isomeric cross-section ratio by considering the statistical de-excitation of the incompletely fused composite nucleus. The data show that incomplete fusion is associated with angular momenta slightly smaller than critical angular momentum for complete fusion, indicating the deeper interpenetration of projectile and target nuclei than that in peripheral collisions.
机译：用反冲捕集器技术，然后用离线γ射线光谱法测量〜（12）C +〜（93）Nb和〜（16）Ot-〜（89）Y反应中形成的蒸发残留物的异构截面比。 〜（12）C的电子束能量范围为47.4-77.5 MeV，〜（16）O的电子束能量范围为57.6-93.3 MeV。将异构体的横截面比率解析为完全和不完全融合反应的比率。考虑到不完全融合的复合核的统计去激励，从异构体的横截面比推导了不完全融合形成的中间核的角动量。数据表明，不完全融合的角动量略小于完全融合的临界角动量，表明射弹和目标核的互穿程度比周围碰撞要深。

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