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Angular Correlations in Ternary Fission Induced by Polarized Neutrons

机译:极化中子引起的三元裂变的角度相关

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Ternary fission induced by cold polarized neutrons was studied for the two isotopes ~(233)U and ~(235)U at the Institut Laue-Langevin in Grenoble, France. In particular two types of angular correlations between the spin of the incoming neutrons and the emission directions of both, the fission fragments (FF) and the ternary particles (TP), were investigated. For FF and TP detectors facing the target at right angles to the neutron beam, first, for longitudinally polarized neutrons a triple correlation between spin and the emission of outgoing particles was explored and, second, for transversally polarized neutrons parity violating asymmetries in the emission of FFs and TPs were analyzed. Nonzero expectation values for the triple correlation were oberserved in the present experiments for the first time.
机译:在法国格勒诺布尔的Laue-Langevin研究所研究了冷极化中子引起的三元裂变,涉及到这两种同位素〜(233)U和〜(235)U。特别地,研究了入射中子的自旋与裂变碎片(FF)和三元粒子(TP)两者的发射方向之间的两种角度相关性。对于与目标相对于中子束成直角的FF和TP探测器,首先,对于纵向极化的中子,探索了自旋与出射粒子发射之间的三重相关性;其次,对于横向极化的中子,奇偶校验违反了中子束发射的不对称性。 FF和TP进行了分析。在本实验中首次观察到三次相关的非零期望值。

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