Graduate Thesis Or Dissertation

 

Determination of Reaction Product Cross Sections in the ¹³⁶Xe + ²⁰⁸Pb Multi-nucleon Transfer Reaction at E[subscript cm] = 450 MeV Public Deposited

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  • The yields of 235 projectile-like and target-like fragments from the interaction of ¹³⁶Xe with a thick target of ²⁰⁸Pb at a center-of-mass energy, E[subscript cm], of 450 MeV were measured using γ-γ-γ coincidence data from Gammasphere and off-line γ-ray spectroscopy. The results give an expansive picture of the production cross sections from this reaction. Predictions from the GRAZING code were compared to the measured yields of projectile-like and target-like fragments, while the transfer model of Zagrebaev and Greiner, which emphasizes the role of shell effects in transfer reactions, were compared to only target-like fragment. There is good agreement between the measurements and the predictions of Zagrebaev and Greiner for nuclei near or below the target (Z = 74, 76, 78, 80, 82). However, the measured cross sections exceed the predicted values by up to an order of magnitude for neutron-rich trans-target nuclei (Z = 84, 86). The GRAZING model predictions are adequate for nuclei near the projectile and target (Z = 53-55; 81-83) but grossly underestimate the yields of all other reaction products.
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