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首页> 外文期刊>Physics of atomic nuclei >Production of the (I = 19/2) high-spin isomer ~(135)Cs in photonuclear reactions
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Production of the (I = 19/2) high-spin isomer ~(135)Cs in photonuclear reactions

机译：在光核反应中产生（I = 19/2）高自旋异构体〜（135）Cs

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摘要

The yields of ~(135)Cs nuclei in a high-spin (19/2) isomeric state and of nuclei neighboring it were measured for photonuclear reactions of the (γ, f) and (γ, α) types. The experiments in question were performed by using bremsstrahlung from a microtron at the maximum electron energy of 25 MeV. The product nuclei were identified by their half-lives and by the lines of gamma radiation emitted in their decay, and the reaction yields R were determined by the ratios of the intensities of these lines to the bremsstrahlung flux. The cross sections for isomer production were calculated, and the angular momenta of product nuclei immediately before the cascade of gamma transitions populating the ground or an isomeric nuclear state were evaluated on the basis of these results. An enhanced yield of the high-spin isomer of ~(135)Cs in the fission reaction in relation to the respective (γ, α) reaction and in relation to the results of the calculations is found.
机译：针对（γ，f）和（γ，α）类型的光核反应，测量了高自旋（19/2）异构态的〜（135）Cs核的产率和与之相邻的核的产率。所涉及的实验是通过使用来自微加速器的致辐射，以最大电子能量25 MeV进行的。产物核通过其半衰期和衰变中发射的伽玛射线谱线来识别，反应产率R由这些谱线的强度与致辐射通量之比来确定。计算这些异构体的横截面，并根据这些结果评估紧接在形成基体或异构核状态的γ跃迁级联之前的产物核的角动量。发现裂变反应中〜（135）Cs的高自旋异构体的产率相对于各自的（γ，α）反应和计算结果而言均得到提高。

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