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arXiv 2403.02812nucl-thnucl-ex
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中高相对论能量下准弹性(p,2p)过程的平移不变壳模型计算

Translationally invariant shell model calculation of the quasielastic $(p,2p)$ process at intermediate relativistic energies

A. B. Larionov, Yu. N. Uzikov

AI总结:

本文利用平移不变壳模型结合组态混合计算谱振幅,成功再现了GSI在400 MeV/核子下测量的12C(p,2p)11B准弹性质子敲出反应的单微分与积分截面,验证了该核结构方法对中高能专属反应的理论描述能力。

摘要:

相对论性重离子束与各种核靶相互作用,可用于研究从核状态方程到传统核结构的广泛问题。一些此前无法回答的问题,如今可以通过逆运动学加以解决,其中包括短寿命核的结构以及对产生处于特定量子态的剩余核的专属反应道的精密研究。目前对此类过程的理论理解基于因子化模型,该模型将束缚核子或核团上的单步反应振幅与其相对于剩余核运动的某种波函数结合起来。核结构信息编码在谱振幅中,谱振幅可由核多体理论计算。本工作中,我们为此采用带组态混合的平移不变壳模型,并证明该模型能够成功再现准弹性质子敲出反应 $^{12}\mbox{C}(p,2p)^{11}\mbox{B}$ 的单微分截面和积分截面,其中出射的 $^{11}$B 处于基态和低激发态,实验数据在 GSI 于 400 MeV/核子能量下测得。

英文摘要:

Relativistic beams of heavy ions interacting with various nuclear targets allow to study a broad range of problems starting from nuclear equation of state to the traditional nuclear structure. Some questions which were impossible to answer heretofore -- can be addressed nowadays by using inverse kinematics. These includes the structure of short-lived nuclei and the precision study of exclusive channels with production of residual nuclei in certain quantum states. Theoretical understanding such processes is so far based on factorization models which combine the single-step amplitude of the reaction on a bound nucleon or nuclear cluster with a certain wave function of its relative motion with respect to the residual nucleus. The nuclear structure information is encoded in the spectroscopic amplitude, calculable within nuclear many-body theories. In this work, we use for this purpose the translationally-invariant shell model with configuration mixing and demonstrate that it successfully reproduces the single-differential and integrated cross sections of the quasielastic proton knockout, $^{12}\mbox{C}(p,2p)^{11}\mbox{B}$, with outgoing $^{11}$B in the ground state and low-lying excited states measured at GSI at 400 MeV/nucleon.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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