Transfer Coefficients for (p,p’) reactions. Tutorial. Коэффициенты передачи поляризации для реакций
The tutorial consists of two chapters. The first chapter (in Russian) is devoted to theoretical studies concerned with proton spin observables in (p,p’) reactions. The second chapter (in English) deals with experimental measurements and possible combinations of polarization transfer coefficients. Different types of the DWIA calculations reported here help to identify the role of nucleon-nucleus kinematics, important for understanding the mechanisms of the reactions. In polarized proton scattering, it is important to understand how the direction and/or magnitude of proton polarization change during this process. Wolfenstein posed a similar question and then consistently formulated the necessary theory or, at least, gave a masterful review of the corresponding formalism pertaining mainly to the NN problem. According to Ohlsen, Wolfenstein developed for these purposes the general density matrix formalism in elegant and readable form. The subsequent development of the understanding of this physical process came with the advent of the model of Bleszynski et al., which introduced a particular convenient set of observables expressed in terms of linear combinations of the Wolfenstein parameters. These combinations can, in principle, directly relate to individual terms in the effective NN interaction but only, of course, when they meet the clearly formulated model conditions. The Supplement attached to the Tutorial demonstrates the specific application of the model of Bleszinski et al. to the experimental and calculated data of the process of (p,p’) (p,p’) scattering. Thus, in the Tutorial, we give a brief summary of the Wolfenstein theory, and then use the Wolfenstein parameters in the framework of the model of Bleszynski et al. to solve specific problems. Such a joint discription should more clearly represent the physical picture of the observed polarization phenomena.  ... Читать далее

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Полная версия:Коэффициенты-передачи-поляризации-для-реакций-p-p-Учебное-пособие
Беларусь Анлайн · 19 days ago 0 22
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