Физика ядра и ионизирующего излучения в вопросах и задачах

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Correlation in formation of 8Be nuclei and alpha-particles in fragmentation of relativistic nuclei

In the events of peripheral dissociation of relativistic nuclei in the nuclear track emulsion, it is possible to study the emerging ensembles of \[\text{He}\] and \[\text{H}\] nuclei, including those from decays of unstable \[^{8}\text{Be}\] and \[^{9}\text{B}\] nuclei, as well as the Hoyle state. These extremely short-lived states are identified by invariant masses calculated from the angles in \[2\alpha\]-pairs, \[2\alpha p\]-and \[3\alpha\]-triplets in the approximation of conservation of momentum per nucleon of the primary nucleus. In the same approach, it is possible to search for more complex states. This paper explores the correlation between the formation of \[^{8}\text{Be}\] nuclei and the multiplicity of accompanying \[\alpha\]-particles in the dissociation of relativistic \[^{16}\text{O}\], \[^{22}\text{Ne}\], \[^{28}\text{Si}\], and \[^{197}\text{Au}\] nuclei. On the above basis, estimates of this correlation are presented for the unstable \[^{9}\text{B}\] nucleus and the Hoyle state. The enhancement in the \[^{8}\text{Be}\] contribution to dissociation with the \[\alpha\]-particle multiplicity has been found. Decays of \[^{9}\text{B}\] nuclei and Hoyle states follow the same trend.

Ядерная физика

Методические указания к курсу «Ядерная физика» для студентов дневного и вечернего отделения физического отделения РГУ

Задача 2

Задача 1

Некоторые фундаментальные физические постоянные и единицы измерения (PDG-2022). Часть 3

Длина:           

Некоторые фундаментальные физические постоянные и единицы измерения (PDG-2022). Часть 2