Investigation of the ¹⁶O(γ, ρ)³H3α reaction at the energies below the meson production threshold

• Дата: 2021
• Автор: Afanasiev, S.N.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2021
• Назва видання: Вопросы атомной науки и техники
• Теми: Experimental methods and processing of data
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/195109
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Investigation of the ¹⁶O(γ, ρ)³H3α reaction at the energies below the meson production threshold / S.N. Afanasiev // Problems of Atomic Science and Technology. — 2021. — № 3. — С. 68-71. — Бібліогр.: 11 назв. — англ.

The reaction ¹⁶O(γ, ρ)³H3α induced by bremsstrahlung photons of endpoint energy Emaxγ = 150 MeV has been studied by the method of a diffusion chamber in a magnetic field. The energy dependence of the total cross section has been measured in the energy range from the threshold and has been founded a broad resonance centered at 55 MeV. The rate of decrease in the cross section undergoes a change in the region around 55 MeV. A comparison was made with the cross section for reactions ⁴He(γ, p)³H and ¹²С(γ, р)³H2α. The agreement between the shapes of distributions for the (γ, p)³H reactions is evident and was concluded that the mechanism of interaction of the γ-quantum with the nucleus is similar. The dependence of average kinetic energy of particles on the total kinetic energy was determined. In the whole energy interval, the distribution for a proton is more than the statistical distribution. Distribution of relative energy of the proton and ³H nucleus in their c.m.s. does not agree with the predictions of the mechanism of photon absorption by an α-particle cluster, but at energies above the maximum, it agrees with calculations within the framework of the quasi-deuteron model of photoabsorption.