Научно-методический семинар ЛФВЭ №7-2022

Дата и время: четверг, 20 октября 2022 г., в 11:00

Место: корп. 215, ком. 241, Лаборатория физики высоких энергий им. В.И. Векслера и А.М. Балдина; онлайн в Volna

Информация о семинаре и подключении

Тема семинара: «Исследование влияния самопоглощения фотонов на эффективность детектирования детектором HPGe при измерениях образца активированного урана»

Авторы: Чан Нгок Тоан[1,2], Ж. Х. Хушвактов[1], И. А. Крячко[1], В. И. Стегайлов[1], С. И. Тютюнников[1] и А. А. Абдувалиев[1]

[1] – ОИЯИ (Дубна)
[2] – Институт физики Вьетнамской академии наук и технологий (Вьетнам)

Докладчик: Чан Нгок Тоан

Аннотация:

The photon self-absorption effect of uranium on the full-energy peak (FEP) efficiency calibration of high purity germanium (HPGe) detector was studied as a function of energy using an activated uranium sample has a thickness of 1 mm. The absolute efficiencies of the detector were obtained with the use of gamma standard sources and gamma rays of radionuclides created by irradiating the uranium sample with secondary neutrons. The measurements were carried out with the use of a Planar HPGe detector. MCNP simulation code was used to verify the experimental results. The comparison of the empirical results with the simulation results showed a good agreement. To interpret the efficiencies, the reaction yields were calculated using two methods: the use of the efficiency curve of the standard sources combined with the self-absorption correction of the uranium material and the second one is the use of the efficiency curve obtained from gamma rays in the sample.