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The use of tantalum foil in the study of production and transport of neutrons in assemblies with lead target irradiated by high energy deuterons. Autor: Ondřej Novák Konzultant: RNDr . Vladimír Wagner, CSc. Introduction. Problem of nuclear energy – long half – life of nuclear w aste
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The use of tantalum foil in the study of production and transport of neutrons in assemblies with lead target irradiated by high energy deuterons Autor: Ondřej Novák Konzultant: RNDr. Vladimír Wagner, CSc
Introduction • Problem of nuclear energy – long half – life of nuclear waste • Solution= Transmutation • Changing stability of radioisotope by interaction of neutron • Shorter half - life
Main goal: • To measure the quantity, spatial distribution and energy of neutrons in the transmutation system by tantalum foil
Thresholdenergy • Energy, which is the lowiest for special (n,xn) reaction
Spectra analysis • Fit of peaks by special (Gauss) function • Integral area
Data analysis • The measured amount of gamma-rays of special line was calculated to obtain the total number of radioisotope with specific line. • The total number of nuclei of specific isotope was calculated from these values by using the formula for the weighted average
Reaction181Ta (n,3n)179Ta • Half - life is too long or too short • 179mTa 9 ms => stable 179Hf • 179Ta 1,87 year
experiment - simulation • The total number of neutrons(indirect) • Simulation describe whole system • Experiment only few places
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