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Autor: Ondřej Novák Konzultant: RNDr . Vladimír Wagner, CSc

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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Autor: Ondřej Novák Konzultant: RNDr . Vladimír Wagner, CSc

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  1. 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

  2. Introduction • Problem of nuclear energy – long half – life of nuclear waste • Solution= Transmutation • Changing stability of radioisotope by interaction of neutron • Shorter half - life

  3. Main goal: • To measure the quantity, spatial distribution and energy of neutrons in the transmutation system by tantalum foil

  4. Thresholdenergy • Energy, which is the lowiest for special (n,xn) reaction

  5. Spectra analysis • Fit of peaks by special (Gauss) function • Integral area

  6. 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

  7. Reaction181Ta (n,gama)182Ta

  8. Reaction181Ta (n,2n)180Ta

  9. Reaction181Ta (n,3n)179Ta • Half - life is too long or too short • 179mTa 9 ms => stable 179Hf • 179Ta 1,87 year

  10. Raction181Ta (n,4n)178Ta

  11. experiment - simulation • The total number of neutrons(indirect) • Simulation describe whole system • Experiment only few places

  12. Experiment – simulation- Au

  13. End

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