Autor ond ej nov k konzultant rndr vladim r wagner csc
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Autor: Ondřej Novák Konzultant: RNDr . Vladimír Wagner, CSc PowerPoint PPT Presentation


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

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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,gama)182Ta


Reaction181Ta (n,2n)180Ta


Reaction181Ta (n,3n)179Ta

  • Half - life is too long or too short

  • 179mTa 9 ms => stable 179Hf

  • 179Ta 1,87 year


Raction181Ta (n,4n)178Ta


experiment - simulation

  • The total number of neutrons(indirect)

    • Simulation describe whole system

    • Experiment only few places


Experiment – simulation- Au


End


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