Autor ond ej nov k konzultant rndr vladim r 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 w aste

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Autor ond ej nov k konzultant rndr vladim r 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
Introduction transport of neutrons in assemblies with lead target irradiated by high energy deuterons

  • 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
Main goal: transport of neutrons in assemblies with lead target irradiated by high energy deuterons

  • To measure the quantity, spatial distribution and energy of neutrons in the transmutation system by tantalum foil


Threshold energy
Threshold transport of neutrons in assemblies with lead target irradiated by high energy deuteronsenergy

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


Spectra analysis
Spectra analysis transport of neutrons in assemblies with lead target irradiated by high energy deuterons

  • Fit of peaks by special (Gauss) function

    • Integral area


Data analysis
Data analysis transport of neutrons in assemblies with lead target irradiated by high energy deuterons

  • 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


Reaction 181 ta n gama 182 ta
Reaction transport of neutrons in assemblies with lead target irradiated by high energy deuterons181Ta (n,gama)182Ta


Reaction 181 ta n 2n 180 ta
Reaction transport of neutrons in assemblies with lead target irradiated by high energy deuterons181Ta (n,2n)180Ta


Reaction 181 ta n 3n 179 ta
Reaction transport of neutrons in assemblies with lead target irradiated by high energy deuterons181Ta (n,3n)179Ta

  • Half - life is too long or too short

  • 179mTa 9 ms => stable 179Hf

  • 179Ta 1,87 year


Raction 181 ta n 4n 178 ta
Raction transport of neutrons in assemblies with lead target irradiated by high energy deuterons181Ta (n,4n)178Ta


Experiment simulation
experiment - simulation transport of neutrons in assemblies with lead target irradiated by high energy deuterons

  • The total number of neutrons(indirect)

    • Simulation describe whole system

    • Experiment only few places


Experiment simulation au
Experiment – transport of neutrons in assemblies with lead target irradiated by high energy deuteronssimulation- Au


End transport of neutrons in assemblies with lead target irradiated by high energy deuterons


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