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Neutron Resonances Spectroscopy

1,2 Tshepo Dinoko, 3 Vasilij Andrianov , 3 Pavel Sedyshev 1 iThemba LABS, Somerset West 7129, South Africa 2 University of the Western Cape, Bellville 7535, Cape Town, South Africa 3 Frank Laboratory of Neutron Physics, JINR, Дубна. Neutron Resonances Spectroscopy. Outline.

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Neutron Resonances Spectroscopy

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  1. 1,2Tshepo Dinoko, 3Vasilij Andrianov , 3Pavel Sedyshev 1iThemba LABS, Somerset West 7129, South Africa 2University of the Western Cape, Bellville 7535, Cape Town, South Africa 3Frank Laboratory of Neutron Physics, JINR, Дубна Neutron Resonances Spectroscopy

  2. Outline • Introduction • Aim • Breit-Wigner formula • Experimental setup • Analysis • Conclusion • Acknowledgements

  3. Introduction • Neutron spectroscopy is part of neutron physics studying energy dependence of effective cross sections of different neutrons- nuclei interactions and formed nuclei excited state characteristics.

  4. Aim • To determine the ratio of Zinc and Copper in Brass samples. • Through (neutron, gamma) reaction.

  5. Frank Laboratory of Neutron Physics-facility • The experiment was carried out at the IREN (Intence REsonance Neutron source)facility. -It is 30MeV linear accelerator, with beam power of 400W.

  6. IREN Big Scintillator detector

  7. IREN parameters • Electron energy – 30MeV • Pulse current – 3A • Repetition rate – 50Hz • Neutron intensity – ~1012n/s

  8. Breit – Wigner formula

  9. Big Scintillator detector Placed 50m away from the reactor. Adv: :better resolution of neutrons : Higher neutron energies can be reached. • Length – 60cm • Diameter – 73cm • Inner diameter – 30cm • Volume of each scintillator – 35L • 12 Photomultipliers

  10. Experimental Facility-setup • Large volume liquid scintillator detector consisting of 6 sections 1- Photomultiplier 2- Investigated sample 3- Scintillator section

  11. Spectra of Brass

  12. Zn and Cu isotopes in Brass

  13. Neutron Resonance Capture Analysis

  14. Results

  15. Conclusion • The statistics affected the results. • The uncertainty was too high. • In general there is more Copper than Zinc in Brass, but for this analysed data it is the other way around.

  16. Acknowledgements • Prof. Leslie Lekala and Dr Noel Jacobs (South African supervisors) • Vasiliy Andrionov and Dr Pavel Sedyshev (JINR-FLNP supervisors)

  17. Ke a leboga Cпасибо

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