1. Radioanalytical practical at the Department of Neutron Activation Analysis FLNP JINR, Dubna Supervisors S.S. Pavlov and M.V. Frontasyeva Summer School 2008 Marja Raven Itumeleng Ramatlhape Ntsoaki Seaga 10.10.2008

2. Introduction Pulsed fast reactor IBR-2, Dubna

3. Experimental facility REGATA at IBR-2 reactor Nuclear reactions Ch1-Ch4 –irradiation channels, S- intermediate storage, DCV- directional control valves, L- loading unit, RCB- radiochemical glove-cell, U- unloading unit, SU- separate unit, SM- storage magazine, R- repacking unit, D- detector, AA- amplitude analyser, CB- control board, CC- CAMAC controller, R1-R3- the rooms where the system is located. Z Target radionuclide ,3n ,2n ,n,n ,np p,  d,n p,n ,n n,2n n,  d,p ,pn d,  ,p n,pn n,p n,  N

4. The Process of Neutron Activation Analysis NAA most commonly uses (n,γ) reactions Thermal neutrons (<0.55 eV) Epithermal neutrons (0.55 eV –0.1 MeV) Fast neutrons (>0.1 MeV) Gamma-spectra of material after irradiation A – pile neutron activation; B – epithermal neutron activation Neutron energy spectra in irradiation channels

5. High voltage supply Spectroscopy amplifier Analogue to digital converter Pre-ampDetectorAnalyzer HPGe Gamma detector

6. Energy Calibration with Eu-152 source

7. Efficiency Calibration curve of HPGe Canberra coaxial detector Eff(E)=P 1 e -P2E + P 3 e -P4E + P 5 e -P6E + P 7 E -P8

8. Special thanks: - Director Dmitri V. Fursaev - Dr. M.V. Frontasyeva - Mr. S.S. Pavlov THANKS FOR YOUR ATTENTION!!