M.S. Uddin

Excitation functions of the proton induced nuclear reactions on natZn up to 40 MeV

We have measured the production cross-sections of the residual radionuclides for proton-induced reactions on natural tin by using a stacked-foil activation technique in the energy range from threshold energy to 40 MeV at the MC-50 cyclotron of the Korea Institute of Radiological and Medical Sciences. The results were compared with the earlier reported experimental data and theoretical calculations based on the TALYS and the ALICE-IPPE codes. The present results are in general good agreement with the available literature data and calculated results by using the computer codes TALYS and ALICE-IPPE. The thick target integral yields were also deduced from the measured excitation functions of the produced radionuclides.

Measurements of excitation functions of α-particle induced reactions on natNi: possibility of production of the medical isotopes 61Cu and 67Cu

Abstract Excitation functions of the natNi(α,x)60,61Cu and 64Ni(α,p)67Cu reactions were measured using the stacked-foil activation technique. The experimental data achieved were compared with literature data as well as with nuclear model calculations performed using the code TALYS-1.8. Integral yields from the respective thresholds to 44 MeV were deduced from the measured excitation curves. The >99% pure 61Cu can be produced using the energy window of Eα=20→7 MeV, the yield amounting to 116 MBq/μAh. After a 2 h cooling time, the short-lived 60Cu (T1/2=23 min) impurity will be reduced to <0.1%. Due to low isotopic abundance of 64Ni, the enriched 64Ni target would be needed for the production of 67Cu via the (α,p) reaction. The cost would, however, be very high. In a few cases, particularly above 24 MeV, we have given new data points. In general, our measurements have strengthened the database.

Production Cross Sections of 186Re Radionuclide from the Proton Bombardment on Natural Tungsten

The excitation function of the natW(p,xn)186Re nuclear reaction was measured as a function of the proton energy in the range of 6 - 40 MeV by using a stacked-foil activation technique combined with high-purity germanium gamma-ray spectroscopy at the MC50 cyclotron of the Korea Institute of Radiological and Medical Sciences. The present results are in good agreement with the earlier reported experimental data and the theoretical calculation based on the TALYS code. The thick target integral yield was also deduced from the measured excitation function and stopping power of natW over the energy range from threshold up to 40 MeV.

Measurement of the Proton-induced Reaction Cross-sections of natZr(p,xn)86,87m,87(m+g),88Y up to 40 MeV

We measured the production cross-sections of 86,87m,87(m+g),88Y radioisotopes for proton-induced reactions on natural zirconium by using a stacked-foil activation technique in the energy range of 4-40 MeV at the MC50 cyclotron of the Korean Institute of Radiological and Medical Sciences. The activation method and the stacked-foil technique using the high-resolution HPGe gamma spectrometry were applied to determine the production cross-sections. The beam current was determined by the monitor reactions natCu(p,x)62Zn and 27Al(p,x)22,24Na. This work reports new data for the above reactions. The results were also compared with ALICE-IPPE model calculations compiled in MENDL-2P file. This experiment is in partial agreement with model calculations. The optimum energy range for the production of 86Y is 40 – 30 MeV The highest yield of 86Y amounts to 33.37 MBq/μAh over this energy range and the levels of the 87Y, 87mY and 88Y impurities to 2.3, 26.55 and 0.33 %, respectively at EOB. The natZr(p,x) process may be a suitable route for the production of the medically important radioisotope 86Y.

Measurement of cross-sections radioisotopes produced by the (p,xn) reactions in nat Mo

We measured cross-sections of the proton-induced reactions on natural molybdenum as a function of the proton energy in the range from threshold energy to 40 MeV by using a conventional stacked-foil activation technique at the MC50 cyclotron of the Korea Institute of Radiological and Medical Sciences (KIRAMS). The present results for most of the radioisotopes showed in general good agreement with the earlier reported data as well as the theoretical data taken from the calculations based on the ALICE-IPPE code. The integral yields for thick targets were also deduced from the measured cross- sections of the produced radioisotopes. The optimum production of the 99mTc radionuclide with minimum impurities can be obtained at the energy ranges from 10 to 23 MeV, where the production yields were obtained as 597.15 MBq/muA-h at saturation. The measured cross-sections are used for production of medically important radioisotopes such as 99mTc, 94mTc, and 93m,gTc using the medium-energy cyclotrons.