Excitation functions of alpha-particle induced nuclear reactions on natural ytterbium

Excitation functions of the reactions ^natYb(α,xn)^{170,171,173,175,177m2}Hf, ^natYb(α,x)^{171g,172g,177g,178m}Lu and ^natYb(α,x)^169g,177gYb have been measured up to 39 MeV, among them seven (^{170,171,173,177m2}Hf, ^177g,178mLu, ^177gYb) are reported for the first time. The experimental excitation functions are compared to the theoretical calculations based on the model code ALICE-IPPE and to the only data-set found in the literature. Yields of different production routes of the therapeutically relevant ¹⁷⁷Lu are compared.     

Activation cross sections of proton induced nuclear reactions on natural hafnium

In a systematic study of light charged particle induced nuclear reactions we investigated the excitation functions of proton induced reactions on natural hafnium targets. Experimental excitation functions of proton induced reactions up to 36 MeV on high purity natural hafnium were determined using the stacked foil activation technique. High resolution off-line gamma-ray spectrometry was applied to assess the activity of each foil. From the measured activity independent and/or cumulative elemental or isotopic cross section data for production of Ta, Hf and Lu radioisotopes were determined. The experimental data were compared to the data published earlier by other authors and to results of TALYS theoretical code taken from TENDL-2010 database. Thick target yields of the investigated radionuclides were calculated from the excitation function that was deduced as an analytical fit to our experimental cross section data points.     

Activation cross sections of deuteron-induced nuclear reactions on hafnium

Experimental excitation functions for deuteron-induced reactions up to 20 MeV on high purity natural hafnium were measured with the activation method using a stacked foil irradiation technique. Metallic hafnium foils with thickness of 10 μm were stacked together with 50 μm thick aluminium and 12 μm thick titanium foils. The aluminium foils served as energy absorber while the titanium foils were used to monitor the energy and intensity of the bombarding deuteron beam. From a detailed remeasurement of the complete excitation function of the ^natTi(d,x)⁴⁸V monitor reaction it was possible to adopt the proper incident energy and beam intensity by comparing the results with the recommended values. High resolution off-line gamma-ray spectrometry was applied to assess the activity of each foil. From the measured activity independent and/or cumulative elemental or isotopic cross section data for production of Ta, Hf and Lu radioisotopes by (d,x) reactions were determined. No experimental cross section data have been published earlier for these reactions in the investigated energy region. The work focuses on the production of ^177gLu that one of the promising radionuclides for small tumor therapy due to appropriate average energy of the emitted β-particles and the main gamma-rays that are suitable for detection by gamma-camera.The presented experimental data and results predicted by the TALYS theoretical code are compared. Thick target yields for production of the investigated radionuclides were calculated from a fit to our experimental excitation curves.     

14 MeV能区中子引起的58 Ni(n,P)58m+gCo 反应截面测量

用活化法以^27Al(n，α)^24Na反应截面为中子通量标准，对14McV能区中子引起的^58Ni(n,p)^58m gCo反应截面进行了测量。中子能量是用金硅面垒半导体探测器测定的。     

Cyclotron production of the Ag, Pd, Rh radionuclides by Pd(p,x) nuclear processes

Production cross-sections of the ^105g+m,106mAg, ^100,101Pd, and ^{100g+m,101m,105g+m}Rh radionuclides through proton-induced reactions on natural palladium were measured up to 40 MeV by using a stacked-foil activation technique combined with high-resolution γ-ray spectrometry. The production cross-sections of ¹⁰¹Pd and ^{100g+m,105g+m}Rh radionuclides have been reported here for the first time from the ^natPd(p,x) nuclear processes. The present results are compared with the available literature values as well as the theoretical data calculated by the TALYS and the ALICE-IPPE computer codes. A quantitative comparison of the present results with the theoretical data has also been done with several deviation factor definitions. Optimal production pathways of the therapeutic ^105gRh radionuclide with minimal contamination using cyclotrons are discussed elaborately.     

Excitation functions of (p,x) reactions on natural nickel up to 40 MeV

Production cross-sections of the residual radionuclides for the ^natNi(p,x)^{55,56,57,58 m + g}Co, ^56,57Ni nuclear reactions were measured up to 40 MeV by using a stacked-foil activation technique at the MC-50 cyclotron of the Korea Institute of Radiological and Medical Sciences. The results were compared with the reported experimental data as well as the theoretical calculations based on the TALYS and the ALICE-IPPE codes. The present results are in general good agreement with the other experimental data and calculated results. The integral yields for thick target were also deduced from the measured excitation functions of the produced radionuclides. The present experimental results will play an important role in enrichment of the literature data base for proton-induced reactions on natural nickel leading to various applications.