Study Of Activation Cross Sections Research Articles

Study of activation cross sections of double neutron capture reaction on 193Ir for the reactor production route of radiotherapeutic 195mPt

The radiotherapeutic 195mPt is among the most effective Auger electron emitters of the currently studied radionuclides that have a potential theranostic application in nuclear medicine. Production of 195mPt through double neuron capture of enriched 193Ir followed by β−-decay to the radioisotope of interest carried out at the research reactor IBR-2 is described. Because of the high radiation background, radiochemical purification procedure of 195mPt from bulk of iridium was needed to be developed and is detailed here as well. For the first time, cross section and resonance integral for the reaction 194Ir(n,γ)195mIr were determined. Resonance neutrons contribution was established to exceed that of thermal neutrons, and resonance integral for the reaction 194Ir(n,γ)195mIr is calculated to be 2900 b. Specific activity of 195mPt was estimated to reach a value of 38.7 GBq/(g Pt) at IBR-2 by the end of bombardment (EOB).

Study of activation cross sections of proton induced reactions on natBa and natCe near their threshold energy regions

Abstract Activation cross-sections of the nuclear reactions natBa(p,x)135,132gLa, 135mBa and natCe(p,x)142,139,138mPr, 141,139,137mCe have been measured experimentally at the MGC-20 cyclotron, Cairo, Egypt, from their respective threshold energies up to about 14.7 MeV. Stacked foil irradiation technique and high-resolution gamma-ray spectroscopy were used. A comparison between the experimental and theoretical data derived from the nuclear model codes EMPIRE and TALYS (in the form of the TENDL library) was performed. The agreement in the low-energy region is fairly good. Integral yields of the produced radioisotopes were estimated from the present cross-section data and the results are discussed in terms of their production possibilities.

Extension of experimental activation cross-sections database of deuteron induced nuclear reactions on manganese up to 50\xa0MeV

In the frame of a systematic study of activation cross sections of deuteron induced reactions, experimental cross section data were measured on Mn (monoisotopic 55Mn) up to 50 MeV for the formation of 56,54,52Mn, 48V and 51Cr by using stacked-foil activation method and high resolution gamma spectrometry. The experimental data are compared with the earlier published data and with the results predicted by the ALICE-IPPE-D and EMPIRE-II-D theoretical codes, and with the data taken from the on-line TENDL-2017 library.

Activation cross sections of deuteron induced reactions on natHf in the 12–50 MeV energy range

As a part of our systematical study of activation cross sections of deuteron induced nuclear reactions, cross sections on hafnium were investigated up to 50 MeV. Excitation functions were measured for the natHf(d,xn)178g,177,176,175,173Ta, natHf(d,x)181,180m,179m2,175,173,172Hf, natHf(d,x)173,172,171,170Lu and natHf(d,x)169Yb reactions by using the activation method, stacked foil irradiation technique and off-line gamma-ray spectrometry for quantification of the produced radionuclides. The experimental results are compared with the earlier results in the overlapping energy range, and with the theoretical predictions of the ALICE IPPE-D and EMPIRE II-D theoretical codes and with values reported in the TENDL-2017 on-line library obtained with the TALYS code.

Study of activation cross sections of deuteron induced reactions on erbium in the 32–50 MeV energy range

Activation cross sections of the natEr(d,x)163,165,166,167,168,170Tm and natEr(d,x)171,161Er nuclear reactions have been measured in the 32–50MeV energy range, above 40MeV for the first time. The activation method with stacked foil irradiation technique and gamma-ray spectroscopy were used. The experimental cross sections were compared with the theoretical predictions in the TENDL-2015 library.

Study of activation cross sections of deuteron induced reactions on barium. Production of 131Cs, 133Ba

Abstract In the frame of a systematic study of deuteron induced activation processes on middle mass elements, excitation functions of the nat Ba(d,x) 135,133,132 La, 135m,133m,133mg,131mg Ba, 136mg,134mg,132,129 Cs reactions were measured up to 50 MeV for the first time. Cross sections were measured with the activation method using a stacked foil irradiation technique followed by HPGe γ -ray spectrometry. A comparison with the results of the nuclear model TALYS code (reported in the TENDL-2015 library) was done. The potential use of the deuteron induced reactions on Ba for applications ( 131 Cs and 131 Ba production) is discussed.

Activation cross-sections of deuteron induced nuclear reactions on neodymium up to 50 MeV

In the frame of a systematic study of activation cross sections of deuteron induced nuclear reactions on rare earths, the reactions on neodymium for production of therapeutic radionuclides were measured for the first time. The excitation functions of the natNd(d,x) 151,150,149,148m,148g,146,144,143Pm, 149,147,139mNd, 142Pr and 139gCe nuclear reactions were assessed by using the stacked foil activation technique and high resolution γ-spectrometry. The experimental excitation functions were compared to the theoretical predictions calculated with the modified model codes ALICE-IPPE-D and EMPIRE-II-D and with the data in the TENDL-2012 library based on latest version of the TALYS code. The application of the data in the field of medical isotope production and nuclear reaction theory is discussed.

Study of activation cross sections of proton induced reactions on barium: Production of 131Ba→131Cs

In the frame of a systematic study of charged particle production routes of the therapeutic radioisotope (131)Cs, excitation functions of the (nat)Ba(p,x)(135,132mg)La, (ind135m,cum133m,cum133mg,cum131mg)Ba and (136mg,134mg,132,cum129)Cs reactions were measured in the 30-70 MeV energy range using stacked foil irradiation technique, activation method and gamma spectroscopy. Comparisons with new results of the ALICE-IPPE and EMPIRE-II codes and with existing data obtained with TALYS code are shown. From the measured cross section data integral yields were calculated and compared with experimental integral yield data reported in the literature. Potential use of proton induced reactions on Ba for production of (131)Cs is discussed.

Study of activation cross sections of proton induced reactions on erbium for practical applications

Excitation functions of the natEr(p,x) 163,166,167,168,170Tm and natEr(p,x) cum161Er reactions were measured experimentally from the respective threshold up to 36 MeV incident proton energy and in the range of 60–70 MeV. The cross sections were measured with activation method using the stacked foil irradiation technique. A theoretical interpretation of contributing reactions based on results of the ALICE-IPPE code was done. From our experimental cross section data integral production yields were calculated which were compared to the experimental integral yield data reported in the literature.

Study of activation cross sections of deuteron‐induced reactions on erbium for applications

Keywords: natEr target; deuteron-induced reaction; cross section; 165,169Er and 167,170,171Tm therapeutic radionuclides