The Experts below are selected from a list of 17004 Experts worldwide ranked by ideXlab platform
F. Tárkányi - One of the best experts on this subject based on the ideXlab platform.
-
Experimental investigation and theoretical calculation for 3He induced nuclear reactions on vanadium
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2016Co-Authors: B.m. Ali, S. Takács, F. Ditrói, M. Al-abyad, U. Seddik, S.u. El-kameesy, F. TárkányiAbstract:Abstract Using stacked-foil activation technique and gamma-ray spectrometry, excitation functions for 3He induced nuclear reactions on natV were measured. Cross-sections for natV(3He, xn)52m,gMn and natV(3He, pxn)51Cr nuclear reactions were measured up to 27 MeV utilizing the MGC-20E cyclotron of ATOMKI. The measurements establish for the first time consistent excitation curves. Comparisons with results for values derived from different theoretical codes were included. Integral Yield were calculated.
-
Study of activation cross sections of proton induced reactions on barium: Production of 131Ba 131Cs
Applied radiation and isotopes : including data instrumentation and methods for use in agriculture industry and medicine, 2010Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Hiromichi Yamazaki, A. Mohammadi, A.v. IgnatyukAbstract: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.
-
Investigation of production of the therapeutic radioisotope 165Er by proton induced reactions on erbium in comparison with other production routes
Applied radiation and isotopes : including data instrumentation and methods for use in agriculture industry and medicine, 2008Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Tsutomu Ohtsuki, S.f. Kovalev, A.v. IgnatyukAbstract:Abstract The excitation function of the natEr(p,xn)165Tm reaction resulting in production of 165Er was measured up to 70 MeV by activation of stacked foils practically for the first time. The theoretical interpretation is based on the results of the ALICE-IPPE and EMPIRE-II codes. From the measured experimental cross section data Integral production Yield was calculated and compared with experimental Integral Yield data reported in the literature. Different production routes of the therapeutic radioisotope 165Er were compared.
-
Investigation of excitation functions of deuteron induced nuclear reactions on lead
Journal of Radioanalytical and Nuclear Chemistry, 2008Co-Authors: F. Ditrói, F. Tárkányi, S. Takács, Mamoru Baba, A.v. Ignatyuk, Shuza Uddin, Masayuki Hagiwara, S.f. KovalevAbstract:Activation data of lead are of great importance due to the widespread applications of this element in various technological fields and to the well known adverse effects to biological systems. Use of high sensitivity radioanalytical techniques allows study of uptake, distribution and speciation. Cross sections of deuteron induced nuclear reactions on lead were measured up to 40 MeV using the standard stacked foil irradiation technique and high resolution gamma-ray spectrometry. Experimental cross sections and derived Integral Yields are reported for the natPb(d,xn)203,204,205,206,207Bi, natPb(d,x)203Pb202Tl reactions. Only one set of experimental cross section data was found in the literature. The experimental data are analyzed and compared with the results of the theoretical model code ALICE-IPPE and with the experimental Integral Yield reported in the literature.
-
Study of activation cross-sections of deuteron induced reactions on erbium: Production of radioisotopes for practical applications
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Tsutomu Ohtsuki, S.f. Kovalev, A.v. IgnatyukAbstract:Abstract Excitation functions of the nat Er(d, x) 163,165,166,167,168,170 Tm and nat Er(d, x) 171 Er reactions have been measured experimentally from their respective thresholds up to 40 MeV for the first time. Cross-sections were determined using the activation method and the stacked foil irradiation technique. The theoretical interpretation was done with the ALICE-IPPE code. From the fitted experimental cross-section data Integral production Yields were calculated and compared to measured Integral Yield data reported in the literature.
Chin Lee - One of the best experts on this subject based on the ideXlab platform.
-
intermediate product Yield enhancement with a catalytic inorganic membrane ii nonisothermal and Integral operation in a back mixed reactor
Chemical Engineering Science, 1997Co-Authors: Michael P. Harold, Chin LeeAbstract:Abstract The catalytic membrane reactor (CMR) offers added flexibility over its conventional reactor counterparts. In this study a model is developed to examine the performance of a completely back-mixed CMR for the consecutive-parallel reaction system given by 1 A+B→R 2 A+R→P+Q where the desired product is the intermediate R. The effect of segregating reactants to opposite sides of the nonpermselective membrane is examined with regard to the conversion of the main reactants A and B and the Integral Yield of R. The conversions and Yield are shown to be sensitive functions of the degree of segregation. Several factors are identified which contribute to: • • the intrinsic kinetics and catalytic acitivity (i.e. apparent reaction orders), • • the degree of mixing of the reactants A and B between the two chambers (i.e. the characteristic flow, transmembrane diffusion, and reaction time), • • the proximity of the active layer to both of the reactants, and • • the relative extents and stoichiometries of the two reactions. For a fixed conversion of B and fixed overall B A feed ratio, and for the case in which the rate of reaction 2 has a higher apparent reaction order with respect to A than reaction 1, the Integral Yield of R exceeds that for a mixed feed if A is concentrated on the support side and B is concentrated on the active layer side. The membrane in this case serves as a diffusional barrier to reactant A, thereby controlling the effective B A ratio at the catalytic layer. The Yield increase is achieved at the expense of contact time (or reactor volume). The analysis shows that it is possible to realize the same Yield increase with a mixed feed by adjusting the B A feed ratio.
-
Intermediate product Yield enhancement with a catalytic inorganic membrane—II. Nonisothermal and Integral operation in a back-mixed reactor
Chemical Engineering Science, 1997Co-Authors: Michael P. Harold, Chin LeeAbstract:Abstract The catalytic membrane reactor (CMR) offers added flexibility over its conventional reactor counterparts. In this study a model is developed to examine the performance of a completely back-mixed CMR for the consecutive-parallel reaction system given by 1 A+B→R 2 A+R→P+Q where the desired product is the intermediate R. The effect of segregating reactants to opposite sides of the nonpermselective membrane is examined with regard to the conversion of the main reactants A and B and the Integral Yield of R. The conversions and Yield are shown to be sensitive functions of the degree of segregation. Several factors are identified which contribute to: • • the intrinsic kinetics and catalytic acitivity (i.e. apparent reaction orders), • • the degree of mixing of the reactants A and B between the two chambers (i.e. the characteristic flow, transmembrane diffusion, and reaction time), • • the proximity of the active layer to both of the reactants, and • • the relative extents and stoichiometries of the two reactions. For a fixed conversion of B and fixed overall B A feed ratio, and for the case in which the rate of reaction 2 has a higher apparent reaction order with respect to A than reaction 1, the Integral Yield of R exceeds that for a mixed feed if A is concentrated on the support side and B is concentrated on the active layer side. The membrane in this case serves as a diffusional barrier to reactant A, thereby controlling the effective B A ratio at the catalytic layer. The Yield increase is achieved at the expense of contact time (or reactor volume). The analysis shows that it is possible to realize the same Yield increase with a mixed feed by adjusting the B A feed ratio.
Guinyun Kim - One of the best experts on this subject based on the ideXlab platform.
-
Production Cross Sections of 186Re Radionuclide from the Proton Bombardment on Natural Tungsten
Journal of Nuclear Science and Technology, 2008Co-Authors: Mayeen Uddin Khandaker, M.s. Uddin, Kwangsoo Kim, Manwoo Lee, Kyung Sook Kim, Young-seok Lee, Young-sik Cho, Young-ouk Lee, Guinyun KimAbstract: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.
S. Takács - One of the best experts on this subject based on the ideXlab platform.
-
Experimental investigation and theoretical calculation for 3He induced nuclear reactions on vanadium
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2016Co-Authors: B.m. Ali, S. Takács, F. Ditrói, M. Al-abyad, U. Seddik, S.u. El-kameesy, F. TárkányiAbstract:Abstract Using stacked-foil activation technique and gamma-ray spectrometry, excitation functions for 3He induced nuclear reactions on natV were measured. Cross-sections for natV(3He, xn)52m,gMn and natV(3He, pxn)51Cr nuclear reactions were measured up to 27 MeV utilizing the MGC-20E cyclotron of ATOMKI. The measurements establish for the first time consistent excitation curves. Comparisons with results for values derived from different theoretical codes were included. Integral Yield were calculated.
-
Study of activation cross sections of proton induced reactions on barium: Production of 131Ba 131Cs
Applied radiation and isotopes : including data instrumentation and methods for use in agriculture industry and medicine, 2010Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Hiromichi Yamazaki, A. Mohammadi, A.v. IgnatyukAbstract: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.
-
Investigation of production of the therapeutic radioisotope 165Er by proton induced reactions on erbium in comparison with other production routes
Applied radiation and isotopes : including data instrumentation and methods for use in agriculture industry and medicine, 2008Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Tsutomu Ohtsuki, S.f. Kovalev, A.v. IgnatyukAbstract:Abstract The excitation function of the natEr(p,xn)165Tm reaction resulting in production of 165Er was measured up to 70 MeV by activation of stacked foils practically for the first time. The theoretical interpretation is based on the results of the ALICE-IPPE and EMPIRE-II codes. From the measured experimental cross section data Integral production Yield was calculated and compared with experimental Integral Yield data reported in the literature. Different production routes of the therapeutic radioisotope 165Er were compared.
-
Investigation of excitation functions of deuteron induced nuclear reactions on lead
Journal of Radioanalytical and Nuclear Chemistry, 2008Co-Authors: F. Ditrói, F. Tárkányi, S. Takács, Mamoru Baba, A.v. Ignatyuk, Shuza Uddin, Masayuki Hagiwara, S.f. KovalevAbstract:Activation data of lead are of great importance due to the widespread applications of this element in various technological fields and to the well known adverse effects to biological systems. Use of high sensitivity radioanalytical techniques allows study of uptake, distribution and speciation. Cross sections of deuteron induced nuclear reactions on lead were measured up to 40 MeV using the standard stacked foil irradiation technique and high resolution gamma-ray spectrometry. Experimental cross sections and derived Integral Yields are reported for the natPb(d,xn)203,204,205,206,207Bi, natPb(d,x)203Pb202Tl reactions. Only one set of experimental cross section data was found in the literature. The experimental data are analyzed and compared with the results of the theoretical model code ALICE-IPPE and with the experimental Integral Yield reported in the literature.
-
Study of activation cross-sections of deuteron induced reactions on erbium: Production of radioisotopes for practical applications
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Tsutomu Ohtsuki, S.f. Kovalev, A.v. IgnatyukAbstract:Abstract Excitation functions of the nat Er(d, x) 163,165,166,167,168,170 Tm and nat Er(d, x) 171 Er reactions have been measured experimentally from their respective thresholds up to 40 MeV for the first time. Cross-sections were determined using the activation method and the stacked foil irradiation technique. The theoretical interpretation was done with the ALICE-IPPE code. From the fitted experimental cross-section data Integral production Yields were calculated and compared to measured Integral Yield data reported in the literature.
F. Ditrói - One of the best experts on this subject based on the ideXlab platform.
-
Experimental investigation and theoretical calculation for 3He induced nuclear reactions on vanadium
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2016Co-Authors: B.m. Ali, S. Takács, F. Ditrói, M. Al-abyad, U. Seddik, S.u. El-kameesy, F. TárkányiAbstract:Abstract Using stacked-foil activation technique and gamma-ray spectrometry, excitation functions for 3He induced nuclear reactions on natV were measured. Cross-sections for natV(3He, xn)52m,gMn and natV(3He, pxn)51Cr nuclear reactions were measured up to 27 MeV utilizing the MGC-20E cyclotron of ATOMKI. The measurements establish for the first time consistent excitation curves. Comparisons with results for values derived from different theoretical codes were included. Integral Yield were calculated.
-
Study of activation cross sections of proton induced reactions on barium: Production of 131Ba 131Cs
Applied radiation and isotopes : including data instrumentation and methods for use in agriculture industry and medicine, 2010Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Hiromichi Yamazaki, A. Mohammadi, A.v. IgnatyukAbstract: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.
-
Investigation of production of the therapeutic radioisotope 165Er by proton induced reactions on erbium in comparison with other production routes
Applied radiation and isotopes : including data instrumentation and methods for use in agriculture industry and medicine, 2008Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Tsutomu Ohtsuki, S.f. Kovalev, A.v. IgnatyukAbstract:Abstract The excitation function of the natEr(p,xn)165Tm reaction resulting in production of 165Er was measured up to 70 MeV by activation of stacked foils practically for the first time. The theoretical interpretation is based on the results of the ALICE-IPPE and EMPIRE-II codes. From the measured experimental cross section data Integral production Yield was calculated and compared with experimental Integral Yield data reported in the literature. Different production routes of the therapeutic radioisotope 165Er were compared.
-
Investigation of excitation functions of deuteron induced nuclear reactions on lead
Journal of Radioanalytical and Nuclear Chemistry, 2008Co-Authors: F. Ditrói, F. Tárkányi, S. Takács, Mamoru Baba, A.v. Ignatyuk, Shuza Uddin, Masayuki Hagiwara, S.f. KovalevAbstract:Activation data of lead are of great importance due to the widespread applications of this element in various technological fields and to the well known adverse effects to biological systems. Use of high sensitivity radioanalytical techniques allows study of uptake, distribution and speciation. Cross sections of deuteron induced nuclear reactions on lead were measured up to 40 MeV using the standard stacked foil irradiation technique and high resolution gamma-ray spectrometry. Experimental cross sections and derived Integral Yields are reported for the natPb(d,xn)203,204,205,206,207Bi, natPb(d,x)203Pb202Tl reactions. Only one set of experimental cross section data was found in the literature. The experimental data are analyzed and compared with the results of the theoretical model code ALICE-IPPE and with the experimental Integral Yield reported in the literature.
-
Study of activation cross-sections of deuteron induced reactions on erbium: Production of radioisotopes for practical applications
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007Co-Authors: F. Tárkányi, S. Takács, F. Ditrói, Alex Hermanne, B. Király, Mamoru Baba, Tsutomu Ohtsuki, S.f. Kovalev, A.v. IgnatyukAbstract:Abstract Excitation functions of the nat Er(d, x) 163,165,166,167,168,170 Tm and nat Er(d, x) 171 Er reactions have been measured experimentally from their respective thresholds up to 40 MeV for the first time. Cross-sections were determined using the activation method and the stacked foil irradiation technique. The theoretical interpretation was done with the ALICE-IPPE code. From the fitted experimental cross-section data Integral production Yields were calculated and compared to measured Integral Yield data reported in the literature.