The cross sections of the ^(148)Sm(n,α)^(145)Nd reaction were measured for the first time at neutron energies ranging from 4.8 to 5.3 MeV.The experiment was carried out on the Van de Graaff accelerator EG-5 at the Fr...The cross sections of the ^(148)Sm(n,α)^(145)Nd reaction were measured for the first time at neutron energies ranging from 4.8 to 5.3 MeV.The experiment was carried out on the Van de Graaff accelerator EG-5 at the Frank Laboratory of Neutron Physics,Joint Institute for Nuclear Research.Fast neutrons were produced via the ^(2)H(d,n)^(3)He reaction with a deuterium gas target.A twin gridded ionization chamber was used as the charged particle detector,with back-to-back^(148)Sm samples mounted on tantalum backings at the common cathode.The absolute neutron flux was measured using the ^(238)U_(3)O_(8) sample.The obtained cross section data were compared with those from existing nuclear data libraries and theoretical calculations using the TALYS-1.96 code.The present results for the^(148)Sm(n,α)^(145)Nd reaction are expected to resolve discrepancies among various nuclear evaluation data.展开更多
Cross sections of the^(6)Li(n;t)^(4)He reaction were measured in the fast neutron energy range from 3.3 to 5.3 MeV using a gridded ionization chamber(GIC)and well-calibrated experimental setup at the EG-5 Van de Graaf...Cross sections of the^(6)Li(n;t)^(4)He reaction were measured in the fast neutron energy range from 3.3 to 5.3 MeV using a gridded ionization chamber(GIC)and well-calibrated experimental setup at the EG-5 Van de Graaff accelerator of the Frank Laboratory of Neutron Physics,Joint Institute for Nuclear Research(FLNP,JINR).Lithium fluoride(^(6)LiF)samples with varying thicknesses and krypton-CO_(2)gas mixtures with different pressures were used to optimize the detection of both alpha particles and tritons.Neutron fluxes were monitored using two high-purity(99.999%)^(238)U_(3)O_(8)samples placed inside the GIC,complemented by an externally calibrated^(3)He long counter.The measured^(6)Li(n,t)^(4)He cross-section data were compared with existing results of measurements and evaluations from EXFOR and ENDF nuclear data libraries,and the results showed a good agreement in the measured neutron energy range.These new measurements provide reliable cross-section data that contribute to the refinement of evaluated nuclear data files and support applications in nuclear physics,tritium production,and reactor design.展开更多
基金Supported by the Committee of Science of the Ministry of Science and Higher Education of the Republic of Kazakhstan(BR21881930)。
文摘The cross sections of the ^(148)Sm(n,α)^(145)Nd reaction were measured for the first time at neutron energies ranging from 4.8 to 5.3 MeV.The experiment was carried out on the Van de Graaff accelerator EG-5 at the Frank Laboratory of Neutron Physics,Joint Institute for Nuclear Research.Fast neutrons were produced via the ^(2)H(d,n)^(3)He reaction with a deuterium gas target.A twin gridded ionization chamber was used as the charged particle detector,with back-to-back^(148)Sm samples mounted on tantalum backings at the common cathode.The absolute neutron flux was measured using the ^(238)U_(3)O_(8) sample.The obtained cross section data were compared with those from existing nuclear data libraries and theoretical calculations using the TALYS-1.96 code.The present results for the^(148)Sm(n,α)^(145)Nd reaction are expected to resolve discrepancies among various nuclear evaluation data.
基金the Committee of Science of the Ministry of Science and Higher Education of the Republic of Kazakhstan(BR21881930)the National Natural Science Foundation of China(12475299)。
文摘Cross sections of the^(6)Li(n;t)^(4)He reaction were measured in the fast neutron energy range from 3.3 to 5.3 MeV using a gridded ionization chamber(GIC)and well-calibrated experimental setup at the EG-5 Van de Graaff accelerator of the Frank Laboratory of Neutron Physics,Joint Institute for Nuclear Research(FLNP,JINR).Lithium fluoride(^(6)LiF)samples with varying thicknesses and krypton-CO_(2)gas mixtures with different pressures were used to optimize the detection of both alpha particles and tritons.Neutron fluxes were monitored using two high-purity(99.999%)^(238)U_(3)O_(8)samples placed inside the GIC,complemented by an externally calibrated^(3)He long counter.The measured^(6)Li(n,t)^(4)He cross-section data were compared with existing results of measurements and evaluations from EXFOR and ENDF nuclear data libraries,and the results showed a good agreement in the measured neutron energy range.These new measurements provide reliable cross-section data that contribute to the refinement of evaluated nuclear data files and support applications in nuclear physics,tritium production,and reactor design.
