AbstractThe different samples of iron shields with empty slits were irradiated by 14 MeV neutrons. The samples with solid structures, central symmetrical, asymmetrical, and two slits were investigated in the experiments. The results of the measurements for the samples with a shield thickness of 500 mm which were obtained in the execution of the first year of the ISTC project No. 180 are represented in this report. The spatial distributions of the threshold reaction rates:115In(n,n’),64Zn(n,p),56Fe(n,p) and19F(n,2n) were measured. This set was added by the233U(n,f) reaction. The experimental coefficients for mutual influence of two empty slits were derived. The method of γ-heating rate measurements in iron by thermoluminescent detectors (TLD) was modified. Also, the effective threshold reaction rate parameters used in the experiments were calculated.
異なる鉄試料に空のスリットを設けたものを14 MeV中性子で照射した。実験では、固体構造、中心対称、非対称、および2つのスリットを有する試料を調査した。本報告書は、ISTCプロジェクトNo.180の初年度の実施において得られた、厚さ500 mmの遮蔽体を有する試料の測定結果を示すものである。閾反応率の空間分布:115In(n,n')、64Zn(n,p)、56Fe(n,p)、19F(n,2n)を測定した。これに233U(n,f)反応を追加した。2つの空のスリットの相互影響に関する実験係数を導出した。熱蛍光線量計(TLD)による鉄中のγ線発熱率測定法を改良した。また、実験で使用した実効閾反応率パラメータを計算した。