[en] The experimental data of total cross section were collected and evaluated for natural iron in the energy region from 1 keV to 20 MeV and for natural aluminium from 4.07 keV to 20 MeV. The evaluated data were recommended in the regions for them. The minimum values of Fe total cross section in the keV region were specially recommended. The resonance structures were briefly discussed for both Fe and Al. To make the evaluation better, all experimental measurements of neutron total cross section relative to Fe and Al were studied. Considering the resonance feature of medium weight nuclides, two criteria for selecting total cross section were presented: 1) the correlation between the precission of total cross section and neutron source; 2) the correlation between the accuracy of total cross section and the resolving power of the neutron spectrometer

[en] The neutron capture cross sections of ⁹³Nb, ¹⁶⁹Tm, ¹⁸¹Ta, Ag, Hf and W were measured with respect to that of ¹⁹⁷Au in the energy range from 10 to 100 keV using the time-of-flight method. Kinematically collimated neutrons were produced via the ⁷Li(p,n)⁷Be reaction. Capture events were detected with two Moxon-Rae detectors. The results were compared with the data from other author's

[en] The cross sections of the ¹⁶⁵Ho(n,γ)^166m Ho reaction have been studied in the energy range from 29 to 1100 kev, using Au as a standard. The upper limits of the reaction cross section in the energy region were estimated. The capture cross section of Ho to 1200 y isomeric state has been determined at 676 ± 114 kev neutron energy. The result is 2.9 ± 0.60 mb. (author). 2 refs, 2 tabs

[en] Maxwellian averaged capture cross sections of ^140,142Ce, ¹³⁹La and ¹⁸¹Ta are measured at kT = 24 keV using the activation technigue. The neutrons are generated via the ⁷Li(p,n)⁷Be reaction at a 2.5MV pulsed Van de Graaff accelerator. The neutron spectrum of the ⁷Li(p,n)⁷Be reaction just above the reaction threshold is measured by means of a ⁶Li-glass detector. The activities after irradiation are measured using a HPGe detector. The results are compared with data of other authors

[en] Neutron capture cross sections of Ag are measured in the energy range from 10 to 100 keV using ¹⁹⁷Au as a standard. Kinematically collimated neutrons are produced via the ⁷Li(p, n)⁷Be reaction in Sichuan University at the 2.5 MV pulsed Van de Graaff accelerator. Capture events are detected by two Moxon-Rae detectors. Time-of-flight technique is used to improve the signal-background ratio. The accuracy of the measurement is about 6% at most of the energy points. The results are in agreement with other data recently published

[en] The cross sections for ⁹⁸Mo(n,γ)⁹⁹Mo, ⁹⁴Zr(n,γ)⁹⁵Zr, ¹⁵¹Eu(n,γ)¹⁵²Eu^m, ¹⁵¹Eu(n,γ)¹⁵²Eu^g and ¹⁶⁵Ho(n,γ)¹⁶⁶Ho^m are measured relative to the ¹⁹⁷Au(n,γ)¹⁹⁸Au reaction in the ranges of 22-1100 keV for neutron energy, using the activation technique

[en] Short note

[en] Hafnium is the commonly used controlling and structural material in the reactor. The neutron capture cross sections of hafnium are necessary nuclear parameters for design and development of nuclear reactors. The (n,γ) cross sections of natural hafnium are determined in the energy range from 10 to 100 Kev. The measured neutron capture cross sections of hafnium are shown out. The results are agreeable well with previous values within the uncertainty and are also consistent with recommended values by Chinese Evaluated Nuclear Data Library

[en] The capture cross sections of wolfram are required in reactor development. It was found that systematical difference existed between the results of absolute and relative measurements in the energy range from 10 to 100 keV. In order to check the evaluation data, the neutron capture cross sections are measured by the prompt gamma-ray method in the above mentioned energy range. The method used in this experiment is different from those used by other authors. Therefore the present data can be considered as a good check for the existing data. The comparision between the present measurement data and the results given by other authors and the evaluation values are given

[en] Will the CO₂ capture be affected by the N-doping? This question remains conflict due to the effect of oxygen content in N-doped porous carbons on CO₂ uptake has not been systematically investigated. Herein, the effects of N-free and N-doped porous carbons on CO₂ uptake were investigated by experiments and theoretical calculations. To elucidate the relative influences of nitrogen functional groups, we synthesized a series of carbons without or with N-doping (2.73–9.44% N) by varying the synthesis conditions. Experimental results show that the introduction of oxygen and nitrogen into carbon framework improves CO₂ capture in porous carbons (PCs) and N-doped porous carbons (NPCs). Among these samples, the NPC600 exhibits an exceptionally high CO₂ adsorption capacity (5.01 mmol g⁻¹ at 1 bar and 25 °C). Based on the theoretical calculations, the introduction of nitrogen into carbon framework with high oxygen content further enhances electrostatic interaction for CO₂ adsorption. Moreover, the doping of nitrogen to carbon framework also has a greater effect on both the selectivity for CO₂/N₂ and the isosteric heat of CO₂ adsorption. It is predicted that this investigation will eliminate any ambiguities and better explain the influence of N-doping on CO₂ capture.