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Based on the urgent requirement of the (n,γ) reaction cross-section in the energy range of keV~MeV, 4π gamma total absorption facility (GTAF) is being constructed at China Institute of Atomic Energy ...
In this paper a two dimensional readout micromegas detector with a polyethylene foil as converter was simulated on GEANT4 toolkit and GARFIELD for fast neutron detection. A new track reconstruction me...
The Molten Salt Reactor (MSR), one of the `Generation IV' concepts, is a liquid-fuel reactor, which is different from the conventional reactors using solid fissile materials due to the flow effect of...
Neutron penumbral imaging technique is an important diagnosis method in Inertial Confined Fusion, and the design of the aperture shape will affect the resolution of the imaging system. In this paper, ...
We simulate the response of a modified Anderson-Braun rem counter in the energy range from thermal energy to about 10 GeV using the FLUKA code. Also, we simulate the lethargy spectrum of CSNS outside ...
Recent progress in research on octupole deformation around Z=56, N=88 neutron-rich nuclei by our cooperative groups of Tsinghua University, Vanderbilt University and Lawrence Berkeley National Labora...
The paper selects 15 samples of the pottery warriors in Qinshihuang Mausoleum Pit K0006, 21 samples of pottery warriors in Qinshihuang Mausoleum Pit K0007 and 75 samples of clay nearby Qinshihuang mau...
In this paper Micromegas has been designed to detect neutrons. The simulation of the spatial resolution of Micromegas as neutron detector is carried out by GEANT4 toolkit. The neutron track reconstruc...
The neutron 3PF2 pairing gap in pure neutron matter, neutron 3PF2 gap and neutron-proton 3SD1 gap in symmetric nuclear matter have been studied by using the Brueckner-Hartree-Fock(BHF) approach and th...
主要关于上海同步辐射装置(SSRF)储存环电子引发产生的韧致辐射和中子辐射的研究. 中子和光子经多种组合材 料(厚度在5cm~115cm之间)屏蔽后的剂量特征由蒙特卡罗代码MCNP和EGSnrc估算得到; 蒙特卡罗计算表明, 单一的材料如铅, 铁和聚乙烯对高能中子是无效的生物屏蔽材料, 而组合材料如铅或者铁加聚乙烯和铅或者铁加混凝土被认为是屏蔽高能中子很好的组合材料. 铅铁等高Z材料加点包含有氢的...
The neutron-halo nuclei, 11Li, 14Be, and 17B, are studied in the three-body model. The Yukawa interaction is used to describe the interaction of the two-body subsystem. For given parameters of the two...
The β-delayed neutron and γ spectra of neutron-rich nucleus 21N using β-γ and β-n coincidence measurements were presented in this paper. Thirteen new neutron groups ranging from 0.28 MeV to 4.98 MeV a...
报道了在13.5-14.6MeV中子能区用活化法测得的112Sn(n,2n)111Sn,118Sn(n,2n)117Sn 和 124Sn(n,2n)123mSn的反应截面值. 中子注量用93Nb(n, 2n)92mNb或27Al(n,α)24Na反应截面得到.单能中子由T(d, n)4He反应获得. 同时还列举了已收集到的文献值以作比较.
40Ca的热中子辐射俘获截面实验值远较统计理论及Lane-Lynn直接俘获理论预言的截面值大. 本文指出, 这是一个位阱俘获与价俘获的干涉增强效应的例子. 使用普适的光学模型位阱并考虑了这一干涉效应, 计算了40Ca的热中子辐射俘获截面、散射截面和41Ca的p3/2中子束缚能, 并与实验值进行了比较.
采用无窗气体靶技术测量了15—150keV的氘-氘以及13.8—114.3keV的氘-氚反应截面, 误差≤±5.1%. 实验是分别在50kV、150kV、300kV三台倍加器上进行的. 测量分绝对微分截面与相对微分截面测量两步进行. 在完成测量数据的实验过程中, 相应地发展了氚操作技术与加速氚、束流热测法(量热器)以及对气体的压力、温度、纯度绝对值测量等方面的技术.

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