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中能区     
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  medium energy region
     The methods to calculate the energy spectra of all kinds of emitting light particles and recoil nuclei for multilevel particle emission in medium energy region(≤250?MeV), comparison of the efficiency between this method and the traditional one and two calculated examples are given. 
     给出了在中能区(≤250MeV)多次粒子发射过程中计算各种出射轻粒子及各种反冲核之能谱的方法,指出它的计算效率远高于(两个数量级以上)传统方法,并给出了两个算例.
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  middle energy region
     In the middle energy region,that is,12.5520≤E_t≤37.6560 kJ. mol~(-1),their reaction rates are almost the same because of the strengthen of the structural transformation and dissociation of the two complexes caused by the increase of energies.
     在中能区(12.5520≤Et≤37.6560 kJ.mol-1),空间位阻因素减弱,能量因素加强,两者的反应速率接近相等;
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  intermediate energy region
     The real parts of the optical potentials for n+40Ca and n +208Ph in the intermediate energy region are self-consistently calculated by utilizing Green function theory, nuclear matterapproximation and the semi-classical variation approach.
     利用Green函数理论、核物质近似和半经典变分方法,自洽地计算了中能区n+40Ca系统和n+208Pb系统的光学势实部。
短句来源
     On the basis of the Skyrme interaction, the nuclear matter approach and the self-consistent semi-classical (SCSC) approach, the self-consistent study of microscopic optical potential (MOP) is generalized to the intermediate energy region (60-300MeV). The radial shape and the temperature effect of n + 90Zr optical potential are studied.
     本文在Skyrme相互作用、核物质近似和自洽半经典方法的基础上,将微观光学势的自洽研究推广到中能区(60~300MeV),研究了n+~(90)Zr在该能区光学势的径向形状和温度效应.
短句来源
     The differential cross sections and the spin observables of p-~(12)C elastic scattering in the whole intermediate energy region are calculated in the Glauber theory.
     应用Glauber多次散射理论,对于p~-~(12)C弹性散射微分截面和自旋观测量在整个中能区进行了系统性的计算。
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     2)To drive R_(Cd) formula based on standard thermal average activation cross-section andresonance integral and to define all related parameters or factors including these in thermal energyregion and these in intermediate energy region.
     2)导出以标准热中子平均活化截面和标准共振积分为基础的R_(Cd)公式,并定义有关参量,包括热能区和中能区的参量。
短句来源
     Temperature Effects of the Optical Potential in the Intermediate Energy Region
     中能区光学势的温度效应
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  medium energies
     INFLUENCE OF THE △-ISOBAR EXCITATION ON(γ,p) REACTION AT MEDIUM ENERGIES
     △共振激发对中能区(γ,p)反应的影响
短句来源
     Studies of Radial Expansion Energy in HIC at Medium Energies
     中能区重离子碰撞中径向膨胀能量研究
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      intermediate energy region
    A more accurate description of the intermediate energy region is also obtained.
          
    The theoretical PDI total cross-section shows a relevant improvement in the intermediate energy region relative to the C3 model, which converges to data for photon energies larger than 1 keV.
          
    The infrared and intermediate energy region (0.4GeV >amp;lt; p >amp;lt; 1.5GeV) is found to be most relevant for DCSB from analysis on the relation between the SD kernel and the quark mass function.
          
    Furthermore, we present a comparison of perturbative QCD results (plus certain sum rules corrections) with non perturbative results from the lattice in the intermediate energy region.
          
    Consequently, although it is suppressed by the factor , the twist-3 contribution is comparable with and even larger than the leading twist (twist-2) contribution at intermediate energy region of being .
          
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    The intermediate and fast neutron flux spectrum in the core of the swimming-pool reactor is measured by multiple foil activation method. There are 22 kinds of foil detectors chosen for the measurement, including 9 intermediate and 13 fast threshold foil detectors. They are irradiated ill the core position in cadmium box with 1 mm wall thick. Absolute foil activities from which reaction rate is determined are mainly measured by γ-spectrometer. The energy range from 0.28 eV to 18.5 MeV is divided into 470 energy...

    The intermediate and fast neutron flux spectrum in the core of the swimming-pool reactor is measured by multiple foil activation method. There are 22 kinds of foil detectors chosen for the measurement, including 9 intermediate and 13 fast threshold foil detectors. They are irradiated ill the core position in cadmium box with 1 mm wall thick. Absolute foil activities from which reaction rate is determined are mainly measured by γ-spectrometer. The energy range from 0.28 eV to 18.5 MeV is divided into 470 energy groups. Neutron shielding factors of the foil are calculated for each group in intermediate energy range with detail consideration of cadmium filter and scattering by the foil itself. And from these factors effective neutron activation cross sections are obtained. The approximate neutron flux spectrum is calculated by the iteration method and spectrum errors are calculated by MonteCarlo method. From obtained spectrum one can evaluate spectrum average cross sections of each foil above 0.5 or 1 MeV for other applications. In this work flux spectrum process, evaluation of spectrum errors and activation determinations are described in detail. The specification of detector foils, reaction rates and its errors and calculated flux spectra are given. At last the convergence of iteration method and fluctuations of obtained spectra are discussed.

    用活化箔技术測定游泳池反应堆內中能中子与快中子通量谱。选择22种探测箔,其中9种是中能的,14种是快中子阈探測箔。探測箔放在1mm壁厚的鎘盒內照射。主要用γ譜仪测量絕对活性值,从而求出单核反应率。将0.28eV王18.5MeV的整个能区划分为470群。考虑鎘的屏蔽和探測箔的自身散射影响后的屏蔽,求出每一种探測箔在中能区各群的中子屏蔽因子,从而求得有效活化反应截面。在国产TQ-6計算机上,用多次迭代法求得近似中子譜。用蒙特卡罗方法求譜的誤差。从解得的譜計算出0.5MeV和1MeV以上各种探测器的中子活化平均截面。文中詳細介紹譜处理、譜誤差計算、活性测显等细节。給出探測箔特性参数、单核反应率及其誤差。并給出解得中子譜曲綫。最后討論迭代收斂与谱形起伏等问题。

    Microscopic optical potential calculations in the Hartree-Fock (HF) approxima-tion with Extended Skyrme forces are investigated. The HF equation is derived fromthe variation principle and the potential formula of spherical nuclei is obtained by twodifferent ways. Then the calculations for symmetric nuclei ~(16)O, ~(40)Ca and asymmetricnucleus ~(90)Zr with eight sets of Skyrme force parameters are presented. Our resultsshow that the potential form and variating tendency with incident energy are reasona-ble and...

    Microscopic optical potential calculations in the Hartree-Fock (HF) approxima-tion with Extended Skyrme forces are investigated. The HF equation is derived fromthe variation principle and the potential formula of spherical nuclei is obtained by twodifferent ways. Then the calculations for symmetric nuclei ~(16)O, ~(40)Ca and asymmetricnucleus ~(90)Zr with eight sets of Skyrme force parameters are presented. Our resultsshow that the potential form and variating tendency with incident energy are reasona-ble and there apparently appears a "wine-bottle-bottom," shape in the intermediateenergy region. Furthermore, our calculations reflect shell effects clearly.

    本文讨论了用扩展Skyrme力和Hartree-Fock方程计算微观光学势的方法。首先由变分原理导出了HF方程,并用两种不同的方法得出了球形核光学势的计算公式,然后对不同入射能量(0—350MeV)用八组Skyrme力参数计算了对称核~(16)O、~(40)Ca及非对称核~(90)Zr的微观光学势。结果表明其形状和随能量的变化趋势是合理的,在中能区出现了“酒瓶底”形状,同时明显地体现了壳效应。

    Projectile breakup in heavy ion reactions at the low side of the intermediate energy domain and incomplete deep inelastic collision, a reaction mechanism of dissipative process between target nucleus and the main part of the projectile after projectile breakup, are discussed in this paper. Some new experimental data on this subject in the energy region of 10-20MeV/u are given. The experimental results of the single and coincident measurements are interpreted in the framework of corresponding reaction mechanisms....

    Projectile breakup in heavy ion reactions at the low side of the intermediate energy domain and incomplete deep inelastic collision, a reaction mechanism of dissipative process between target nucleus and the main part of the projectile after projectile breakup, are discussed in this paper. Some new experimental data on this subject in the energy region of 10-20MeV/u are given. The experimental results of the single and coincident measurements are interpreted in the framework of corresponding reaction mechanisms.

    本文着重讨论在中能区低端的重离子核反应中的弹核碎裂及碎裂后的主要部分与靶核进一步发生耗散碰撞的反应机制——非完全深部非弹性碰撞。同时给出一些在10—20MeV/u能区的新的实验数据,并对单举和符合测量实验结果在相应的反应机制框架中进行了讨论。

     
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