阈能

中学生可以利用这种方法计算核反应的阈能问题。

Middle school students can calculate threshold energy in this way .

对核反应阈能的讨论

A Discussion on the Threshold Energy of Nuclear Reaction

研究了核内△N→NN散射截面的介质效应，发现阈能附近的△吸收截面在介质中被压低。

The medium effects on the △ N → NN cross section is investigated , and it is found that the effective cross sation is suppressed in the medium near the threshold energy .

较系统地研究了特定条件下Fe活化箔活化γ谱测量及解谱等相关技术，包括高阈能探测器的自吸收、自屏蔽、扰动等影响。

In this article it is comparatively systematically studied on the related measurement technique of Fe foil 's activated γ spectrum and resolving-spectrum under specifical conditions , including high-threshold-energy detectors , self-absorption , self-sheilding and perturbation and so on .

研究结果指出，前两个反应在H的初始振动基态时的反应阈能分别为20kcal·mol－1和65kcal·mol－1，反应阈能随振动量子数增大而减小。

It is shown that the threshold energy for the first and second reactions , at the vibrational ground state of H , are 20 kcal · mol-1 and 65 kcal · mol-1 , respectively .

由于super-Coster-Kronig过程，在3p电子的阈能区间得到了加强型共振结构。

The resonance structure in the region of the 3p threshold is enhanced via a super-Coster-Kronig transition .

计算表明，在ABINITIO势能面上，Br+H2的反应阈能要比e-LEPS势能面上的反应阈能低一些，而且ABINITIO势能面上的反应几率、反应截面和速率常数都要大许多。

It was shown that on ab initio surface the reaction threshold energy was much lower , the reaction probabilities , cross sections and rate constants were much larger than on extended LEPS surface .

证明了与各粒子对应的Regge轨迹在阈能以下是能量的单调增加函数，当t→±∞时，每一轨迹的渐近极限是相同的。

It has been shown that the Regge trajectories corresponding to the different particles are monotonic increasing functions of energy below the threshold and the asymptotic limits of every trajectory are the same for t →±∞ .

论证了激光分离铀同位素阈能反应分子法在高浓铀小规模（10kg／a）生产中的可行性。

It is shown that it is able to produce highly enriched uranium in a small scale of 10 kg / a using so called threshold chemical reaction method for laser-based separation of uranium isotopes in molecular forms .

阈能反应分子法激光分离铀同位素

Threshold chemical reaction method in molecular forms for laser-based separation of uranium isotopes

14MeV中子在组合材料上高阈能活化反应率的测量和计算

Measurement of high-threshold-energy activation reaction rates in combined materials with 14 MeV neutrons

正确理解光电效应中的阈能

A Better Understanding For The Doorsill-energy of Photoelectric Effect

阈能的初等物理求法探讨

The Primary Physics Calculation Inquiry of Threshold Energy

核物质对称能和重离子碰撞中径向流阈能的同位旋效应

Symmetry energy and isospin effects of threshold energy of radial flow in heavy ion collisions

在核物理学里，求阈能一般用坐标变换的方法。

In nuclear physics , threshold energy is generally calculated by the method of coordinate transformation .

粒子反应中初态粒子的阈能和末态粒子的最大能量问题

Threshold energy of the initial state and maximum energy of the final state in particle reactions

低于阈能的中子探询技术

Subthreshold neutron interrogation technique

移位阈能随着纳米管直径的增加而增加。

The displacement threshold energy also shows size dependence , which increases with the diameter of SiC nanotubes .

另外，反应物处于基态时的绝对反应截面与实验具有相同的阈能和上升趋势。

The calculated absolute cross sections for ground state of HF have identical threshold energy and similar trend with experiment .

可使吸能核反应发生的入射粒子的最小动能称为阈能。

Threshold energy is defined as the minimalist kinetic energy of the incoming particles which can cause the endergonic nuclear reaction .

研究的深入呼唤高灵敏、低阈能、宽视场、全日制的地面观测手段。

Its further development requests the presence of a sensitive and low threshold detector with full sky & full time observation mode .

用屏蔽法检验了散射本底中子影响，高阈能探测器本底中子的影响很小。

The experimental-shielding method is used to proof-test the fraction of scattered background neutrons , and for high-threshold detectors , the influence of background neutrons is very small .

结果表明：该探测器对快中子的探测阈能约为100keV，阈能处中子探测效率急剧上升约3个数量级，阈能以上效率曲线基本平坦，中子探测效率约为15×10-4。

It shows that the bubble detectors have a threshold energy ~ 100 keV . The detection efficiency increases steeply to three order of magnitude at the threshold .

主要用于研究非稳定核素的结构、核天体物理中相关核的阈能共振态的能级参数测量等。

This method is mainly used in the investigation of unstable nuclei and the level parameters measurement of near threshold resonant state of the nuclear astrophysics related nuclei .

计算结果表明，它是一个无阈能的向后散射的碰撞反应，但具有0.22kcal/mol的小活化能，并且产物能量主要分配在平动能和振动能。

The results show that it is a backward-scattering reaction with no threshold energy . But there exists a tiny activation energy of 0.22kcal/mole . About 42 % of the energy release is translation , 38 % vibration and 20 % rotation .

遵循核反应中的电荷守恒、质量守恒、能量守恒、动量守恒，用初等物理的方法也可求解阈能，并适用与各种不同的碰撞类型。

By the principles of the electric charge conservation , the mass conservation , the energy conservation and the momentum conservation in the nuclear reaction , threshold can be calculated with the methods of primary physics and can be applied to various collision types .

分析结果说明：1）阈能附近碎块角分布可以用裂变是通过鞍点上少数转动带（每一带具有确定的宇称）来解释；

The results of this analysis show : ( 1 ) The angular distribution of the fission fragments , in the region near the threshold , can be explained by a few rotational bands ( every band has a definite parity ) above the saddle point .

为了提高测量精度和检查速度，采用了计算机数字卡阈、能阈的自动跟踪和自动校正及双峰双窗技术。

The digital discrimination , self-tracing and self-adjusting of threshold energy , and two-peak and two-window techniques are used to increase the measuring accuracy and testing speed .

无氧阈功率能较好地反映速滑运动员的有氧代谢能力，可用于对训练效果的评定和对训练过程的监控；

Anaerobic threshold power can reflect the aerobic metabolic capacity so well that this method can be applied to evaluate the training effect and to control the training course .

该方法适用于低于离化阈的所有能区的精确谱计算并易于推广到非氢原子、交叉场中的原子以及高于离化阈的正能区光谱的计算。

The method presented in this paper can be extended easily to the region with positive energy and to the cases of non-hydrogen atoms and the crossed field problem .