阈能 meaning in English
threshold energy
Examples
- If the incident proton collides with a proton bound in a nucleus, the threshold energy is lower because the target proton is bound .
如果入射质子是与束缚在原子核内的质子相碰撞，那么阈能会低一些，因为作为靶的质子是束缚着的。 - It was found that the simple triangular shape distribution would cause " two - peaked " energy distribution near the threshold energy , which must affect the group transfer matrix
阈能处三角形能谱分布的近似描述，导致产生了群散射矩阵的“双峰”现象，而阈能处矩形能谱分布使平均次级中子能量( - The relative momentum of two final particles and the cross section are zero at the threshold energy for an endothermic reaction , while the relative momentum of two initial particles is zero and the cross section at the threshold energy for an exothermic reaction is infinite
在吸热反应的阈能处，出射粒子的相对动量以及截面均为零。在放热反应的阈能处，入射粒子的相对动量为零，截面趋于无穷大。由于强子的动量仅提供如此低的质心系能量，强子物质中x 。 - It is shown that the results calculated using the ccdwa are agreement with one of the accurate quantum mechanics employing the same potential . quantum mechanical tunneling is important in near threshold , and classical trajectory calculation is not good for prediction of the cross sections . the reaction cross sections calculated using different potentials is different , which show that the investigation of reaction cross section can provide evidence for test of accuracy of the potential energy surface
研究发现：势能面相同时用ccdwa方法计算的截面和公认精确的量子力学结果比较符合；阈能附近的量子力学隧道效应较为显著，准经典弹道方法不能很好的预言其截面；用不同势能面计算的反应截面有差别，说明反应截面的研究能为检验势能面的准确性提供依据。