| 1. | Time-reversal invariance predicts equality of transition probabilities for a reaction and its inverse .
时间反演不变性预言，一个反应和它的逆反应，其跃迁几率相等。 |
| 2. | Energies and transition rates of low - lying excited states for beryllium
铍低激发态的能量和跃迁几率 |
| 3. | The spectra parameters of these crystals can be calculated by the f - l formula , which show that the crystals are applicable for the tunable laser and femtosecond laser because of their large emission broadband ( fwhm 50nm )
用f ? l公式计算了晶体yb3 +的2f7 / 2 2f5 / 2能级跃迁的发射截面、辐射跃迁几率、辐射寿命等光谱参数。 |
| 4. | According to the ratio of the intensities of the double lines , the ratio of transition probability of the double lines was deduced . compared with the theoretical value , we found they coincided with each other exactly
对a1原子共振双线( ali394 . 40nm和ali396 . 15nm )的谱线线型进行分析，扣除连续谱线的影响，计算谱线强度比，得到其跃迁几率比是w _ 1 w _ 2 ( |
| 5. | Then we focus on the relationship between the current and the transition width . for small temperature , as well as for very high temperature the current does not inflect with the change of the transition width . at the appropriate temperature , the current increases with the transition width increasing
然而在适当的温度范围内，允许粒子在一定宽度内跃迁，粒子在这一范围内出现几率增加，就使得更多的粒子跃迁几率增加，产生了较大的几率流。 |
| 6. | For the sake of the practical application , the 1s to 2p transitional spectra of the group composed by na10 + and al12 + or another group composed by mg11 + and si13 + will be selected to use in the calculation about relation of relative intensity of spectra and electronic temperatures for making theoretical values approaching practice
计算所得的能级跃迁波长、自发跃迁几率a 、受激跃迁几率gb和振子强度是对实验所用光谱数据的补充。此外研究表明，利用z = 2的不同元素作示踪元素进行温度诊断是合理可行的。 |
| 7. | The dynamics is described by the glauber - type stochastic progress with the single - spin transition meehanism and disposed approximately by weighted average method in which we add a corresponding weight to each possible configuration . we obtain not only the exact analytical solutions of the time dependent magnetization and equal time spin - pair correlation functions , but also the analytical temperature dependent dynamical relaxation function
通过采用加权平均的近似处理方法，也就是对各种可能出现的跃迁几率赋一个相应的权重，我们不仅可以得到随时间演化的磁化强度和等时对关联的解析解，还得到了系统驰豫时间的温度解析函数。 |
| 8. | By using the multi - configuration dirac - fock ( mcdf ) method , the effects of relaxation and correlation on the transition energies and probabilities of electric - dipole allowed ( el ) resonance and intercombination transitions for 2p53s3 - 2p6 in neutral neon have been systematically studied firstly . and the results of the transition energies and probabilities ( lifetimes ) in length and velocity gauge have been presented . during the calculation , in order to consider the rearrangement effects of the bound - state density and some important correlations , the asfs of transition initial - and final - states were divided according to their angular - momentum and parity and calculated , and different number of csfs were included in the expansion of asfs
本文利用多组态dirac - fork ( mcdf )理论方法，通过对辐射跃迁初、末态电子波函数的独立计算以及在原子态波函数的展开中考虑不同数量的组态波函数，系统地研究了弛豫和相关效应对中性ne原子2p ~ 53s ~ ( 1 . 3 ) p _ 1 ~ o - 2p ~ 6 ~ 1s _ 0电偶极共振和复合跃迁的能量以及跃迁几率的影响，给出了长度和速度两种不同规范下激发态的能量和辐射寿命；以中性ne原子的研究为基础，进一步研究了类ne等电子系列离子( z = 11 - 18 )较低的激发组态2p ~ 53s和基组态2p ~ 6的能级结构以及各能级间的辐射跃迁特性。 |
| 9. | Comparing of the ratio of 550nm emission intensity to 525nm in samples annealed at different temperature and times , the results obtained from a fit of the integrated intensity for these two emission indicated the change of radiative transition probability at different energy level are different
通过比较不同退火温度和时间样品的两者发光变化的不同，发现两者的激发机理不同。通过比较不同样品的525nm和550nm发射强度比值随退火条件的变化以及这两个发光的积分强度的变温拟合结果说明退火对不同能级的辐射跃迁几率的影响不同。 |
| 10. | The " allowed " electric dipole ( el ) transitions will encounter strong competition from " forbidden " transitions , i . e . magnetic dipole ( ml ) , electric quadruple ( e2 ) and other higher order transitions , the transitions rates for the forbidden decay scale with higher powers of z than those of el transitions , the effects of quantum electrodynamics ( qed ) also scale with higher power of z . accelerator - based beam - foil spectroscopy ( bfs ) is an important method for spectroscopic studies of highly ionized atoms
在高离化态原子中，磁相互作用明显增强， “允许的”电偶极( e1 )跃迁将遭到来自磁偶极( m1 ) 、电四极矩( e2 )和其它高次的“禁戒”跃迁的强烈竞争，禁戒跃迁几率随核电荷数z增加而迅速增加，此外量子电动力学效应也随着z增加而增强。 |
