衰变率

用液体闪烁计数器测定~（14）C、~（35）S的衰变率

Determining the disintegration rate of ~ ( 14 ) c , ~ ( 35 ) s by using liquid scintillation counter

由Cox-Isham公式计算的N1N2/Ne随阳极电流而变化，当阳极电流的倒数趋于零时，外推N1N2/Ne求得衰变率。

The value N_1N_2 / N_0 calculated with Cox-Isham formula varies monotonously with the anode current , but the disintegration rate can be obtained with the extrapolation of N_1N_2 / N_0 as the inverse anode current is approaching to zero .

其有效质量和衰变率则分别正比于g1/2T和gT。

The effective mass and damping rate are proportional to gT and gT respectively .

~（67）Ga衰变率和~（67）Zn亚稳态有关核参数的测定

A determination of the disintegrating rate of ~ ( 67 ) Ga and measurement of related nuclear parameters of ~ ( 67m ) Zn

关于Ψ（2S）与J/Ψ衰变率比值估算的讨论

Comments on the Ratio of Hadronic Decay Rates of Ψ( 2S ) to J / Ψ

发现在临界温度Tc以上存在热不稳定性，而有效温度和衰变率则分别正比于gT和gT。

We show that there is thermal instability above a critical temperature T c. The effective mass and damping rate are proportional to gT and gT respectively .

这种测量7Be在不同材料中衰变率变化的方法在凝聚态物理中也有重要应用前景。

The method we used may find important application in condensed matter physics .

基于原子核壳层模型，分析了在强磁场作用下中子星壳层中的β衰变率，并以反应63Co（β-）63Ni为例作详细计算。

Based on the shell model of nuclei ,β decay in the strong magnetic field of the crusts of neutron stars is analyzed . The reaction () ~ ( 63 ) Co (β ~ - ) ~ ( 63 ) Ni is investigated as an example .

用电离室测定α衰变率的校正因素

The Correction Factors for Determining α - Decay Rate with Grid Ionization Chamber

用简易效率示踪法测定~3H的衰变率

The determination of disintegrating rate of tritium with a simplified efficiency tracing method

这是没有标准答案的，因为衰变率本身会随时间推移而改变。

Well it depends , because these rates tend to change over time .

人们通常用矿物中所发现的各种放射性元素的衰变率来计算地质年代。

Geological dates are usually obtained by using the rates of decay of various radioactive elements found in minerals .

它可供计量实验室建立放射性活度基准设备用，也可用于核科学研究和工程中核衰变率的绝对测量。

Also it can be used in the nuclear science and engineering research for absolute measurement of nuclear decay rate .

冰川期的大部分期间都找不到具有合适衰变率的元素。

Most of the Ice Age spans a period of time for which no element has an appropriate decay rate .

本方法概念清楚，近似假设和处理与实测规道衰变率的分辨率范围一致。

The concept of the method is clear . The assumption and the processing are in accord with the resolving range of the observed orbital decay rate .

当耦合路径上的衰变率大于探测路径上的衰变率时，探测路径上的抽运导致了非逆转增益现象的产生。

When decay rate in the coupling channel is greater than that in the probe channel , the incoherent population pumping in the probe channel can create the gain without inversion .

与三能级原子系统相比，四能级原子相干效应即可导致电磁感应透明的产生，也可产生电磁感应吸收现象，取决于控制光的强度和第四个能级衰变率的大小。

Compared with three-level atomic system , the atomic coherence effects in four-level can lead to EIT and EIA , which depend on the intensity of control light and the relaxation of the fourth level .

考虑β粒子的零几率，计数率同时随阳极电流而改变，当阳极电流的倒数趋于零时，计数率趋干衰变率。

Taking the zero probability for β particles detection into account , it is shown that the count rate varies monotonously with the anode current and tends to the inverse anode current is approaching to zero .

在有限温度下运用硬热圈近似求得φ36理论单圈自能，进而求得有限质量和衰变率。

We calculate the effective mass and damping rate in φ 3 6 theory at finite temperature by evaluating the real and imaginary parts of the one loop self energies at the hard thermal loop ( HTL ) approximation .

我们观察到的一个现象就是社会科学的衰变率比自然科学要快得多，因为社会科学在实验水平上存在的“噪音”要大得多。

One thing we have seen is that the social sciences have a much faster rate of decay than the physical sciences , because in the social sciences there is a lot more " noise " at the experimental level .

本文根据人造卫星大气阻力摄动运动方程和卫星轨道衰变率的测定方法，给出一种利用卫星轨道衰变率反测高层大气密度的实用且简便的方法。

According to the atmospheric drag perturbation equation of satellite motion and the method of determination of orbital decay rate , a practical and convenient method for determining air density from satellite orbit decay rate has been presented in this paper .

在分析不同情形超子衰变的基础上，给出超子衰变对超子产生率和末态超子极化的贡献的一般计算公式。

By analyzing different hyperon decay processes , we derive the general formula for the decay contributions of heavier hyperons to hyperon production rates and final-state hyperon polarizations .