| 1. | Most of the ice age spans a period of time for which no element has an appropriate 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。 |
| 2. | The life time of the metastable n - phase state is evaluated explicitly in term of the instanton method
对于亚稳的-位相态，我们利用瞬子技术计算了它的衰变率或寿命。 |
| 3. | Geological dates are usually obtained by using the rates of decay of various radioactive elements found in minerals
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。 |
| 4. | Experiments revealed that the decay probabilities of right - spinning and left - spinning cobalt atoms were different . this phenomenon of symmetry breakdown is called the violation of the principle of parity conservation
右旋和左旋的钴获实验证明它们的衰变率并不相同，即所谓宇称不守恒。 |
| 5. | Experiments revealed that the decay probabilities of right - spinning and left - spinning cobalt atoms were different . this phenomenon of symmetry breakdown is called the violation of the principle of parity conservation
右旋和左旋的钴获实验证明它们的衰变率并不相同，即所谓宇称不守恒。 |
| 6. | 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
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。 |
| 7. | In the second part , the deduced self - energy in 63 theory is derived at hard thermal loop approximation . then we calculate the effective mass and damping rate , and also show that there is thermal instability above a critical temperature tc
在此基础上，出自能实部和虚部与一些介质效应的对应关系式，进而求得了粒子的有效质量和衰变率，并讨论了_ 6 ~ 3理论的热不稳定性。 |
| 8. | We find the decay rate of 7be in be is smaller than that in au . the change of decay rate ( 0 . 71 + 0 . 32 ) % , indicates that the environment can indeed alter the decay rate , and the electronic affinity is not the only factor affecting the decay rate , so that one has to take the structure of the host materials into account in explaining the change of the decay rate
本工作将反应p + 7li 7be + n产生的7be分别注入至预计电子亲和势相差较大的材料be和au中，测量7be在这两种材料中的衰变率的变化，发现7be在be中的衰变率要小于在au中的衰变率，其相对变化为( o |
