1) cross relaxation
交叉弛豫
1.
Theoretic estimation of lasing threshold of a three-level systsm containing cross relaxation;
含交叉弛豫的三能级系统激光阈值的理论估计
2.
Results of meausred radioluminescence spectra show that energy transfer mechanisms occurring from Gd~(3+) cations towards Tb~(3+) emssion centers as well as the cross relaxation among Tb~(3+) cations within the certain concentration range exert tremendous effects on the emission intensity of glasses.
玻璃样品的 X 射线激发发射光谱结果显示,玻璃基质中由 Gd3+ 离子向发光中心 Tb3+ 的能量转移机制以及在一定浓度范围内 Tb3+ 之间的交叉弛豫过程对玻璃的发光性能有重要影响。
3.
Its found that the energy match between rare earth ions is realized easily by the phonon joining at room temperature,which result to cross relaxation strengthen and the lifetime of 664 nm radiation be longer.
研究结果表明 ,由于室温下声子的参与使不同稀土离子之间更容易实现能级匹配 ,增强了交叉弛豫过程 ,并使 6 6 4nm辐射在室温下有较长的寿命 ,这一结果有利于用 4F9/2 能级做中间能级实现上转换发
2) cross-relaxation
交叉弛豫
1.
8 μm emission and the cross-relaxation mechanism are discussed.
研究了碲酸盐玻璃中不同浓度Tm3+离子掺杂的发光特性,探讨了不同Tm3+离子浓度对发光强度的影响以及交叉弛豫的机理。
2.
0 μm is generated through two processes:the cross-relaxation between Tm3+,and the holmium particles population to 5I7 via the energy transfers from Tm3+ to Ho3+.
此发光包括两个过程:Tm3+之间的交叉弛豫过程;通过Tm3+与Ho3+之间的能量转移,将能量传递给Ho3+而使Ho3+跃迁至5I7能级上产生布居,当Ho3+跃迁回基态时则发出波长为2。
3.
8 μm emission with the pump power prove that the particle number in 3F4 comes from the cross-relaxation process of 3H4+3H6→23F4.
Tm3+离子3F4上粒子数主要来源于3H4+3H6→23F4的交叉弛豫过程。
3) Nuclear cross relaxation
核交叉弛豫
4) cross energy relaxation
交叉能量弛豫
5) Nuclear cross relaxation rate
核交叉弛豫速率
6) cross relaxation rate
交叉弛豫速率
1.
The re- sults show thatthe cross relaxation rate at LD pumping depends on the doped Tm3 + concentration and has a quite speed for used samples,which will induce a rather large population of 3 F4 manifold,the energy transfer rate fro.
计算结果表明 :Tm3 + 在 80 5 nm激光泵浦下其交叉弛豫速率随掺杂的浓度不同而不同 ,但对于所研究的样品均具有相当快的速率 ,使得在 3 F4态有显著的粒子数集聚 ;随后 Tm3 + 的 3 F4 向 Ho3 + 的 5I7的能量转移速率也是随掺杂的浓度不同而不同 ,但与前者相比较慢 ,这有利于 Tm3 +对 Ho3 +的有效的敏化 。
补充资料：“质子-电子偶极-偶极”质子弛豫增强
“质子-电子偶极-偶极”质子弛豫增强
物理学术语。原子核外层中不成对的电子质量小，但磁动性很强，可使局部磁场波动增强，促使氢质子弛豫加快，从而使T1和T2缩短，这种效应即为PEDDPRE。过渡元素和镧系元素大部分在d和f轨道有多个不成对电子，所以其离子往往具有PEDDPRE，可用来作顺磁性对比剂，如钆(Gd)。Gd在外层有7个不成对电子，具有很强的顺磁性。
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参考词条