It is pointed out that the radiation trapping of lower laser level could be restrained effectively by reducing the tube radius, resulting in the increase of de.
从纵向纳秒脉冲放电的铜离子紫外激光动力学机理出发,得到了激光上、下能级形成粒子数反转所需的必要条件,理论分析了其功率随放电管孔径减小而迅速增加的实验现象,指出放电管孔径的减小能够有效抑制激光下能级辐射俘获的发生,从而提高了激光下能级的排空速率,使得激光功率增加。
We present an expression of radiation trapping forces acting on a multilayered spherical particle in a Gaussian beam by using the theory of electromagnetic momentum,and,as an example,numerical results are given to an axial two-layer absorbing spherical particle,along with a discussion about the influence of the beam waist radius,relative complex refractive index an.
根据对电磁场动量的讨论,得出了高斯波束对多层球形粒子的辐射俘获力的表示式,并就单高斯波束对在轴双层有吸收粒子受到的辐射俘获力进行了数值模拟,讨论了束腰半径、吸收系数、内外层相对厚度对俘获情况的影响。
Using the hypothesis as well as the γ-ray strength function proposed by us, the neutron radiative capture reaction cross sections and the γ energy spectra have been calculated for 93Nb,natural Ag and 181Ta in the neutron incident energy region from 0 01 to 5MeV as well as for 197Au in the neutron incident energy region from 0 01 to 10MeV.
0 1— 5MeV能区以及在核素1 97Au上入射中子能量在 0 0 1— 10MeV能区的中子辐射俘获反应截面和γ能谱 ,得到了与实验数据较好符合的结果 。
The mass number dependence and the neutron incident energy dependence of the radiative capture cross sections from various reaction mechanisms of the neutron radiative capture process have been examined in the nuclear mass region A <100.
对A <10 0核质量区内的核素 ,研究中子辐射俘获反应中不同反应机制对辐射俘获截面的贡献随靶核质量数和中子入射能量变化的规律 。
Resonance radiation trapping in Ca,Sr,Ba and Hg ion lasers;
钙,锶,钡和汞离子激光中的共振辐射俘获效应