| 1. | The dipole oscillator sum can be expressed in terms of the integrated photo absorption cross section .
偶极谐振子和可以用积分后的光子吸收截面来表示。 |
| 2. | Excited state absorption cross sections are obtained through z - scan curve fitting
通过曲线拟合，得出了它们的激发态吸收截面。 |
| 3. | Experimental study on temperature dependence of ultraviolet absorption cross - sections of sulfur dioxide
2紫外吸收截面温变规律实验研究 |
| 4. | The charger - transferred processes of the charge - transferred states are displayed in order to understand their maximal two - photon absorption cross sections
中心部分的特性有关。同时，我们还给出了分子电荷转移态的电荷迁移过程。 |
| 5. | Double cladding fiber characteristic parameters ( doped rare - earth concentration in core , confinement factor , absorption cross and emission cross ) are calculated theoretically
理论计算了双包层掺杂光纤特性参数(纤芯的稀土掺杂浓度、限制因子、吸收截面和发射截面) 。 |
| 6. | The result indicates that , with the increase of polarity of the solvent , the excited energies are red - shifted and the two - photon absorption cross sections augment
论文的研究结果表明：一般的，随着溶剂极性的增加， tpa截面最大值处对应的入射光子的波长红移， tpa截面最大值随溶剂极性的增加而逐渐增大。 |
| 7. | Zircaloy - 4 is generally used as fuel tubes in pressurized water reactors because of it " s low neutron absorption cross - section , excellent corrosion resistance , good strength and ductility
由于锆4合金具有低的中子吸收截面，良好的抗腐蚀能力、高强度以及延展性好的特点，被广泛用于压水堆作为核燃料棒的包壳材料。 |
| 8. | As a new solid laser material in recent years , cr4 + : yag crystal has super advantages , such as big absorption cross section , stable saturable absorption , good heat - conducting and mechanical performance
Cr ~ ( 4 + ) yag晶体作为近年来人们发现的新型固体激光材料，具有吸收截面大、可饱和吸收稳定性好、热传导性和机械性能良好等优点。 |
| 9. | The study result indicate that , the asymmetry substituted molecules display larger two - photon absorption cross sections than the symmetry substituted molecules , which illustrates that the effect of the different substitutions on molecule ' s two - photon absorption property is related to the property of molecule ' s - center
98程序包上完成。结果表明在此五种化合物中具有不对称结构的分子具有更大的双光子吸收截面。因此，分子的对称性是否比不对称性更有利于增大分子的双光子吸收截面，还与分子的。 |
| 10. | We have calculated one - and two - photon absorption cross sections of the lowest excited states of a series of molecules combined with benzene , stilben , thiophene as center attached with amine , diphenylamine , diethylamine as electron - donor and nitryl as electron - acceptor ; the effects of molecular length , n center and electron - donor on two - photon absorption cross sections have been studied and all calculations have been carried out using the density functional theory at an ab initio level . it is found that the molecular length and the one - photon absorption intensity are quite strongly c orrelated factors , and that a corresponding correlation for the two - photon absorption is decreasing . it is also found that a most crucial role for the two - photon absorption is played by the n center
我们分别以苯、二苯乙烯、噻吩为中心，氨基、二苯氨基和二乙氨基为电子给体，硝基为电子受体组合形成的分子为研究对象，在从头计算的水平上用密度泛函理论计算了这些分子在低激发态下的单、双光子吸收强度，重点研究了分子的长度、中心和给体的供电子能力对分子单、双光子吸收的影响。研究结果表明，分子长度与单光子吸收强度之间有密切关系，而在双光子吸收中这种关系较弱；中心在双光子吸收中具有重要的作用；在中心和受体一定的情况下，增加给体的供电子能力，可提高双光子吸收强度。 |
