Optical Path Length,Temperature,and Wavelength Effects Simulation on Ozone Gas Absorption Cross Sections towards Green Communications

Ozone is a green house gas. Ozone absorption cross sections have been reported with discrepancies and inconsistencies. In this paper, simultaneous effects of the optical path length and temperature variations on ozone gas absorption cross sections are investigated at different wavelengths. HITRAN 2012, the latest available line list on spectralcalc.com simulator, is used in this study to simulate ozone gas absorption cross sections in relation to the simultaneous effects of the optical path length and temperature at the wavelengths of 603 nm and 575 nm. Results obtained for gas cells with the optical path length from 10 cm to 120 cm show that the decrease in temperatures from 313 K to 103 K results in the increase in ozone gas absorption cross sections. At wavelengths of 603 nm and 575 nm, the percentage increase of ozone gas absorption cross sections is 1.22% and 0.71%, respectively. Results obtained in this study show that in the visible spectrum, at constant pressure, ozone gas absorption cross sections are dependent on the temperature and wavelength but do not depend on the optical path length. Analysis in this work addresses discrepancies in ozone gas absorption cross sections in relation to the temperature in the visible spectrum; thus, the results can be applied to get optimal configuration of high accuracy ozone gas sensors.

Determination of Absorption Cross Section of J/ψ in Relativistic Heavy Ion Collisions

The absorption cross section σabs of J/ψ produced in relativistic heavy ioncollisions is deduced based on the analysis of the absorption length through which theproduced J/ψ passes in the colliding nuclei.The obtained σabs in A-A collisions is con-siderably higher than that in h-A processes.The reason for this different result is dis-cussed in terms of an analysis of the pT-dependence of the produced J/ψ.

Pr^(3+)/Yb^(3+)共掺碲酸盐玻璃发光特性的研究

根据Pr3+ /Yb3+ 共掺碲酸盐玻璃在 980nm附近的吸收谱及 1.3 1μm处的发射谱 ,研究了玻璃样品光谱特性随稀土离子浓度变化的规律。结果表明 :在Yb3+ 离子浓度不变的情况下 ,1.3 1μm处的发光随着Pr3+ 离子浓度的增加 ,其强度先增后减 ,并在浓度为 0 .15mol%时达到最大值 ,同时根据Judd

相对论重离子碰撞中J／Ψ吸收截面的分析

用几何模型计算了相对论重离子碰撞中产生的Ｊ／ 在核物质中的吸收长度．由此导得的Ｊ／ 在Ａ－Ａ碰撞中的吸收截面比在ｈ－Ａ过程中明显增大．通过对 与初态相互作用长度的关系的分析，说明了本文结果与过去工作不同的原因．

掺Er^(3+)铅卤碲酸盐玻璃的光谱特性研究

分别以TeO2 PbCl2、ZnO Na2O和TeO2 ZnO Na2O为基质制备了掺Er3+铅卤碲酸盐(EDTPb)玻璃和碲酸盐(EDT)玻璃。差热分析(DTA)结果表明,EDTPb玻璃具有更高的热稳定性。应用McCumber原理计算的结果表明:4mol%PbCl2的加入可使EDT玻璃在1.53μm处的发射截面提高6.7%,其峰值达8.79×10-21cm2,而有效宽度从65.8nm增加到72.3nm,因此,PbCl2的加入明显改善了玻璃的发光特性。同时应用Judd Ofelt理论对2种玻璃中Er3+的自发跃迁几率、荧光分支比和能级寿命等光谱特性进行了计算。