首页> 外文期刊>Journal of Quantitative Spectroscopy & Radiative Transfer >Radiative lifetimes of several low-lying doublet and quartet electronic states of diatomic boron carbide
【24h】

Radiative lifetimes of several low-lying doublet and quartet electronic states of diatomic boron carbide

机译:几种低洼双峰和四重奏电子碳化硼的辐射寿命

获取原文
获取原文并翻译 | 示例
           

摘要

Several experimental groups have measured the rovibrational transitions of B-4 Sigma(-) - X-4 Sigma(-), 2(4)Pi - X-4 Sigma(-), B-4 Sigma(-) - A(4)Pi, and d(2)Sigma(+) - a(2)Pi systems of diatomic boron carbide. However, no transition properties between any electronic states of this molecule have been calculated. This work studied the transition dipole moments between the X-4 Sigma(-), A(4)Pi, B-4 Sigma(-), 1(4)Delta, 1(4)Sigma(+), and 2(4)Pi states, between the a(2)Pi, b(2)Sigma(-), c(2)Delta, and d(2)Sigma(+) states, and from the a(2)Pi(3/2) and a(2)Pi(1/2) states to the X-4 Sigma(-)(3/2) and X-4 Sigma(-)(1/)(2) states. The radiative lifetimes are on the order of 10(-2) - 10(-4) s for the 1(4) Sigma(+) state, 10(-3) - 10(-4) s for the A(4)Pi state, 10(-4) s for the 1(4)Delta state, 10(-4) - 10(-5) s for the c(2)Delta state, 10(-5) s for the b(2)Sigma(-) and d(2)Sigma(+) states, and 10(-7) s for the B-4 Sigma(-) and 2(4)Pi states. The B-4 Sigma(-) - X-4 Sigma(-) , 2(4)Pi - X-4 Sigma(-), 2(4)Pi - A(4)Pi, and 2(4)Pi - B-4 Sigma(-) transitions are strong. The transitions from the a(2)Pi(1/2) and a(2)Pi(3/2) states to the X-4 Sigma(-)(1/)(2) and X-4 Sigma(-)(3/2) states are weak. The emissions originating from the a(2)Pi(1/2) and a(2)Pi(3/2) states at higher vibrational levels are easier to measure than those at lower levels. The radiative lifetimes are approximately 10(0) - 10(3) and 10(0) - 10(2) s for the a(2)Pi(1/2) and a(2)Pi(3/2) states, respectively. The band origins, Franck-Condon factors, and Einstein A coefficients of all dipole-allowed transitions were calculated. The distribution of radiative lifetime varying with rotational angular quantum number was investigated for the A(4)Pi, B-4 Sigma(-), 2(4)Pi, b(2)Sigma(-), and d(2)Sigma(+) states. The transition properties reported in this work can provide useful guidelines for future experimental and theoretical studies. (C) 2020 Elsevier Ltd. All rights reserved.
机译:几个实验组测量了B-4 Sigma( - ) - X-4 Sigma( - ),2(4)Pi-X-4 Sigma( - ),B-4 Sigma( - ) - a(4 )PI,D(2)Sigma(+) - 硅化硼的A(2)PI系统。然而,已经计算了该分子的任何电子状态之间的过渡特性。这项工作研究了X-4 sigma( - ),a(4)pi,b-4 sigma( - ),1(4)Δ,1(4)Σ(+)和2(4)之间的过渡偶极子矩)PI状态,在a(2)pi,b(2)sigma( - ),c(2)δ和d(2)sigma(+)状态之间,以及a(2)pi(3/2 )和(2)pi(1/2)态到x-4 sigma( - )(3/2)和x-4 sigma( - )(1 /)(2)州。辐射寿命为1(4)Σ(+)状态,10(3) - 10(-4)S的10(-2)-10(-4)S的顺序为A(4) PI状态,10(-4)秒为1(4)阶Delta状态,10(-4) - 10(-5)S用于C(2)Δtem,10(-5)S为B(2 )Sigma( - )和D(2)Sigma(+)态,B-4 sigma( - )和2(4)个PI州的10(-7)S。 B-4 sigma( - ) - X-4 sigma( - ),2(4)PI-X-4 Sigma( - ),2(4)PI - A(4)PI,2(4)PI - B-4 Sigma( - )过渡强劲。从A(2)Pi(1/2)和(2)pi(3/2)的转变为x-4 sigma( - )(1 /)(2)和x-4 sigma( - ) (3/2)国家弱。源自A(2)PI(1/2)和A(2)PI(3/2)状态下的排放比较高振动水平更容易测量比下层的较低水平。用于A(2)Pi(1/2)和A(2)PI(3/2)的辐射寿命约为10(0) - 10(3)和10(0) - 10(2)秒,分别。频带起源,Franck-Condon因子和爱因斯坦计算了所有允许偶极转换的系数。针对A(4)Pi,B-4 sigma( - ),2(4)Pi,B(2)Sigma( - )和D(2)Sigma研究了用旋转角度量子数随旋转角度量子数而改变的辐射寿命的分布变化。 (+)国家。本工作中报告的过渡属性可以为未来的实验和理论研究提供有用的指导原则。 (c)2020 elestvier有限公司保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号