...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Chemical Physics >Photoabsorption cross sections of NH3,NH2D,NHD2,and ND3 in the spectral range 110-144 nm
【24h】

Photoabsorption cross sections of NH3,NH2D,NHD2,and ND3 in the spectral range 110-144 nm

机译：NH3，NH2D，NHD2和ND3在110-144 nm光谱范围内的光吸收截面

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cross sections for photoabsorption of NH3,NH2D,NHD2,and ND3 near 298 K were measured in the spectral range of 110-144 nm using radiation from a synchrotron.Absorption cross sections and oscillator strengths of NH3 agree satisfactorily with previous reports;those of ND3 are improved over those in a previous report,whereas those of NH2D and NHD2 are new.The oscillator strengths of transitions to D,D',D",F,and G states are nearly the same among all four isotopic variants,but those to D'"and E states vary substantially.Observed absorption bands are arranged into vibrational progressions in accord with known Rydberg transitions.All progressions show a common trend of vibrational intervals increasing with vibrational quantum numbers.The Rydberg orbitals for states D(3de"),D'(4sa1'),D"(3da1'),D'"(Ape'),and E(4de")are readily assigned with quantum defects determined in these experiments,but assignments for F(5de")and G(6de")are uncertain.Absorption cross sections of dissociative continua underneath discrete structures are larger for NH2D and NHD2 than for NH3 and ND3,indicating that the rate of dissociation of ammonia might increase when its symmetry is broken.
机译：NH3，NH2D，NHD2和ND3的光吸收截面使用同步加速器在110-144 nm的光谱范围内进行测量，在110-144 nm的光谱范围内进行测量.NH3的吸收截面和振荡器强度与以前的报告令人满意;与以前的报告相比有所改进，而NH2D和NHD2是新的。在所有四个同位素变体中，向D，D'，D“，F和G状态转变的振荡器强度几乎相同，但对于D'“和E态有很大的不同。观察到的吸收带按照已知的Rydberg跃迁排列成振动级数。所有的级数都显示出振动间隔随振动量子数增加的共同趋势。状态D（3de”）的Rydberg轨道D'（4sa1'），D“（3da1'），D'”（Ape'）和E（4de“）容易分配这些实验中确定的量子缺陷，但分配给F（5de”）和G（ 6de“）是不确定的。在以下条件下解离连续体的吸收截面NH2D和NHD2的所有离散结构都比NH3和ND3大，表明当氨的对称性破坏时，氨的离解速率可能会增加。

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