Absolute Cross Section Measurements for the Production of NIand NII Fluorescense through Photoexcitation on N 2

通过 N 2 光激发产生 NI 和 NII 荧光的绝对截面测量

• 批准号: 9100609
• 负责人: Chung-Yung Wu
• 金额: $ 19万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1994-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9100609&HistoricalAwards=false
• 关键词: Absolute; Cross; Section; Measurements; Production

This grant supports work to measure the fluorescence cross sections for producing the NI 120nm emission from photodissociative excitation of N2 from their respective thresholds to 200A. Such cross sections are required for accurate quantitative analysis and for assessments of models of the Earth's nitrogen dayglow. The proposed work on the NI 120nm measurements will be carried out with existing instrumentation which has been developed by the present group for use with light sources at USC and the synchrotron radiation source at the University of Wisconsin Synchrotron Radiation Facilities. A small Seya-Namioka type monochromator with a spectral bandwidth of 10A is required for the NII measurements. It is hoped that it will also be possible to measure the cross section functions for producing (1) the NI 113.4, 142.1, 149.3, and 174.3nm emissions from N2 and (2) the OI 130.4 and OI 135.6nm, and OII 102.5nm from O2.

该赠款支持测量荧光横截面的工作，以从N2从其各自的阈值到200a产生Ni 120nm发射。 这样的横截面是准确的定量分析和对地球氮dayglow模型的评估所必需的。 NI 120NM测量的拟议工作将使用现有仪器进行，该仪器已由本组开发，用于与USC的光源一起使用，威斯康星大学同步加速器辐射设施的同步辐射源。 NII测量需要一个小的Seya-Namioka型单色仪，具有光谱带宽为10a。 希望还可以测量产生（1）NI 113.4、142.1、149.3和174.3nm排放的横截面函数，以及（2）OI 130.4和OI 135.6nm，以及O2的OII 102.5nm。