基于反应显微成像谱仪测定氮、氧同位素的方法研究
The study of measuring isotope of nitrogen、oxygen based on reac-tion microscope spectroscopy
石晓华 1李雨田 2贾少奎 1周家琪 1曹子君 1任雪光1
作者信息
- 1. 西安交通大学物理学院,陕西西安 710000
- 2. 火箭军工程大学基础部,陕西西安 710025
- 折叠
摘要
同位素在农业、医学、军工武器、能源环境等领域都发挥着重要作用,同位素的测定在其应用过程中尤为重要,本文给出了一种新的基于反应显微成像谱仪的同位素测定手段.氮和氧是构成空气主要成分氮气和氧气的基本元素,同时对于生物体的各项生命活动具有重要意义.由于氮、氧元素在自然界均具有稳定的同位素且存在显著的同位素效应,因此关于它们同位素的测定就非常重要.本文借助第三代反应谱仪即反应显微成像谱仪装置,选取氮气和氧气为靶气体开展电子碰撞实验,成功测定出氮和氧靶气体中的同位素,同时在结果中得到了和自然界中相同的同位素丰度比,验证了利用反应显微成像谱仪测定同位素的可靠性,能区分质量分数仅相差一的同位素也证明当前反应谱仪装置具备超高测量精度.
Abstract
Isotopes play an important role in agriculture,medicine,military weapons,energy and environ-ment,et al.so the detection of isotopes is particularly important.A new method of isotope identification based on reaction microscope spectroscopy is presented in this paper.The nitrogen and oxygen are the basic elements that make up the main components of air and they play an important role in all kinds of life activities.Because nitrogen and oxygen have stable isotopes and significant isotopic effects in nature,the determination of their isotopes is very important.In this paper,nitrogen and oxygen are selected as target gases to carry out electron collision experiments with the help of the third-generation reaction spectrometer,namely the reaction microscopic imaging spectrometer.Isotopes in the target gases of ni-trogen and oxygen are successfully determined,and the same isotope abundance ratio as in nature is ob-tained in the results,which verifies the reliability of isotope determination by the reaction microscopic imaging spectrometer.The ability to distinguish isotopes with only one difference in mass fraction also demonstrates the extremely high measurement accuracy of current reaction spectrometer devices.
关键词
同位素/反应显微成像谱仪/飞行时间(TOF)谱/丰度比Key words
isotope/reaction microscope spectroscopy/time of flight(TOF)spectrum/abundance ratio引用本文复制引用
基金项目
国家自然科学基金(11974272)
国家自然科学基金(11774281)
国家自然科学基金(11875219)
火箭军工程大学青年基金(2021QN-B030)
出版年
2023
NETL
NSTL
维普
万方数据