Effect of transmission losses on measured parameters in multi-ion coincidence momentum spectrometers

作     者：Pandey, Amrendra Bapat, B. 

作者机构：Phys Res Lab Ahmadabad 380009 Gujarat India 

出 版 物：《INTERNATIONAL JOURNAL OF MASS SPECTROMETRY》 (国际质谱测定法杂志)

年 卷 期：2014年第361卷第1期

页      面：23-27页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 0702[理学-物理学] 

主　　题：Multi-coincidence spectrometers Ion transmission losses Loss corrections 

摘      要：We address the effect of transmission losses on the measured kinematic parameters of molecular fragmentation processes in a time-of-flight based ion momentum spectrometer. We suggest means to correct for these losses for two-body fragmentation having isotropic distribution. As an example, we discuss the kinetic energy release spectrum observed in recoil ion momentum spectrometer of doubly ionized nitrogen molecules formed upon high energy electron impact. Further, we highlight the difficulties in calculating losses in many-body fragmentation and anisotropic emissions and show that such effects cannot be accounted without employing additional information about the process. In many cases, such information cannot be extracted from the observed data in the experiment and thus we have to rely on careful assumptions. (C) 2014 Elsevier B.V. All rights reserved.