Diffusion and localization of o-Ps in D2O determined from positron annihilation in SDS micellar solutions |
| |
| Affiliation: | 1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, PR China;2. National Energy Research Center for Clean Fuels, Synfuels China Co., Ltd., Beijing 101400, PR China;3. University of Chinese Academy of Sciences, Beijing 100049, PR China;4. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, PR China;5. Inner Mongolia Yitai CTO Co., Ltd., Ordos, Inner Mongolia 010321, PR China;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR China;2. Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai, 200062, China;3. Skate Key Laboratory of Advanced Chemical Power Sources, Zunyi, 563000, China;1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, PR China;2. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, PR China;3. University of Chinese Academy of Sciences, Beijing 100049, PR China;4. State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, PR China |
| |
| Abstract: | ![]()
A microscopic diffusion model is presented for the determination of orthopositronium (o-Ps) lifetime in micellar solutions. Among other parameters, the lifetime density function depends on the o-Ps diffusion coefficient in the water phase. Orthopositronium diffusion coefficients are determined by fitting this lifetime density function to positron annihilation spectra obtained from 1 mol/dm3 solution of sodium dodecylsulphate (SDS) in D2O at different temperatures. The activation energy of the o-Ps diffusion in D2O obtained from an Arrhenius plot as Ea = 0.922 ± 0.103 eV indicates strong localization. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
