Early processes in positron and positronium chemistry: possible scavenging of epithermal e+ by nitrate ion in aqueous solutions

11th International Workshop on Positron and Positronium Chemistry

物理学;化学

Stepanov, Serge V.^1,2 ; Byakov, Vsevolod M.^2,3 ; Duplâtre, Gilles^4 ; Zvezhinskiy, Dmitrii S.^2 ; Stepanov, Petr S.^5 ; Zaluzhnyi, Alexandr G.^1,2

National Research Nuclear University, MEPhI (Moscow Engineering Physics Institute), Kashirskoe highway, 31, Moscow

115409, Russia^1

Institute of Theoretical and Experimental Physics, Moscow

117218, Russia^2

D.Mendeleyev University of Chemical Technology, Miusskaya sq., 9, Moscow

125047, Russia^3

Institut Pluridisciplinaire Hubert Curien, CNRS/IN2P3, BP 28, Strasbourg, Cedex 2

67037, France^4

Center for Photochemical Sciences, Bowling Green State University, Bowling Green

OH

43403, United States^5

关键词: Epithermal;    Nitrate ions;    Positron annihilation lifetimes;    Positronium formation;    Sub-picosecond;    Time-scales;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/618/1/012003/pdf
DOI  :  10.1088/1742-6596/618/1/012003

来源: IOP

【 摘 要 】

Positron ionization slowing down, formation of the positron track, reactions of e+with track species and its interaction with a scavenger on a subpicosecond timescale, including the process of the positronium formation process are discussed. Interpretation of the positron annihilation lifetime data on positronium formation in aqueous solutions of NO-3anions, known as efficient scavengers of the presolvated track electrons, suggests that these ions may also capture epithermal (presolvated) positrons as well.