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Two positrons can form a chemical bond in (PsH)2.

Authors :
Bressanini, Dario
Source :
Journal of Chemical Physics; 8/7/2021, Vol. 155 Issue 5, p1-5, 5p
Publication Year :
2021

Abstract

We show that two positrons can form a chemical bond between two otherwise repelling ions, similar to what happens to two hydrogen atoms forming a hydrogen molecule. Two positronium hydride atoms (PsH) can form the stable species (PsH)<subscript>2</subscript> when the two coupled positrons have opposite spins, while they form an antibonding state if they have the same spin. This is completely analogous to the landmark description by Heitler and London [Z. Phys. 44, 455 (1927)] on the formation of a chemical bond in the hydrogen molecule coupling two electrons with opposite spins. This is the first time two positrons are shown to behave like two electrons in ordinary matter, enlarging the definition of what is a chemical bond dating back to Lewis [J. Am. Chem. Soc. 38, 762 (1916)]. We suggest a few experimental routes to form and detect such a peculiar molecule. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00219606
Volume :
155
Issue :
5
Database :
Complementary Index
Journal :
Journal of Chemical Physics
Publication Type :
Academic Journal
Accession number :
151801278
Full Text :
https://doi.org/10.1063/5.0059721