The theoretical bases for establishing the existence of four-body molecules are discussed. A review of the theory of positronium molecules (Ps2) is presented. Special attention is given to the role of Ps2 in understanding the structure of similar quantum mechanical systems created in molecular crystals and semiconductors.

Fortschritte der Physik/Progress of PhysicsJan 1, 198812 citations

Formation of the Positronium Antihydride Molecules ($$\bar{\textrm{H}}\textrm{Ps}$$) in Low Energy, 5-Body Collisions of Antihydrogen Ion $$\bar{\textrm{H}}^+$$ with Positronium Atoms Ps

Piotr Froelich, Takuma Yamashita, Yasushi Kino +2 more

Few-Body SystemsAug 19, 20240 citations

The European Physical Journal D

Review of experimental and theoretical research on positronium ions and molecules

Mohsen Emami-Razavi, Jurij W. Darewych

Published Jun 1, 2021• 21 citations

Publisher

DOI: 10.1140/epjd/s10053-021-00187-4

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Formation of the Positronium Antihydride Molecules ( $\bar{\textrm{H}}\textrm{Ps}$ ) in Low Energy, 5-Body Collisions of Antihydrogen Ion $\bar{\textrm{H}}^+$ with Positronium Atoms PsFormation of the Positronium Antihydride Molecules ($$\bar{\textrm{H}}\textrm{Ps}$$) in Low Energy, 5-Body Collisions of Antihydrogen Ion $$\bar{\textrm{H}}^+$$ with Positronium Atoms Ps

Piotr Froelich, Takuma Yamashita, Yasushi Kino +2 more

Abstract In this paper we present the first pilot calculation of the elastic and inelastic cross sections for the 5-body scattering of antihydrogen ions with positronium atoms. These cross sections have not been calculated before and are not known experimentally. In particular, we focus on the collisional rearrangement reactions $\bar{{ \mathrm H}}^+ + \textrm{Ps} \rightarrow {\bar{\textrm{H}}}\textrm{Ps} +{\mathrm{e^+}}$ H ¯ + + Ps → H ¯ Ps + e + which deplete the $\bar{\textrm{H}}^+$ H ¯ + ions and result in stable atomcules $\bar{\textrm{H}}\textrm{Ps}$ H ¯ Ps . To better understand the mechanism of this rearrangement, we study the 3-dimensional, angle resolved positron densities of the 3- and 4-body fragments in the initial and final states of the rearrangement collision.Abstract In this paper we present the first pilot calculation of the elastic and inelastic cross sections for the 5-body scattering of antihydrogen ions with positronium atoms. These cross sections have not been calculated before and are not known experimentally. In particular, we focus on the collisional rearrangement reactions $$\bar{{ \mathrm H}}^+ + \textrm{Ps} \rightarrow {\bar{\textrm{H}}}\textrm{Ps} +{\mathrm{e^+}}$$ H ¯ + + Ps → H ¯ Ps + e + which deplete the $$\bar{\textrm{H}}^+$$ H ¯ + ions and result in stable atomcules $$\bar{\textrm{H}}\textrm{Ps}$$ H ¯ Ps . To better understand the mechanism of this rearrangement, we study the 3-dimensional, angle resolved positron densities of the 3- and 4-body fragments in the initial and final states of the rearrangement collision.

Few-Body SystemsAug 19, 20240 citations

Formation of the Positronium Antihydride Molecules (

\bar{\textrm{H}}\textrm{Ps}

) in Low Energy, 5-Body Collisions of Antihydrogen Ion

\bar{\textrm{H}}^+

with Positronium Atoms Ps

\bar{{ \mathrm H}}^+ + \textrm{Ps} \rightarrow {\bar{\textrm{H}}}\textrm{Ps} +{\mathrm{e^+}}

H ¯ + + Ps → H ¯ Ps + e + which deplete the

\bar{\textrm{H}}^+

H ¯ + ions and result in stable atomcules

\bar{\textrm{H}}\textrm{Ps}

H ¯ Ps . To better understand the mechanism of this rearrangement, we study the 3-dimensional, angle resolved positron densities of the 3- and 4-body fragments in the initial and final states of the rearrangement collision.