http://arxiv.org/abs/2212.03723
The total energy and other bound state properties of the ground (bound) $1^{1}S$-state in the Ps$^{-}$ ion are determined to very high accuracy. Our best variational energy for the ground state in this ion equals $E$ = -0.262005070232980107770402018838 $a.u.$ For this three-body ion we have evaluated (to very high accuracy) the rates of two-, three-, four- and five-photon annihilation. We also discuss some problems which currently exist in accurate computations of the rate of one-photon annihilation $\Gamma_{1 \gamma}$. Highly accurate computations of a number of singular and quasi-singular bound state properties in the Ps$^{-}$ ion are also performed and discussed. By investigating the sources of annihilation $\gamma-$quanta in the universe we have arrived to the conclusion about the high-temperature limit in optics. This can be formulated by the following statement: due to the electromagnetic instability of the vacuum, it is impossible to see (directly) any object heated to temperatures above 350 – 400 $keV$. In reality, instead of such an object an observer will see only an intense flow of annihilation $\gamma-$quanta, electrons and positrons. This phenomenon can be called the annihilation shielding of overheated matter and it is of great interest in Galactic astrophysics.
A. Frolov
Thu, 8 Dec 22
29/63
Comments: N/A