1208.4121 (Alexei M. Frolov)

Hyperfine structure splitting of the positron-helium ions
$e^{+}[$He$(2^3S)]$    [PDF]

Alexei M. Frolov

The hyperfine structure splittings are determined for the lowest bound state in the positron-helium ion $e^{+}[$He$(2^3S)]$. The expectation values of all interparticle delta-functions used in our calculations have been determined in recent highly accurate computations. The hyperfine structure of the positron-helium ion $e^{+}$[He$(2^3S)]$ has been investigated in details. In particular, for the $e^{+}[{}^3$He$(2^3S)]$ ion one can observe the three following hyperfine structure splittinings: 5824.3986 $MHz$, 7646.6531 $MHz$ and 5824.4019 $MHz$. All these values can be measured in modern experiments. In the $e^{+}[{}^4$He$(2^3S)]$ ion the only one hyperfine structure splitting 55308.6951 $MHz$ can be observed.

View original: http://arxiv.org/abs/1208.4121