Atomic spectral lines in helium containing a quark in the nucleus
The authors have used accurate theoretical values for the energies of low-lying states of the isoelectronic series of helium, together with 1Z-expansion theory, to compute to six-figure accuracy some of the spectral lines to be expected if a quark were to be embedded in the nucleus of a helium atom. These wavelengths may be of interest to searches for quark-He lines in laboratory or astrophysical spectra or for single-atom detection of such quark atoms. © 1979 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review A
Hylton, D., & Rau, A. (1979). Atomic spectral lines in helium containing a quark in the nucleus. Physical Review A, 19 (6), 2147-2150. https://doi.org/10.1103/PhysRevA.19.2147