  The recent real time KARMEN anomaly for the electron neutrino counting rates
(obtained from stopped muon decays) is analyzed by employing a neutrino flavor
rotation model in which the muon neutrino is in a superposition of only two
mass eigenstates. On the basis of experimental electron neutrino counting
oscillations, we find a neutrino mass splitting $|m_2^2-m_1^2|=(0.22\pm
0.02)(eV/c^2)^2$ and a flavor rotation angle $\phi =0.34\pm 0.10$, both within
a 95% confidence interval.
