The Production of the Exotic Atoms $\pi^+\pi^-$, $K^+\pi^-$ and $K^+K^-$
Estimates are made of the signals to be expected in the production of the exotic atoms Pionium ($\pi^+\pi^-$), Kaonium ($K^+K^-$) and also $K^+\pi^-$ in pp, pd and $e^+e^-$ reactions. Such experiments are now being undertaken or contemplated at CELSIUS, COSY, Indiana and SATURNE.