Search for resonant Bhabha scattering around an invariant mass of 1.8 MeV

A search was made for resonant Bhabha scattering of positrons on atomic electrons using two Mini-Orange spectrometers and relatively thick targets of low Z. No resonances were found within (trre~ F) limits of -~20 to 40 barn eV for lifetimes in the 10- ~o_ 10- ~ 2 s range of an intermediate particle propagating freely in the target material