  We demonstrate a combination of an isotopically purified atom beam and a
magneto-optical trap which enables the single atom detection of all stable
isotopes of calcium (40, 42, 43, 44, 46 and 48). These isotopes range in
abundance from 96.9 % (40Ca) to 0.004 (46Ca). The trap is loaded from an atomic
beam which is decelerated in a Zeeman slower and subsequently deflected over an
angle of 30 degrees by optical molasses. The isotope selectivity of the Zeeman
slower and the deflection stage is investigated experimentally and compared
with Monte Carlo simulations.
