New constraints from Haverah Park data on the photon and iron fluxes of ultrahigh-energy cosmic rays

Using data from inclined events (60 degrees < theta < 80 degrees) recorded by the Haverah Park shower detector, we show that above 10(19) eV less than 41% (54%) of the primary cosmic rays can be photons (iron nuclei) at the 95% confidence level. Above 4 x 10(19) eV less than 65% of the cosmic rays can be photonic at the same confidence level. These limits place important constraints on some models of the origin of ultrahigh-energy cosmic rays. Details of two new events above 10(20) eV are reported.