查看文章

THE importance of determining the abundance of antiparticles in the primary cosmic rays has already been discussed¹: for example, Steigman has considered the value of p̄ as a probe in distinguishing various propagation models. We report here on the measurement of p̄/p and H̄e/He in the 4–100 GeV/c range made from a balloon flight in May 1976 of a superconducting magnet spectrometer from Palestine, Texas, under 5,8 g cm⁻² of residual atmosphere. The upper limits derived are the most stringent to date.