Energy spectra of secondary gamma rays at different atmospheric depths

The CERN Intersecting Storage Ring (ISR) data for p + p → π0 + X inclusive reaction have been used to derive the spectrum of secondary gamma rays at the top of the atmosphere. The measured primary nucleon spectrum of the Goddard Space Flight Group has been taken as a nucleon source spectrum. Using the cascade theory, the gamma ray spectra at the atmospheric depths 540, 650, and 735 g cm−2 have been calculated. The results are approximately in accord with the emulsion chamber data at Mt. Chacaltaya, Mt. Norikura, and Mt. Fuji in the spectral range 0.2–4 TeV.

Energy Dependence of the Dip in pp Elastic Scattering and the Pomeron Periphery

It is shown that, at ISR (intersecting storage ring) energies, the energy dependence of the dip in the differential cross section for pp elastic scattering can be explained by the dual absorptive model with a peripheral pomeron.

pp Elastic Scattering and the Pomeron Periphery

It is shown that, in pp elastic scattering at ISR (intersecting storage ring) energies, a dip at t ~ -1�3 (GeV/c)2 and a bump at t ~ -2'0 (GeV/c)2 in the differential cross section, as well as a break at t ~ -0,1 (GeV/c)2 in the slope parameter, can be explained by a peripheral pomeron.