Composition of primary cosmic rays beyond the {open_quote}{open_quote}knee{close_quote}{close_quote} from emulsion chamber observations

Journal Article · Fri Nov 01 00:00:00 EST 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.5558· OSTI ID:388442

Costa, C G; Halzen, F ^[1]; Bellandi, J ^[2]; Salles, C ^[3]

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1. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
2. Instituto de Fisica Gleb Wataghin, UNICAMP, Campinas, Sao Paulo 13083-970 (Brazil)
3. Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706 (United States)

We show that the simplest assumptions for the dynamics of particle production allow us to understand the fluxes of hadrons and photons at mountain altitudes as well as the structure of individual events. The analysis requires a heavy nuclear component of primary cosmic rays above the {open_quote}{open_quote}knee{close_quote}{close_quote} in the spectrum with an average mass number {l_angle}{ital A}{r_angle}=7.3{plus_minus}0.9. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Univ. of Wisconsin, Madison, WI (United States)
• DOE Contract Number: FG02-95ER40896
• OSTI ID: 388442
• Journal Information: Physical Review, D, Vol. 54, Issue 9; Other Information: PBD: Nov 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
PRIMARY COSMIC RADIATION
PARTICLE PRODUCTION
HADRONS
PHOTONS
COSMIC RAY FLUX
HEAVY NUCLEI
MASS SPECTRA
EMULSIONS