Low-energy p, p¯, and d vertical intensities at mountain altitude

G. H. Sembroski; T. Bowen; E. W. Jenkins; J. J. Jones; A. E. Pifer

doi:10.1103/PhysRevD.33.639

Low-energy p, p¯, and d vertical intensities at mountain altitude

G. H. Sembroski, T. Bowen, E. W. Jenkins, J. J. Jones, and A. E. Pifer

Phys. Rev. D 33, 639 – Published 1 February 1986

Abstract

A cosmic-ray magnetic-particle spectrometer utilizing wire spark chambers and a superconducting magnet for momentum determination and scintillators for charge and velocity determination has been operated at an atmospheric depth of 747 g/ ${cm}^{2}$ . Twenty weeks of data were taken and the proton (p) energy spectrum in the momentum range of 0.6 to 2.4 GeV/c has been determined. Antiproton (p¯) events were observed and a p¯/p ratio of ${1.5}_{- 0.95}^{+ 1.85}$ at a momentum of 1.05 GeV/c was measured. Deuteron intensities and α-particle upper limits for this energy region are also presented.

Received 2 August 1985

DOI:https://doi.org/10.1103/PhysRevD.33.639

Authors & Affiliations

G. H. Sembroski, T. Bowen, E. W. Jenkins, J. J. Jones, and A. E. Pifer

Department of Physics, University of Arizona, Tucson, Arizona 85721

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Vol. 33, Iss. 3 — 1 February 1986

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