A measurement of cosmic-ray positron and negatron spectra between 50 and 800 MV

Details A measurement of cosmic-ray positron and negatron spectra between 50 and 800 MV A measurement of cosmic-ray positron and negatron spectra between 50 and 800 MV

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...198..493d&link_type=abstract

Astrophysical Journal, vol. 198, June 1, 1975, pt. 1, p. 493-505.

Computer Science

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52

Balloon-Borne Instruments, Cosmic Rays, Magnetic Spectroscopy, Negatrons, Positrons, Abundance, Balloon Sounding, Cerenkov Counters, Energy Spectra, Interstellar Radiation, Spark Chambers

Scientific paper

A balloon-borne spark chamber magnetic spectrometer has been used to measure the spectra of cosmic-ray positrons and negatrons at energies between 50 and 800 MV. The data reported here were obtained during two flights from Fort Churchill, Manitoba, in July 1972. The present results indicate that the dominance of negatrons from primary sources, found in earlier experiments above 200 MV, extends down to at least 50 MV. Solar modulation of the positron component is found to be consistent with that of the total electron spectrum, assuming that the positron component is entirely attributable to collisions between cosmic-ray nuclei and the interstellar gas.

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