Observations of the ratio of low-energy cosmic-ray positrons and electrons during solar quiet timesSimultaneous observations of the quiet-time interplanetary positron and electron spectra between 0.16 and 1.6 MeV are reported. The measurements were made in selected time intervals between October 1, 1972 and February 1, 1973 with the Caltech Electron/Isotope Spectrometer on the IMP-7 satellite. The detector system consists of a stack of 11 silicon surface-barrier detectors surrounded by a plastic scintillator anti-coincidence cup. The method of e+ identification and possible background effects are discussed and upper limits to the 0.16 to 1.6 MeV quiet-time positron flux are reported. During this period positrons amounted to less than 20% of the total 0.16 to 1.6 MeV electron flux.
Document ID
19740047427
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hurford, G. J.
Mewaldt, R. A.
Stone, E. C.
Vogt, R. E. (California Institute of Technology Pasadena, Calif., United States)