Solar protons and α particles from the September 3, 1960, flares

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Journal of Geophysical Research

DOI:https://doi.org/10.1029/JZ067i001p00013· OSTI ID:4818788

Biswas, S.; Freier, P. S.; Stein, W.

Solar proton differential energy spectra were measured in emulsions during four flights in the 48-hour interval following the class 3+ solar flare at 0ll0 UT on September 3, 1960. During these times the spectra were expressed as dN/dE = const E/sup -3/where the constant is a decreasing function of time. The cutoff energy iniposed by the earth's magnetic field at Minneapolis, Minnesota, was not sharp even before the sudden commencement of the magnetic storm. During the magnetic storm the cutoff energy is lowered. Solar alpha particles were observed with an abundance of 3 to 7% of the solar protons of the same rigidity. This abundance ratio was 3% before the magnetic storms and became higher during the storm period.

• Research Organization: Univ. of Minnesota, Minneapolis
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-008083
• OSTI ID: 4818788
• Journal Information: Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: 1 Vol. 67; ISSN 0148-0227
• Publisher: American Geophysical Union
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA PARTICLES
ANGULAR DISTRIBUTION
BORON 10
BORON 11
CALCIUM 40
CALCIUM 41
COSMIC RADIATION
DETECTION
DEUTERON BEAMS
DISTRIBUTION
EARTH
ENERGY
ENERGY RANGE
GEOMAGNETIC CUT-OFF RIGIDITY
MAGNETIC FIELDS
MEASURED VALUES
MINNESOTA
MOMENTUM
MONOCRYSTALS
NUCLEAR EMULSIONS
NUCLEAR REACTIONS
NUCLEAR THEORY
PARTICLE TRACKS
PHYSICS
POLARIZATION
PRODUCTION
PROTONS
QUANTITY RATIO
RADIATION DETECTORS
SCINTILLATION COUNTERS
SODIUM IODIDES
SOLAR FLARES
SUN
TARGETS
TURBULENCE