Cosmic Rays and the Sunspot Cycle: Primary α-Particle Intensity at Sunspot Maximum

  title={Cosmic Rays and the Sunspot Cycle: Primary $\alpha$-Particle Intensity at Sunspot Maximum},
  author={Phyllis S. Freier and Edward P. Ney and Peter Howard Fowler},
BS>In a series of balloon experiments, emulsion packages were included in each flight to allow the determination of the alpha -particle flux and energy spectrum at those times when total ionization or counting measurements showed that the total intensity had undergone a significant change. The decrease in the total intensity during the summer of 1957 was recorded in a number of flights in which satisfactory exposures were obtained. One flight made on May 
16 Citations

The variation with time of the flux and energy spectrum of primary cosmic ray alpha particles

Abstract The total flux and energy spectrum of primary cosmic-ray alpha particles at the top of the atmosphere have, been measured in emulsion stacks flown during September 1956 and June 1958. Values


Abstract Alpha-particles of the primary cosmic radiation have been studied in a stack of nuclear emulsions exposed over northern England on July 29, 1959. A flux of 167 ± 12 α-particles/m2 ster sec

Cosmic-ray knee in 1958

During the International Geophysical Year, two series of balloon flights were made. One of these sampled the ionization due to cosmic rays over the range of geomagnetic latitudes from 38°N to 87°N.

Cosmic Radiation and the Weather

  • E. Ney
  • Physics, Environmental Science
  • 1959
THE purpose of this communication is to point out the existence of a large tropospheric and stratospheric effect produced by the solar-cycle modulation of cosmic rays. Since there is some evidence

Geomagnetic Effects of Heavy Primary of Cosmic Radiation at Geomagnetic Latitude 24°N

The azimuthal distribution of heavy nuclei in primary cosmic radiation is measured by means of orientation-controlled nuclear emulsion stack exposed at geomagnetic latitude 24°N. Assuming that the

Primary cosmic-ray α-particles — I

SummaryThe primary cosmic-rayα-particle energy spectrum has been investigated, using photographic emulsions flown from Minneapolis on July 30th, 1957. The total flux observed was (151±9)particles/cm2

The Spectrum and Charge Composition of the Primary Cosmic Radiation

We shall try to present, in what follows, the current status (as of mid-1964) and some of the outstanding problems relating to the study of the primary cosmic radiation. This writing is made at a

On the derivation of cosmic ray specific yield functions

Abstract A series of revised Serential response curves and yield functions have been deduced for the nucleonic and ionizing components of the secondary cosmic radiation at various atmospheric depths,

Cosmic ray cut‐off rigidities and the earth's magnetic field

Abstract Approximate values of the vertical cut-off rigidities for cosmic ray particles in the earth's magnetic field have been deduced taking into account both the dipole and the non-dipole parts of



The low energy end of the cosmic ray spectrum of alpha-particles

Abstract An experiment has been carried out at Saskatoon, Canada, at a nominal geomagnetic latitude of 60.5°N, which shows the form of the low energy end of the cosmic ray alpha particle spectrum