Engineering topics
Publications and source records attributed to Wefel, J. P..
Several source spectra were constructed from combinations of 4- and s-process nuclei to match the observed charge spectrum of VVH particles. Their propagation was then followed, allowing for interactions and decay, and comparisons were made between the calculated near-earth spectra and those observed during high altitude balloon flights. None of the models gave good agreement with observations.
Large areas of nuclear emulsions and plastic detectors were exposed to the primary cosmic radiation during high altitude balloon flights. From the analysis of 141 particle tracks recorded during a total exposure of 1.3 x 10 to the 7th power sq m ster.sec., a charge spectrum of the VVH particles has been derived.
Primary cosmic ray particles with Z greater than 40 identified by tracks in balloon-borne nuclear emulsions and plastic detectors
Plastic track detectors calibration for heavy charged particles in cosmic ray experiments, considering track etching rates as function of particle charge and velocity
Spark discharge enhancement of heavy ion track etching in Lexan polycarbonate
Etchant type, concentration and temperature effect on various plastics track etching ratio and sensitivity
Trans-iron nuclei flux in primary cosmic radiation determined through high altitude balloon exposure of interleaved layers of nuclear photographic emulsion and plastic detectors