
%0 Journal Article
%A McCusker, CBA 
%T An Estimate of the Flux of Free Quarks in High Energy Cosmic Radiation
%J Australian Journal of Physics
%D 1983/10/01
%V 36
%N 5
%P 717-724
%K 
%R https://doi.org/10.1071/PH830717
%U https://www.publish.csiro.au/paper/PH830717 
%X The flux of quarks in air shower cores at sea level is estimated from four different types of experiments. All four estimates agree and yield a quark flux of 8 x 10-12 cm-2 s- 1 sr- 1 ? The calculated concentration of quarks in the Earth's crust resulting from this flux is compared with that found in niobium in the Stanford quark search. 
