Non-anti-matter Nature of the Tunguska Meteor

Details Non-anti-matter Nature of the Tunguska Meteor Non-anti-matter Nature of the Tunguska Meteor

Dec 1966

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966natur.212.1226m&link_type=abstract

Nature, Volume 212, Issue 5067, pp. 1226 (1966).

Physics

2

Scientific paper

THE deduction of Cowan et al.1, from their radiocarbon measurements of tree rings, that the Tunguska meteorite could not have been made of anti-matter has been called into question recently by R. V. Gentry2. The present communication supports the assumption of Cowan et al. that there are about 8 +/- 4 neutrons per nucleon-antinucleon annihilation and reaffirms the validity of their conclusion. Gentry has pointed out that for proton (P)-antiproton (Pmacr) annihilations which produce two low energy charged pions each on average, the pions decay before they can travel far enough in the atmosphere to interact; and that neutrons cannot therefore be produced to any important extent by Pmacr-P annihilations in the atmosphere.

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