Delayed particles in EAS at Akeno

Details Delayed particles in EAS at Akeno Delayed particles in EAS at Akeno

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....8..279s&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 8 p 279-282 (SEE N85-36066 24-93)

Physics

Cosmic Ray Showers, Nuclear Interactions, Scintillation Counters, Concretes, Distribution (Property), Lead (Metal), Observatories, Time Lag

Scientific paper

Using two 2.25 square meter fast scintillation detectors, delayed particles in cosmic ray showers (CRS) have been observed at Akeno Observatory. These are set under 1 m concrete and 2.5 cm lead plates respectively. About 2500 CRS are analyzed. The lateral distribution of delayed particles for the CRS size 10 to the 7th power is flatter than that for to the 7th power. The lateral density of delayed particles is almost constant for the size range 2.2 X 10 to the 5th power approx. 10 to the 7th power and increases rapidly above 10 to the 7th power. These facts may suggest change of nuclear interaction at 10 to the 7th power and substantially the existence of heavy particles with long life.

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