The Observation of Muons in Extensive Air Shower

Abstract

The observation of muons in EAS relevant to the age parameter which has been determined from a lateral density distribution of electrons has been carried out by means of a neon hodoscope array at Mt. Norikura (2770m.a.s.l.). As a result, it was found that there is a strong correlation between lateral distributions of electrons and of muons. The lateral distribution of muons as a power function of the distance r from the core axis has the exponent which varies from -0.8 to -1.7 with the change of age parameter of EAS. The empirical distribution function of muons with various age parameter can be expressed as; Δ µ( r , N e , s )= f ( s ) r - g ( s ) e -( r /250) ( N e /10 6 ) 0.8 w h e r e f(s)=3×10^4exp (-7.26s) a n d g(s)=8.0exp (-2.0s). A n o t h e r c o n c l u s i o n i s t h a t t h e c a u s e o f t h e e x i s t e n c e o f m u l t i c o r e E A S w i l l n o t b e d u e t o t h e h e a v y n u c l e i i n t h e p r i m a r y c o s m i c r a y s b u t d u e t o a h i g h e n e r g y i n t e r a c t ...