Abstract
The variation of lateral shower age parameter with zenith angle for different shower size ranges is studied. The observed variation is in agreement with the electron-photon cascade theory and with the other EAS observations. It is found that up to zenith angle 30°, shower ‘age’ is practically independent of zenith angle. So it is difficult to correlate the reported high ‘age’ value of the excess showers from the direction of plausible point sources with zenith angle. The change in the value of shower age with atmospheric depth is studied and is found to be consistent with the prediction of cascade theory and simulation results. From the study of the variation of shower age with shower size for two different zenith angle intervals it is found that the shower age decreases with size but the rate of change of shower age decreases at higher sizes.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J N Stamenov,Proc. 20th Int. Conf. on Cosmic Rays, Moscow, Vol.8, 258 (1987)
J N Capdevielle and P Gabinski,J. Phys. G16, 769 (1990)
H Y Dai, Y D He and A X Huo,Proc. 21st Int. Conf. on Cosmic Rays, Adelaide, Vol.9, 5 (1990)
M Samorski and W Stamm,Ap. J. Lett. 268, L17 (1983)
R J Protheroe, R W Clay and P R Gerhardy,Ap. J. Lett. 280, L47 (1984)
J Fenyves,Techniques in UHE γ-ray astronomy, edited by R J Protheroe and S A Stephens (University of Adelaide, 1985) p. 124
A M Hillas,Proc. 20th Int. Conf. on Cosmic Rays, Moscow, Vol.2, p. 362 (1987)
T Cheung and P K Mackeown,Il. Nuovo Cimento C11, 193 (1988)
Yu A Fomin, N N Kalmykov, B A Khrenov, G B Khristiansen, G V Kulikov, V G Pogorely, A A Silaev, V I Solovyeva, V P Sulakov, A V Trubitsyn, V V Vashkevich and O V Vedeneev,Proc. 20th Int. Conf. on Cosmic Rays, Moscow, Vol.1, p. 397 (1987)
S C Tonwar, N V Gopalakrishnan, M R Rajeev and B V Sreekantan,Ap. J. Lett. 330, L107 (1988)
J N Capdevielle and J Gawin,J. Phys. G8, 1317 (1982)
A Bhadra, S K Sarkar, C Chakrabarty, B Ghosh and N Chaudhuri,Nucl. Instrum. Methods,A414, 233 (1998)
D K Basak, N Chakrabarty, B Ghosh, G C Goswami and N Chaudhuri,Nucl. Instrum. Methods 227, 167(1984)
K Greisen,Annu. Rev. Nucl. Sci. 10, 63 (1960)
J Linsley,J. Phys. G12, 51 (1986)
S K Sarkar, B Ghosh, N Mukherjee, R Chhetri, S Sanyal, D K Basak and N Chaudhuri,J. Phys. G17, 1279 (1991)
S Sanyal, B Ghosh, S K Sarkar, A Bhadra, A Mukherjee and N Chaudhuri,Aust. J. Phys. 46, 589 (1993)
B Bhattacharyya, A Bhadra, A Mukherjee, G Saha, S Sanyal, S Sarkar, B Ghosh and N Chaudhuri,Il. Nuovo Cimento,C18, 325 (1995)
S Miyake, N Ito, S Kawakami and Y Hayashi,Proc. 17th Int. Conf. on Cosmic Rays, Paris, Vol.11, p. 293(1981)
M F Bourdeau, J N Capdevielle and J Procureur,Proc. 16th Int. Conf. on Cosmic Rays, Kyoto, Vol.9, p. 138 (1979)
D F Liebing, R W Clay and P R Gerhardy,Proc. 18th Int. Conf. on Cosmic Rays, Bangalore, Vol.6, p. 7 (1983)
R W Clay, P R Gerhardy, D F Liebing, G J Thornton and J R Patterson,Il. Nuovo Cimento C4, 668 (1981)
R W Clay and P R Gerhardy,J. Phys. G7, L33 (1981)
S V Ter-Antonian, E A Mamijanian, I A Lulukian, G V Karagyozian, D A Mejlumian and A L Tovmassian,Proc. 24th Int. Conf. on Cosmic Rays, Roma, Vol.1, p. 365 (1995)
D W Idenden,Proc. 21st Int. Conf. on Cosmic Rays, Adelaide, Vol.9, p. 13 (1990)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bhadra, A. Shower age in correlation with zenith angle. Pramana - J Phys 52, 133–144 (1999). https://doi.org/10.1007/BF02831491
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02831491