A Hodoscope Study of Penetrating Cosmic-Ray Showers. I. Local Showers

Kurt Sitte

doi:10.1103/PhysRev.78.714

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A Hodoscope Study of Penetrating Cosmic-Ray Showers. I. Local Showers

Kurt Sitte

Physics Department, Syracus University, Syracuse, New York

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Phys. Rev. 78, 714 – Published 15 June, 1950

DOI: https://doi.org/10.1103/PhysRev.78.714

Abstract

Showers produced locally in a lead absorber were studied with a hodoscope arrangement. It is shown that, in order to record "local penetrating showers," a rigid selection demanding high penetrating power of the secondaries as well as of the primary must be used. If this is done, some of the discrepancies of recent investigations are removed. For showers capable of penetrating at least 200 g/ ${cm}^{2}$ Pb one finds a collision mean free path of (162±10) g/ ${cm}^{2}$ , and for showers of at least 100 g/ ${cm}^{2}$ penetration a mean free path of (196±13) g/ ${cm}^{2}$ . Besides, "local soft showers" due to electronic or photonic secondaries of ordinary $μ$ -mesons were studied. Their frequency at 3260-m elevation is about 1 in $10^{5}$ traversals of the lead absorber.

References (13)

J. Tinlot and B. Gregory, Phys. Rev. 75, 519 (1949)
G. Cocconi, Phys. Rev. 75, 1074 (1949)
W. B. Fretter, Phys. Rev. 76, 511 (1949)
G. Cocconi, Phys. Rev. 76, 984 (1949)
J. Tinlot and B. Gregory, Phys. Rev. 75, 520 (1949)
Hazen, Randall, and Tiffany, Phys. Rev. 75, 694 (1949)
D. Broadbent and L. Jánossy, Proc. Roy. Soc. (A) 190, 497 (1947)
B. Rossi, M.I.T. Technical Report No. 26 (April 4, 1949)
J. Tinlot, Phys. Rev. 73, 1476 (1948) ibid.74, 1197 (1949)
L. Jánossy and G. D. Rochester, Proc. Roy. Soc. (A) 182, 180 (1943)
W. D. Walker, Echo Lake Symposium on Cosmic Rays (1949)
V. Appapillai and A. W. Mailgavanam, Nature 162, 374 (1949)
W. Heitler and L. Jánossy, Proc. Phys. Soc. A62, 374 and 669 (1949)

[c1] J. Tinlot and B. Gregory, Phys. Rev. 75, 519 (1949)

[c2] G. Cocconi, Phys. Rev. 75, 1074 (1949)

[c3] W. B. Fretter, Phys. Rev. 76, 511 (1949)

[c4] G. Cocconi, Phys. Rev. 76, 984 (1949)

[c5] J. Tinlot and B. Gregory, Phys. Rev. 75, 520 (1949)

[c6] Hazen, Randall, and Tiffany, Phys. Rev. 75, 694 (1949)

[c7] D. Broadbent and L. Jánossy, Proc. Roy. Soc. (A) 190, 497 (1947)

[c8] B. Rossi, M.I.T. Technical Report No. 26 (April 4, 1949)

[c9] J. Tinlot, Phys. Rev. 73, 1476 (1948) ibid.74, 1197 (1949)

[c10] L. Jánossy and G. D. Rochester, Proc. Roy. Soc. (A) 182, 180 (1943)

[c11] W. D. Walker, Echo Lake Symposium on Cosmic Rays (1949)

[c12] V. Appapillai and A. W. Mailgavanam, Nature 162, 374 (1949)

[c13] W. Heitler and L. Jánossy, Proc. Phys. Soc. A62, 374 and 669 (1949)

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A Hodoscope Study of Penetrating Cosmic-Ray Showers. I. Local Showers

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A Hodoscope Study of Penetrating Cosmic-Ray Showers. II. Extensive Showers

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