Abstract
From our recent observations of the charge and energy spectra of cosmic-ray nuclei we have constructed secondary-to-primary charge ratios at the two ends of the charge spectrum. These ratios are found to be inconsistent with thead hoc leaky-box model of cosmic-ray propagation which leads to an exponential pathlength distribution. Models for which the pathlength distribution function is deficient in short pathlengths provide a more consistent picture. Several of these models are investigated, bothad hoc and physical. The physical model considered here is one for which detailed galactic propagation parameters and boundary conditions are used and for which there exists no near sources of cosmic rays over a time interval corresponding to a few times the cosmic-ray age.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Cameron, A. G. W.: 1973,Space Sci. Rev. 15, 121.
Cowsik, R. and Wilson, L. W.: 1973, inProc. Thirteenth Intl. Cosmic Ray Conf., Denver 1, 500.
Cowsik, R. and Wilson, L. W.: 1975, inProc. Fourteenth Intl. Cosmic Ray Conf., Munich 2, 659.
Davis, L.: 1960,Proc. Moscow Cosmic Ray Conference 3, 220.
Elliot, H., Thambyalphillai, T., and Peacock, D. S.: 1970,Acta. Phys. Hung. 29, Suppl.1, 691.
Fontes, P., Meyer, J. P., and Perron, C.: 1977, inProc. Fifteenth Intl. Cosmic Ray Conf., Plovdiv 2, 234.
Garcia-Munoz, M., Mason, G. M., and Simpson, J. A.: 1977, inProc. Fifteenth Intl. Cosmic Ray Conf., Plovdiv 1, 224.
Greiner, D. E.: 1978, Invited Paper presented at the Durham Cosmic Ray Conference (unpublished).
Khazan, Y. M.: 1977, inProc. Fifteenth Intl. Cosmic Ray Conf., Plovdiv 2, 109.
Lezniak, J. A. and Webber, W. R.: 1978,Astrophys. J. 223, 676.
Lezniak, J. A.: 1979, submitted toAstrophys. Space Sci.
Lindstrom, P. J.: 1978, Private communication.
Lingenfelter, R. E.: 1969,Nature 224, 1182.
Ormes, J. F. and Freier, P.: 1978,Astrophys. J. 222, 471.
Owens, A. J.: 1974,Astrophys. J. 191, 235.
Owens, A. J.: 1976,Astrophys. Space Sci. 40, 357.
Perron, C.: 1976,Phys. Rev. C 14, 1108.
Peters, B.: 1952,Progr. Cosmic Ray Phys. 1, 191.
Renberg, P. U., Measday, D. F., Pepin, M., Schwaller, P., Favies, B., and Richard-Serre, C.: 1972,Nucl. Phys. A 183, 81.
Shapiro, M. M. and Silberberg, R.: 1970,Ann. Rev. Nucl. Sci. 20, 324.
Shapiro, M. M., Silberberg, R., and Tsao, C. H.: 1973, inProc. Thirteenth Intl. Cosmic Ray Conf., Denver 1, 578.
Silberberg, R., Tsao, C. H., and Shapiro, M. M.: 1976, in Shen and Merker (eds.),Spallation Nuclear Reactions and their Applications, D. Reidel Publ. Co., Dordrecht, Holland.
Silberberg, R. and Tsao, C. H.: 1977, inProc. Fifteenth Intl. Cosmic Ray Conf., Plovdiv 2, 84.
Syrovatskii, S. I.: 1959,Sov. Astron. 3, 22.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lezniak, J.A., Webber, W.R. Evidence for the deficiency of short cosmic ray pathlengths and a physically realistic explanation — The no-near-sources model. Astrophys Space Sci 63, 35–56 (1979). https://doi.org/10.1007/BF00647745
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00647745