Improvement of Calculations of Cross Sections and Cosmic-Ray Propagation

  • R. Silberberg
  • C. H. Tsao
  • John R. Letaw
Chapter
Part of the NATO ASI Series book series (ASIC, volume 107)

Abstract

The cosmic-ray experiments on the HEAO-3 satellite provide unprecedented data, both in terms of the number of events and in elemental resolution. The two experiments together have yielded measurements all the way from lithium to uranium. Our partial cross section calculations have a standard deviation of ~ 30 per cent; higher precision is desirable now for the analysis of the high-quality experimental results on relative abundances and energy spectra of elements. We have collected data on cross section measurements of the last five years, in order to explore the existence of systematic deviations in our equations and parameters for calculating cross sections. During the first phase of this work, we have emphasized the development of an empirical formula for total inelastic cross sections. The results of this investigation (both on total and partial inelastic cross sections) will be presented, and the effects on the calculation of cosmic-ray abundances will be discussed. In particular, the discrepancy between earlier propagation calculations and measurements of the secondary/primary ratio (6l ≤ Z ≤ 75)/(76 ≤ Z ≤ 83) is appreciably reduced.

Keywords

Inelastic Cross Section Partial Cross Section Calculated Cross Section Cross Section Calculation Fission Cross Section 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bellettini, G., Cocconi, G., Diddens, A.N., Lillethun, E., Mattiae, G., Scanlon, J.P., and Wetherell, A.M.: 1966, Nucl. Phys.,79, pp. 609–62U.CrossRefGoogle Scholar
  2. Bobchenko, B.M., et al.: 1979, Sov. J. Nucl. Phys.,30, pp. 805–813.Google Scholar
  3. Dostrovsky, I., Rabinowitz, P. and Bivins, R.: 1958,Phys. Rev.,111, 1659–1676.ADSCrossRefGoogle Scholar
  4. Dwyer, R.D., Garcia-Munoz, M., Guzik, T.G., Meyer, P., Simpson, J.A. and Wefel, J.P.: 1981, 17th Internat. Cosmic Ray Conf. (Paris),9, pp. 222–225.Google Scholar
  5. Gorin, Yu.P., Denisov, S.P., Donskov, S.V., Krasnokutskii, R.N., Petrukhin, A.I., Prokoshkin, Yu.D. and Stoyanova, D.A.: 1979, Sov. J. Nucl. Phys., 18, pp. 173–178.Google Scholar
  6. Karol, P.J.: 1975, Phys. Rev.,Cll, pp. 1203–1209.Google Scholar
  7. Kaufman, S.B. and Steinberg, E.P.: 1980,Phys. Rev. C22, pp. 167–178.ADSGoogle Scholar
  8. Let aw, J., Silberberg, R. and Tsao, C.H.: 1982, submitted to Ap. J. Suppl.Google Scholar
  9. Lindstrom, P.J., Greiner, D.R., Heckman, H.H., Cork, B. and Bieser, F.S.: 1975, Lawrence Berkeley Laboratory Report LBL-3650.Google Scholar
  10. Metropolis, N., Bivins, R., Storm, M., Turkevich, A., Miller, J.M. and Friedlander, G.: 1958,Phys. Rev. 110, pp. 185 – 203.MathSciNetADSCrossRefGoogle Scholar
  11. Mewaldt, R.A., Spalding, J.D., Stone, E.C. and Vogt, R.E.: 1981, 17th Internat. Cosmic Ray Conf. (Paris),2, pp. 68–71.Google Scholar
  12. Perron, C.: 1976,Phys. Rev. C14, pp. 1108 - 1120.Google Scholar
  13. Perron, C. and Koch-Miramond, L.: 1981, 17th Internat. Cosmic Ray Conf. ( Paris ),2, 27–30.Google Scholar
  14. Raisbeck, G.M., Lestringuez, J., Salaun, S., Vlieks, A, Bourles, D. and Yiou, F.: 1979, l6th Internat. Cosmic Ray Conf., (Kyoto)2, pp. 207–211.Google Scholar
  15. Regnier, S., Lagarde, M., Simonoff, G.N. and Yokoyama, Y.: 1973,Earth Planetary Science Letters, 18, 9 – 12.ADSCrossRefGoogle Scholar
  16. Renberg, P.U., Measday, D.F., Pepin, M., Schwaller, P., Favier, B. and Richard-Serre, C.: 1972, Nucl. Phys.Al83, pp. 8l–100.Google Scholar
  17. Rudstam, G.: 1966,Z. f. Naturforschung 21A, pp. 1027–1031.ADSGoogle Scholar
  18. Schimmerling, W., Devlin, T.J., Johnson, W.W., Vosburg, K.G., and Mischke, R.E.: 1973,Phys. Rev., C7, pp. 258 - 262.Google Scholar
  19. Silberberg, R. and Tsao, C.H.: 1973a,Ap. J. Suppl. 25, 315–333, denoted ST-a in this paper.Google Scholar
  20. Silberberg, R. and Tsao, C.H.: 1973b,Ap. J. Suppl. 25, 335–367, denoted ST-b in this paper.Google Scholar
  21. Tsao, C.H. and Silberberg, R.: 1979, l6th Internat. Cosmic Ray Conf. (Kyoto),2, pp. 202–205.Google Scholar
  22. Webber, W.R. and Brautigam, D.A.: 1982, to be publ. in Ap. J.Google Scholar
  23. Westfall, G.D., Wilson, L.W., Lindstrom, P.J., Crawford, H.J., Greiner, D.E. and Heckman, H.H.: 1979,Phys. Rev. C19, pp. 1309–1323.ADSGoogle Scholar
  24. Westmeier, W..: 1980, Thesis, Phillips University, Marburg/Lahn, Germany.Google Scholar

Copyright information

© D. Reidel Publishing Company 1983

Authors and Affiliations

  • R. Silberberg
    • 1
  • C. H. Tsao
    • 1
  • John R. Letaw
    • 2
    • 3
  1. 1.Naval Research LaboratoryUSA
  2. 2.Advanced Research CorporationColumbiaUSA
  3. 3.Naval Research LaboratoryUSA

Personalised recommendations