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On the flux of neutrons from flares

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Abstract

Under the assumption that white-light flares are caused by energetic particles penetrating into the photosphere (Švestka, 1970a; Najita and Orrall, 1970) the known number of protons needed for the white-light emission is used to obtain an estimate of the production of neutrons occurring at the same time. In the case of the white-light flare of 23 May, 1967, the peak flux of neutrons at the Earth distance had to exceed 3 neutrons/cm2s, thus being detectable in space. This maximum neutron flux reached the Earth as early as the time of the maximum phase of the flare in the Hα light. However, reasonable estimates show that flares associated with a detectable neutron flux should be fairly rare phenomena, maybe as rare as the white-light flares.

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References

  • De Feiter, L. D.: 1971, private communication.

  • De Mastus, H. L. and Stover, R. R.: 1967, Publ. Astron. Soc. Pacific 79, 615.

    Google Scholar 

  • Kazachevskaya, T. V. and Severny, A. B.: 1958, Izv. Krymsk. Astrofiz. Obs. 20, 80.

    Google Scholar 

  • Lanzerotti, L. J.: 1969, Report UAG-5, World Data Center A, p. 56.

  • Lingenfelter, R. E.: 1969, Solar Phys. 8, 341.

    Google Scholar 

  • Lingenfelter, R. E. and Ramaty, R.: 1967, High Energy Nuclear Reactions in Astrophysics, W. A. Benjamin, New York, p. 99.

    Google Scholar 

  • Lingenfelter, R. E., Flamm, E. J., Canfield, E. H., and Kellman, S.: 1965, J. Geophys. Res. 70, 4087.

    Google Scholar 

  • Machado, M.: 1971, Solar Phys. 17, 389.

    Google Scholar 

  • Najita, K. and Orrall, F. Q.: 1970, Solar Phys. 15, 176.

    Google Scholar 

  • Švestka, Z.: 1965, Adv. Astron. Astrophys. 3, 119 (p. 149).

    Google Scholar 

  • Švestka, Z.: 1970a, Solar Phys. 13, 471.

    Google Scholar 

  • Švestka, Z.: 1970b, paper presented at the Symposium on Solar-Terrestrial Physics, Leningrad 1970.

  • Švestka, Z. and Simon, P.: 1969, Solar Phys. 10, 3.

    Google Scholar 

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Authors and Affiliations

  1. Space Science Department, ESTEC, Noordwijk, The Netherlands

    Z. Švestka

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  1. Z. Švestka
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On leave from the Astronomical Institute of the Czechoslovak Academy of Sciences, Ondřejov.

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Švestka, Z. On the flux of neutrons from flares. Sol Phys 19, 202–206 (1971). https://doi.org/10.1007/BF00148834

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  • DOI: https://doi.org/10.1007/BF00148834

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