Abstract
During the Polar Cap Absorption event occurring after the flares of 24th and 25th February 1969, three rockets have been launched successfully at Andenes (Norway).
Riometer and magnetometer recordings show that the P.CA. event is a fairly weak one.
In this paper the energy spectra of protons and α-particles in the energy range from 2.3 to 70 MeV, obtained during these flights are given. The main results are given in Figure 5. The a/proton ratio found, is 0.013 in the range 4–20 MeV/nucleon at both flights. The mean free path of the protons is estimated to be 0.06 AU.
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Reference
Van Gils, J. N., Van Beek, H. F., De Feiter, L. D., and Hendrickx, R. V.: 1969, Planetary Space Sci. 17, 255.
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© 1970 D. Reidel Publishing Company, Dordrecht - Holland
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Van Beek, H.F., Stevens, G.A. (1970). Rocket Observations of Protons and α-Particles at Andøya after the Solar Flares of 24th–25th February 1969. In: Manno, V., Page, D.E. (eds) Intercorrelated Satellite Observations Related to Solar Events. Astrophysics and Space Science Library, vol 19. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3278-0_40
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DOI: https://doi.org/10.1007/978-94-010-3278-0_40
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-3280-3
Online ISBN: 978-94-010-3278-0
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