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Cross sections relevant to gamma-ray line emission in solar flares: $^3$He-induced reactions on $^{16}$O nuclei

V. Tatischeff·J. Duprat·J. Kiener·M. Assuncao·A. Coc·C. Engrand·M. Gounelle·A. Lefebvre·M. -G. Porquet·N. De Sereville·J. -P. Thibaud·C. Bourgeois·M. Chabot·F. Hammache·J. -A. Scarpaci
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Abstract

Gamma-ray production cross sections have been measured for gamma-ray lines copiously emitted in the $^3$He bombardment of $^{16}$O nuclei: the 937, 1042 and 1081 keV lines of $^{18}$F and the 1887 keV line of $^{18}$Ne. Four Ge detectors with BGO shielding for Compton suppression were used to measure the angular distributions of the gamma-rays. The excitation functions have been obtained for $^3$He bombarding energies from 3.7 to 36 MeV. Total cross sections are tabulated for calculations relevant to gamma-ray astronomy. The importance of these lines as diagnosis for the presence and properties of accelerated $^3$He in solar flares is discussed in light of the measured cross sections.

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V. Tatischeff, J. Duprat, J. Kiener, M. Assuncao, A. Coc, C. Engrand, M. Gounelle, A. Lefebvre, M. -G. Porquet, N. De Sereville, J. -P. Thibaud, C. Bourgeois, M. Chabot, F. Hammache, J. -A. Scarpaci. 2003-08-25. Cross sections relevant to gamma-ray line emission in solar flares: $^3$He-induced reactions on $^{16}$O nuclei. https://doi.org/10.1103/physrevc.68.025804

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