[en] The yield and average cross section for the reactions ¹¹B(p,n)¹¹C, ¹²C(p,γ)¹³N, ¹³C(p,n)¹³N, ¹²C(d,n)¹³N, ¹⁴N(p,α)¹¹C , ¹⁶O(p,α)¹³N, ¹⁶O(d,n)¹⁷F, ¹⁶O(t,n)¹⁸F, and ¹⁸O(p,n)¹⁸F have been measured in different compounds. The charged particles were created in the samples themselves either through recoil by scattering of 14 MeV neutrons of hydrogen and deuterium, or by the (n,t) reaction on ⁶Li using thermal neutrons. The yields of reactions ¹²C(d,n); ¹⁶O(p,α); ¹⁶O(t,n) and ¹⁸O(p,n) have been measured using proton deuteron and triton spectra generated by 14 MeV neutrons in the reactions D(n,p)2n; ⁶Li(n,d); ⁷Li(n,d) and ¹⁰B(n,d); ⁷Li(n,t) and ¹⁰B(n,t), respectively. On the other hand the hydrogen mass fraction in an arbitrary matrix is determined using the scattered protons emitted from a sample, to activate a boron pellet using the ¹¹B(p,n)¹¹C reaction. With a natural boron detector, detection limits of 0.2% have been achieved using a 14 MeV neutron generator with a yield of ∼10¹¹S^-1. 72 figs.; 17 tabs.; 105 refs. (author)