A Modified activation method for reaction total cross section and yield measurements at low astrophysically relevant energies

The activation method is proposed for collection of the sufficient statistics during the investigation of the nuclear astrophysical reactions at low energies with the short-living residual nuclei formation. The main feature is a multiple cyclical irradiation of a target by an ion beam and measurement of the radioactivity decay curve. The method was tested by the yield measurement of the ¹²C(p,γ)¹³N reaction with detecting the annihilation γγ- coincidences from ¹³N(β⁺ν)¹³C decay at the two-arm scintillation spectrometer.