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Measurements reveal a significant rise in N-13 production from natural carbon, indicating the crucial role of carbon-13 isotope.
Two recent measurements of the \(¹²C(p,γ )¹³N\) reaction on natural carbon were performed by detecting \(β ^+\) decay of the \(¹³N\) residue. It is argued that the measurements at energies above the \(¹³C(p,n)¹³N\) reaction threshold of 3.24 MeV proton kinetic energy can be interpreted as a consequence of 1.06% admixture of the \(¹³C\) isotope in natural carbon, as the cross section for \(¹³N\) production raised by 3 orders of magnitude with respect to the measurements of \(¹²C(p,γ )¹³N\) at lower energies. Abstract Published by the Jagiellonian University 2025 authors
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Matulewicz et al. (2025) studied this question.
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