Breakout from the hot CNO cycle: The 18F(p,γ) vs 18F(p,α) branching ratio

We have studied the properties of low-lying 18F+p resonances as excited states in 19Ne. Three new levels have been found in the range 0<~Ec.m.<~1 MeV just above the 18F+p threshold, and partial decay widths and isospin-mirror connections are suggested to known states in 19F for each of the nine states in this energy range. The properties of these resonances have been used to calculate the reaction rate NA〈σv〉 for the 18F(p,γ)19Ne and 18F(p,α)15O reactions in the temperature range 108