Indirect study of 19Ne states near the 18F+p threshold

Abstract

The early E < 511 keV gamma-ray emission from novae depends critically on the 18F(p,a)15O reaction. Unfortunately the reaction rate of the 18F(p,a)15O reaction is still largely uncertain due to the unknown strengths of low-lying proton resonances near the 18F+p threshold which play an important role in the nova temperature regime. We report here our last results concerning the study of the d(18F,p)19F(alpha)15N transfer reaction. We show in particular that these two low-lying resonances cannot be neglected. These results are then used to perform a careful study of the remaining uncertainties associated to the 18F(p,a)15O and 18F(p,g)19Ne reaction rates.

arXiv comment18 pages, 8 figures. Accepted in Nuclear Physics A

References in corpus (8)

• Gamma--ray emission from individual classical novae
• Gamma-ray emission from novae related to positron annihilation: constraints on its observability posed by new experimental nuclear data
• New Constraints on the 18F(p,alpha) 15O Rate in Novae from the (d,p) Reaction
• Particle decay branching ratios for states of astrophysical importance in 19Ne
• D(18F,pa)15N reaction applied to nova gamma-ray emission
• Hydrogen Burning of 17-O in Classical Novae
• Comparison of low--energy resonances in 15N(alpha,gamma)19F and 15O(alpha,gamma)19Ne and related uncertainties
• The 18F(p,a)15O reaction rate for application to nova gamma-ray emission

Cited by in corpus (5)

• Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
• Recent results in nuclear astrophysics
• Probing the single-particle character of rotational states in ${}^{19}$F using a short-lived isomeric beam
• Key ${}^{19}$Ne states identified affecting $\gamma$-ray emission from ${}^{18}$F in novae
• Transfer reactions as a Tool in Nuclear Astrophysics