A New Reaction Rate of the 27Al(p,γ)28Si Reaction Based on Indirect Low-energy Cross-section Measurements

• DOI: 10.3847/1538-4357/adb7e4
• Publication Date: 2025-03-21T06:09:10Z
• Authors: M. La Cognata; S. Palmerini; F. Dell’Agli; P. Ventura; P. Adsley; R. Alba; S. Cherubini; M. Costa; A. Di Pietro; P. Figuera; G. L. Guardo; M. Gulino; F. Hammache; M. La Commara; L. Lamia; D. Lattuada; C. Maiolino; M. Mazzocco; A. Oliva; R. G. Pizzone; P. M. Prajapati; G. G. Rapisarda; S. Romano; D. Santonocito; M. L. Sergi; R. Spartá; A. Tumino
• Keywords: Reaction rate

Abstract The Mg–Al cycle is characteristic of the high-temperature ( T ∼ 0.055 GK) H-burning evolved stars and their nucleosynthesis. A proper comprehension this reaction network can help in solving debated questions such as occurrence anticorrelation abundances globular clusters. Recent high-resolution surveys have shown that an may hide existence multiple stellar populations relative Mg isotopes not be correlated with Al. Proton-induced reactions on 27 Al play a key role respect, particular interplay between p , α ) γ channels, determining closure (or not) cycle. Presently, situation still owing to large uncertainty affecting existing experimental nuclear data. recent indirect measurement indicates further reduction Al( 24 rate respect ones commonly adopted astrophysical models. In present work, we update Al(p, 28 Si based same results. case AGB experiencing hot bottom burning, revised would lead ∼35% increase abundance what presently foreseen, interesting consequences.