Publications (14)
Three new low-energy resonances in the Ne(p,)Na reaction
F. Cavanna, R. Depalo, M. Aliotta +31
The Ne(p,)Na reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle affects the synthesis of the elements between Ne and Al in…
Effect of beam energy straggling on resonant yield in thin gas targets: The cases Ne(p,γ)Na and N(p,γ)O
D. Bemmerer, F. Cavanna, R. Depalo +25
When deriving resonance strengths using the thick-target yield approximation, for very narrow resonances it may be necessary to take beam energy straggling into account. This appli…
A new approach to monitor 13C-targets degradation in situ for 13C(alpha,n)16O cross-section measurements at LUNA
G. F. Ciani, L. Csedreki, J. Balibrea-Correa +46
Direct measurements of reaction cross-sections at astrophysical energies often require the use of solid targets able to withstand high ion beam currents for extended periods of tim…
Direct capture cross section and the = 71 and 105 keV resonances in the Ne()Na reaction
F. Ferraro, M. P. Takács, D. Piatti +41
The Ne()Na reaction, part of the neon-sodium cycle of hydrogen burning, may explain the observed anticorrelation between sodium and oxygen abundances in globula…
A high-efficiency gas target setup for underground experiments, and redetermination of the branching ratio of the 189.5 keV resonance
F. Ferraro, M. P. Takács, D. Piatti +42
The experimental study of nuclear reactions of astrophysical interest is greatly facilitated by a low-background, high-luminosity setup. The Laboratory for Underground Nuclear Astr…
Origin of meteoritic stardust unveiled by a revised proton-capture rate of O
M. Lugaro, A. I. Karakas, C. G. Bruno +34
Stardust grains recovered from meteorites provide high-precision snapshots of the isotopic composition of the stellar environment in which they formed. Attributing their origin to…
First direct limit on the 334 keV resonance strength in the Ne(α,γ)Mg reaction
D. Piatti, E. Masha, M. Aliotta +44
In stars, the fusion of Ne and He may produce either Mg, with the emission of a neutron, or Mg and a ray. At high temperature, the () channel do…
Setup commissioning for an improved measurement of the D(p,gamma)3He cross section at Big Bang Nucleosynthesis energies
V. Mossa, K. Stöckel, F. Cavanna +44
Among the reactions involved in the production and destruction of deuterium during Big Bang Nucleosynthesis, the deuterium-burning D(p,gamma)3He reaction has the largest uncertaint…
Direct measurement of the 13C(α,n)16O cross section into the s-process Gamow peak
G. F. Ciani, L. Csedreki, D. Rapagnani +45
One of the main neutron sources for the astrophysical s-process is the reaction 13C(α,n)16O, taking place in thermally pulsing Asymptotic Giant Branch stars at temperatures around…
Ne and Na ejecta from intermediate-mass stars: The impact of the new LUNA rate for Ne(p,)Na
A. Slemer, P. Marigo, D. Piatti +36
We investigate the impact of the new LUNA rate for the nuclear reaction NeNa on the chemical ejecta of intermediate-mass stars, with particular focus on the the…
Improved Direct Measurement of the 64.5 keV Resonance Strength in the 17O(p,a)14N Reaction at LUNA
C. G. Bruno, D. A. Scott, M. Aliotta +32
The O(p,)N reaction plays a key role in various astrophysical scenarios, from asymptotic giant branch stars to classical novae. It affects the synthesis of rare i…
Characterization of the LUNA neutron detector array for the measurement of the 13C(a,n)16O reaction
L. Csedreki, G. F. Ciani, J. Balibrea-Correa +46
We introduce the LUNA neutron detector array developed for the investigation of the 13C(a,n)16O reaction towards its astrophysical s-process Gamow peak in the low-background enviro…
The impact of the revised ON reaction rate on O stellar abundances and yields
O. Straniero, C. G. Bruno, M. Aliotta +33
Context. Material processed by the CNO cycle in stellar interiors is enriched in 17O. When mixing processes from the stellar surface reach these layers, as occurs when stars become…
Direct measurement of low-energy Ne(p,)Na resonances
R. Depalo, F. Cavanna, M. Aliotta +30
The Ne(p,)Na reaction is the most uncertain process in the neon-sodium cycle of hydrogen burning. At temperatures relevant for nucleosynthesis in asymptotic giant…