Ultra-sensitive in-beam gamma-ray spectroscopy for nuclear astrophysics at LUNA

Abstract

Ultra-sensitive in-beam gamma-ray spectroscopy studies for nuclear astrophysics are performed at the LUNA (Laboratory for Underground Nuclear Astrophysics) 400 kV accelerator, deep underground in Italy's Gran Sasso laboratory. By virtue of a specially constructed passive shield, the laboratory gamma-ray background for E_γ< 3 MeV at LUNA has been reduced to levels comparable to those experienced in dedicated offline underground gamma-counting setups. The gamma-ray background induced by an incident alpha-beam has been studied. The data are used to evaluate the feasibility of sensitive in-beam experiments at LUNA and, by extension, at similar proposed facilities.

arXiv commentaccepted, Eur. Phys. J. A

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• S-factor of 14N(p,gamma)15O at astrophysical energies
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• CN-Cycle Solar Neutrinos and Sun's Primordial Core Metalicity
• 3He(alpha,gamma)7Be cross section at low energies
• The 3He(alpha,gamma)7Be S-factor at solar energies: the prompt gamma experiment at LUNA
• Feasibility of low energy radiative capture experiments at the LUNA underground accelerator facility
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Cited by in corpus (24)

• LUNA: a Laboratory for Underground Nuclear Astrophysics
• LUNA: Nuclear Astrophysics Deep Underground
• LUNA: Status and Prospects
• The 14N(p,gamma)15O reaction studied with a composite germanium detector
• Direct measurement of the 15N(p,gamma)16O total cross section at novae energies
• A new study of the ${}^{22}$Ne(p,$\gamma$)${}^{23}$Na reaction deep underground: Feasibility, setup, and first observation of the 186 keV resonance
• Revision of the 15N(p,γ)16O reaction rate and oxygen abundance in H-burning zones
• An actively vetoed Clover gamma-detector for nuclear astrophysics at LUNA
• Underground nuclear astrophysics: why and how
• Neutron-induced background by an alpha-beam incident on a deuterium gas target and its implications for the study of the 2H(alpha,gamma)6Li reaction at LUNA
• Thermonuclear processes of the Universe
• Background in $\gamma$-ray detectors and carbon beam tests in the Felsenkeller shallow-underground accelerator laboratory
• The study of key reactions shaping the post main-sequence evolution of massive stars in underground facilities
• A proposed direct measurement of cross section at Gamow window for key reaction ${}^{19}$F($p$,$\alpha$)${}^{16}$O in Asymptotic Giant Branch stars with a planned accelerator in CJPL
• New Theoretical Results for Radiative 3H(p, γ)4He, 3He(2H, γ)5Li, 4He(2H, γ)6Li, 4He(3H, γ)7Li, and 4He(3He, γ)7Be Captures At Astrophysical Energies
• Exploratory investigation of the HIPPO gas-jet target fluid dynamic properties
• First direct measurement of the 64.5 keV resonance strength in ${}^{17}$O(p,$\gamma$)${}^{18}$F reaction
• Experimental determination of the ${}^3$He($\alpha$,$\gamma$)${}^7$Be reaction cross section above the ${}^7$Be proton separation threshold
• A new study of ${}^{25}$Mg($\alpha$,n)${}^{28}$Si angular distributions at $E_{\alpha }$ = 3 - 5 MeV
• Energy Acceptance of the St. George Recoil Separator
• A facility for direct measurements for nuclear astrophysics at IFIN-HH -- a 3 MV tandem accelerator and an ultra-low background laboratory
• New results for the astrophysical S-factor and reaction rate of radiative 3He4He capture
• Progress of the Felsenkeller shallow-underground accelerator for nuclear astrophysics
• Study of the ${}^{20}$Ne($p,\gamma$)${}^{21}$Na reaction at LUNA