3He(alpha,gamma)7Be cross section at low energies

Abstract

The flux of 7Be and 8B neutrinos from the Sun and the production of 7Li via primordial nucleosynthesis depend on the rate of the 3He(alpha,gamma)7Be reaction. In extension of a previous study showing cross section data at 127 - 167 keV center of mass energy, the present work reports on a measurement of the 3He(alpha,gamma)7Be cross section at 106 keV performed at Italy's Gran Sasso underground laboratory by the activation method. This energy is closer to the solar Gamow energy than ever reached before. The result is sigma = 0.567 +- 0.029(stat) +- 0.016(syst) nbarn. The data are compared with previous activation studies at high energy, and a recommended S(0) value for all 3He(alpha,gamma)7Be activation studies, including the present work, is given.

Accepted for publication in PRC

References in corpus (22)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• New solar opacities, abundances, helioseismology, and neutrino fluxes
• Solar Fusion Cross Sections
• Electron Energy Spectra, Fluxes, and Day-Night Asymmetries of ${}^8$B Solar Neutrinos from the 391-Day Salt Phase SNO Data Set
• Solar neutrino measurements in Super-Kamiokande-I
• Updated Big Bang Nucleosynthesis confronted to WMAP observations and to the Abundance of Light Elements
• What do we (not) know theoretically about solar neutrino fluxes?
• A probable stellar solution to the cosmological lithium discrepancy
• Primordial Lithium and Big Bang Nucleosynthesis
• Compilation and R-matrix analysis of Big Bang nuclear reaction rates
• Nuclear Reaction Network for Primordial Nucleosynthesis: a detailed analysis of rates, uncertainties and light nuclei yields
• S-factor of 14N(p,gamma)15O at astrophysical energies
• Sharpening the predictions of big-bang nucleosynthesis
• First Measurement of the He3+He3-->He4+2p Cross Section down to the Lower Edge of the Solar Gamow Peak
• Activation measurement of the 3He(alpha,gamma)7Be cross section at low energy
• A New Precision Measurement of the 3He(4He,gamma)7Be Cross section
• The lithium content of the globular cluster NGC 6397
• First measurement of the 14N(p,gamma)15O cross section down to 70 keV
• An Algorithm for Computing Screened Coulomb Scattering in Geant4
• Feasibility of low energy radiative capture experiments at the LUNA underground accelerator facility
• Study of the He3(He4,gamma)Be7 and H3(He4,gamma)Li7 reactions in an extended two-cluster model
• Modern theories of low-energy astrophysical reactions

Cited by in corpus (39)

• Big Bang Nucleosynthesis: 2015
• Solar fusion cross sections II: the pp chain and CNO cycles
• NACRE II: an update of the NACRE compilation of charged-particle-induced thermonuclear reaction rates for nuclei with mass number $A<16$
• A Bitter Pill: The Primordial Lithium Problem Worsens
• Solar models with accretion. I. Application to the solar abundance problem
• Big Bang Nucleosynthesis and Particle Dark Matter
• Astrophysical S-factor of the 3He(alpha,gamma)7Be reaction measured at low energy via prompt and delayed gamma detection
• LUNA: a Laboratory for Underground Nuclear Astrophysics
• LUNA: Nuclear Astrophysics Deep Underground
• The 3He + 4He --> 7Be Astrophysical S-factor
• Evaluation of Modern 3He(alpha,gamma)7Be Data
• LUNA: Status and Prospects
• The 3He(alpha,gamma)7Be S-factor at solar energies: the prompt gamma experiment at LUNA
• Ultra-sensitive in-beam gamma-ray spectroscopy for nuclear astrophysics at LUNA
• The activation method for cross section measurements in nuclear astrophysics
• Activation measurement of the 3He(a,g)7Be reaction cross section at high energies
• Deep Mixing in Evolved Stars. II. Interpreting Li Abundances in RGB and AGB Stars
• The Impact of Recent Advances in Laboratory Astrophysics on our Understanding of the Cosmos
• Bayesian Estimation of Thermonuclear Reaction Rates
• Gravitino Dark Matter and the Cosmic Lithium Abundances
• A revised thermonuclear rate of ${}^7$Be($n$,$\alpha$)${}^4$He relevant to Big-Bang nucleosynthesis
• Modified Debye-Huckel Electron Shielding and Penetration Factor
• Performing Bayesian analyses with AZURE2 using BRICK: an application to the ${}^7$Be system
• Resonant enhancement of nuclear reactions as a possible solution to the cosmological lithium problem
• $S$-factor and scattering-parameter extractions from ${}^3\mathrm{He}+{}^4\mathrm{He}\to {}^7\mathrm{Be}+\gamma$
• 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
• Cross section of ${}^3$He($\alpha$,$\gamma$)${}^7$Be around the ${}^7$Be proton separation threshold
• Low-energy ${}^3$He($\alpha$,$\alpha$)${}^3$He elastic scattering and the ${}^3$He($\alpha$,$\gamma$)${}^7$Be reaction
• Constraining Big Bang lithium production with recent solar neutrino data
• Exploring Stars in Underground Laboratories: Challenges and Solutions
• Solar fusion III: New data and theory for hydrogen-burning stars
• Electric and magnetic response to the continuum for A=7 isobars in a dicluster model
• Determination of the 3He+alpha\to 7Be asymp. normalization coefficients (nucl. vertex constants) and their application for extrapolation of the 3He(alpha,gamma)7Be astroph. S-factors to the solar energy region
• 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
• Experimental determination of the ${}^3$He($\alpha$,$\gamma$)${}^7$Be reaction cross section above the ${}^7$Be proton separation threshold
• New results for the astrophysical S-factor and reaction rate of radiative 3He4He capture
• Comparison of the LUNA 3He(alpha,gamma)7Be activation results with earlier measurements and model calculations
• Primordial Nucleosynthesis
• A study of the fine-structure constant dependence of radiative capture in Halo-EFT