Activation measurement of the 3He(alpha,gamma)7Be cross section at low energy

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dc.creatorBemmerer, D.
dc.creatorConfortola, F.
dc.creatorCostantini, H.
dc.creatorFormicola, A.
dc.creatorGyurky, Gy.
dc.creatorBonetti, R.
dc.creatorBroggini, C.
dc.creatorCorvisiero, P.
dc.creatorElekes, Z.
dc.creatorFulop, Zs.
dc.creatorGervino, G.
dc.creatorGuglielmetti, A.
dc.creatorGustavino, C.
dc.creatorImbriani, G.
dc.creatorJunker, M.
dc.creatorLaubenstein, M.
dc.creatorLemut, A.
dc.creatorLimata, B.
dc.creatorLozza, V.
dc.creatorMarta, M.
dc.creatorMenegazzo, R.
dc.creatorPrati, P.
dc.creatorRoca, V.
dc.creatorRolfs, C.
dc.creatorAlvarez, C. Rossi
dc.creatorSomorjai, E.
dc.creatorStraniero, O.
dc.creatorStrieder, F.
dc.creatorTerrasi, F.
dc.creatorTrautvetter, H. P.
dc.date2006-09-11
dc.date.accessioned2026-07-07T07:25:36Z
dc.date.available2026-07-07T07:25:36Z
dc.descriptionThe nuclear physics input from the 3He(alpha,gamma)7Be cross section is a major uncertainty in the fluxes of 7Be and 8B neutrinos from the Sun predicted by solar models and in the 7Li abundance obtained in big-bang nucleosynthesis calculations. The present work reports on a new precision experiment using the activation technique at energies directly relevant to big-bang nucleosynthesis. Previously such low energies had been reached experimentally only by the prompt-gamma technique and with inferior precision. Using a windowless gas target, high beam intensity and low background gamma-counting facilities, the 3He(alpha,gamma)7Be cross section has been determined at 127, 148 and 169 keV center-of-mass energy with a total uncertainty of 4%. The sources of systematic uncertainty are discussed in detail. The present data can be used in big-bang nucleosynthesis calculations and to constrain the extrapolation of the 3He(alpha,gamma)7Be astrophysical S-factor to solar energies.
dc.identifierhttps://arxiv.org/abs/nucl-ex/0609013
dc.identifierhttp://arxiv.org/abs/nucl-ex/0609013
dc.identifierPhys.Rev.Lett. 97 (2006) 122502
dc.identifierdoi:10.1103/PhysRevLett.97.122502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/116773
dc.subjectNuclear Experiment
dc.subjectAstrophysics
dc.titleActivation measurement of the 3He(alpha,gamma)7Be cross section at low energy
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