The Ga-71(He-3, t) reaction and the low-energy neutrino response

D. Frekers*, H. Ejiri, H. Akimune, T. Adachi, B. Bilgier, B. A. Brown, B. T. Cleveland, H. Fujita, Y. Fujita, M. Fujiwara, E. Ganioglu, V. N. Gavrin, E. -W. Grewe, C. J. Guess, M. N. Harakeh, K. Hatanaka, R. Hodak, M. Holl, C. Iwamoto, N. T. KhaiH. C. Kozer, A. Lennarz, A. Okamoto, H. Okamura, P. P. Povinec, P. Puppe, F. Simkovic, G. Susoy, T. Suzuki, A. Tamii, J. H. Thies, J. Van de Walle, R. G. T. Zegers

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    A Ga-71(He-3,t)Ge-71 charge-exchange experiment was performed to extract with high precision the Gamow-Teller (GT) transition strengths to the three lowest-lying states in Ge-71, i.e., the ground state (1/2(-)), the 175 keV (5/2(-)) and the 500 key (3/2(-)) excited states. These are the relevant states, which are populated via a charged-current reaction induced by neutrinos from reactor-produced Cr-51 and Ar-37 sources. A precise measurement of the GT transition strengths is an important input into the calibration of the SAGE and GALLEX solar neutrino detectors and addresses a long-standing discrepancy between the measured and evaluated capture rates from the Cr-51 and Ar-37 neutrino calibration sources, which has recently spawned new ideas about unconventional neutrino properties. (C) 2011 Elsevier B.V. All rights reserved.

    Original languageEnglish
    Pages (from-to)134-138
    Number of pages5
    JournalPhysics Letters B
    Volume706
    Issue number2-3
    DOIs
    Publication statusPublished - 6-Dec-2011

    Keywords

    • Charge-exchange reaction
    • Gamow-Teller strength
    • Neutrino cross section
    • Solar neutrinos
    • SPECTROMETER GRAND RAIDEN
    • ELECTRON-CAPTURE DECAY
    • PF-SHELL NUCLEI
    • INTERNAL BREMSSTRAHLUNG
    • INTERMEDIATE ENERGIES
    • HE-3,T REACTIONS
    • CROSS-SECTIONS
    • P,N REACTION
    • SCATTERING
    • GALLEX

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