Resonance strengths in the 17,18O(p, α)14,15N reactions and background suppression underground: Commissioning of a new setup for charged-particle detection at LUNA

Collaboration LUNA Collaboration, C. G. Bruno, D. A. Scott, A. Formicola, M. Aliotta, T. Davinson, M. Anders, A. Best, D. Bemmerer, C. Broggini, A. Caciolli, F. Cavanna, P. Corvisiero, R. Depalo, A. Di Leva, Z. Elekes, Zs Fülöp, G. Gervino, C. J. Griffin, A. GuglielmettiC. Gustavino, Gy Gyürky, G. Imbriani, M. Junker, R. Menegazzo, E. Napolitani, P. Prati, E. Somorjai, O. Straniero, F. Strieder, T. Szücs, D. Trezzi

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22 Citations (Scopus)

Abstract

We report on measurements of resonance strengths and energies for the Ep = 151 and 193 keV resonances in the 18O(p,α)15N and 17O(p,α)14N reactions, respectively, obtained during commissioning of a new setup for alpha-particle detection studies at the LUNA underground laboratory. Our values, (Formula Presented.) meV, are in excellent agreement with those reported in the literature. New values of resonance energies are Ep =151.2±0.3keV and Ep =194.8±0.3keV, respectively, this latter with the highest precision to date. Comparative background measurements in silicon detectors overground and underground were also carried out, yielding up to a factor of 15 in background suppression at LUNA at energies around 200keV. This clearly demonstrates the usefulness of underground measurements in charged-particles experiments, especially at low detection energies.

Original languageEnglish
Article number94
JournalEuropean Physical Journal A
Volume51
Issue number8
DOIs
Publication statusPublished - Aug 3 2015

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    LUNA Collaboration, C., Bruno, C. G., Scott, D. A., Formicola, A., Aliotta, M., Davinson, T., Anders, M., Best, A., Bemmerer, D., Broggini, C., Caciolli, A., Cavanna, F., Corvisiero, P., Depalo, R., Di Leva, A., Elekes, Z., Fülöp, Z., Gervino, G., Griffin, C. J., ... Trezzi, D. (2015). Resonance strengths in the 17,18O(p, α)14,15N reactions and background suppression underground: Commissioning of a new setup for charged-particle detection at LUNA. European Physical Journal A, 51(8), [94]. https://doi.org/10.1140/epja/i2015-15094-y