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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
  • LUNA Collaboration
  • C. G. Bruno
  • D. A. Scott
  • A. Formicola
  • M. AliottaEmail author
  • 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. Guglielmetti
  • C. Gustavino
  • Gy. Gyürky
  • G. Imbriani
  • M. Junker
  • R. Menegazzo
  • E. Napolitani
  • P. Prati
  • E. Somorjai
  • O. Straniero
  • F. Strieder
  • T. Szücs
  • D. Trezzi
Regular Article - Experimental Physics

Abstract.

We report on measurements of resonance strengths and energies for the \( E_{p} = 151\) and 193 keV resonances in the 18O(p,\(\alpha\))15N and 17O(p,\(\alpha\))14N reactions, respectively, obtained during commissioning of a new setup for alpha-particle detection studies at the LUNA underground laboratory. Our values, \(\omega\gamma (151)=164.2\pm 0.9_{stat} {}^{+12.1}_{-11.7} {}_{syst}\) meV and \(\omega\gamma (193)=1.68\pm 0.03_{stat} \pm 0.12_{syst}\) meV, are in excellent agreement with those reported in the literature. New values of resonance energies are \( E_{p}=151.2 \pm 0.3\) keV and \( E_{p}=194.8 \pm 0.3\) keV, 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.

Keywords

Alpha Particle Foil Thickness Background Suppression Target Holder Resonance Strength 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • LUNA Collaboration
  • C. G. Bruno
    • 1
  • D. A. Scott
    • 1
  • A. Formicola
    • 2
  • M. Aliotta
    • 1
  • T. Davinson
    • 1
  • M. Anders
    • 3
  • A. Best
    • 2
  • D. Bemmerer
    • 3
  • C. Broggini
    • 4
  • A. Caciolli
    • 4
    • 5
  • F. Cavanna
    • 6
  • P. Corvisiero
    • 6
  • R. Depalo
    • 4
    • 5
  • A. Di Leva
    • 7
  • Z. Elekes
    • 8
  • Zs. Fülöp
    • 8
  • G. Gervino
    • 9
  • C. J. Griffin
    • 1
  • A. Guglielmetti
    • 10
  • C. Gustavino
    • 11
  • Gy. Gyürky
    • 8
  • G. Imbriani
    • 7
  • M. Junker
    • 2
  • R. Menegazzo
    • 4
  • E. Napolitani
    • 5
  • P. Prati
    • 6
  • E. Somorjai
    • 8
  • O. Straniero
    • 2
    • 12
  • F. Strieder
    • 13
  • T. Szücs
    • 3
  • D. Trezzi
    • 10
  1. 1.SUPA, School of Physics and AstronomyUniversity of EdinburghEdinburghUK
  2. 2.INFNLaboratori Nazionali del Gran SassoAssergiItaly
  3. 3.Helmholtz-Zentrum Dresden-Rossendorf(HZDR)DresdenGermany
  4. 4.INFNSezione di PadovaPadovaItaly
  5. 5.Dipartimento di Fisica e AstronomiaUniversità di PadovaPadovaItaly
  6. 6.Dipartimento di Fisica, Università di GenovaINFNGenovaItaly
  7. 7.Dipartimento di Scienze FisicheUniversità di Napoli “Federico II”NapoliItaly
  8. 8.Institute of Nuclear Research(MTA Atomki)DebrecenHungary
  9. 9.Dipartimento di Fisica SperimentaleUniversità degli Studi di TorinoTorinoItaly
  10. 10.Università degli Studi di Milano and INFNMilanoItaly
  11. 11.INFNRomaItaly
  12. 12.Osservatorio Astronomico di ColluraniaTeramoItaly
  13. 13.South Dakota School of Mines and TechnologyRapid CityUSA

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