Resonance strengths in the 17,18O(p,gamma)14,15N reactions and background suppression underground
- Creators
- 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
- Z. Fulop
- G. Gervino
- C. J. Griffin
- A. Guglielmetti
- C. Gustavino
- G. Gyurky
- G. Imbriani
- M. Junker
- R. Menegazzo
- E. Napolitani
- P. PRATI
- E. Somorjai
- O. Straniero
- F. Strieder
- T. Szucs
- D. Trezzi
- Others:
- 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.
- Fulop, Z.
- Gervino, G.
- Griffin, C. J.
- Guglielmetti, A.
- Gustavino, C.
- Gyurky, G.
- Imbriani, G.
- Junker, M.
- Menegazzo, R.
- Napolitani, E.
- Prati, P.
- Somorjai, E.
- Straniero, O.
- Strieder, F.
- Szucs, T.
- Trezzi, D.
Description
We report on measurements of resonance strengths and energies for the Ep = 151 and 193 keV resonances in the 18O(p,gamma)15N and 17O(p,gamma)14N reactions, respectively, obtained during commissioning of a new setup for alpha-particle detection studies at the LUNA underground laboratory. Our values, omegagamma(151) = 164.2 ± 0.9 stat+12.1−11.7 syst meV and omegagamma(193) = 1.68 ± 0.03 stat ± 0.12 syst 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 ± 0.3 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 200 keV. This clearly demonstrates the usefulness of underground measurements in charged-particles experiments, especially at low detection energies.
Additional details
- URL
- http://hdl.handle.net/11567/812890
- URN
- urn:oai:iris.unige.it:11567/812890
- Origin repository
- UNIGE