Underground measurement of 14N(p, γ)15O astrophysical factor at low energy

F. Confortola, D. Bemmerer, R. Bonetti, C. Broggini, M. L. Casanova, P. Corvisiero, H. Costantini, J. Cruz, A. Formicola, Zs. S. Fülöp, G. Gervino, A. Guglielmetti, C. Gustavino, G. Gyürky, G. Imbriani, A. P. Jesus, M. Junker, A. Lemut, M. Marta, R. MenegazzoP. Prati, V. Roca, C. Rolfs, C. Rossi-Alvarez, F. Schümann, E. Somorjai, O. Straniero, F. Strieder, F. Terrasi, H. P. Trautvetter

Research output: Contribution to journalArticle

Abstract

In stars, four hydrogen nuclei are converted into a helium nucleus by two competing nuclear fusion processes: the proton - proton chain (p-p) and the carbon - nitrogen - oxygen (CNO) cycle. At temperatures higher than 2 10 7 K, the CNO cycle dominates the energy production. In particular, its rate is determined by the slowest reaction: 14N(p, γ) 15O. Direct measurement in a laboratory at the surface of the Earth is hampered by the background due to the cosmic rays. Here we report on an experiment performed with the LUNA (Laboratory for Underground Nuclear Astrophysics) accelerator placed deep underground in the Gran Sasso laboratory (Italy). Thanks to the cosmic ray suppression provided by the mountain shield, we could measure the 14N(p, γ)15O cross section for the first time directly at energies corresponding to stellar temperatures and with unprecedented accuracy. The results are strictly related to carbon stars formation, an independent lower limit on the age of the universe and solar neutrinos flux. The 13N and 15O neutrinos coming from the CNO cycle are strictly correlated to the 14N(p, γ) 15O S-factor and their flux will play an important role in some future solar neutrino experiment, such as Borexino.

Original languageEnglish
Article number063
Pages (from-to)263-265
Number of pages3
JournalJournal of Physics: Conference Series
Volume39
Issue number1
DOIs
Publication statusPublished - Apr 1 2006

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astrophysics
solar neutrinos
nitrogen
cycles
carbon
cosmic rays
oxygen
neutrinos
stellar temperature
nuclear astrophysics
carbon stars
nuclei
protons
nuclear fusion
mountains
Italy
energy
star formation
accelerators
universe

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Confortola, F., Bemmerer, D., Bonetti, R., Broggini, C., Casanova, M. L., Corvisiero, P., ... Trautvetter, H. P. (2006). Underground measurement of 14N(p, γ)15O astrophysical factor at low energy. Journal of Physics: Conference Series, 39(1), 263-265. [063]. https://doi.org/10.1088/1742-6596/39/1/063

Underground measurement of 14N(p, γ)15O astrophysical factor at low energy. / Confortola, F.; Bemmerer, D.; Bonetti, R.; Broggini, C.; Casanova, M. L.; Corvisiero, P.; Costantini, H.; Cruz, J.; Formicola, A.; Fülöp, Zs. S.; Gervino, G.; Guglielmetti, A.; Gustavino, C.; Gyürky, G.; Imbriani, G.; Jesus, A. P.; Junker, M.; Lemut, A.; Marta, M.; Menegazzo, R.; Prati, P.; Roca, V.; Rolfs, C.; Rossi-Alvarez, C.; Schümann, F.; Somorjai, E.; Straniero, O.; Strieder, F.; Terrasi, F.; Trautvetter, H. P.

In: Journal of Physics: Conference Series, Vol. 39, No. 1, 063, 01.04.2006, p. 263-265.

Research output: Contribution to journalArticle

Confortola, F, Bemmerer, D, Bonetti, R, Broggini, C, Casanova, ML, Corvisiero, P, Costantini, H, Cruz, J, Formicola, A, Fülöp, ZS, Gervino, G, Guglielmetti, A, Gustavino, C, Gyürky, G, Imbriani, G, Jesus, AP, Junker, M, Lemut, A, Marta, M, Menegazzo, R, Prati, P, Roca, V, Rolfs, C, Rossi-Alvarez, C, Schümann, F, Somorjai, E, Straniero, O, Strieder, F, Terrasi, F & Trautvetter, HP 2006, 'Underground measurement of 14N(p, γ)15O astrophysical factor at low energy', Journal of Physics: Conference Series, vol. 39, no. 1, 063, pp. 263-265. https://doi.org/10.1088/1742-6596/39/1/063
Confortola F, Bemmerer D, Bonetti R, Broggini C, Casanova ML, Corvisiero P et al. Underground measurement of 14N(p, γ)15O astrophysical factor at low energy. Journal of Physics: Conference Series. 2006 Apr 1;39(1):263-265. 063. https://doi.org/10.1088/1742-6596/39/1/063
Confortola, F. ; Bemmerer, D. ; Bonetti, R. ; Broggini, C. ; Casanova, M. L. ; Corvisiero, P. ; Costantini, H. ; Cruz, J. ; Formicola, A. ; Fülöp, Zs. S. ; Gervino, G. ; Guglielmetti, A. ; Gustavino, C. ; Gyürky, G. ; Imbriani, G. ; Jesus, A. P. ; Junker, M. ; Lemut, A. ; Marta, M. ; Menegazzo, R. ; Prati, P. ; Roca, V. ; Rolfs, C. ; Rossi-Alvarez, C. ; Schümann, F. ; Somorjai, E. ; Straniero, O. ; Strieder, F. ; Terrasi, F. ; Trautvetter, H. P. / Underground measurement of 14N(p, γ)15O astrophysical factor at low energy. In: Journal of Physics: Conference Series. 2006 ; Vol. 39, No. 1. pp. 263-265.
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abstract = "In stars, four hydrogen nuclei are converted into a helium nucleus by two competing nuclear fusion processes: the proton - proton chain (p-p) and the carbon - nitrogen - oxygen (CNO) cycle. At temperatures higher than 2 10 7 K, the CNO cycle dominates the energy production. In particular, its rate is determined by the slowest reaction: 14N(p, γ) 15O. Direct measurement in a laboratory at the surface of the Earth is hampered by the background due to the cosmic rays. Here we report on an experiment performed with the LUNA (Laboratory for Underground Nuclear Astrophysics) accelerator placed deep underground in the Gran Sasso laboratory (Italy). Thanks to the cosmic ray suppression provided by the mountain shield, we could measure the 14N(p, γ)15O cross section for the first time directly at energies corresponding to stellar temperatures and with unprecedented accuracy. The results are strictly related to carbon stars formation, an independent lower limit on the age of the universe and solar neutrinos flux. The 13N and 15O neutrinos coming from the CNO cycle are strictly correlated to the 14N(p, γ) 15O S-factor and their flux will play an important role in some future solar neutrino experiment, such as Borexino.",
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AU - Confortola, F.

AU - Bemmerer, D.

AU - Bonetti, R.

AU - Broggini, C.

AU - Casanova, M. L.

AU - Corvisiero, P.

AU - Costantini, H.

AU - Cruz, J.

AU - Formicola, A.

AU - Fülöp, Zs. S.

AU - Gervino, G.

AU - Guglielmetti, A.

AU - Gustavino, C.

AU - Gyürky, G.

AU - Imbriani, G.

AU - Jesus, A. P.

AU - Junker, M.

AU - Lemut, A.

AU - Marta, M.

AU - Menegazzo, R.

AU - Prati, P.

AU - Roca, V.

AU - Rolfs, C.

AU - Rossi-Alvarez, C.

AU - Schümann, F.

AU - Somorjai, E.

AU - Straniero, O.

AU - Strieder, F.

AU - Terrasi, F.

AU - Trautvetter, H. P.

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N2 - In stars, four hydrogen nuclei are converted into a helium nucleus by two competing nuclear fusion processes: the proton - proton chain (p-p) and the carbon - nitrogen - oxygen (CNO) cycle. At temperatures higher than 2 10 7 K, the CNO cycle dominates the energy production. In particular, its rate is determined by the slowest reaction: 14N(p, γ) 15O. Direct measurement in a laboratory at the surface of the Earth is hampered by the background due to the cosmic rays. Here we report on an experiment performed with the LUNA (Laboratory for Underground Nuclear Astrophysics) accelerator placed deep underground in the Gran Sasso laboratory (Italy). Thanks to the cosmic ray suppression provided by the mountain shield, we could measure the 14N(p, γ)15O cross section for the first time directly at energies corresponding to stellar temperatures and with unprecedented accuracy. The results are strictly related to carbon stars formation, an independent lower limit on the age of the universe and solar neutrinos flux. The 13N and 15O neutrinos coming from the CNO cycle are strictly correlated to the 14N(p, γ) 15O S-factor and their flux will play an important role in some future solar neutrino experiment, such as Borexino.

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