First measurement of the

R. Bonetti, C. Broggini, L. Campajola, P. Corvisiero, A. D’alessandro, M. Dessalvi, A. D’onofrio, A. Fubini, G. Gervino, L. Gialanella, U. Greife, A. Guglielmetti, C. Gustavino, G. Imbriani, M. Junker, P. Prati, V. Roca, C. Rolfs, M. Romano, F. SchuemannF. Strieder, F. Terrasi, H.P. Trautvetter, S. Zavatarelli

Research output: Contribution to journalArticle

185 Citations (Scopus)


We give the LUNA results on the s\(E\) cross section measurement of a key reaction of the proton-proton chain strongly affecting the calculated neutrino luminosity from the Sun:3He\(3He,2p\)4He. Because of the cosmic ray suppression provided by the Gran Sasso underground laboratory, it has been possible to measure s\(E\) throughout the energy range in which this reaction occurs in the Sun, i.e., down to 16.5 keV center of mass energy. The data clearly show the cross section increase due to the electron screening effect but they do not exhibit any evidence for a narrow resonance suggested to explain the8B and7Be solar neutrino flux reduction. © 1999 The American Physical Society.
Original languageEnglish
Pages (from-to)5205 - 5208
Number of pages4
JournalPhysical Review Letters
Issue number26
Publication statusPublished - 1999
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Bonetti, R., Broggini, C., Campajola, L., Corvisiero, P., D’alessandro, A., Dessalvi, M., ... Zavatarelli, S. (1999). First measurement of the. Physical Review Letters, 82(26), 5205 - 5208.