First measurement of the 14N(p,γ )15O cross section down to 70 keV

Lemut, Alberto; Bemmerer, D.; Confortola, F.; Bonetti, R.; Broggini, C.; Corvisiero, Pietro; Costantini, Heide; Cruz, J.; Formicola, A.; Fülöp, Z. s.; Gervino, G.; Guglielmetti, A.; Gustavino, C.; Gyürky, G. y.; Imbriani, G.; Jesus, A. P.; Junker, M.; Limata, B.; Menegazzo, R.; Prati, Paolo; Roca, V.; Rogalla, D.; Rolfs, C.; Romano, M.; Rossi Alvarez, C.; Schümann, F.; Somorjai, E.; Straniero, O.; Strieder, F.; Terrasi, F.; Trautvetter, H. P.

doi:10.1016/j.physletb.2006.02.021

In stars with temperatures above 20 × 106 K, hydrogen burning is dominated by the CNO cycle. Its rate is determined by the slowest process, the 14N(p, γ )15O reaction. Deep underground in Italy’s Gran Sasso laboratory, at the LUNA 400 kV accelerator, the cross section of this reaction has been measured at energies much lower than ever achieved before. Using a windowless gas target and a 4π BGO summing detector, direct cross section data has been obtained down to 70 keV, reaching a value of 0.24 picobarn. The Gamow peak has been covered by experimental data for several scenarios of stable and explosive hydrogen burning. In addition, the strength of the 259 keV resonance has been remeasured. The thermonuclear reaction rate has been calculated for temperatures 90–300 ×106 K, for the first time with negligible impact from extrapolations.

Scheda prodotto non validato

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Risorse UNIGE

Titolo:	First measurement of the 14N(p,γ )15O cross section down to 70 keV
Autori:	LEMUT, ALBERTO D. Bemmerer F. Confortola R. Bonetti C. Broggini CORVISIERO, PIETRO COSTANTINI, HEIDE J. Cruz A. Formicola Z.s. Fülöp G. Gervino A. Guglielmetti C. Gustavino G.y. Gyürky G. Imbriani A. P. Jesus M. Junker B. Limata R. Menegazzo PRATI, PAOLO V. Roca D. Rogalla C. Rolfs M. Romano C. Rossi Alvarez F. Schümann E. Somorjai O. Straniero F. Strieder F. Terrasi H. P. Trautvetter mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2006
Rivista:	PHYSICS LETTERS. SECTION B
Abstract:	In stars with temperatures above 20 × 106 K, hydrogen burning is dominated by the CNO cycle. Its rate is determined by the slowest process, the 14N(p, γ )15O reaction. Deep underground in Italy’s Gran Sasso laboratory, at the LUNA 400 kV accelerator, the cross section of this reaction has been measured at energies much lower than ever achieved before. Using a windowless gas target and a 4π BGO summing detector, direct cross section data has been obtained down to 70 keV, reaching a value of 0.24 picobarn. The Gamow peak has been covered by experimental data for several scenarios of stable and explosive hydrogen burning. In addition, the strength of the 259 keV resonance has been remeasured. The thermonuclear reaction rate has been calculated for temperatures 90–300 ×106 K, for the first time with negligible impact from extrapolations.
Handle:	http://hdl.handle.net/11567/504750
Appare nelle tipologie:	01.01 - Articolo su rivista

File in questo prodotto:

Non ci sono file associati a questo prodotto.

Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/11567/504750

Citazioni

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

CINECA IRIS Institutional Research Information System

Scheda prodotto non validato

File in questo prodotto: