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

被引：129

作者：

Lemut, A

Bemmerer, D

Confortola, F

Bonetti, R

Broggini, C

Corvisiero, P

Costantini, H

Cruz, J

Formicola, A

Fülöp, Z

Gervino, G

Guglielmetti, A

Gustavino, C

Gyürky, G

Imbriani, G

Jesus, AP

Junker, M

Limata, B

Menegazzo, R

Prati, P

Roca, V

Rogalla, D

Rolfs, C

Romano, M

Alvarez, CR

Schümann, F

Somorjai, E

Straniero, O

Strieder, F

Terrasi, F

Trautvetter, HP

机构：

[1] Univ Genoa, Dipartimento Fis, Genoa, Italy

[2] Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[3] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[4] Univ Milan, Ist Fis, I-20122 Milan, Italy

[5] Ist Nazl Fis Nucl, I-20122 Milan, Italy

[6] Univ Lisbon, Ctr Fis Nucl, P-1699 Lisbon, Portugal

[7] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, Italy

[8] ATOMKI, Debrecen, Hungary

[9] Univ Turin, Dipartimento Fis Sperimentale, Turin, Italy

[10] Ist Nazl Fis Nucl, Turin, Italy

[11] Univ Naples Federico II, Dipartimento Sci Fis, Naples, Italy

[12] Ist Nazl Fis Nucl, Naples, Italy

[13] Univ Naples 2, Caserta, Naples, Italy

[14] Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy

[15] Ruhr Univ Bochum, Inst Expt Phys 3, D-4630 Bochum, Germany

[16] Osservatorio Astron Collurania, Teramo, Italy

[17] Ist Nazl Fis Nucl, Sez Napoli, Teramo, Italy

来源：

PHYSICS LETTERS B | 2006年 / 634卷 / 5-6期

关键词：

CNO cycle; N-14(p; gamma); O-15; radiative captured; cross section measurement; AGB stars; hydrogen shell burning; underground nuclear astrophysics;

D O I：

10.1016/j.physletb.2006.02.021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In stars with temperatures above 20 x 10(6) K, hydrogen burning is dominated by the CNO cycle. Its rate is determined by the slowest process, the N-14(p, gamma)O-15 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 4 pi 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 x 10(6) K. for the first time with negligible impact from extrapolations. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：483 / 487

页数：5

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