Experimental study of proton-induced nuclear reactions in 6,7Li

João Cruz; H. Luis; Micaela Fonseca; Z. Fülöp; G. Gyürky; F. Raiola; M. Aliotta; K. U. Kettner; A. P. Jesus; J. P. Ribeiro; F. C. Barker; C. Rolfs

doi:10.1088/0954-3899/35/1/014004

Experimental study of proton-induced nuclear reactions in ^6,7Li

João Cruz, H. Luis, Micaela Fonseca, Z. Fülöp, G. Gyürky, F. Raiola, M. Aliotta, K. U. Kettner, A. P. Jesus, J. P. Ribeiro, F. C. Barker, C. Rolfs

DF – Departamento de Física

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

The ⁶Li(p,α)³He and ⁷Li(p,α) ⁴He reaction cross sections were obtained for E = 90-580 keV and E = 90-1740 keV, respectively. R-matrix and polynomial fits to the bare astrophysical S-factor confirmed, with improved accuracy, previous work data, yielding S_b(0) = 3.52 0.08 MeV b, and 55.6^+0.8 _-1.7 keV b for the ⁶Li and ⁷Li reactions, respectively. Therefore, the astrophysical consequences related to these two isotopes remain essentially unchanged. With the present work S_b(E) data, a reanalysis of the low energy data for different environments - Li ₂WO₄ insulator, Li metal, and PdLi_x alloys - confirms that the large electron screening effects can be explained by the plasma model of Debye applied to the quasi-free electrons in the metallic samples.

Original language	English
Article number	014004
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	35
Issue number	1
DOIs	https://doi.org/10.1088/0954-3899/35/1/014004
Publication status	Published - 7 Feb 2008
Event	3rd Europhysics Conference on Nuclear Physics in Astrophysics (NPA3) - Dresden, Germany Duration: 26 Mar 2007 → 31 Mar 2007

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title = "Experimental study of proton-induced nuclear reactions in 6,7Li",

abstract = "The 6Li(p,α)3He and 7Li(p,α) 4He reaction cross sections were obtained for E = 90-580 keV and E = 90-1740 keV, respectively. R-matrix and polynomial fits to the bare astrophysical S-factor confirmed, with improved accuracy, previous work data, yielding Sb(0) = 3.52 0.08 MeV b, and 55.6+0.8 -1.7 keV b for the 6Li and 7Li reactions, respectively. Therefore, the astrophysical consequences related to these two isotopes remain essentially unchanged. With the present work Sb(E) data, a reanalysis of the low energy data for different environments - Li 2WO4 insulator, Li metal, and PdLix alloys - confirms that the large electron screening effects can be explained by the plasma model of Debye applied to the quasi-free electrons in the metallic samples.",

author = "Jo{\~a}o Cruz and H. Luis and Micaela Fonseca and Z. F{\"u}l{\"o}p and G. Gy{\"u}rky and F. Raiola and M. Aliotta and Kettner, {K. U.} and Jesus, {A. P.} and Ribeiro, {J. P.} and Barker, {F. C.} and C. Rolfs",

note = "Funding: Science and Technology Facilities Council (ST/F500572/1); 3rd Europhysics Conference on Nuclear Physics in Astrophysics (NPA3) ; Conference date: 26-03-2007 Through 31-03-2007",

year = "2008",

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doi = "10.1088/0954-3899/35/1/014004",

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TY - JOUR

T1 - Experimental study of proton-induced nuclear reactions in 6,7Li

AU - Cruz, João

AU - Luis, H.

AU - Fonseca, Micaela

AU - Fülöp, Z.

AU - Gyürky, G.

AU - Raiola, F.

AU - Aliotta, M.

AU - Kettner, K. U.

AU - Jesus, A. P.

AU - Ribeiro, J. P.

AU - Barker, F. C.

AU - Rolfs, C.

N1 - Funding: Science and Technology Facilities Council (ST/F500572/1)

PY - 2008/2/7

Y1 - 2008/2/7

N2 - The 6Li(p,α)3He and 7Li(p,α) 4He reaction cross sections were obtained for E = 90-580 keV and E = 90-1740 keV, respectively. R-matrix and polynomial fits to the bare astrophysical S-factor confirmed, with improved accuracy, previous work data, yielding Sb(0) = 3.52 0.08 MeV b, and 55.6+0.8 -1.7 keV b for the 6Li and 7Li reactions, respectively. Therefore, the astrophysical consequences related to these two isotopes remain essentially unchanged. With the present work Sb(E) data, a reanalysis of the low energy data for different environments - Li 2WO4 insulator, Li metal, and PdLix alloys - confirms that the large electron screening effects can be explained by the plasma model of Debye applied to the quasi-free electrons in the metallic samples.

AB - The 6Li(p,α)3He and 7Li(p,α) 4He reaction cross sections were obtained for E = 90-580 keV and E = 90-1740 keV, respectively. R-matrix and polynomial fits to the bare astrophysical S-factor confirmed, with improved accuracy, previous work data, yielding Sb(0) = 3.52 0.08 MeV b, and 55.6+0.8 -1.7 keV b for the 6Li and 7Li reactions, respectively. Therefore, the astrophysical consequences related to these two isotopes remain essentially unchanged. With the present work Sb(E) data, a reanalysis of the low energy data for different environments - Li 2WO4 insulator, Li metal, and PdLix alloys - confirms that the large electron screening effects can be explained by the plasma model of Debye applied to the quasi-free electrons in the metallic samples.

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M3 - Article

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SN - 0954-3899

VL - 35

JO - Journal of Physics G: Nuclear and Particle Physics

JF - Journal of Physics G: Nuclear and Particle Physics

IS - 1

M1 - 014004

T2 - 3rd Europhysics Conference on Nuclear Physics in Astrophysics (NPA3)

Y2 - 26 March 2007 through 31 March 2007

ER -

Experimental study of proton-induced nuclear reactions in ^6,7Li

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