The Fluorine Destruction in Stars: First Experimental Study of the F-19(p, alpha(0))O-16 Reaction at Astrophysical Energies

M. La Cognata; A. M. Mukhamedzhanov; C. Spitaleri; I. Indelicato; M. Aliotta; V. Burjan; S. Cherubini; A. Coc; M. Gulino; Z. Hons; G. G. Kiss; V. Kroha; L. Lamia; J. Mrazek; S. Palmerini; S. Piskor; R. G. Pizzone; S. M. R. Puglia; G. G. Rapisarda; S. Romano; M. L. Sergi; A. Tumino

doi:10.1088/2041-8205/739/2/L54

The Fluorine Destruction in Stars: First Experimental Study of the F-19(p, alpha(0))O-16 Reaction at Astrophysical Energies

M. La Cognata, A. M. Mukhamedzhanov, C. Spitaleri, I. Indelicato, M. Aliotta, V. Burjan, S. Cherubini, A. Coc, M. Gulino, Z. Hons, G. G. Kiss, V. Kroha, L. Lamia, J. Mrazek, S. Palmerini, S. Piskor, R. G. Pizzone, S. M. R. Puglia, G. G. Rapisarda, S. RomanoM. L. Sergi, A. Tumino

School of Physics and Astronomy

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Abstract / Description of output

The F-19(p, alpha)O-16 reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E-cm less than or similar to 300 keV), because of the hindrance effect of the Coulomb barrier. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution to the H-2(F-19, alpha O-16)n and the F-19(He-3, alpha O-16)d reactions. The TH measurement of the alpha(0) channel shows the presence of resonant structures not observed before, which cause an increase of the reaction rate at astrophysical temperatures up to a factor of 1.7, with potential consequences for stellar nucleosynthesis.

Original language	English
Article number	L54
Pages (from-to)	-
Number of pages	6
Journal	Astrophysical Journal Letters
Volume	739
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/739/2/L54
Publication status	Published - 1 Oct 2011

Keywords / Materials (for Non-textual outputs)

nuclear reactions, nucleosynthesis, abundances
stars: abundances
stars: AGB and post-AGB
ASYMPTOTIC GIANT BRANCH
CORONAE-BOREALIS STARS
NUCLEAR ASTROPHYSICS
COULOMB BARRIER
CROSS-SECTION
LOW-MASS
RANGE
RELEVANT
NUCLEOSYNTHESIS
CARBON

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10.1088/2041-8205/739/2/L54

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La Cognata, M., Mukhamedzhanov, A. M., Spitaleri, C., Indelicato, I., Aliotta, M., Burjan, V., Cherubini, S., Coc, A., Gulino, M., Hons, Z., Kiss, G. G., Kroha, V., Lamia, L., Mrazek, J., Palmerini, S., Piskor, S., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., ... Tumino, A. (2011). The Fluorine Destruction in Stars: First Experimental Study of the F-19(p, alpha(0))O-16 Reaction at Astrophysical Energies. Astrophysical Journal Letters, 739(2), -. Article L54. https://doi.org/10.1088/2041-8205/739/2/L54

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title = "The Fluorine Destruction in Stars: First Experimental Study of the F-19(p, alpha(0))O-16 Reaction at Astrophysical Energies",

abstract = "The F-19(p, alpha)O-16 reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E-cm less than or similar to 300 keV), because of the hindrance effect of the Coulomb barrier. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution to the H-2(F-19, alpha O-16)n and the F-19(He-3, alpha O-16)d reactions. The TH measurement of the alpha(0) channel shows the presence of resonant structures not observed before, which cause an increase of the reaction rate at astrophysical temperatures up to a factor of 1.7, with potential consequences for stellar nucleosynthesis.",

keywords = "nuclear reactions, nucleosynthesis, abundances, stars: abundances, stars: AGB and post-AGB, ASYMPTOTIC GIANT BRANCH, CORONAE-BOREALIS STARS, NUCLEAR ASTROPHYSICS, COULOMB BARRIER, CROSS-SECTION, LOW-MASS, RANGE, RELEVANT, NUCLEOSYNTHESIS, CARBON",

author = "{La Cognata}, M. and Mukhamedzhanov, {A. M.} and C. Spitaleri and I. Indelicato and M. Aliotta and V. Burjan and S. Cherubini and A. Coc and M. Gulino and Z. Hons and Kiss, {G. G.} and V. Kroha and L. Lamia and J. Mrazek and S. Palmerini and S. Piskor and Pizzone, {R. G.} and Puglia, {S. M. R.} and Rapisarda, {G. G.} and S. Romano and Sergi, {M. L.} and A. Tumino",

year = "2011",

month = oct,

day = "1",

doi = "10.1088/2041-8205/739/2/L54",

language = "English",

volume = "739",

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journal = "Astrophysical Journal Letters",

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La Cognata, M, Mukhamedzhanov, AM, Spitaleri, C, Indelicato, I, Aliotta, M, Burjan, V, Cherubini, S, Coc, A, Gulino, M, Hons, Z, Kiss, GG, Kroha, V, Lamia, L, Mrazek, J, Palmerini, S, Piskor, S, Pizzone, RG, Puglia, SMR, Rapisarda, GG, Romano, S, Sergi, ML & Tumino, A 2011, 'The Fluorine Destruction in Stars: First Experimental Study of the F-19(p, alpha(0))O-16 Reaction at Astrophysical Energies', Astrophysical Journal Letters, vol. 739, no. 2, L54, pp. -. https://doi.org/10.1088/2041-8205/739/2/L54

TY - JOUR

T1 - The Fluorine Destruction in Stars: First Experimental Study of the F-19(p, alpha(0))O-16 Reaction at Astrophysical Energies

AU - La Cognata, M.

AU - Mukhamedzhanov, A. M.

AU - Spitaleri, C.

AU - Indelicato, I.

AU - Aliotta, M.

AU - Burjan, V.

AU - Cherubini, S.

AU - Coc, A.

AU - Gulino, M.

AU - Hons, Z.

AU - Kiss, G. G.

AU - Kroha, V.

AU - Lamia, L.

AU - Mrazek, J.

AU - Palmerini, S.

AU - Piskor, S.

AU - Pizzone, R. G.

AU - Puglia, S. M. R.

AU - Rapisarda, G. G.

AU - Romano, S.

AU - Sergi, M. L.

AU - Tumino, A.

PY - 2011/10/1

Y1 - 2011/10/1

N2 - The F-19(p, alpha)O-16 reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E-cm less than or similar to 300 keV), because of the hindrance effect of the Coulomb barrier. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution to the H-2(F-19, alpha O-16)n and the F-19(He-3, alpha O-16)d reactions. The TH measurement of the alpha(0) channel shows the presence of resonant structures not observed before, which cause an increase of the reaction rate at astrophysical temperatures up to a factor of 1.7, with potential consequences for stellar nucleosynthesis.

AB - The F-19(p, alpha)O-16 reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E-cm less than or similar to 300 keV), because of the hindrance effect of the Coulomb barrier. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution to the H-2(F-19, alpha O-16)n and the F-19(He-3, alpha O-16)d reactions. The TH measurement of the alpha(0) channel shows the presence of resonant structures not observed before, which cause an increase of the reaction rate at astrophysical temperatures up to a factor of 1.7, with potential consequences for stellar nucleosynthesis.

KW - nuclear reactions, nucleosynthesis, abundances

KW - stars: abundances

KW - stars: AGB and post-AGB

KW - ASYMPTOTIC GIANT BRANCH

KW - CORONAE-BOREALIS STARS

KW - NUCLEAR ASTROPHYSICS

KW - COULOMB BARRIER

KW - CROSS-SECTION

KW - LOW-MASS

KW - RANGE

KW - RELEVANT

KW - NUCLEOSYNTHESIS

KW - CARBON

UR - http://www.scopus.com/inward/record.url?scp=80053483036&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/739/2/L54

DO - 10.1088/2041-8205/739/2/L54

M3 - Article

SN - 2041-8205

VL - 739

SP - -

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L54

ER -

The Fluorine Destruction in Stars: First Experimental Study of the F-19(p, alpha(0))O-16 Reaction at Astrophysical Energies

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