First application of the Trojan horse method with a radioactive ion beam: Study of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>18</mml:mn></mml:msup><mml:mi mathvariant="normal">F</mml:mi><mml:msup><mml:mrow><mml:mo>(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>α</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:mn>15</mml:mn></mml:msup><mml:mi mathvariant="normal">O</mml:mi></mml:mrow></mml:math>reaction at astrophysical energies

Cherubini, S.; Gulino, M.; Spitaleri, C.; Rapisarda, G. G.; Cognata, M. La; Lamia, L.; Pizzone, R. G.; Romano, S.; Kubono, S.; Yamaguchi, H.; Hayakawa, S.; Wakabayashi, Y.; Iwasa, N.; Kato, S.; Komatsubara, T.; Teranishi, Takashi; Coc, A.; Séréville, N. de; Hammache, F.; Kiss, G. G.; Bishop, S.; Binh, D. N.

doi:10.1103/physrevc.92.015805

Cited by 76 publications

(19 citation statements)

References 44 publications

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“…The measurement explained so far, even if still preliminary and mainly used as a test of validity for THM usage in (α, p) reactions, represents the first measurement of the reaction studied. The same methodology has been widely used in recent works (11) (12) (13) (14) (15).…”

Section: Resultsmentioning

confidence: 99%

AGB nucleosynthesis: The 19F(α, p)22Ne reaction at astrophysical energies

D’Agata

Pizzone²,

Spitaleri

et al. 2017

AIP Conference Proceedings

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Section: Resultsmentioning

confidence: 99%

AGB nucleosynthesis: The 19F(α, p)22Ne reaction at astrophysical energies

D’Agata

Pizzone²,

Spitaleri

et al. 2017

AIP Conference Proceedings

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“…The first measurement using the Trojan horse method (THM) [25][26][27] with an RI beam has been performed at CRIB [28]. The measurement was to study the 18 F(p, α) 15 O reaction at low energies relevant to astrophysics via the three body reaction 2 H( 18 F, α 15 O)n. The 18 F(p, α) 15 O reaction rate is particularly responsible for the 511-keV γ ray emission in nova explosion phenomena.…”

Section: Indirect Measurementsmentioning

confidence: 99%

“…The momentum distribution for the p-n intercluster motion was in agreement with a Hulthén function, which proves the dominance of the quasi-free mechanism. Then the three-body cross section was converted into the two-body cross section, using the momentum distribution of the p-n intercluster motion and a kinematical factor (see [28] for further details). We successfully evaluated the reaction cross section at the novae temperature and even below experimentally for the first time.…”

Section: Indirect Measurementsmentioning

confidence: 99%

Experimental Studies of Light-Ion Nuclear Reactions Using Low-Energy RI Beams

Kahl¹,

Hayakawa²,

Sakaguchi³

et al. 2017

Proceedings of the 14th International Symposium on Nuclei in the Cosmos (NIC2016)

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CRIB (CNS Radio-Isotope Beam separator) is a low-energy RI beam separator of Center for Nuclear Study (CNS), the University of Tokyo. Studies on nuclear astrophysics, nuclear structure, and other interests have been performed using the RI beams at CRIB, forming international collaborations. A striking method to study astrophyiscal reactions involving radioactive nuclei is the thick-target method in inverse kinematics. Several astrophysical alpha-induced reactions have been be studied with that method at CRIB. A recent example is on the α resonant scattering with a radioactive 7 Be beam. This study is related to the astrophysical 7 Be(α,γ) reactions, important at hot p-p chain and νp-process in supernovae. There have been measurements based on several indirect methods, such as the asymptotic normalization coefficient (ANC) and Trojan horse method (THM). The first THM measurement using an RI beam has been performed at CRIB, to study the 18 F(p, α) 15 O reaction at astrophysical energies via the three body reaction 2 H( 18 F, α 15 O)n. The 18 F(p, α) 15 O reaction rate is crucial to understand the 511-keV γ-ray production in nova explosion phenomena, and we successfully evaluated the reaction cross section at novae temperature and below experimentally for the first time.

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“…It aims to study low energy nuclear reactions hindered by the Coulomb barrier and, since then, it has been successfully applied to several reactions of astrophysical interest [12,13,14]. Recently, this approach has been extended to the radioactive ion beams [15,16] and to the neutron induced reactions [17]. Here, the 17 O(n,α) 14 C reaction has been studied via the THM experiment 2 H( 17 O,α 14 C)p, where deuteron has been chosen as TH-nucleus thanks to its obvious p − n structure and its well-known radial wave function for the intercluster s-wave p − n motion given by the Hulthén wave function [18].…”

Section: The Experimentsmentioning

confidence: 99%

Trojan horse method with neutrons induced reactions: The 17O(n,α)14C reaction

Guardo

Spitaleri

Lamia

et al. 2017

AIP Conference Proceedings

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Abstract. The experimental study of the 17 O(n,α) 14 C reaction has been performed in the energy range 0-350 keV. This reaction could play an important role in explaining heavy elements (s-process) nucleosynthesis in various astrophysical scenario. To overcome the practical problems arising from the neutrons production, a new application of the Trojan Horse Method has been recently suggested. In more details, the 17 O(n,α) 14 C reaction has been studied using the quasi-free 2 H( 17 O,α 14 C) 1 H reaction, induced at an energy of 43.5 MeV. The measurement allows one to investigate the =3, 75 keV resonance (E * =8.125 MeV, J π =5 − ), absent in the available direct measurements because of centrifugal suppression effects. Moreover, the results show that the contribution of the 166 keV and 236 keV resonances is in energy agreement with the available direct data. A clear contribution of the -7 keV subthreshold level is also present.

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First application of the Trojan horse method with a radioactive ion beam: Study of the18F(p,α)15Oreaction at astrophysical energies

Cited by 76 publications

References 44 publications

AGB nucleosynthesis: The 19F(α, p)22Ne reaction at astrophysical energies

AGB nucleosynthesis: The 19F(α, p)22Ne reaction at astrophysical energies

Experimental Studies of Light-Ion Nuclear Reactions Using Low-Energy RI Beams

Trojan horse method with neutrons induced reactions: The 17O(n,α)14C reaction

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