A new study of the 22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance

LUNA Collaboration; F. Cavanna; R. Depalo; M-L Menzel; M. Aliotta; M. Anders; D. Bemmerer; C. Broggini; C. G. Bruno; A. Caciolli; P. Corvisiero; T. Davinson; A. di Leva; Z. Elekes; F. Ferraro; A. Formicola; Zs. Fueloep; G. Gervino; A. Guglielmetti; C. Gustavino; Gy. Gyuerky; G. Imbriani; M. Junker; R. Menegazzo; P. Prati; C. Rossi Alvarez; D. A. Scott; E. Somorjai; O. Straniero; F. Strieder; T. Szuecs; D. Trezzi

doi:10.1140/epja/i2014-14179-5

A new study of the 22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance

LUNA Collaboration, F. Cavanna, R. Depalo, M-L Menzel, M. Aliotta, M. Anders, D. Bemmerer^*, C. Broggini, C. G. Bruno, A. Caciolli, P. Corvisiero, T. Davinson, A. di Leva, Z. Elekes, F. Ferraro, A. Formicola, Zs. Fueloep, G. Gervino, A. Guglielmetti, C. GustavinoGy. Gyuerky, G. Imbriani, M. Junker, R. Menegazzo, P. Prati, C. Rossi Alvarez, D. A. Scott, E. Somorjai, O. Straniero, F. Strieder, T. Szuecs, D. Trezzi

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract / Description of output

The Ne-22(p, gamma)Na-23 reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle is active in asymptotic giant branch stars as well as in novae and contributes to the nucleosythesis of neon and sodium isotopes. In order to reduce the uncertainties in the predicted nucleosynthesis yields, new experimental efforts to measure the Ne-22(p, gamma)Na-23 cross section directly at the astrophysically relevant energies are needed. In the present work, a feasibility study for a Ne-22(p, gamma)Na-23 experiment at the Laboratory for Underground Nuclear Astrophysics (LUNA) 400 kV accelerator deep underground in the Gran Sasso laboratory, Italy, is reported. The ion-beam-induced.-ray background has been studied. The feasibility study led to the first observation of the E-p = 186 keV resonance in a direct experiment. An experimental lower limit of 0.12 x 10(-6) eV has been obtained for the resonance strength. Informed by the feasibility study, a dedicated experimental setup for the Ne-22(p, gamma)Na-23 experiment has been developed. The new setup has been characterized by a study of the temperature and pressure profiles. The beam heating effect that reduces the effective neon gas density due to the heating by the incident proton beam has been studied using the resonance scan technique, and the size of this effect has been determined for a neon gas target.

Original language	English
Article number	179
Number of pages	10
Journal	The European Physical Journal A (EPJ A)
Volume	50
Issue number	11
DOIs	https://doi.org/10.1140/epja/i2014-14179-5
Publication status	Published - 27 Nov 2014

Keywords / Materials (for Non-textual outputs)

THERMONUCLEAR REACTION-RATES
LOW-ENERGY RESONANCES
NUCLEAR ASTROPHYSICS
NOVA NUCLEOSYNTHESIS
GAS-TARGET
AGB STARS
LUNA
CAPTURE
BEAM
ACCELERATOR

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10.1140/epja/i2014-14179-5

http://link.springer.com/10.1140/epja/i2014-14179-5

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LUNA Collaboration, Cavanna, F., Depalo, R., Menzel, M.-L., Aliotta, M., Anders, M., Bemmerer, D., Broggini, C., Bruno, C. G., Caciolli, A., Corvisiero, P., Davinson, T., di Leva, A., Elekes, Z., Ferraro, F., Formicola, A., Fueloep, Z., Gervino, G., Guglielmetti, A., ... Trezzi, D. (2014). A new study of the 22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance. The European Physical Journal A (EPJ A), 50(11), Article 179. https://doi.org/10.1140/epja/i2014-14179-5

@article{506dca07e24049a2afbe07b6b8c00a79,

title = "A new study of the 22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance",

abstract = "The Ne-22(p, gamma)Na-23 reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle is active in asymptotic giant branch stars as well as in novae and contributes to the nucleosythesis of neon and sodium isotopes. In order to reduce the uncertainties in the predicted nucleosynthesis yields, new experimental efforts to measure the Ne-22(p, gamma)Na-23 cross section directly at the astrophysically relevant energies are needed. In the present work, a feasibility study for a Ne-22(p, gamma)Na-23 experiment at the Laboratory for Underground Nuclear Astrophysics (LUNA) 400 kV accelerator deep underground in the Gran Sasso laboratory, Italy, is reported. The ion-beam-induced.-ray background has been studied. The feasibility study led to the first observation of the E-p = 186 keV resonance in a direct experiment. An experimental lower limit of 0.12 x 10(-6) eV has been obtained for the resonance strength. Informed by the feasibility study, a dedicated experimental setup for the Ne-22(p, gamma)Na-23 experiment has been developed. The new setup has been characterized by a study of the temperature and pressure profiles. The beam heating effect that reduces the effective neon gas density due to the heating by the incident proton beam has been studied using the resonance scan technique, and the size of this effect has been determined for a neon gas target.",

keywords = "THERMONUCLEAR REACTION-RATES, LOW-ENERGY RESONANCES, NUCLEAR ASTROPHYSICS, NOVA NUCLEOSYNTHESIS, GAS-TARGET, AGB STARS, LUNA, CAPTURE, BEAM, ACCELERATOR",

author = "{LUNA Collaboration} and F. Cavanna and R. Depalo and M-L Menzel and M. Aliotta and M. Anders and D. Bemmerer and C. Broggini and Bruno, {C. G.} and A. Caciolli and P. Corvisiero and T. Davinson and {di Leva}, A. and Z. Elekes and F. Ferraro and A. Formicola and Zs. Fueloep and G. Gervino and A. Guglielmetti and C. Gustavino and Gy. Gyuerky and G. Imbriani and M. Junker and R. Menegazzo and P. Prati and Alvarez, {C. Rossi} and Scott, {D. A.} and E. Somorjai and O. Straniero and F. Strieder and T. Szuecs and D. Trezzi",

year = "2014",

month = nov,

day = "27",

doi = "10.1140/epja/i2014-14179-5",

language = "English",

volume = "50",

journal = "The European Physical Journal A (EPJ A)",

issn = "1434-6001",

publisher = "Springer",

number = "11",

}

LUNA Collaboration, Cavanna, F, Depalo, R, Menzel, M-L, Aliotta, M, Anders, M, Bemmerer, D, Broggini, C, Bruno, CG, Caciolli, A, Corvisiero, P, Davinson, T, di Leva, A, Elekes, Z, Ferraro, F, Formicola, A, Fueloep, Z, Gervino, G, Guglielmetti, A, Gustavino, C, Gyuerky, G, Imbriani, G, Junker, M, Menegazzo, R, Prati, P, Alvarez, CR, Scott, DA, Somorjai, E, Straniero, O, Strieder, F, Szuecs, T & Trezzi, D 2014, 'A new study of the 22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance', The European Physical Journal A (EPJ A), vol. 50, no. 11, 179. https://doi.org/10.1140/epja/i2014-14179-5

TY - JOUR

T1 - A new study of the 22Ne(p, γ)23Na reaction deep underground

T2 - Feasibility, setup and first observation of the 186 keV resonance

AU - LUNA Collaboration

AU - Cavanna, F.

AU - Depalo, R.

AU - Menzel, M-L

AU - Aliotta, M.

AU - Anders, M.

AU - Bemmerer, D.

AU - Broggini, C.

AU - Bruno, C. G.

AU - Caciolli, A.

AU - Corvisiero, P.

AU - Davinson, T.

AU - di Leva, A.

AU - Elekes, Z.

AU - Ferraro, F.

AU - Formicola, A.

AU - Fueloep, Zs.

AU - Gervino, G.

AU - Guglielmetti, A.

AU - Gustavino, C.

AU - Gyuerky, Gy.

AU - Imbriani, G.

AU - Junker, M.

AU - Menegazzo, R.

AU - Prati, P.

AU - Alvarez, C. Rossi

AU - Scott, D. A.

AU - Somorjai, E.

AU - Straniero, O.

AU - Strieder, F.

AU - Szuecs, T.

AU - Trezzi, D.

PY - 2014/11/27

Y1 - 2014/11/27

N2 - The Ne-22(p, gamma)Na-23 reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle is active in asymptotic giant branch stars as well as in novae and contributes to the nucleosythesis of neon and sodium isotopes. In order to reduce the uncertainties in the predicted nucleosynthesis yields, new experimental efforts to measure the Ne-22(p, gamma)Na-23 cross section directly at the astrophysically relevant energies are needed. In the present work, a feasibility study for a Ne-22(p, gamma)Na-23 experiment at the Laboratory for Underground Nuclear Astrophysics (LUNA) 400 kV accelerator deep underground in the Gran Sasso laboratory, Italy, is reported. The ion-beam-induced.-ray background has been studied. The feasibility study led to the first observation of the E-p = 186 keV resonance in a direct experiment. An experimental lower limit of 0.12 x 10(-6) eV has been obtained for the resonance strength. Informed by the feasibility study, a dedicated experimental setup for the Ne-22(p, gamma)Na-23 experiment has been developed. The new setup has been characterized by a study of the temperature and pressure profiles. The beam heating effect that reduces the effective neon gas density due to the heating by the incident proton beam has been studied using the resonance scan technique, and the size of this effect has been determined for a neon gas target.

AB - The Ne-22(p, gamma)Na-23 reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle is active in asymptotic giant branch stars as well as in novae and contributes to the nucleosythesis of neon and sodium isotopes. In order to reduce the uncertainties in the predicted nucleosynthesis yields, new experimental efforts to measure the Ne-22(p, gamma)Na-23 cross section directly at the astrophysically relevant energies are needed. In the present work, a feasibility study for a Ne-22(p, gamma)Na-23 experiment at the Laboratory for Underground Nuclear Astrophysics (LUNA) 400 kV accelerator deep underground in the Gran Sasso laboratory, Italy, is reported. The ion-beam-induced.-ray background has been studied. The feasibility study led to the first observation of the E-p = 186 keV resonance in a direct experiment. An experimental lower limit of 0.12 x 10(-6) eV has been obtained for the resonance strength. Informed by the feasibility study, a dedicated experimental setup for the Ne-22(p, gamma)Na-23 experiment has been developed. The new setup has been characterized by a study of the temperature and pressure profiles. The beam heating effect that reduces the effective neon gas density due to the heating by the incident proton beam has been studied using the resonance scan technique, and the size of this effect has been determined for a neon gas target.

KW - THERMONUCLEAR REACTION-RATES

KW - LOW-ENERGY RESONANCES

KW - NUCLEAR ASTROPHYSICS

KW - NOVA NUCLEOSYNTHESIS

KW - GAS-TARGET

KW - AGB STARS

KW - LUNA

KW - CAPTURE

KW - BEAM

KW - ACCELERATOR

UR - http://www.scopus.com/inward/record.url?scp=84912143767&partnerID=8YFLogxK

U2 - 10.1140/epja/i2014-14179-5

DO - 10.1140/epja/i2014-14179-5

M3 - Article

AN - SCOPUS:84912143767

SN - 1434-6001

VL - 50

JO - The European Physical Journal A (EPJ A)

JF - The European Physical Journal A (EPJ A)

IS - 11

M1 - 179

ER -

A new study of the 22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance

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Edinburgh Nuclear Physics Group Consolidated Grant Proposal

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A new study of the 22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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Projects

Edinburgh Nuclear Physics Group Consolidated Grant Proposal

Cite this