A new study of the22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance
| العنوان: | A new study of the22Ne(p, γ)23Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance |
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| المؤلفون: | P. Corvisiero, G. Gervino, Thomas Davinson, Rosanna Depalo, Douglas Scott, A. Formicola, C. Rossi Alvarez, C. Gustavino, M. Junker, C. G. Bruno, Gianluca Imbriani, Oscar Straniero, Marialuisa Aliotta, Davide Trezzi, Tamás Szücs, Paolo Prati, E. Somorjai, Antonio Caciolli, A. Guglielmetti, M. L. Menzel, Zs. Fülöp, Carlo Broggini, Daniel Bemmerer, Gy. Gyürky, A. Di Leva, R. Menegazzo, F. Cavanna, F. Ferraro, Frank Strieder, M. Anders, Z. Elekes |
| المساهمون: | 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, Antonino, Elekes, Z., Ferraro, F., Formicola, A., Fülöp, Z. s., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, G. y., Imbriani, Gianluca, Junker, M., Menegazzo, R., Prati, P., Rossi Alvarez, C., Scott, D. A., Somorjai, E., Straniero, O., Strieder, F., Szücs, T., Trezzi, D. |
| بيانات النشر: | Springer New York LLC, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Proton, Hydrogen, astrofisica nucleare, fisica, Resonance, chemistry.chemical_element, fisica underground, Nuclear physics, Neon, chemistry, fisica sperimentale, Astrophysics - Solar and Stellar Astrophysics, Nucleosynthesis, Nuclear astrophysics, Nuclear fusion, Nuclear Experiment, Beam (structure), Nuclear Physics |
| الوصف: | The $^{22}$Ne(p,$\gamma$)$^{23}$Na 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 $^{22}$Ne(p,$\gamma$)$^{23}$Na cross section directly at the astrophysically relevant energies are needed. In the present work, a feasibility study for a $^{22}$Ne(p,$\gamma$)$^{23}$Na 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 $\gamma$-ray background has been studied. The feasibility study led to the first observation of the $E_{\rm p}$ = 186\,keV resonance in a direct experiment. An experimental lower limit of 0.12\,$\times$\,10$^{-6}$\,eV has been obtained for the resonance strength. Informed by the feasibility study, a dedicated experimental setup for the $^{22}$Ne(p,$\gamma$)$^{23}$Na 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. Comment: Minor errors corrected; final version |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b30552c7fbf2664227001b5ac7468b5 http://hdl.handle.net/11577/3259420 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....8b30552c7fbf2664227001b5ac7468b5 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |