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925 results on '"Somorjai, E."'

201. Revision of the (15)N(p, gamma)(16)O reaction rate and oxygen abundance in H-burning zones RID B-2262-2008

Author

Caciolli, A, Mazzocchi, C, Capogrosso, V, Bemmerer, D, Broggini, C, Corvisiero, P, Costantini, H, Elekes, Z, Formicola, A, Fulop, Z, Gervino, G, Guglielmetti, A, Gustavino, C, Gyurky, G, Imbriani, G, Junker, M, Lemut, A, Marta, M, Menegazzo, R, Palmerini, S, Prati, P, Roca, V, Rolfs, C, Alvarez, Cr, Somorjai, E, Straniero, O, Strieder, F, Terrasi, F, Trautvetter, Hp, and Vomiero, A

Published
2011

202. Recent results on the 11B(p,α)8Be reaction studied through the THM: S(E)-factor and electron screening measurements

Author

Lamia, L., Spitaleri, C., Cherubini, S., Crucilla, V., Gulino, M., La Cognata, M., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Sergi, M. L., Tumino, A., Burjan, V., Hons, Z., Kroha, V., Mrazek, J., Carlin, N., Munhoz, M. G., Del Santo, M. G., Souza, F. A., De Toledo, A. S., Kubono, S., Wakabayashi, Y., Yamaguchi, H., Kiss, G. G., Somorjai, E., Li, C., Wen, Q., Zhou, S. -H., Mukhamedzhanoz, A., Tabacaru, G., and Rolfs, C.

Published
2011

203. The 25Mg(p,g)Al reaction at low astrophysical energies

Author

Luna, Collaboration, Strieder, F., Limata, B., Formicola, A., Imbriani, G., Junker, M., Bemmerer, D., Best, A., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Dileva, A., Elekes, Z., Fülöp, Zs, Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy, Lemut, A., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Oscar Straniero, Terrasi, F., and Trautvetter, H. P.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

In the present work we report on a new measurement of resonance strengths in the reaction 25Mg(p,gamma)26Al at E_cm= 92 and 189 keV. This study was performed at the LUNA facility in the Gran Sasso underground laboratory using a 4pi BGO summing crystal. For the first time the 92 keV resonance was directly observed and a resonance strength omega-gamma=(2.9+/-0.6)x10E-10 eV was determined. Additionally, the gamma-ray branchings and strength of the 189 keV resonance were studied with a high resolution HPGe detector yielding an omega-gamma value in agreement with the BGO measurement, but 20% larger compared to previous works., Comment: 6 pages, 4 figures, accepted for publication in Physics Letters B

Published
2011
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204. The N14(p, gamma)O15 reaction studied with a composite germanium detector

Author

Marta, M., Formicola, A., Bemmerer, D., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Elekes, Z., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy., Imbriani, G., Junker, M., Lemut, A., Limata, B., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., and Vomiero, A.

Subjects
Nuclear and High Energy Physics
Published
2011

205. Erratum: Constraining the S factor of 15N(p,γ)16O at astrophysical energies

Author

Leblanc, P. J., Imbriani, G., Görres, J., Junker, M., Azuma, R., Beard, M., Bemmerer, D., Best, A., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Couder, M., Deboer, R., Elekes, Z., Falahat, S., Formicola, A., Fülöp, Z. s., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Gyürky, G. y., Käppeler, F., Kontos, A., Kuntz, R., Leiste, H., Lemut, A., Li, Q., Limata, B., Marta, M., Mazzocchi, C., Menegazzo, R., O’Brien, S., Palumbo, A., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Stech, E., Straniero, O., Strieder, F., Tan, W., Terrasi, F., Trautvetter, H. P., Uberseder, E., and Wiescher, M.

Subjects
modifica errore riscontrato in precedente articolo pubblicato dalla stessa rivista
Published
2011

206. Direct measurement of the 2H(a,g)6Li cross section at energies of astrophysical interest

Author

Bellini, A., Caciolli, A., Mazzocchi, C., Capogrosso, V., Bemmerer, D., Broggini, C., Corvisiero, P., Costantini, H., Elekes, Z., Formicola, A., Fulop, Z., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Gyurki, G., Imbriani, G., Junker, M., Lemut, A., Marta, M., Menegazzo, R., Palmerini, S., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Straniero, O., Somorjai, E., Strieder, F., Terrasi, F., Trautvetter, H. P., and Vomiero, A.

Published
2011

207. The N-14(p,gamma)O-15 reaction studied with a composite germanium detector

Author

Marta, M., Formicola, A., Bemmerer, D., Broggni, C., Caciolli, A., Costantini, H., Corvisiero, P., Elekes, Z., Fulop, Z. s., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Gyurky, G. y., Imbriani, G., Junker, M., Lemut, A., Limata, B., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Salvo, C., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., and Vomiero, A.

Subjects
NUCLEAR ASTROPHYSICS, STELLAR EVOLUTION
Published
2011

208. Cd110,116(α,α)Cd110,116 elastic scattering and systematic investigation of elastic α scattering cross sections along the Z=48 isotopic and N=62 isotonic chains

Author

Kiss, G.G., Mohr, P., Fülöp, Z., Gyürky, G., Elekes, Z., Farkas, J., Somorjai, E., Yalcin, C., Galaviz, D., Güray, R.T., Ã-Zkan, N., and Görres, J.

Abstract

The elastic scattering cross sections for the reactions Cd110,116(α,α)Cd110,116 at energies above and below the Coulomb barrier are presented to provide a sensitive test for the α-nucleus optical potential parameter sets. Additional constraints for the optical potential are taken from the analysis of elastic scattering excitation functions at backward angles which are available in literature. Moreover, the variation of the elastic α scattering cross sections along the Z=48 isotopic and N=62 isotonic chain is investigated by the study of the ratios of the Cd106,110,116(α,α)Cd106,110,116 scattering cross sections at E cm15.6and18.8 MeV and the ratio of the Cd110(α,α)Cd110 and Sn112(α,α)Sn112 reaction cross sections at Ecm18.8 MeV, respectively. These ratios are sensitive probes for the α-nucleus optical potential parametrizations. The potentials under study are a basic prerequisite for the prediction of α-induced reaction cross sections (e.g., for the calculation of stellar reaction rates in the astrophysical p or γ process). © 2011 American Physical Society., This work was supported by the EUROGENESIS research program, by the Hungarian Office of the National Scientific Research Fund (OTKA), Grants No. NN83261 and No. K068801, by the European Research Council, Grant No. 203175, and by the Joint Institute for Nuclear Astrophysics (NSF Grant No. PHY0822648). G.G.K. and D.G. acknowledge the support of the Spanish Interministerial Commission of Science and Technology, under Project No. FPA2005-02379, and the Ministry of Education and Science (MEC) Consolider, Project No. CSD2007-00042. G.G. acknowledges support from the Bolyai grant. D.G. acknowledges support from the Spanish Ministry of Science Juan de la Cierva grant. This work was also supported by the Scientific and Technological Research Council of Turkey (TUBITAK), Grants No. 108T508 (TBAG1001) and No. 109T585 (under the EUROGENESIS research program). Fruitful discussions with M. Avrigeanu are gratefully acknowledged.

Published
2011

209. Erratum: Constraining the S factor of N15(p,γ)O16 at astrophysical energies (Physical Review C - Nuclear Physics (2010) 82 (055804) DOI: 10.1103/PhysRevC.82.055804)

Author

Leblanc, P. J., Imbriani, G., Görres, J., Junker, M., Azuma, R., Beard, M., Bemmerer, D., Best, A., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Couder, M., Deboer, R., Elekes, Z., Falahat, S., Formicola, A., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy., Käppeler, F., Kontos, A., Kuntz, R., Leiste, H., Lemut, A., Li, Q., Limata, B., Marta, M., Mazzocchi, C., Menegazzo, R., O'Brien, S., Palumbo, A., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Stech, E., Straniero, O., Strieder, F., Tan, W., Terrasi, F., Trautvetter, H. P., Uberseder, E., and Wiescher, M.

Subjects
Nuclear and High Energy Physics
Published
2011

210. Nuclear astrophysics deep underground: the LUNA experiment

Author

Trezzi, D., Caciolli, A., Bemmerer, D., Broggini, C., Corvisiero, P., Costantini, H., Elekes, Z., Formicola, A., Fulop, Z., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Gyurki, G., Imbriani, G., Junker, M., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Straniero, O., Somorjai, E., Strieder, F., Terrasi, F., and Trautvetter, H. P.

Subjects
Astrofisica nucleare, laboratori del Gran Sasso
Published
2011

211. Cd-110,Cd-116(Alpha,Alpha)Cd-110,Cd-116 Elastic Scattering And Systematic Investigation Of Elastic A Scattering Cross Sections Along The Z=48 Isotopic And N=62 Isotonic Chains

Author

Kiss, G. G., Mohr, P., Fueloep, Zs., Gyuerky, Gy, Elekes, Z., Farkas, J., Somorjai, E., Yalcin, C., Galaviz, D., Guray, R. T., Ozkan, N., and Goerres, J.

Abstract

The elastic scattering cross sections for the reactions Cd-110,Cd-116(alpha,alpha)Cd-110,Cd-116 at energies above and below the Coulomb barrier are presented to provide a sensitive test for the alpha-nucleus optical potential parameter sets. Additional constraints for the optical potential are taken from the analysis of elastic scattering excitation functions at backward angles which are available in literature. Moreover, the variation of the elastic alpha scattering cross sections along the Z = 48 isotopic and N = 62 isotonic chain is investigated by the study of the ratios of the Cd-106,Cd-110,Cd-116(alpha,alpha)Cd-106,Cd-110,Cd-116 scattering cross sections at E-cm approximate to 15.6 and 18.8 MeV and the ratio of the Cd-110(alpha,alpha)Cd-110 and Sn-112(alpha,alpha)Sn-112 reaction cross sections at E-cm approximate to 18.8 MeV, respectively. These ratios are sensitive probes for the alpha-nucleus optical potential parametrizations. The potentials under study are a basic prerequisite for the prediction of alpha-induced reaction cross sections (e.g., for the calculation of stellar reaction rates in the astrophysical p or gamma process).

Published
2011

213. Trojan Horse Method: recent results in nuclear astrophysics

Author

Spitaleri, C, primary, Lamia, L, additional, Santo, M Gimenez Del, additional, Burjan, V, additional, Carlin, N, additional, Li, Chengbo, additional, Cherubini, S, additional, Crucilla, V, additional, Gulino, M, additional, Hons, Z, additional, Kroha, V, additional, Irgaziev, B, additional, La Cognata, M, additional, Mrazek, J, additional, Mukhamedzhanov, M, additional, Munhoz, M G, additional, Palmerini, S, additional, Pizzone, R G, additional, Puglia, M R, additional, Rapisarda, G G, additional, Romano, S, additional, Sergi, L, additional, Zhou, Shu-Hua, additional, Somorjai, E, additional, Souza, F A, additional, Tabacaru, G, additional, de Toledo, A Szanto, additional, Tumino, A, additional, Wen, Qungang, additional, Wakabayashi, Y, additional, and Yamaguchi, H, additional

Published
2015
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217. THM determination of the 65 keV resonance strength intervening in the 17O(p,α)14N reaction rate

Author

Sergi, M. L., primary, Spitaleri, C., additional, Burjan, S. V., additional, Cherubini, S., additional, Coc, A., additional, Gulino, M., additional, Hammache, F., additional, Hons, Z., additional, Irgaziev, B., additional, Kiss, G. G., additional, Kroha, V., additional, La Cognata, M., additional, Lamia, L., additional, Mukhamedzhanov, A., additional, Pizzone, R. G., additional, Puglia, S. M. R., additional, Rapisarda, G. G., additional, Romano, S., additional, de Séréville, N., additional, Somorjai, E., additional, and Tumino, A., additional

Published
2015
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220. Alpha-Induced Reaction Cross Section Measurements On Eu-151 For The Astrophysical Gamma-Process

Author

Gyuerky, Gy, Elekes, Z., Farkas, J., Fueloep, Zs, Halasz, Z., Kiss, G. G., Somorjai, E., Szuecs, T., Guray, R. T., Ozkan, N., Yalcin, C., and Rauscher, T.

Abstract

In order to extend the experimental database relevant for the astrophysical gamma-process towards the unexplored heavier mass region, the cross sections of the Eu-151(alpha, gamma)Tb-155 and Eu-151 (alpha, n)Tb-154 reactions have been measured at low energies between 12 and 17 MeV using the activation technique. The results are compared with the predictions of statistical model calculations and it is found that the calculations overestimate the cross sections by about a factor of 2. A sensitivity analysis shows that this discrepancy is caused by the inadequate description of the alpha+nucleus channel. A factor of 2 reduction of the reaction rate of Eu-151(alpha, gamma)Tb-155 in gamma-process network calculations with respect to theoretical rates using the optical potential by McFadden and Satchler (1966 Nucl. Phys. 84 177) is recommended.

Published
2010

221. Determining reaction cross sections via characteristic X-ray detection: ��-induced reactions on 169Tm for the astrophysical �� -process

Author

Kiss, G. G., Rauscher, T., Sz��cs, T., Kert��sz, Zs., F��l��p, Zs., Gy��rky, Gy., Fr��hlich, C., Farkas, J., Elekes, Z., and Somorjai, E.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex)
Abstract

The cross sections of the 169Tm(��, ��)173Lu and 169Tm(��,n)172Lu reactions have been measured first time using a new method, by detecting the characteristic X-ray radiation following the electron capturedecay of 172,173Lu. Despite the relatively long half-life of the reaction products (T1/2 = 500 and 6.7 days, respectively) it was possible to measure the cross section of the 169Tm(��,��)173Lu reaction close to the Gamow window (T9 = 3.5 GK), between Ec.m. = 13.16 and 17.08 MeV. The 169Tm(��,n)172Lu reaction cross section was measured from Ec.m. = 11.21 MeV up to Ec.m. = 17.08 MeV. The experimental results have been compared to theoretical predictions

Published
2010
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223. An actively vetoed Clover {Mathematical expression} -detector for nuclear astrophysics at LUNA

Author

Szücs, T., Bemmerer, D., Broggini, C., Caciolli, A., Confortola, F., Corvisiero, P., Elekes, Z., Formicola, A., Fülöp, Z., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Gyürky, G. y., Imbriani, G., Junker, M., Lemut, A., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H. P.

Subjects
underground physics, Nuclear astrophysics
Published
2010

224. A new study of low-energy (p, gamma) resonances on Magnesium isotopes

Author

Limata, B., Strieder, F., Formicola, A., Imbriani, G., Junker, M., Becker, H. W., Bemmerer, D., Best, A., Bonetti, R., Broggni, C., Caciolli, A., Costantini, H., Corvisiero, P., Dileva, A., Elekes, Z., Fulop, Z. s., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Gyurky, G. y., Lemut, A., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Salvo, C., Somorjai, E., Straniero, O., Terrasi, F., and Trautvetter, H. P.

Subjects
Nuclear astrophysics
Published
2010

225. An actively vetoed Clover γ-detector for nuclear astrophysicsat LUNA

Author

Luna, Collaboration, Szucs, T., Bemmerer, D., Broggini, C., Caciolli, A., Confortola, F., Corvisiero, P., Elekes, Z., Formicola, A., Fulop, Zs, Gervino, G., Guglielmetti, A., Gustavino, C., Gyurky, Gy, Imbriani, G., Junker, M., Lemut, A., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Oscar Straniero, Strieder, F., Terrasi, F., Trautvetter, H. P., T., Szuc, D., Bemmerer, C., Broggini, A., Caciolli, F., Confortola, P., Corvisiero, Z., Eleke, A., Formicola, F¨ul¨op, Z. s., G., Gervino, A., Guglielmetti, C., Gustavino, Gy¨urky, G. y., Imbriani, Gianluca, M., Junker, A., Lemut, M., Marta, C., Mazzocchi, R., Menegazzo, P., Prati, Roca, Vincenzo, C., Rolf, C., Rossi Alvarez, E., Somorjai, O., Straniero, F., Strieder, F., Terrasi, and H. P., Trautvetter

Subjects
Physics, Nuclear and High Energy Physics, Clover type HP Germaniun detector, Physics::Instrumentation and Detectors, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Underground Laboratories, Semiconductor detector, Nuclear physics, Nuclear astrophysics, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Nuclear Astrophysic
Abstract

An escape-suppressed, composite high-purity germanium detector of the Clover type has been installed at the Laboratory for Underground Nuclear Astrophysics (LUNA) facility, deep underground in the Gran Sasso Laboratory, Italy. The laboratory gamma-ray background of the Clover detector has been studied underground at LUNA and, for comparison, also in an overground laboratory. Spectra have been recorded both for the single segments and for the virtual detector formed by online addition of all four segments. The effect of the escape-suppression shield has been studied as well. Despite their generally higher intrinsic background, escape-suppressed detectors are found to be well suited for underground nuclear astrophysics studies. As an example for the advantage of using a composite detector deep underground, the weak ground state branching of the Ep = 223 keV resonance in the 24Mg(p,gamma)25Al reaction is determined with improved precision., 8 pages, 6 figures, 3 tables; as accepted by Eur. Phys. J. A

Published
2010

226. Constraining the S factor of N15(p,γ)O16 at astrophysical energies

Author

Leblanc, P. J., Imbriani, G., Görres, J., Junker, M., Azuma, R., Beard, M., Bemmerer, D., Best, A., Broggini, Carlo, Caciolli, A., Corvisiero, P., Costantini, H., Couder, M., Deboer, R., Elekes, Z., Falahat, S., Formicola, A., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy., Käppeler, F., Kontos, A., Kuntz, R., Leiste, H., Lemut, A., Li, Q., Limata, B., Marta, M., Mazzocchi, C., Menegazzo, R., O'Brien, S., Palumbo, A., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Stech, E., Straniero, O., Strieder, F., Tan, W., Terrasi, F., Trautvetter, H. P., Uberseder, E., and Wiescher, M.

Subjects
Nuclear and High Energy Physics
Published
2010

227. An actively vetoed Clover Gamma-detector for nuclear astrophysics at LUNA

Author

Szücs, T., Bemmerer, D., Broggini, C., Caciolli, A., Confortola, F., Corvisiero, Pietro, Elekes, Z., Formicola, A., Fulop, Z. S., Gervino, G., Guglielmetti, A., Gustavino, C., Gyurky, G. Y., Imbriani, G., Junker, M., Lemut, Alberto, Marta, M., Mazzocchi, C., Menegazzo, R., Prati, Paolo, Roca, V., Rolfs, C., ROSSI ALVAREZ, C., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, AND H. P.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::Instrumentation and Methods for Astrophysics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

An escape-suppressed, composite high-purity germanium detector of the Clover type has been installed at the Laboratory for Underground Nuclear Astrophysics (LUNA) facility, deep underground in the Gran Sasso Laboratory, Italy. The laboratory gamma-ray background of the Clover detector has been studied underground at LUNA and, for comparison, also in an overground laboratory. Spectra have been recorded both for the single segments and for the virtual detector formed by online addition of all four segments. The effect of the escape-suppression shield has been studied as well. Despite their generally higher intrinsic background, escape-suppressed detectors are found to be well suited for underground nuclear astrophysics studies. As an example for the advantage of using a composite detector deep underground, the weak ground state branching of the Ep = 223 keV resonance in the 24Mg(p,gamma)25Al reaction is determined with improved precision.

Published
2010

229. Improved results on the extraction of 11B(p,alpha _0)8Be S(E)-factor via the Trojan Horse Method

Author

Lamia, L, Spitaleri, C, Romano, S, Carlin, N, Cherubini, Silvio, LI CHENG BO, Crucillà, V, DEL SANTO, M. G., Gulino, M, Kiss, G. G., Kroha, V, Kubono, S, LA COGNATA, M, Mukhamedzhanov, A, Pizzone, R. G., Puglia, S. M. R., WEN QUN GANG, Rapisarda, G. G., Sergi, M. L., ZHOU SHU HUA, Somorjai, E, Souza, F, SZANTO DE TOLEDO, A, Tabacaru, G, Tudisco, S, Tumino, A, Wakabayashi, Y, and Yamaguchi, H.

Published
2010

230. Indurect measurement of 17 O(p,a)14N cfoss section at ultra-low energy

Author

Sergi, M. L., Spitaleri, C, Coc, A., Mukhamedzhanov, A., Burjan, V., Cherubini, Silvio, Crucillá, V., Gulino, M., Hammache, F., Hons, V. Z., Irgaziev, B., Kiss, G., Kroha, V., LA COGNATA, M., Lamia, L., Pizzone, R. G., Puglia, Sebastiana, Rapisarda, G. G., Romano, S., DE SÉRÉVILLE, N., Somorjai, E., and Tumino, S. TUDISCO AND A.

Published
2010

231. Alpha-Induced Reactions For The Astrophysical P-Process: The Case Of Eu-151

Author

Gyuerky, G. Y., Elekes, Z., Farkas, J., Fueloep, Z. S., Kiss, G. G., Somorjai, E., Szuecs, T., Guray, R. T., Ozkan, N., Yalcin, C., and Rauscher, T.

Abstract

The cross sections of Eu-151(alpha, gamma)Tb-155 and Eu-151(alpha,n)Tb-154 reactions have been measured with the activation method. Some aspects of the measurement are presented here to illustrate the requirements of experimental techniques needed to obtain nuclear data for the astrophysical p-process nucleosynthesis. Preliminary cross section results are also presented and compared with the predictions of statistical model calculations.

Published
2010

232. Updated 14N(p,gamma)15O data from LUNA

Author

Marta, M., Bemmerer, D., Caciolli, A., Bonetti, R., Broggini, C., Confortola, F., Corvisiero, P., Costantini, H., Elekes, Z., Formicola, A., Fulop, Z., Gervino, G., Guglielmetti, A., Gustavino, C., Gyurky, G., Imbriani, G., Junker, M., Lemut, A., Limata, B., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Alvarez, C. R., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H. P.

Subjects
LUNA, TiN solid target, Clover detector, Astrophysics::Solar and Stellar Astrophysics, Nuclear astrophysics, CNO cycle
Abstract

The 14N(p,gamma)15O reaction controls the rate of the hydrogen burning CNO cycle. By detecting solar CNO neutrinos (e.g. in Borexino, SNO+) one can in principle measure directly the carbon and nitrogen abundance at the center of the Sun. However this requires more precise nuclear data. Updated experimental results on capture to various excited states (as well as to the ground state) in 15O are shown, together with improved branching ratios obtained for the E_p = 278 keV resonance.

Published
2010

233. New high accuracy measurement of the 17O(p,α)14N reaction rate at astrophysical temperatures

Author

L. Sergi, M., Spitaleri, C., La Cognata, M., Coc, A., Mukhamedzhanov, A., V. Burjan, S., Cherubini, S., Crucillá, V., Gulino, M., Hammache, F., Hons, Z., Irgaziev, B., G. Kiss, G., Kroha, V., Lamia, L., G. Pizzone, R., M. R. Puglia, S., G. Rapisarda, G., Romano, S., De Séréville, N., Somorjai, E., Tudisco, S., Tumino1, A., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Institut de Physique Nucléaire d'Orsay (IPNO)

Subjects
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Astrophysics::High Energy Astrophysical Phenomena, Nuclear Experiment, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
Abstract

The 17O(p,α)14N reaction is of fundamental relevance in several astrophysical scenarios, such as novae, asymptotic giant branch nucleosynthesis, and γ-ray astronomy. We report on the indirect measurement of the 17O(p,α)14N reaction bare-nucleus cross section in the low-energy region. In particular, the two resonances at ERc.m.=65 keV and ERc.m.=183 keV, which dominate the reaction rate inside the Gamow window, have been observed, and the strength of the 65 keV resonance has been deduced. The reaction rate determination and the comparison with the results of the previous measurements are also discussed.

Published
2010

235. Indirect measurement of 17O(p,α)14N cross section at ultra-low energies

Author

Sergi, M. L., Spitaleri, C, Coc, A, Mukhamedzhanov, A, Burjan, V, Cherubini, Silvio, Crucillá, V, Gulino, M, Hammache, F, Hons, V. Z., Irgaziev, B, Kiss, G, Kroha, V, LA COGNATA, M, Lamia, Livio, Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S, DE SÉRÉVILLE, N, Somorjai, E, Tudisco, S, and Tumino, A.

Published
2010

236. Direct measurement of the 15N(p,γ)16O total cross section at novae energies

Author

Bemmerer, D., Caciolli, A., Costantini, H., Bonetti, R., Broggni, C., Confortola, F., Corvisiero, P., Elekes, Z., Formicola, A., Fulop, Z. s., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Gyurky, G. y., Junker, M., Limata, B., Marta, M., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Straniero, O., and Strieder, F.

Subjects
novae, nuclesynthesis, Nuclear Astrophysics
Published
2009

237. Measurements Of Proton-Induced Reaction Cross Sections On Te-120 For The Astrophysical P Process

Author

Guray, R. T., Ozkan, N., Yalcin, C., Palumbo, A., deBoer, R., Gorres, J., Leblanc, P. J., O'Brien, S., Strandberg, E., Tan, W. P., Wiescher, M., Fulop, Zs., Somorjai, E., Lee, H. Y., and Greene, J. P.

Abstract

The total cross sections for the Te-120(p,gamma)I-121 and Te-120(p, n)I-120 reactions have been measured by the activation method in the effective center-of-mass energies 2.47 MeV

Published
2009

238. Improvements on the study of 17O(p,!)14N reaction via the Trojan Horse Method at astrophysical energies

Author

Sergi, M. L., Spitaleri, C, Coc, A., Mukhamedzhanov, A., Tang, X., Brian, S., Bucher, B., Burian, Cherubini, Silvio, Couder, M., Crucilla', V., Davies, P., Deboer, R., Gulino, M., Hammache, F., Hons, V. Z., Irgaziev, B., Kiss, G., Kroha, V., Lacognata, M., Lamia, L., Lamm, L., Ma, C., Mrazek, J., Notani, M., Pizzone, R. G., Puglia, Sebastiana, Rapisarda, G. G., Roberson, D., Romano, Stefano, Desereville, N., Somorjai, E., Tan, W., Tudisco, S., and Tumino, A.

Published
2009

239. Nuclear Proton-proton Elastic Scattering via the Trojan Horse Method

Author

Tumino, A., Spitaleri, C, Mukhamedzhanov, A. ), Rapisarda, Gg, Campajola, L, Cherubini, S., Crucilla, V, Elekes, Z, Fulop, Z, Gialanella, L, Gulino, M. ., Gyurky, G., Kiss, Gg, Cognata, La, Lamia, M., Ordine, L, Pizzone, A., R. G., Puglia, Sebastiana, Romano, S, Sergi, Ml, and Somorjai, E.

Published
2009

241. 10B(p,a)7Be reaction S(E)-factor at the Gamow energy extracted via the THM

Author

Puglia, S. M. R., Romano, S., Delsanto, M. G., Lamia, L., Spitaleri, C, Carlin, N., Cherubini, Silvio, Gulino, M., Kroha, V., Kubono, S., Lacognata, M., Li, C., Pizzone, R. G., Munhoz, M. G., Qungang, W., Rapisarda, G. G., Sergi, M. L., Somorjai, E., Souza, F., SZANTO DE TOLEDO, A., Tudisco, S., Tumino, A., Wakabayashi, Y., and Yamaguchi, H.

Published
2009

242. 10B(p, alpha)7Be reaction S(E)-factor at the Gamow energy extracted via the THM

Author

Puglia, Sebastiana, Romano, S., Delsanto, M. G., Lamia, L., Spitaleri, C, Carlin, N., Cherubini, Silvio, Gulino, M., Kroha, V., Kubono, S., Lacognata, M., Li, C., Pizzone, R. G., Munhoz, M. G., Qungang, W., Rapisarda, G. G., Sergi, M. L., Somorjai, E., Souza, F., SZANTO DE TOLEDO, A., Tudisco, S., Tumino, A., Wakabayashi, Y., and Yamaguchi, H.

Published
2009

243. IMPROVED RESULTS ON THE EZTRACTION OF 11B8P,A)8BE AND 10B(P,A)7BE S(E)-FACTOR THROUGH THE INDIRECT TROJAN HORSE METHOD

Author

Lamia, L., Spitaleri, C, Romano, Stefano, Puglia, Sebastiana, GIMENEZ DEL SANTO, M., Carlin, N., Cherubini, Silvio, Crucilla', V., GAMEIRO MUNHOZ, M., Gulino, M., Kiss, G., Kroha, V., Kubono, S., LA COGNATA, M., Li, C., Mukhamedzhanov, A., Pizzone, R. G., Qungang, Wen, Rapisarda, G. G., Sergi, M. L., Somorjai, E., Souza, F. A., SZANTO DE TOLEDO, A., Tabacaru, G., Tudisco, S., Tumino, A., Wakabayashi, Y., and Yamaguchi, H.

Published
2009

244. State of the art for the 11B(p,!)8Be reaction studied through the Trojan Horse

Author

Lamia, L., Romano, S., Puglia, S. M. R., Delsanto, M. G., Spitaleri, C, Carlin, N., Cherubini, Silvio, Crucilla', V., Kiss, M. GULINO G., Kroha, V., Kubono, S., Lacognata, M., CHENG BO LI, Mukhamedzhanov, A., Pizzone, R. G., QUN GANG WEN, Rapisarda, G. G., Sergi, M. L., Somorjai, E., Souza, F., Szantodetoledo, A., Tabacaru, G., Tudisco, S., Tumino, A., Wakabayashi, Y., Yamaguchi, H., and Shu, Huazhou

Published
2009

245. Study of reaction 17O(p,alpha)14N via the Trojan Horse Method for application to 17O nucleosynthesis

Author

Sergi, M. L., Spitaleri, C., Coc, A., Mukhamedzhanov, A., Burian, V., Cherubini, S., Crucillá, V., Gulino, M., Hammache, F., Hons, V. Z., Irgaziev, B., Kiss, G., Kroha, V., La Cognata, M., Lamia, L., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., De Sereville, N., Somorjai, E., Tudisco, S., Tumino, A., CSNSM AN, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire d'Orsay (IPNO), and Hadrossek, Christine

Subjects
Stars: nucleosynthesis, [PHYS.ASTR.SR] Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Nuclear Physics: Indirect methods, [SDU.ASTR.SR] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Stars: classical Novae, Nuclear Physics: cross section measurements, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
Abstract

The 17O(p,alpha )14N is one of the most important reaction to be studied in order to get more information about the fate of 17O in different astrophysical scenarios. We report on the indirect measurement of 17O(p,alpha )14N reaction at energies below 300 keV by using the Trojan Horse Method. The experimental approach and the preliminary data of such investigation will be discussed.

Published
2009

246. Direct measurement of the N-15(p,gamma)O-16 total cross section at novae energies

Author

Bemmerer, D, Caciolli, Antonio, Bonetti, R, Broggini, C, Confortola, F, Corvisiero, P, Costantini, H, Elekes, Z, Formicola, A, Fulop, Z, Gervino, G, Guglielmetti, A, Gustavino, C, Gyurky, G, Junker, M, Limata, B, Marta, M, Menegazzo, R, Prati, P, Roca, V, Rolfs, C, Alvarez, Cr, Somorjai, E, and Straniero, O.

Published
2009

247. State of the art for the 11B(p,!)8Be reaction studied through the Trojan Horse Method: recent results

Author

Lamia, L., Romano, Stefano, Puglia, Sebastiana, Delsanto, M. G., Spitaleri, C, Carlin, N., Cherubini, Silvio, Crucillà, V., Kiss, M. GULINO G., Kroha, V., Kubono, S., Lacognata, M., CHENG BO LI, Mukhamedzhanov, A., Pizzone, R. G., QUN GANG WEN, Rapisarda, G. G., Sergi, M. L., Somorjai, E., Souza, F., Szantodetoledo, A., Tabacaru, G., Tudisco, S., Tumino, A., Wakabayashi, Y., Yamaguchi, H., and Shu, Huazhou

Published
2009

248. Ultra-sensitive in-beam gamma-ray spectroscopy for nuclear astrophysics at LUNA

Author

Caciolli, A., Agostino, L., Bemmerer, D., Confortola, F., Costantini, Heide, Formicola, A., Gyurky, G. Y., Bezzon, P., Bonetti, R., Broggini, C., Corvisiero, Pietro, Elekes, Z., Fulop, Z. S., Gervino, G., Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Laubenstein, M., Lemut, Alberto, Limata, B., Lozza, V., Marta, M., Menegazzo, R., Prati, Paolo, Roca, V., Rolfs, C., ROSSI ALVAREZ, C., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, AND H. P.

Published
2009

249. Astrophysical S-Factor For Alpha-Capture Of In-113 In The P-Process Energy Range

Author

Yalcin, C., Gueray, R. T., Oezkan, N., Kutlu, S., Gyuerky, Gy., Farkas, J., Kiss, G. G., Fueloep, Zs., Rauscher, T., and Somorjai, E.

Abstract

The cross sections of In-113(alpha, gamma)Sb-117 and In-113(alpha,n)Sb-116 reactions have been measured using the activation method. The experiments were carried out at the ATOMKI cyclotron accelerator in the center of mass energy range from 8.7 to 13.7 MeV. Astrophysical S-factors have been calculated, and preliminary results are compared With statistical model predictions.

Published
2009

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