22 results on '"Montanari, D."'
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2. Isospin Mixing in ^{80}Zr: From Finite to Zero Temperature
- Author
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Ceruti, S., Camera, F., Bracco, A., Avigo, R., Benzoni, G., Blasi, N., Bocchi, G., Bottoni, S., Brambilla, S., Crespi, F. C. L., Giaz, A., Leoni, S., Mentana, A., Million, B., Morales, A. I., Nicolini, R., Pellegri, L., Pullia, A., Riboldi, S., Wieland, O., Birkenbach, B., Bazzacco, D., Ciemala, M., Désesquelles, P., Eberth, J., Farnea, E., Görgen, A., Gottardo, A., Hess, H., Judson, D. S., Jungclaus, A., Kmiecik, M., Korten, W., Maj, A., Menegazzo, R., Mengoni, D., Michelagnoli, C., Modamio, V., Montanari, D., Myalski, S., Napoli, D., Quintana, B., Reiter, P., Recchia, F., Rosso, D., Sahin, E., Salsac, M. D., Söderström, P. -A., Stezowski, O., Theisen, Ch., Ur, C., Valiente-Dobón, J. J., Zieblinski, M., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM SNO), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Univ. Paris-Sud, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[PHYS]Physics [physics] ,Physics and Astronomy (all) ,GIANT-DIPOLE RESONANCE ,STATES ,NUCLEI ,SYMMETRY ,Nuclear Theory ,WIDTH ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment ,DECAY ,BREAKING ,RESTORATION - Abstract
International audience; The isospin mixing was deduced in the compound nucleus Zr-80 at an excitation energy of E* = 54 MeV from the gamma decay of the giant dipole resonance. The reaction Ca-40 + Ca-40 at E-beam = 136 MeV was used to form the compound nucleus in the isospin I = 0 channel, while the reaction Cl-37 + Ca-44 at E-beam = 95 MeV was used as the reference reaction. The. rays were detected with the AGATA demonstrator array coupled with LaBr3:Ce detectors. The temperature dependence of the isospin mixing was obtained and the zero-temperature value deduced. The isospin-symmetry-breaking correction delta(C) used for the Fermi superallowed transitions was extracted and found to be consistent with beta-decay data.
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- 2015
3. Isospin Mixing inZr80: From Finite to Zero Temperature
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Ceruti, S., primary, Camera, F., additional, Bracco, A., additional, Avigo, R., additional, Benzoni, G., additional, Blasi, N., additional, Bocchi, G., additional, Bottoni, S., additional, Brambilla, S., additional, Crespi, F. C. L., additional, Giaz, A., additional, Leoni, S., additional, Mentana, A., additional, Million, B., additional, Morales, A. I., additional, Nicolini, R., additional, Pellegri, L., additional, Pullia, A., additional, Riboldi, S., additional, Wieland, O., additional, Birkenbach, B., additional, Bazzacco, D., additional, Ciemala, M., additional, Désesquelles, P., additional, Eberth, J., additional, Farnea, E., additional, Görgen, A., additional, Gottardo, A., additional, Hess, H., additional, Judson, D. S., additional, Jungclaus, A., additional, Kmiecik, M., additional, Korten, W., additional, Maj, A., additional, Menegazzo, R., additional, Mengoni, D., additional, Michelagnoli, C., additional, Modamio, V., additional, Montanari, D., additional, Myalski, S., additional, Napoli, D., additional, Quintana, B., additional, Reiter, P., additional, Recchia, F., additional, Rosso, D., additional, Sahin, E., additional, Salsac, M. D., additional, Söderström, P.-A., additional, Stezowski, O., additional, Theisen, Ch., additional, Ur, C., additional, Valiente-Dobón, J. J., additional, and Zieblinski, M., additional
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- 2015
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4. Pathway for the Production of Neutron-Rich Isotopes around theN=126Shell Closure
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Watanabe, Y. X., primary, Kim, Y. H., additional, Jeong, S. C., additional, Hirayama, Y., additional, Imai, N., additional, Ishiyama, H., additional, Jung, H. S., additional, Miyatake, H., additional, Choi, S., additional, Song, J. S., additional, Clement, E., additional, de France, G., additional, Navin, A., additional, Rejmund, M., additional, Schmitt, C., additional, Pollarolo, G., additional, Corradi, L., additional, Fioretto, E., additional, Montanari, D., additional, Niikura, M., additional, Suzuki, D., additional, Nishibata, H., additional, and Takatsu, J., additional
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- 2015
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5. Neutron Pair Transfer inNi60+Sn116Far below the Coulomb Barrier
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Montanari, D., primary, Corradi, L., additional, Szilner, S., additional, Pollarolo, G., additional, Fioretto, E., additional, Montagnoli, G., additional, Scarlassara, F., additional, Stefanini, A. M., additional, Courtin, S., additional, Goasduff, A., additional, Haas, F., additional, Jelavić Malenica, D., additional, Michelagnoli, C., additional, Mijatović, T., additional, Soić, N., additional, Ur, C. A., additional, and Varga Pajtler, M., additional
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- 2014
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6. Fusion Hindrance for a Positive- Q -Value System Mg24+Si30
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Jiang, C. L., primary, Stefanini, A. M., additional, Esbensen, H., additional, Rehm, K. E., additional, Almaraz-Calderon, S., additional, Back, B. B., additional, Corradi, L., additional, Fioretto, E., additional, Montagnoli, G., additional, Scarlassara, F., additional, Montanari, D., additional, Courtin, S., additional, Bourgin, D., additional, Haas, F., additional, Goasduff, A., additional, Szilner, S., additional, and Mijatovic, T., additional
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- 2014
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7. Publisher’s Note: Lifetime Measurements of the Neutron-RichN=30IsotonesCa50andSc51: Orbital Dependence of Effective Charges in thefpShell [Phys. Rev. Lett.102, 242502 (2009)]
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Valiente-Dobón, J. J., primary, Mengoni, D., additional, Gadea, A., additional, Farnea, E., additional, Lenzi, S. M., additional, Lunardi, S., additional, Dewald, A., additional, Pissulla, Th., additional, Szilner, S., additional, Broda, R., additional, Recchia, F., additional, Algora, A., additional, Angus, L., additional, Bazzacco, D., additional, Benzoni, G., additional, Bizzeti, P. G., additional, Bizzeti-Sona, A. M., additional, Boutachkov, P., additional, Corradi, L., additional, Crespi, F., additional, de Angelis, G., additional, Fioretto, E., additional, Görgen, A., additional, Gorska, M., additional, Gottardo, A., additional, Grodner, E., additional, Guiot, B., additional, Howard, A., additional, Królas, W., additional, Leoni, S., additional, Mason, P., additional, Menegazzo, R., additional, Montanari, D., additional, Montagnoli, G., additional, Napoli, D. R., additional, Obertelli, A., additional, Pawłat, T., additional, Pollarolo, G., additional, Rubio, B., additional, Şahin, E., additional, Scarlassara, F., additional, Silvestri, R., additional, Stefanini, A. M., additional, Smith, J. F., additional, Steppenbeck, D., additional, Ur, C. A., additional, Wady, P. T., additional, Wrzesiński, J., additional, Maglione, E., additional, and Hamamoto, I., additional
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- 2009
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8. Lifetime Measurements of the Neutron-RichN=30IsotonesCa50andSc51: Orbital Dependence of Effective Charges in thefpShell
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Valiente-Dobón, J. J., primary, Mengoni, D., additional, Gadea, A., additional, Farnea, E., additional, Lenzi, S. M., additional, Lunardi, S., additional, Dewald, A., additional, Pissulla, Th., additional, Szilner, S., additional, Broda, R., additional, Recchia, F., additional, Algora, A., additional, Angus, L., additional, Bazzacco, D., additional, Benzoni, G., additional, Bizzeti, P. G., additional, Bizzeti-Sona, A. M., additional, Boutachkov, P., additional, Corradi, L., additional, Crespi, F., additional, de Angelis, G., additional, Fioretto, E., additional, Görgen, A., additional, Gorska, M., additional, Gottardo, A., additional, Grodner, E., additional, Guiot, B., additional, Howard, A., additional, Królas, W., additional, Leoni, S., additional, Mason, P., additional, Menegazzo, R., additional, Montanari, D., additional, Montagnoli, G., additional, Napoli, D. R., additional, Obertelli, A., additional, Pawłat, T., additional, Pollarolo, G., additional, Rubio, B., additional, Şahin, E., additional, Scarlassara, F., additional, Silvestri, R., additional, Stefanini, A. M., additional, Smith, J. F., additional, Steppenbeck, D., additional, Ur, C. A., additional, Wady, P. T., additional, Wrzesiński, J., additional, Maglione, E., additional, and Hamamoto, I., additional
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- 2009
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9. Probing the Order-to-Chaos Region in SuperdeformedTb151andPb196Nuclei with ContinuumγTransitions
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Leoni, S., primary, Benzoni, G., additional, Blasi, N., additional, Bracco, A., additional, Brambilla, S., additional, Camera, F., additional, Corsi, A., additional, Crespi, F. C. L., additional, Mason, P., additional, Million, B., additional, Montanari, D., additional, Pignanelli, M., additional, Vigezzi, E., additional, Wieland, O., additional, Matsuo, M., additional, Shimizu, Y. R., additional, Curien, D., additional, Duchêne, G., additional, Robin, J., additional, Bednarczyk, P., additional, Castoldi, M., additional, Herskind, B., additional, Kmiecik, M., additional, Maj, A., additional, Meczynski, W., additional, Styczen, J., additional, Zieblinski, M., additional, Zuber, K., additional, and Zucchiatti, A., additional
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- 2008
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10. Direct Measurement of theBe7Solar Neutrino Flux with 192 Days of Borexino Data
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Arpesella, C., primary, Back, H. O., additional, Balata, M., additional, Bellini, G., additional, Benziger, J., additional, Bonetti, S., additional, Brigatti, A., additional, Caccianiga, B., additional, Cadonati, L., additional, Calaprice, F., additional, Carraro, C., additional, Cecchet, G., additional, Chavarria, A., additional, Chen, M., additional, Dalnoki-Veress, F., additional, D’Angelo, D., additional, de Bari, A., additional, de Bellefon, A., additional, de Kerret, H., additional, Derbin, A., additional, Deutsch, M., additional, di Credico, A., additional, di Pietro, G., additional, Eisenstein, R., additional, Elisei, F., additional, Etenko, A., additional, Fernholz, R., additional, Fomenko, K., additional, Ford, R., additional, Franco, D., additional, Freudiger, B., additional, Galbiati, C., additional, Gatti, F., additional, Gazzana, S., additional, Giammarchi, M., additional, Giugni, D., additional, Goeger-Neff, M., additional, Goldbrunner, T., additional, Goretti, A., additional, Grieb, C., additional, Hagner, C., additional, Hampel, W., additional, Harding, E., additional, Hardy, S., additional, Hartman, F. X., additional, Hertrich, T., additional, Heusser, G., additional, Ianni, Aldo, additional, Ianni, Andrea, additional, Joyce, M., additional, Kiko, J., additional, Kirsten, T., additional, Kobychev, V., additional, Korga, G., additional, Korschinek, G., additional, Kryn, D., additional, Lagomarsino, V., additional, Lamarche, P., additional, Laubenstein, M., additional, Lendvai, C., additional, Leung, M., additional, Lewke, T., additional, Litvinovich, E., additional, Loer, B., additional, Lombardi, P., additional, Ludhova, L., additional, Machulin, I., additional, Malvezzi, S., additional, Manecki, S., additional, Maneira, J., additional, Maneschg, W., additional, Manno, I., additional, Manuzio, D., additional, Manuzio, G., additional, Martemianov, A., additional, Masetti, F., additional, Mazzucato, U., additional, McCarty, K., additional, McKinsey, D., additional, Meindl, Q., additional, Meroni, E., additional, Miramonti, L., additional, Misiaszek, M., additional, Montanari, D., additional, Monzani, M. E., additional, Muratova, V., additional, Musico, P., additional, Neder, H., additional, Nelson, A., additional, Niedermeier, L., additional, Oberauer, L., additional, Obolensky, M., additional, Orsini, M., additional, Ortica, F., additional, Pallavicini, M., additional, Papp, L., additional, Parmeggiano, S., additional, Perasso, L., additional, Pocar, A., additional, Raghavan, R. S., additional, Ranucci, G., additional, Rau, W., additional, Razeto, A., additional, Resconi, E., additional, Risso, P., additional, Romani, A., additional, Rountree, D., additional, Sabelnikov, A., additional, Saldanha, R., additional, Salvo, C., additional, Schimizzi, D., additional, Schönert, S., additional, Shutt, T., additional, Simgen, H., additional, Skorokhvatov, M., additional, Smirnov, O., additional, Sonnenschein, A., additional, Sotnikov, A., additional, Sukhotin, S., additional, Suvorov, Y., additional, Tartaglia, R., additional, Testera, G., additional, Vignaud, D., additional, Vitale, S., additional, Vogelaar, R. B., additional, von Feilitzsch, F., additional, von Hentig, R., additional, von Hentig, T., additional, Wojcik, M., additional, Wurm, M., additional, Zaimidoroga, O., additional, Zavatarelli, S., additional, and Zuzel, G., additional
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- 2008
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11. Neutron Pair Transfer in 60Ni+116Sn Far below the Coulomb Barrier.
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Montanari, D., Corradi, L., Szilner, S., Pollarolo, G., Fioretto, E., Montagnoli, G., Scarlassara, F., Stefanini, A. M., Courtin, S., Goasduff, A., Haas, F., Jelavić Malenica, D., Michelagnoli, C., Mijatović, T., Soić, N., Ur, C. A., and Varga Pajtler, M.
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COULOMB barriers (Nuclear fusion) , *PAIRING correlations (Nuclear physics) , *PAIR production , *HEAVY ions , *MAGNETIC spectrometer - Abstract
An excitation function of one- and two-neutron transfer channels for the 60Ni+116Sn system has been measured with the magnetic spectrometer PRISMA in a wide energy range, from the Coulomb barrier to far below it. The experimental transfer probabilities are well reproduced, for the first time with heavy ions, in absolute values and in slope by microscopic calculations which incorporate nucleon-nucleon pairing correlations. [ABSTRACT FROM AUTHOR]
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- 2014
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12. Neutron Pair Transfer in Ni 60 + Sn 116 Far below the Coulomb Barrier
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Montanari, D., Corradi, L., Szilner, S., Pollarolo, Giovanni, Fioretto, E., Montagnoli, G., Scarlassara, F., Stefanini, A. . M., Courtin, S., Goasduff, A., Haas, F., Jelavić Malenica, D., Michelagnoli, C., Mijatović, T., Soić, N., C. . A., Ur, and Varga Pajtler, M.
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13. Fusion Hindrance for a Positive- Q -Value System Mg 24 + Si 30
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Jiang, C. L., Stefanini, A. M., Esbensen, H., Rehm, K. E., Almaraz-Calderon, S., Back, B. B., Corradi, L., Fioretto, E., Montagnoli, G., Scarlassara, F., Montanari, D., Courtin, S., Bourgin, D., Haas, F., Goasduff, A., Szilner, S., and Mijatovic, T.
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14. Pathway for the Production of Neutron-Rich Isotopes around the N=126 Shell Closure.
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Watanabe, Y. X., Kim, Y. H., Jeong, S. C., Hirayama, Y., Imai, N., Ishiyama, H., Jung, H. S., Miyatake, H., Choi, S., Song, J. S., Clement, E., de France, G., Navin, A., Rejmund, M., Schmitt, C., Pollarolo, G., Corradi, L., Fioretto, E., Montanari, D., and Niikura, M.
- Subjects
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NUCLEAR cross sections , *NUCLEAR particle research , *EXOTIC nuclei , *ENERGY dissipation , *COLLISIONS (Nuclear physics) - Abstract
Absolute cross sections for isotopically identified products formed in multinucleon transfer in the 136Xe+198Pt system at ~8 MeV/nucleon are reported. The isotopic distributions obtained using a large acceptance spectrometer demonstrated the production of the "hard-to-reach" neutron-rich isotopes for Z<78 around the N=126 shell closure far from stability. The main contribution to the formation of these exotic nuclei is shown to arise in collisions with a small kinetic energy dissipation. The present experimental finding corroborates for the first time recent predictions that multinucleon transfer reactions would be the optimum method to populate and characterize neutron-rich isotopes around N=126 which are crucial for understanding both astrophysically relevant processes and the evolution of "magic" numbers far from stability. [ABSTRACT FROM AUTHOR]
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- 2015
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15. Fusion Hindrance for a Positive-Q-Value System 24Mg + 30Si.
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Jiang, C. L., Stefanini, A. M., Esbensen, H., Rehm, K. E., Almaraz-Calderon, S., Back, B. B., Corradi, L., Fioretto, E., Montagnoli, G., Scarlassara, F., Montanari, D., Courtin, S., Bourgin, D., Haas, F., Goasduff, A., Szilner, S., and Mijatovic, T.
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FUSION (Phase transformation) , *STELLAR evolution , *HEAVY ions , *EXTRAPOLATION , *OXYGEN , *CARBON - Abstract
Measurements of the excitation function for the fusion of 24Mg + 30Si (Q = 17.89 MeV)have been extended toward lower energies with respect to previous experimental data. The 5-factor maximum observed in this large, positive-Q-value system is the most pronounced among such systems studied thus far. The significance and the systematics of an S-factor maximum in systems with positive fusion Q values are discussed. This result would strongly impact the extrapolated cross sections and reaction rates in the carbon and oxygen burnings and, thus, the study of the history of stellar evolution. [ABSTRACT FROM AUTHOR]
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- 2014
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16. Neutron pair transfer in (60)Ni+(116)Sn far below the Coulomb barrier.
- Author
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Montanari D, Corradi L, Szilner S, Pollarolo G, Fioretto E, Montagnoli G, Scarlassara F, Stefanini AM, Courtin S, Goasduff A, Haas F, Jelavić Malenica D, Michelagnoli C, Mijatović T, Soić N, Ur CA, and Varga Pajtler M
- Abstract
An excitation function of one- and two-neutron transfer channels for the ^{60}Ni+^{116}Sn system has been measured with the magnetic spectrometer PRISMA in a wide energy range, from the Coulomb barrier to far below it. The experimental transfer probabilities are well reproduced, for the first time with heavy ions, in absolute values and in slope by microscopic calculations which incorporate nucleon-nucleon pairing correlations.
- Published
- 2014
- Full Text
- View/download PDF
17. Fusion hindrance for a positive-q-value system (24)Mg+(30)Si.
- Author
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Jiang CL, Stefanini AM, Esbensen H, Rehm KE, Almaraz-Calderon S, Back BB, Corradi L, Fioretto E, Montagnoli G, Scarlassara F, Montanari D, Courtin S, Bourgin D, Haas F, Goasduff A, Szilner S, and Mijatovic T
- Abstract
Measurements of the excitation function for the fusion of (24)Mg+(30)Si (Q=17.89 MeV)have been extended toward lower energies with respect to previous experimental data. The S-factor maximum observed in this large, positive-Q-value system is the most pronounced among such systems studied thus far. The significance and the systematics of an S-factor maximum in systems with positive fusion Q values are discussed. This result would strongly impact the extrapolated cross sections and reaction rates in the carbon and oxygen burnings and, thus, the study of the history of stellar evolution.
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- 2014
- Full Text
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18. First evidence of pep solar neutrinos by direct detection in Borexino.
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Bellini G, Benziger J, Bick D, Bonetti S, Bonfini G, Bravo D, Buizza Avanzini M, Caccianiga B, Cadonati L, Calaprice F, Carraro C, Cavalcante P, Chavarria A, Chepurnov A, D'Angelo D, Davini S, Derbin A, Etenko A, Fomenko K, Franco D, Galbiati C, Gazzana S, Ghiano C, Giammarchi M, Goeger-Neff M, Goretti A, Grandi L, Guardincerri E, Hardy S, Ianni A, Ianni A, Korablev D, Korga G, Koshio Y, Kryn D, Laubenstein M, Lewke T, Litvinovich E, Loer B, Lombardi F, Lombardi P, Ludhova L, Machulin I, Manecki S, Maneschg W, Manuzio G, Meindl Q, Meroni E, Miramonti L, Misiaszek M, Montanari D, Mosteiro P, Muratova V, Oberauer L, Obolensky M, Ortica F, Otis K, Pallavicini M, Papp L, Perasso L, Perasso S, Pocar A, Quirk J, Raghavan RS, Ranucci G, Razeto A, Re A, Romani A, Sabelnikov A, Saldanha R, Salvo C, Schönert S, Simgen H, Skorokhvatov M, Smirnov O, Sotnikov A, Sukhotin S, Suvorov Y, Tartaglia R, Testera G, Vignaud D, Vogelaar RB, von Feilitzsch F, Winter J, Wojcik M, Wright A, Wurm M, Xu J, Zaimidoroga O, Zavatarelli S, and Zuzel G
- Abstract
We observed, for the first time, solar neutrinos in the 1.0-1.5 MeV energy range. We determined the rate of pep solar neutrino interactions in Borexino to be 3.1±0.6{stat}±0.3{syst} counts/(day·100 ton). Assuming the pep neutrino flux predicted by the standard solar model, we obtained a constraint on the CNO solar neutrino interaction rate of <7.9 counts/(day·100 ton) (95% C.L.). The absence of the solar neutrino signal is disfavored at 99.97% C.L., while the absence of the pep signal is disfavored at 98% C.L. The necessary sensitivity was achieved by adopting data analysis techniques for the rejection of cosmogenic {11}C, the dominant background in the 1-2 MeV region. Assuming the Mikheyev-Smirnov-Wolfenstein large mixing angle solution to solar neutrino oscillations, these values correspond to solar neutrino fluxes of (1.6±0.3)×10{8} cm{-2} s^{-1} and <7.7×10{8} cm{-2} s{-1} (95% C.L.), respectively, in agreement with both the high and low metallicity standard solar models. These results represent the first direct evidence of the pep neutrino signal and the strongest constraint of the CNO solar neutrino flux to date.
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- 2012
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19. Precision measurement of the (7)Be solar neutrino interaction rate in Borexino.
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Bellini G, Benziger J, Bick D, Bonetti S, Bonfini G, Buizza Avanzini M, Caccianiga B, Cadonati L, Calaprice F, Carraro C, Cavalcante P, Chavarria A, D'Angelo D, Davini S, Derbin A, Etenko A, Fomenko K, Franco D, Galbiati C, Gazzana S, Ghiano C, Giammarchi M, Goeger-Neff M, Goretti A, Grandi L, Guardincerri E, Hardy S, Ianni A, Ianni A, Kobychev V, Korablev D, Korga G, Koshio Y, Kryn D, Laubenstein M, Lewke T, Litvinovich E, Loer B, Lombardi F, Lombardi P, Ludhova L, Machulin I, Manecki S, Maneschg W, Manuzio G, Meindl Q, Meroni E, Miramonti L, Misiaszek M, Montanari D, Mosteiro P, Muratova V, Oberauer L, Obolensky M, Ortica F, Pallavicini M, Papp L, Peña-Garay C, Perasso L, Perasso S, Pocar A, Raghavan RS, Ranucci G, Razeto A, Re A, Romani A, Sabelnikov A, Saldanha R, Salvo C, Schönert S, Simgen H, Skorokhvatov M, Smirnov O, Sotnikov A, Sukhotin S, Suvorov Y, Tartaglia R, Testera G, Vignaud D, Vogelaar RB, von Feilitzsch F, Winter J, Wojcik M, Wright A, Wurm M, Xu J, Zaimidoroga O, Zavatarelli S, and Zuzel G
- Abstract
The rate of neutrino-electron elastic scattering interactions from 862 keV (7)Be solar neutrinos in Borexino is determined to be 46.0±1.5(stat)(-1.6)(+1.5)(syst) counts/(day·100 ton). This corresponds to a ν(e)-equivalent (7)Be solar neutrino flux of (3.10±0.15)×10(9) cm(-2) s(-1) and, under the assumption of ν(e) transition to other active neutrino flavours, yields an electron neutrino survival probability of 0.51±0.07 at 862 keV. The no flavor change hypothesis is ruled out at 5.0 σ. A global solar neutrino analysis with free fluxes determines Φ(pp)=6.06(-0.06)(+0.02)×10(10) cm(-2) s(-1) and Φ(CNO)<1.3×10(9) cm(-2) s(-1) (95% C.L.). These results significantly improve the precision with which the Mikheyev-Smirnov-Wolfenstein large mixing angle neutrino oscillation model is experimentally tested at low energy.
- Published
- 2011
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20. Lifetime measurements of the neutron-rich N = 30 isotones 50Ca and 51Sc: orbital dependence of effective charges in the fp shell.
- Author
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Valiente-Dobón JJ, Mengoni D, Gadea A, Farnea E, Lenzi SM, Lunardi S, Dewald A, Pissulla T, Szilner S, Broda R, Recchia F, Algora A, Angus L, Bazzacco D, Benzoni G, Bizzeti PG, Bizzeti-Sona AM, Boutachkov P, Corradi L, Crespi F, de Angelis G, Fioretto E, Görgen A, Gorska M, Gottardo A, Grodner E, Guiot B, Howard A, Królas W, Leoni S, Mason P, Menegazzo R, Montanari D, Montagnoli G, Napoli DR, Obertelli A, Pawłat T, Pollarolo G, Rubio B, Sahin E, Scarlassara F, Silvestri R, Stefanini AM, Smith JF, Steppenbeck D, Ur CA, Wady PT, Wrzesiński J, Maglione E, and Hamamoto I
- Abstract
The lifetimes of the first excited states of the N = 30 isotones (50)Ca and (51)Sc have been determined using the Recoil Distance Doppler Shift method in combination with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This extends the lifetime knowledge beyond the f_{7/2} shell closure and allows us to derive the effective proton and neutron charges in the fp shell near the doubly magic nucleus (48)Ca, using large-scale, shell-model calculations. These results indicate an orbital dependence of the core polarization along the fp shell.
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- 2009
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21. Probing the order-to-chaos region in superdeformed 151Tb and 196Pb nuclei with continuum gamma transitions.
- Author
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Leoni S, Benzoni G, Blasi N, Bracco A, Brambilla S, Camera F, Corsi A, Crespi FC, Mason P, Million B, Montanari D, Pignanelli M, Vigezzi E, Wieland O, Matsuo M, Shimizu YR, Curien D, Duchêne G, Robin J, Bednarczyk P, Castoldi M, Herskind B, Kmiecik M, Maj A, Meczynski W, Styczen J, Zieblinski M, Zuber K, and Zucchiatti A
- Abstract
The gamma decay associated with the warm rotation of the superdeformed nuclei 151Tb and 196Pb has been measured with the EUROBALL IV array. Several independent quantities provide a stringent test of the population and decay dynamics in the superdeformed well. A Monte Carlo simulation of the gamma decay based on microscopic calculations gives remarkable agreement with the data only assuming a large enhancement of the B(E1) strength for 1-2 MeV gamma rays, which may be related to the evidence for octupole vibrations in both mass regions.
- Published
- 2008
- Full Text
- View/download PDF
22. Direct measurement of the 7Be solar neutrino flux with 192 days of borexino data.
- Author
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Arpesella C, Back HO, Balata M, Bellini G, Benziger J, Bonetti S, Brigatti A, Caccianiga B, Cadonati L, Calaprice F, Carraro C, Cecchet G, Chavarria A, Chen M, Dalnoki-Veress F, D'Angelo D, de Bari A, de Bellefon A, de Kerret H, Derbin A, Deutsch M, di Credico A, di Pietro G, Eisenstein R, Elisei F, Etenko A, Fernholz R, Fomenko K, Ford R, Franco D, Freudiger B, Galbiati C, Gatti F, Gazzana S, Giammarchi M, Giugni D, Goeger-Neff M, Goldbrunner T, Goretti A, Grieb C, Hagner C, Hampel W, Harding E, Hardy S, Hartman FX, Hertrich T, Heusser G, Ianni A, Ianni A, Joyce M, Kiko J, Kirsten T, Kobychev V, Korga G, Korschinek G, Kryn D, Lagomarsino V, Lamarche P, Laubenstein M, Lendvai C, Leung M, Lewke T, Litvinovich E, Loer B, Lombardi P, Ludhova L, Machulin I, Malvezzi S, Manecki S, Maneira J, Maneschg W, Manno I, Manuzio D, Manuzio G, Martemianov A, Masetti F, Mazzucato U, McCarty K, McKinsey D, Meindl Q, Meroni E, Miramonti L, Misiaszek M, Montanari D, Monzani ME, Muratova V, Musico P, Neder H, Nelson A, Niedermeier L, Oberauer L, Obolensky M, Orsini M, Ortica F, Pallavicini M, Papp L, Parmeggiano S, Perasso L, Pocar A, Raghavan RS, Ranucci G, Rau W, Razeto A, Resconi E, Risso P, Romani A, Rountree D, Sabelnikov A, Saldanha R, Salvo C, Schimizzi D, Schönert S, Shutt T, Simgen H, Skorokhvatov M, Smirnov O, Sonnenschein A, Sotnikov A, Sukhotin S, Suvorov Y, Tartaglia R, Testera G, Vignaud D, Vitale S, Vogelaar RB, von Feilitzsch F, von Hentig R, von Hentig T, Wojcik M, Wurm M, Zaimidoroga O, Zavatarelli S, and Zuzel G
- Abstract
We report the direct measurement of the 7Be solar neutrino signal rate performed with the Borexino detector at the Laboratori Nazionali del Gran Sasso. The interaction rate of the 0.862 MeV 7Be neutrinos is 49+/-3stat+/-4syst counts/(day.100 ton). The hypothesis of no oscillation for 7Be solar neutrinos is inconsistent with our measurement at the 4sigma C.L. Our result is the first direct measurement of the survival probability for solar nu(e) in the transition region between matter-enhanced and vacuum-driven oscillations. The measurement improves the experimental determination of the flux of 7Be, pp, and CNO solar nu(e), and the limit on the effective neutrino magnetic moment using solar neutrinos.
- Published
- 2008
- Full Text
- View/download PDF
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