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1. Excitations of one-valence-proton, one-valence-neutron nucleus 210Bi from cold-neutron capture

Author

Cieplicka-Oryńczak, N., primary, Fornal, B., additional, Leoni, S., additional, Bazzacco, D., additional, Blanc, A., additional, Bocchi, G., additional, Bottoni, S., additional, de France, G., additional, Jentschel, M., additional, Köster, U., additional, Mutti, P., additional, Simpson, G., additional, Soldner, T., additional, Szpak, B., additional, Ur, C., additional, and Urban, W., additional

Published
2015
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2. Excitations of One-valence-proton, One-valence-neutron Nucleus 210Bi from Cold-neutron Capture.

Author

Cieplicka-Oryńczak, N., Fornal, B., Leoni, S., Bazzacco, D., Blanc, A., Bocchi, G., Bottoni, S., de France, G., Jentschel, M., Köster, U., Mutti, P., Simpson, G., Soldner, T., Szpak, B., Ur, C., and Urban, W.

Subjects
NEUTRON-proton interactions, NEUTRON capture, VALENCE (Chemistry), ATOMIC number, NUCLEAR shell theory
Abstract

The low-spin structure of one-proton, one-neutron 210Bi nucleus was investigated in cold-neutron capture reaction on 209Bi. Theγ -coincidence measurements were performed with use of EXILL array consisted of 16 HPGe detectors. The experimental results were compared to shell-model calculations involving valence particles excitations. The 210Bi nucleus offers the potential to test the effective proton-neutron interactions because most of the states should arise from the proton-neutron excitations. Additionally, it was discovered that a few states should come from the couplings of valence particles to the 3- octupole vibration in 208Pb which provides also the possibility of testing the calculations involving the core excitations. [ABSTRACT FROM AUTHOR]

Published
2015
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3. Lifetime measurements of high-lying short lived states in [sup 69]As

Author

Matejska-Minda, M., primary, Bednarczyk, P., additional, Fornal, B., additional, Ciemała, M., additional, Kmiecik, M., additional, Krzysiek, M., additional, Maj, A., additional, Męczyński, W., additional, Myalski, S., additional, Styczén, J., additional, Ziębliński, M., additional, de Angelis, G., additional, Huyuk, T., additional, Michelagnoli, C., additional, Sahin, E., additional, Aydin, S., additional, Farnea, E., additional, Menegazzo, R., additional, Recchia, F., additional, Ur, C. A., additional, Brambilla, S., additional, Leoni, S., additional, Montanari, D., additional, Jaworski, G., additional, Palacz, M., additional, and Wadsworth, R., additional

Published
2012
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4. Measurement of isospin mixing in [sup 80]Zr[sup ∗] at finite temperature

Author

Corsi, A., primary, Wieland, O., additional, Barlini, S., additional, Kravchuk, V. L., additional, Bracco, A., additional, Camera, F., additional, Crespi, F. C. L., additional, Giaz, A., additional, Leoni, S., additional, Nicolini, R., additional, Vandone, V., additional, Benzoni, G., additional, Blasi, N., additional, Brambilla, S., additional, Million, B., additional, Montanari, D., additional, Bardelli, L., additional, Bini, M., additional, Casini, G., additional, Nannini, A., additional, Pasquali, G., additional, Poggi, G., additional, Cinausero, M., additional, Degerlier, M., additional, Gramegna, F., additional, Marchi, T., additional, Baiocco, G., additional, Bruno, M., additional, D’Agostino, M., additional, Morelli, L., additional, Vannini, G., additional, Ciemala, M., additional, Kmiecik, M., additional, Maj, A., additional, Mazurek, K., additional, Meczynski, W., additional, Myalski, S., additional, Ordine, A., additional, Demetriou, Paraskevi, additional, Julin, Rauno, additional, and Harissopulos, Sotirios, additional

Published
2011
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5. Reaction Dynamics And Nuclear Structure Via Deep Inelastic Collisions With Heavy-Ions: Search For Particle-Vibration Couplings in [sup 49]Ca

Author

Montanari, D., primary, Leoni, S., additional, Benzoni, G., additional, Blasi, N., additional, Bocchi, G., additional, Bracco, A., additional, Brambilla, S., additional, Camera, F., additional, Corsi, A., additional, Crespi, F. C. L., additional, Million, B., additional, Nicolini, R., additional, Wieland, O., additional, Corradi, L., additional, de Angelis, G., additional, Vedova, F. Della, additional, Fioretto, E., additional, Gadea, A., additional, Guiot, B., additional, Napoli, D. R., additional, Orlandi, R., additional, Recchia, F., additional, Silvestri, R., additional, Stefanini, A. M., additional, Singh, R. P., additional, Szilner, S., additional, Valiente-Dobon, J. J., additional, Bazzacco, D., additional, Farnea, E., additional, Lenzi, S. M., additional, Lunardi, S., additional, Mason, P., additional, Mengoni, D., additional, Montagnoli, G., additional, Scarlassara, F., additional, Ur, C., additional, Bianco, G. Lo, additional, Zucchiatti, A., additional, Kmiecik, M., additional, Maj, A., additional, Meczynski, W., additional, Pollarolo, G., additional, Demetriou, Paraskevi, additional, Julin, Rauno, additional, and Harissopulos, Sotirios, additional

Published
2011
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6. Population Of Neutron Rich Nuclei Around [sup 48]Ca With Deep Inelastic Collisions

Author

Montanari, D., primary, Leoni, S., additional, Benzoni, G., additional, Blasi, N., additional, Bracco, A., additional, Brambilla, S., additional, Camera, F., additional, Corsi, A., additional, Crespi, F. C. L., additional, Million, B., additional, Nicolini, R., additional, Wieland, O., additional, Corradi, L., additional, de Angelis, G., additional, Della Vedova, F., additional, Fioretto, E., additional, Gadea, A., additional, Guiot, B., additional, Napoli, D. R., additional, Orlandi, R., additional, Recchia, F., additional, Silvestri, R., additional, Stefanini, A. M., additional, Singh, R. P., additional, Szilner, S., additional, Valiente-Dobon, J. J., additional, Bazzacco, D., additional, Farnea, E., additional, Lenzi, S. M., additional, Lunardi, S., additional, Mason, P., additional, Mengon, D., additional, Montagnoli, G., additional, Scarlassara, F., additional, Ur, C., additional, Lo Bianco, G., additional, Zucchiatti, A., additional, Kmiecik, M., additional, Maj, A., additional, Meczynski, W., additional, Pollarolo, G., additional, Milin, Matko, additional, Niksic, Tamara, additional, Szilner, Suzana, additional, and Vretenar, Dario, additional

Published
2009
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7. Structure of N≥126 nuclei produced in fragmentation of [sup 238]U

Author

Al-Dahan, N., primary, Podolyák, Zs., additional, Regan, P. H., additional, Steer, S. J., additional, Alkhomashi, N., additional, Bacelar, A. M. Denis, additional, Górska, M., additional, Pietri, S. B., additional, Gelletly, W., additional, Walker, P. M., additional, Farrelly, G., additional, Morales, A. I., additional, Deo, A. Y., additional, Cullen, I. J., additional, Gerl, J., additional, Domingo-Pardo, C., additional, Verma, S., additional, Swan, T., additional, Wollersheim, H. J., additional, Bruce, A. M., additional, Lalkovski, S., additional, Benlliure, J., additional, Algora, A., additional, Boutachkov, P., additional, Bracco, A., additional, Calore, E., additional, Casarejos, E., additional, Detistov, P., additional, Dombrádi, Z., additional, Doncel, M., additional, Farinon, F., additional, Geissel, H., additional, Goel, N., additional, Grebosz, J., additional, Hoischen, R., additional, Kojouharov, I., additional, Leoni, S., additional, Molina, F., additional, Montanari, D., additional, Musumarra, A., additional, Nicolini, R., additional, Napoli, D. R., additional, Nociforo, C., additional, Rubio, B., additional, Prochazka, A., additional, Rudolph, D., additional, Strmen, P., additional, Szarka, I., additional, Valiente-Dobon, J. J., additional, Weick, H., additional, Jolie, Jan, additional, Zilges, Andreas, additional, Warr, Nigel, additional, and Blazhev, Andrey, additional

Published
2009
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8. [sup 67]As-[sup 67]Se mirror pair spectroscopy

Author

Wiedemann, K. T., primary, Medina, N. H., additional, de Angelis, G., additional, Orlandi, R., additional, Bracco, A., additional, Carpenter, M., additional, Chiara, C. J., additional, Vedova, F. Della, additional, Farnea, E., additional, Gadea, A., additional, Greene, J., additional, Lenzi, S. M., additional, Leoni, S., additional, Lister, C. J., additional, Lunardi, S., additional, Mărginean, N., additional, Napoli, D. R., additional, Singh, B. S. Nara, additional, Pechenaya, O. L., additional, Reviol, W., additional, Sahin, E., additional, Sarantites, D. G., additional, Seweryniak, D., additional, Tonev, D., additional, Ur, C. A., additional, Valiente-Dobón, J. J., additional, Wadsworth, R., additional, Zhu, S., additional, Guimaraes, Valdir, additional, Oliveira, José R. B., additional, Macario, Kita C. D., additional, and Genezini, Frederico A., additional

Published
2009
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9. Studies of Neutron-Deficient Nuclei Near the Z = 82 Shell Closure via Cold Fusion Reactions

Author

Carpenter, M. P., primary, Kondev, F. G., additional, Janssens, R. V. F., additional, Seweryniak, D., additional, Khoo, T. L., additional, Lauritsen, T., additional, Lister, C. J., additional, Zhu, S., additional, Camera, F., additional, Bracco, A., additional, Million, B., additional, Leoni, S., additional, Jenkins, D. G., additional, Wadsworth, R., additional, Rehm, K. Ernst, additional, Back, Birger B., additional, Esbensen, Henning, additional, and Lister, C.J. (Kim), additional

Published
2009
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10. Study of multi-nucleon transfer reactions with light nuclei

Author

Benzoni, G., primary, Montanari, D., additional, Bracco, A., additional, Blasi, N., additional, Camera, F., additional, Crespi, F. C. L., additional, Corsi, A., additional, Leoni, S., additional, Million, B., additional, Nicolini, R., additional, Wieland, O., additional, Zalite, A., additional, Zocca, F., additional, Azaiez, F., additional, Franchoo, S., additional, Stefan, I., additional, Ibrahim, F., additional, Verney, D., additional, Battacharyya, S., additional, De France, G., additional, Navin, A., additional, Rejmund, M., additional, Corradi, L., additional, de Angelis, G., additional, Gadea, A., additional, Stefanini, A. M., additional, Valiente-Dobón, J. J., additional, Farnea, E., additional, Lunardi, S., additional, Mason, P., additional, Montagnoli, G., additional, Scarlassara, F., additional, Szilner, S., additional, Pollarolo, G., additional, Demetriou, P., additional, Julin, R., additional, and Harissopulos, S. V., additional

Published
2008
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12. Lifetime measurements using the CLARA-PRISMA setup around the [sup 48]Ca doubly-magic nucleus.

Author

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, T., additional, Szilner, S., additional, Stefanini, A. M., additional, Broda, R., 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, Howard, A., additional, Królas, W., additional, Leoni, S., additional, Mason, P., additional, Montanari, D., additional, Montagnoli, G., additional, Napoli, D. R., additional, Obertelli, A., additional, Pawłat, T., additional, Recchia, F., additional, Algora, A., additional, Rubio, B., additional, Sahin, E., additional, Scarlassara, F., additional, Smith, J. F., additional, Steppenbeck, D., additional, Ur, C. A., additional, Wady, P. T., additional, Wrzesiński, J., additional, Boztosun, Ismail, additional, and Balantekin, A. B., additional

Published
2008
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13. B(E1) strengths and isospin symmetry in [sup 67]As and [sup 67]Se

Author

Orlandi, R., primary, de Angelis, G., additional, Vedova, F. Della, additional, Gadea, A., additional, Napoli, D. R., additional, Recchia, F., additional, Valiente-Doboń, J. J., additional, Mărginean, N., additional, Wiedemann, K. T., additional, Sahin, E., additional, Bracco, A., additional, Leoni, S., additional, Tonev, D., additional, Wadsworth, R., additional, Singh, B. S. Nara, additional, Sarantites, D. G., additional, Reviol, W., additional, Chiara, C. J., additional, Pechenaya, O., additional, Lister, C. J., additional, Carpenter, M., additional, Greene, J., additional, Sewerinyak, D., additional, Zhu, S., additional, Ferreira, Lídia S., additional, and Arumugan, Paramasivan, additional

Published
2007
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15. Measurement of isospin mixing in 80Zr* at finite temperature.

Author

Corsi, A., Wieland, O., Barlini, S., Kravchuk, V. L., Bracco, A., Camera, F., Crespi, F. C. L., Giaz, A., Leoni, S., Nicolini, R., Vandone, V., Benzoni, G., Blasi, N., Brambilla, S., Million, B., Montanari, D., Bardelli, L., Bini, M., Casini, G., and Nannini, A.

Subjects
ISOBARIC spin, PHYSICAL measurements, TEMPERATURE, COLLISIONS (Nuclear physics), NUCLEAR fusion, NUCLEAR reactions, RADIOACTIVE decay
Abstract

Isospin mixing induced by Coulomb interaction has been measured in the compound nucleus Z = N = 40 80Zr at T∼2 MeV produced in a fusion-evaporation reaction. The observable sensitive to the isospin purity of the compound nucleus is the Giant Dipole Resonance γ decay. The degree of mixing of the compound nucleus has been obtained via Statistical Model analysis of the measured γ spectrum. [ABSTRACT FROM AUTHOR]

Published
2011
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16. Quasi-elastic reactions : a survey on recent results.

Author

Szilner, S., Corradi, L., Ur, C. A., Pollarolo, G., Stefanini, A. M., Beghini, S., Courtin, S., Farnea, E., Fioretto, E., Gadea, A., Haas, F., Jelavić-Malenica, D., Lebhertz, D., Lenzi, S. M., Leoni, S., Lunardi, S., Marginean, N. M., Marginean, R., Mason, P., and Mengoni, D.

Subjects
SPECTROMETERS, SPECTRUM analysis instruments, NUCLEAR physics, NUCLEAR structure, ANALYTICAL mechanics
Abstract

Binary reactions at energies close to the Coulomb barrier received recently a significant boost thanks to the advent of the large solid angle magnetic spectrometer PRISMA coupled to the γ array CLARA. In the present paper different aspects of the recent results of nuclear structure and reaction dynamics will be presented, focusing more closely on the reaction mechanism. [ABSTRACT FROM AUTHOR]

Published
2010
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17. Population Of Neutron Rich Nuclei Around 48Ca With Deep Inelastic Collisions.

Author

Montanari, D., Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Camera, F., Corsi, A., Crespi, F. C. L., Million, B., Nicolini, R., Wieland, O., Corradi, L., de Angelis, G., Della Vedova, F., Fioretto, E., Gadea, A., Guiot, B., Napoli, D. R., and Orlandi, R.

Subjects
*NUCLEAR reactions, *NEUTRONS, *DEEP inelastic collisions, *MAGNETIC spectrometer, *MONTE Carlo method, *SIMULATION methods & models
Abstract

The reaction 48Ca+64Ni has been studied in the deep inelastic regime at approximately 6 MeV/A, by the CLARA-PRISMA setup. Angular distributions of the reaction cross sections have been obtained for the most intense reaction products, taking into account the response function of the magnetic spectrometer. The response of PRISMA has been calculated making use of a MonteCarlo simulation of the transport of the ions in the spectrometer, starting from known events distributions. For the one-nucleon transfer channels, the experimental data are in good agreement with predictions from a semiclassical multi-nucleon transfer model. [ABSTRACT FROM AUTHOR]

Published
2009
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18. 67As-67Se mirror pair spectroscopy.

Author

Wiedemann, K. T., Medina, N. H., de Angelis, G., Orlandi, R., Bracco, A., Carpenter, M., Chiara, C. J., Vedova, F. Della, Farnea, E., Gadea, A., Greene, J., Lenzi, S. M., Leoni, S., Lister, C. J., Lunardi, S., Mărginean, N., Napoli, D. R., Singh, B. S. Nara, Pechenaya, O. L., and Reviol, W.

Subjects
PROTONS, MIRROR nuclei, PARTICLES (Nuclear physics), NUCLEAR fusion, CONSTITUTION of matter, NUCLEAR physics
Abstract

This work focus on the electromagnetic decay properties of the heaviest known mirror pair 67As and 67Se, produced in the fusion evaporation reaction 32S+40Ca, with a E = 90 MeV beam provided by the ATLAS accelerator at Argonne National Laboratory. The high selectivity required to investigate these proton-rich nuclei was achieved with the concurrent employment of Gammasphere, Neutron-Shell, and Microball. The full array allowed to obtain the level scheme of the 67Se nucleus up to 5.56 MeV, and 5 new transitions were assigned to the known 67As level-scheme. The level spin and parities were assigned using the ADO analysis and symmetry arguments. [ABSTRACT FROM AUTHOR]

Published
2009
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19. B(E1) strengths and isospin symmetry in 67As and 67Se.

Author

Orlandi, R., de Angelis, G., Vedova, F. Della, Gadea, A., Napoli, D. R., Recchia, F., Valiente-Doboń, J. J., Mărginean, N., Wiedemann, K. T., Sahin, E., Bracco, A., Leoni, S., Tonev, D., Wadsworth, R., Singh, B. S. Nara, Sarantites, D. G., Reviol, W., Chiara, C. J., Pechenaya, O., and Lister, C. J.

Subjects
SPECTROSCOPIC imaging, SYMMETRY (Physics), CONTROLLED fusion, COMPOUND nucleus, GAMMASPHERE
Abstract

In a recent experiment at Argonne National Laboratory, new spectroscopic information was obtained for the mirror pair 67As and 67Se via the measurement of the lifetime of analogue 9/2I+ excited states. The nuclei of interest were populated via the fusion evaporation reaction of 32S on 40Ca, and selected by the combination of Gammasphere, Microball and the Neutron Wall arrays. The mirror B(E1) strengths were measured via the centroid shift method in analogue E1 transitions in 67As and 67Se. These findings are significant in determining the extent of conservation of isospin symmetry. [ABSTRACT FROM AUTHOR]

Published
2007
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20. In-beam γ spectroscopy using DIC with a radioactive Ne beam.

Author

Benzoni, G., Azaiez, F., Leoni, S., Battacharyya, S., Borcea, R., Bracco, A., Corradi, L., Curien, D., De France, G., Dombradi, Zs., Fioretto, E., Franchoo, S., Grevy, S., Ibrahim, F., Iulian, S., Mukherjee, G., Navin, A., Pollarolo, G., Redon, N., and Regan, P. H.

Subjects
RADIOACTIVE nuclear beams, PARTICLE beams, NEON, SPECTROMETERS, PARTICLES (Nuclear physics), NUCLEAR fragmentation
Abstract

The preferred production mechanisms used to investigate the region of light nuclei, such as O, Ne and F, have been transfer reactions and, more recently, two-step fragmentation. Multi-nucleon transfer reactions can be an important complementary tool to populate this mass region. Deep-inelastic and multi-nucleon transfer reactions have been largely used to study heavier systems, however no information is yet available regarding the effectiveness of these reaction mechanisms going towards lighter nuclei. In this proceeding we present promising preliminary results from an experiment performed with a radioactive 24Ne beam from SPIRAL facility at GANIL using the VAMOS spectrometer in conjunction with the EXOGAM array. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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21. Light Charged Particles Emission and the Giant Dipole Resonance in Highly Excited Ce Nucleus Formed in Reactions with Different Mass Asymmetries.

Author

Barlini, S., Kravchuk, V. L., Wieland, O., Bracco, A., Gramegna, F., Airoldi, A., Benzoni, G., Blasi, N., Brambilla, S., Brekiesz, M., Bruno, M., Camera, F., Casini, G., Chiari, M., D'Agostino, M., De Sanctis, J., Geraci, E., Kmiecik, M., Lanchais, A., and Leoni, S.

Subjects
MAGNETIC dipoles, CESIUM, COMPOUND nucleus, NUCLEAR reactions, NUCLEAR physics, PARTICLES (Nuclear physics), NEUTRON resonance
Abstract

Recent measurements have been performed at the National Laboratoty of Legnaro using mass-symmetric (400, 500 MeV 64Ni + 68Zn) and mass-asymmetric (250 MeV 16O + 116Sn) entrance channel reactions to form 132Ce compound nucleus at different excitation energies (E*=150, 200 and 200 MeV, respectively). The decay of the composite system has been followed studying the γ-rays and Light Charged Particles (LCP) spectra emitted in coincidence with the Evaporation Residues (ER). In this way the emission mechanism of the LCP, depending on the mass-asymmetry at the entrance channel and on the projectile energy, and the results of the Full Width Half-Maximum (FWHM) of the Giant Dipole Resonance as a function of the nuclear temperature have been studied. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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23. Evidence of the wobbling mode

Author

Odegård, S. W., primary, Hagemann, G. B., additional, Jensen, D. R., additional, Bergström, M., additional, Herskind, B., additional, Sletten, G., additional, Törmänen, S., additional, Wilson, J. N., additional, Tjøm, P. O., additional, Hamamoto, I., additional, Spohr, K., additional, Hübel, H., additional, Görgen, A., additional, Schönwasser, G., additional, Bracco, A., additional, Leoni, S., additional, Maj, A., additional, Petrache, C. M., additional, Bednarczyk, P., additional, and Curien, D., additional

Published
2002
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24. Search For Hyperdeformation In Xe Nuclei.

Author

Hansen, C. Rønn, Hagemann, G. B., Herskind, B., Jensen, D. R., Sletten, G., Wilson, J. N., Ødegård, S., Bringel, P., Engelhardt, C., Hübel, H., Neusser, A., Singh, A. K., Benzoni, G., Bracco, A., Camera, F., Leoni, S., Maj, A., Byrski, Th., Curien, D., and Bednarczyk, P.

Subjects
GAMMASPHERE, GAMMA ray detectors, NUCLEAR shapes, XENON, NOBLE gases, FISSION gases, NUCLEAR reactions
Abstract

Two experiments to identify hyperdeformation in Xe-nuclei have been made using the reaction 82Se(48Ca,xn)130-xXe, the first one with the EUROBALL-IV array equipped with a BGO calorimeter and the second one with the Gammasphere array. A bombarding energy of 195 MeV was used with the VIVITRON and 206 MeV with the ATLAS accelerator. No discrete hyperdeformed bands have been identified, but a ridge structure with 4 h2/J ∼ 0.048 MeV corresponding to a very large deformation was observed. A fluctuation analysis revealed that these ridges are composed of more than 10 rotational bands with >= 5 transitions each. Seven and four discrete bands extending from I ∼ 20 to I ∼ 60 have been identified in 125Xe and in 126Xe respectively, with a ΔEγ of 100 – 120 keV. These bands are most probably related to a potential energy minimum at [variant_greek_epsilon] ∼ 0.35 and a small γ-deformation predicted by Ultimate Crancker calculations. The transition quadrupole moments, crossing frequencies and alignments observed in the bands compare very well with those expected for this minimum. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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25. A Study of the Jacobi Shape Transition in Light, Fast Rotating Nuclei with the EUROBALL IV, HECTOR and EUCLIDES Arrays.

Author

Maj, A., Kmiecik, M., Brekiesz, M., Grbosz, J., Mczyski, W., Stycze, J., Zibliski, M., Zuber, K., Bracco, A., Camera, F., Benzoni, G., Million, B., Blasi, N., Brambilla, S., Leoni, S., Pignanelli, M., Wieland, O., Airoldi, A., Herskind, B., and Bednarczyk, P.

Subjects
PHYSICS, JACOBI identity, LOW energy electron diffraction, TOPOLOGICAL algebras
Abstract

The high-energy and discrete γ-ray spectra, as well as the charged particle angular distribution have been measured in the reaction 105 MeV 18O+28Si using the EUROBALL IV, HECTOR and EUCLIDES arrays in order to investigate the predicted Jacobi shape transition in light nuclei. A comparison of the GDR line shape data with the predictions of the thermal shape fluctuation model, based on the most recent rotating liquid drop LSD calculations, shows evidence for such Jacobi shape transition in hot, rapidly rotating 46Ti. The found narrow low-energy component in the GDR line shape is interpreted as the consequence both of the elongated shape and of the Coriolis effect. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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26. Chaotic Dynamics in Warm Rotating Nuclei.

Author

Matsuo, M., Vigezzi, E., Leoni, S., Bracco, A., Benzoni, G., Døssing, T., Herskind, B., Hagemann, G. B., Lopez-martens, A., and Khoo, T. L.

Subjects
NUCLEAR shell theory, QUANTUM theory, ROTATIONAL motion, PHYSICS research, NUCLEAR models
Abstract

Properties of thermally excited rotating nuclei are discussed by means of the cranked shell model. Focus is put on the violation of the K-quantum number in the rare-earth deformed nucleus 163Er and on the peculiar features of rotational motion in superdeformed Hg nuclei, which appear to be precursory of ergodic rotational bands. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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27. Hyperdeformed Shapes and Jacobi Transitions in 126Ba.

Author

Herskind, B., Hagemann, G. B., Sletten, G., Døssing, Th., Rønn Hansen, C., S. Ødegård, Hübel, H., Bringel, P., Bürger, A., Neusser, A., Singh, A. K., Al-Khatib, A., Patel, S. B., Bracco, A., Leoni, S., Camera, F., Benzoni, G., Mason, P., Paleni, A., and Million, B.

Subjects
SCIENTIFIC experimentation, JACOBI method, PHYSICS, ROTATIONAL motion, FORCE & energy
Abstract

Systematic searches for exotic shapes, hyperdeformation (HD) and Jacobi transitions, have been made in Hf, Nd, Ba, Xe, Sn and Cd nuclei during the last 4 years, guided by theoretical predictions. The most promising results showing patterns of rotational correlations (e.g. 2. order ridges of multiple rotational bands) are found for 126Xe and 126Ba when the very highest multiplicity cascades are selected by various techniques. In particular, the results on 126Ba obtained in 3 different experiments, using both Gammasphere in Berkeley and Euroball IV in Strasbourg are discussed and compared to theoretical predictions and to simulations by a double-potential statistical model for population and γ-decay. A very surprising result was obtained in the last experiment at Euroball, in a full month running time, namely that the observed ridge structure depends very sensitively on the bombarding energy, which points to entrance channel effects. The analysis shows that a discrete HD yrast band intensity will be significantly less than 1 part in 106 of the strongest bands populated in the reaction. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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28. Rotational Damping And Compound Formation In Warm Rotating Nuclei.

Author

Matsuo, M., Leoni, S., Grassi, C., Vigezzi, E., Bracco, A., Do\ssing, T., and Herskind, B.

Subjects
*NUCLEAR structure, *COMPOUND nucleus
Abstract

The rotational damping width Γrot and the compound damping width Γcomp are two fundamental quantities that characterize rapidly rotating compound nuclei having finite thermal excitation energy. A two-component structure in the strength function of consecutive E2 transitions reflects the two widths, and it causes characteristic features in the double and triple gamma-ray spectra. We discuss a new method to extract experimentally values of Γrot and Γcomp. The first preliminary result of this method is presented. [ABSTRACT FROM AUTHOR]

Published
2003

29. The High Energy Photons From Very Symmetric Reactions: The Giant Dipole Resonance In 179Au Nucleus.

Author

Camera, F., Bracco, A., Vedova, F. Della, Leoni, S., Million, B., Mantovani, S., Pignanelli, M., Wieland, O., Nanal, V., Carpenter, M. P., Hoffman, D., Back, B. B., Heinz, A. M., Janssens, R. V. F., Jenkins, D., Khoo, T. L., Kondev, F. G., Lauritsen, T., and Lister, C. J.

Subjects
GOLD, NUCLEAR structure, PHOTONS
Abstract

High-energy γ rays emitted in the symmetric reaction [sup 90]Zr + [sup 89]Y have been measured at the Argonne National Laboratory using the LEPPEX array coupled to the Fragment Mass Analyzer (FMA). The high-energy γ-ray spectra emitted by the giant dipole resonance built on excited states and associated with the evaporation of 0, 1 and 2 nucleons have been measured. The statistical model analysis indicates that the radiative-fusion process, namely the 0 particle emission channel, can be well described as a compound nucleus decay channel. In addition, the analysis of the highenergy γ-ray spectra associated with the different evaporation channels provides the first evidence that shell effects still play a role in determining the nuclear shapes of [sup 179]Au in the temperature interval 0.5-1 MeV. [ABSTRACT FROM AUTHOR]

Published
2003

30. Evidence of the wobbling mode.

Author

Ødega˚rd, S. W., Hagemann, G. B., Jensen, D. R., Bergstro¨m, M., Herskind, B., Sletten, G., To¨rma¨nen, S., Wilson, J. N., Tjøm, P. O., Hamamoto, I., Spohr, K., Hu¨bel, H., Go¨rgen, A., Scho¨nwasser, G., Bracco, A., Leoni, S., Maj, A., Petrache, C. M., Bednarczyk, P., and Curien, D.

Subjects
ROTATIONAL motion, NUCLEAR excitation
Abstract

The wobbling mode is a direct consequence of rotational motion of a triaxial body. The wobbling degree of freedom introduces sequences of bands with increasing number of wobbling quanta and a characteristic ΔI=1 decay pattern between the bands in competition with the in-band decay. A favorable candidate for establishing this exotic excitation mode is found for the first time in one of the Lu-isotopes for which stable triaxial superdeformed shapes are expected. © 2002 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2002

31. Rotation of highly excited nuclei: Mass dependence of rotational damping

Author

Million, B., primary, Frattini, S., additional, Bracco, A., additional, Leoni, S., additional, Camera, F., additional, Blasi, N., additional, Lo Bianco, G., additional, Pignanelli, M., additional, Vigezzi, E., additional, Herskind, B., additional, Do̸ssing, T., additional, Bergström, M., additional, Varmette, P., additional, Törmänen, S., additional, Maj, A., additional, Kmiecik, M., additional, Napoli, D. R., additional, and Matsuo, M., additional

Published
1999
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32. Decay out of the highly-deformed bands in the A=130 mass region and experimental Δ[sub ν] for Nd nuclei

Author

Petrache, C. M., primary, Bazzacco, D., additional, Falconi, G., additional, Lunardi, S., additional, Maglione, E., additional, Menegazzo, R., additional, Rossi Alvarez, C., additional, Venturelli, R., additional, Viesti, G., additional, de Angelis, G., additional, De Poli, M., additional, Fahlander, C., additional, Farnea, E., additional, Gadea, A., additional, Maron, G., additional, Napoli, D. R., additional, Podolyàk, Zs., additional, Perriès, S., additional, Astier, A., additional, Ducroux, L., additional, Meyer, M., additional, Redon, N., additional, Bracco, A., additional, Frattini, S., additional, Leoni, S., additional, Deloncle, I., additional, Porquet, M. G., additional, Marginean, N., additional, Ur, C. A., additional, Cederwall, B., additional, Johnson, A., additional, and Wyss, R., additional

Published
1999
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33. Reaction Dynamics And Nuclear Structure Via Deep Inelastic Collisions With Heavy-Ions: Search For Particle-Vibration Couplings in 49Ca.

Author

Montanari, D., Leoni, S., Benzoni, G., Blasi, N., Bocchi, G., Bracco, A., Brambilla, S., Camera, F., Corsi, A., Crespi, F. C. L., Million, B., Nicolini, R., Wieland, O., Corradi, L., de Angelis, G., Vedova, F. Della, Fioretto, E., Gadea, A., Guiot, B., and Napoli, D. R.

Subjects
*DEEP inelastic collisions, *NUCLEAR reactions, *NUCLEAR structure, *HEAVY ions, *PARTICLES (Nuclear physics), *POTENTIAL barrier, *ANGULAR distribution (Nuclear physics)
Abstract

The deep inelastic reaction (DIC) 48Ca+64Ni, at an energy approximately 2.5 times above the Coulomb barrier, was studied using the CLARA-PRISMA setup at the Laboratori Nazionali di Legnaro. Total cross sections and angular distributions, both energy integrated and associated to the population of selected excited states, are measured for the most intense reaction channels. The γ-decay of the most intense reaction products is also studied. The use of angular distributions and polarization measurements of γ transitions allows to firmly establish spin and parity of excited states. Both reaction and gamma spectroscopy studies demonstrate the relevance of DIC with heavy ions for the investigation of moderately neutron rich systems. [ABSTRACT FROM AUTHOR]

Published
2011
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