Author: "Farnea, E" / Publisher: amer physical soc - Searchworks@Jio Institute Digital Library Search Results

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39 results on '"Farnea, E"'

1. Identification of high-spin proton configurations in Ba-136 and Ba-137

Author: Kaya, L., Vogt, A., Reiter, P., Mueller-Gatermann, C., Gargano, A., Coraggio, L., Itaco, N., Blazhev, A., Arnswald, K., Bazzacco, D., Birkenbach, B., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Droste, M., Eberth, J., Farnea, E., Fioretto, E., Fransen, C., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Hadynska-Klek, K., Hess, H., Hetzenegger, R., Hirsch, R., John, P. R., Jolie, J., Jungclaus, A., Korten, W., Leoni, S., Lewandowski, L., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Podolyak, Zs, Pollarolo, G., Recchia, F., Rosiak, D., Saed-Samii, N., Sahin, E., Siciliano, M., Scarlassara, F., Seidlitz, M., Soderstrom, P-A, Stefanini, A. M., Stezowski, O., Szilner, S., Szpak, B., Ur, C., Valiente-Dobon, J. J., Weinert, M., Wolf, K., Zell, K. O., Kaya, L., Vogt, A., Reiter, P., Mueller-Gatermann, C., Gargano, A., Coraggio, L., Itaco, N., Blazhev, A., Arnswald, K., Bazzacco, D., Birkenbach, B., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Droste, M., Eberth, J., Farnea, E., Fioretto, E., Fransen, C., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Hadynska-Klek, K., Hess, H., Hetzenegger, R., Hirsch, R., John, P. R., Jolie, J., Jungclaus, A., Korten, W., Leoni, S., Lewandowski, L., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Podolyak, Zs, Pollarolo, G., Recchia, F., Rosiak, D., Saed-Samii, N., Sahin, E., Siciliano, M., Scarlassara, F., Seidlitz, M., Soderstrom, P-A, Stefanini, A. M., Stezowski, O., Szilner, S., Szpak, B., Ur, C., Valiente-Dobon, J. J., Weinert, M., Wolf, K., and Zell, K. O.
Abstract: The high-spin structures of Ba-136 and Ba-137 are investigated after multinucleon-transfer (MNT) and fusion-evaporation reactions. Ba-136 is populated in a Xe-136 + U-238 MNT reaction employing the high-resolution Advanced GAmma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy, and in two Be-9 + Te-130 fusion-evaporation reactions using the High-efficiency Observatory for gamma-Ray Unique Spectroscopy (HORUS) at the FN tandem accelerator of the University of Cologne, Germany. Furthermore, both isotopes are populated in an elusive reaction channel in the B-11 + Te-130 fusion-evaporation reaction utilizing the HORUS gamma-ray array. The level scheme above the J(pi) = 10(+) isomer in Ba-136 is revised and extended up to an excitation energy of approximately 5.5 MeV. From the results of angular-correlation measurements, the E-x = 3707- and E-x = 4920-keV states are identified as the bandheads of positive- and negative-parity cascades. While the high-spin regimes of both Te-132 and Xe-134 are characterized by high-energy 12(+) -> 10(+) transitions, the Ba-136 E2 ground-state band is interrupted by negative-parity states only a few hundred keV above the J(pi) = 10(+) isomer. Furthermore, spins are established for several hitherto unassigned high-spin states in Ba-137. The new results close a gap along the high-spin structure of N < 82 Ba isotopes. Experimental results are compared to large-scale shell-model calculations employing the GCN50:82, Realistic SM, PQM130, and SN100PN interactions. The calculations suggest that the bandheads of the positive-parity bands in both isotopes are predominantly of proton character.
Published: 2019

2. Isomer spectroscopy in Ba-133 and high-spin structure of Ba-134

Author: Kaya, L., Vogt, A., Reiter, P., Siciliano, M., Shimizu, N., Utsuno, Y., Wang, H-K, Gargano, A., Coraggio, L., Itaco, N., Arnswald, K., Bazzacco, D., Birkenbach, B., Blazhev, A., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Droste, M., Eberth, J., Esmaylzadeh, A., Farnea, E., Fioretto, E., Fransen, C., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Hadynska-Klek, K., Hess, H., Hirsch, R., John, P. R., Jolie, J., Jungclaus, A., Karayonchev, V, Kornwebel, L., Korten, W., Leoni, S., Lewandowski, L., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Mueller-Gatermann, C., Napoli, D., Podolyak, Zs, Pollarolo, G., Recchia, F., Regis, J-M, Saed-Samii, N., Sahin, E., Scarlassara, F., Schomacker, K., Seidlitz, M., Siebeck, B., Soderstrom, P-A, Stefanini, A. M., Stezowski, O., Szilner, S., Szpak, B., Teruya, E., Ur, C., Valiente-Dobon, J. J., Wolf, K., Yanase, K., Yoshinaga, N., Zell, K. O., Kaya, L., Vogt, A., Reiter, P., Siciliano, M., Shimizu, N., Utsuno, Y., Wang, H-K, Gargano, A., Coraggio, L., Itaco, N., Arnswald, K., Bazzacco, D., Birkenbach, B., Blazhev, A., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Droste, M., Eberth, J., Esmaylzadeh, A., Farnea, E., Fioretto, E., Fransen, C., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Hadynska-Klek, K., Hess, H., Hirsch, R., John, P. R., Jolie, J., Jungclaus, A., Karayonchev, V, Kornwebel, L., Korten, W., Leoni, S., Lewandowski, L., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Mueller-Gatermann, C., Napoli, D., Podolyak, Zs, Pollarolo, G., Recchia, F., Regis, J-M, Saed-Samii, N., Sahin, E., Scarlassara, F., Schomacker, K., Seidlitz, M., Siebeck, B., Soderstrom, P-A, Stefanini, A. M., Stezowski, O., Szilner, S., Szpak, B., Teruya, E., Ur, C., Valiente-Dobon, J. J., Wolf, K., Yanase, K., Yoshinaga, N., and Zell, K. O.
Abstract: The transitional nuclei Ba-134 and Ba-133 are investigated after multinucleon transfer employing the high-resolution Advanced GAmma Tracking Array coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy, and after fusion-evaporation reaction at the FN tandem accelerator of the University of Cologne, Germany. The J(pi) = 19/2(+) state at 1942 keV in Ba-133 is identified as an isomer with a half-life of 66.6(20) ns corresponding to a B(E1) value of 7.7(4) x 10(-6) e(2) fm(2) for the J(pi) = 19/2(+) to J(pi) = 19/2(-) transition. The level scheme of Ba-134 above the J(pi) = 10(+) isomer is extended to approximately 6 MeV. A pronounced backbending is observed at h omega = 0.38 MeV along the positive-parity yrast band. The results are compared to the high-spin systematics of the Z = 56 isotopes. Large-scale shell-model calculations employing the GCN50:82, SN100PN, SNV, PQM130, Realistic SM, and EPQQM interactions reproduce the experimental findings and elucidate the structure of the high-spin states. The shell-model calculations employing the GCN50:82 and PQM130 interactions reproduce alignment properties and provide detailed insight into the microscopic origin of this phenomenon in transitional Ba-134.
Published: 2019

3. Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA

Author: Hadynska-Klek, K., Napiorkowski, P. J., Zielinska, M., Srebrny, J., Maj, A., Azaiez, F., Dobon, J. J. Valiente, Kicinska-Habior, M., Nowacki, F., Naidja, H., Bounthong, B., Rodriguez, T. R., de Angelis, G., Abraham, T., Kumar, G. Anil, Bazzacco, D., Bellato, M., Bortolato, D., Bednarczyk, P., Benzoni, G., Berti, L., Birkenbach, B., Bruyneel, B., Brambilla, S., Camera, F., Chavas, J., Cederwall, B., Charles, L., Ciemala, M., Cocconi, P., Coleman-Smith, P., Colombo, A., Corsi, A., Crespi, F. C. L., Cullen, D. M., Czermak, A., Desesquelles, P., Doherty, D. T., Dulny, B., Eberth, J., Farnea, E., Fornal, B., Franchoo, S., Gadea, A., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Gorgen, A., Gulmini, M., Habermann, T., Hess, H., Isocrate, R., Iwanicki, J., Jaworski, G., Judson, D. S., Jungclaus, A., Karkour, N., Kmiecik, M., Karpinski, D., Kisielinski, M., Kondratyev, N., Korichi, A., Komorowska, M., Kowalczyk, M., Korten, W., Krzysiek, M., Lehaut, G., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lunardi, S., Maron, G., Mazurek, K., Menegazzo, R., Mengoni, D., Merchan, E., Meczynski, W., Michelagnoli, C., Million, B., Myalski, S., Napoli, D. R., Niikura, M., Obertelli, A., Ozmen, S. F., Palacz, M., Prochniak, L., Pullia, A., Quintana, B., Rampazzo, G., Recchia, F., Redon, N., Reiter, P., Rosso, D., Rusek, K., Sahin, E., Salsac, M-D, Söderström, Pär-Anders, Stefan, I., Stezowski, O., Styczen, J., Theisen, Ch., Toniolo, N., Ur, C. A., Wadsworth, R., Wasilewska, B., Wiens, A., Wood, J. L., Wrzosek-Lipska, K., Zieblinski, M., Hadynska-Klek, K., Napiorkowski, P. J., Zielinska, M., Srebrny, J., Maj, A., Azaiez, F., Dobon, J. J. Valiente, Kicinska-Habior, M., Nowacki, F., Naidja, H., Bounthong, B., Rodriguez, T. R., de Angelis, G., Abraham, T., Kumar, G. Anil, Bazzacco, D., Bellato, M., Bortolato, D., Bednarczyk, P., Benzoni, G., Berti, L., Birkenbach, B., Bruyneel, B., Brambilla, S., Camera, F., Chavas, J., Cederwall, B., Charles, L., Ciemala, M., Cocconi, P., Coleman-Smith, P., Colombo, A., Corsi, A., Crespi, F. C. L., Cullen, D. M., Czermak, A., Desesquelles, P., Doherty, D. T., Dulny, B., Eberth, J., Farnea, E., Fornal, B., Franchoo, S., Gadea, A., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Gorgen, A., Gulmini, M., Habermann, T., Hess, H., Isocrate, R., Iwanicki, J., Jaworski, G., Judson, D. S., Jungclaus, A., Karkour, N., Kmiecik, M., Karpinski, D., Kisielinski, M., Kondratyev, N., Korichi, A., Komorowska, M., Kowalczyk, M., Korten, W., Krzysiek, M., Lehaut, G., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lunardi, S., Maron, G., Mazurek, K., Menegazzo, R., Mengoni, D., Merchan, E., Meczynski, W., Michelagnoli, C., Million, B., Myalski, S., Napoli, D. R., Niikura, M., Obertelli, A., Ozmen, S. F., Palacz, M., Prochniak, L., Pullia, A., Quintana, B., Rampazzo, G., Recchia, F., Redon, N., Reiter, P., Rosso, D., Rusek, K., Sahin, E., Salsac, M-D, Söderström, Pär-Anders, Stefan, I., Stezowski, O., Styczen, J., Theisen, Ch., Toniolo, N., Ur, C. A., Wadsworth, R., Wasilewska, B., Wiens, A., Wood, J. L., Wrzosek-Lipska, K., and Zieblinski, M.
Abstract: ACoulomb-excitation experiment to study electromagnetic properties of Ca-42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. gamma rays from excited states in Ca-42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca-42, including the diagonal E2 matrix elements of 2(1)(+) and 2(2)(+) states, were determined using the least-squares code GOSIA. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 0(1),(+)(2) and 2(1,2)(+) states, as well as triaxiality for 0(1,2)(+) states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca-42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca-42.
Published: 2018
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4. Transition probabilities in neutron-rich Se-80,Se-82 and the role of the nu g(9/2) orbital

Author: Litzinger, J., Blazhev, A., Dewald, A., Didierjean, F., Duchene, G., Fransen, C., Lozeva, R., Verney, D., de Angelis, G., Bazzacco, D., Birkenbach, B., Bottoni, S., Bracco, A., Braunroth, T., Cederwall, B., Corradi, L., Crespi, F. C. L., Desesquelles, P., Eberth, J., Ellinger, E., Farnea, E., Fioretto, E., Gernhaeuser, R., Goasduff, A., Gorgen, A., Gottardo, A., Grebosz, J., Hackstein, M., Hess, H., Ibrahim, F., Jolie, J., Jungclaus, A., Kolos, K., Korten, W., Leoni, S., Lunardi, S., Maj, A., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Million, B., Moeller, O., Modamio, V., Montagnoli, G., Montanari, D., Morales, A. I., Napoli, D. R., Niikura, M., Pietralla, N., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstroem, P. -A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Valiente-Dobon, J. J., Vandone, V., Vogt, A., Litzinger, J., Blazhev, A., Dewald, A., Didierjean, F., Duchene, G., Fransen, C., Lozeva, R., Verney, D., de Angelis, G., Bazzacco, D., Birkenbach, B., Bottoni, S., Bracco, A., Braunroth, T., Cederwall, B., Corradi, L., Crespi, F. C. L., Desesquelles, P., Eberth, J., Ellinger, E., Farnea, E., Fioretto, E., Gernhaeuser, R., Goasduff, A., Gorgen, A., Gottardo, A., Grebosz, J., Hackstein, M., Hess, H., Ibrahim, F., Jolie, J., Jungclaus, A., Kolos, K., Korten, W., Leoni, S., Lunardi, S., Maj, A., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Million, B., Moeller, O., Modamio, V., Montagnoli, G., Montanari, D., Morales, A. I., Napoli, D. R., Niikura, M., Pietralla, N., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstroem, P. -A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Valiente-Dobon, J. J., Vandone, V., and Vogt, A.
Abstract: Transition probabilities of intermediate-spin yrast and non-yrast excitations in Se-80,Se-82 were investigated in a recoil distance Doppler-shift (RDDS) experiment performed at the Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro. The Cologne Plunger device for deep inelastic scattering was used for the RDDS technique and was combined with the AGATA Demonstrator array for the gamma-ray detection and coupled to the PRISMA magnetic spectrometer for an event-by-event particle identification. In Se-80, the level lifetimes of the yrast (6(1)(+)) and (8(1)(+)) states and of a non-yrast band feeding the yrast 4(1)(+) state are determined. A spin and parity assignment of the head of this sideband is discussed based on the experimental results and supported by large-scale shell-model calculations. In Se-82, the level lifetimes of the yrast 6(1)(+) state and the yrare 4(2)(+) state and lifetime limits of the yrast (10(1)(+)) state and of the 5(1)(-) state are determined. Although the experimental results contain large uncertainties, they are interpreted with care in terms of large-scale shell-model calculations using the effective interactions JUN45 and jj44b. The excited states' wave functions are investigated and discussed with respect to the role of the neutron g(9/2) orbital.
Published: 2018

5. High-spin structure in the transitional nucleus Xe-131: Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

Author: Kaya, L., Vogt, A., Reiter, P., Siciliano, M., Birkenbach, B., Blazhev, A., Coraggio, L., Teruya, E., Yoshinaga, N., Higashiyama, K., Arnswald, K., Bazzacco, D., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Eberth, J., Farnea, E., Fioretto, E., Fransen, C., Fu, B., Gadea, A., Gargano, A., Giaz, A., Gorgen, A., Gottardo, A., Hadynska-Klek, K., Hess, H., Hetzenegger, R., Hirsch, R., Itaco, N., John, P. R., Jolie, J., Jungclaus, A., Korten, W., Leoni, S., Lewandowski, L., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Mueller-Gatermann, C., Napoli, D., Podolyak, Zs., Pollarolo, G., Pullia, A., Queiser, M., Recchia, F., Rosiak, D., Saed-Samii, N., Sahin, E., Scarlassara, F., Schneiders, D., Seidlitz, M., Siebeck, B., Smith, J. F., Soderstrom, P. -A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Ur, C., Valiente-Dobon, J. J., Wolf, K., Zell, K. O., Kaya, L., Vogt, A., Reiter, P., Siciliano, M., Birkenbach, B., Blazhev, A., Coraggio, L., Teruya, E., Yoshinaga, N., Higashiyama, K., Arnswald, K., Bazzacco, D., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Eberth, J., Farnea, E., Fioretto, E., Fransen, C., Fu, B., Gadea, A., Gargano, A., Giaz, A., Gorgen, A., Gottardo, A., Hadynska-Klek, K., Hess, H., Hetzenegger, R., Hirsch, R., Itaco, N., John, P. R., Jolie, J., Jungclaus, A., Korten, W., Leoni, S., Lewandowski, L., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Mueller-Gatermann, C., Napoli, D., Podolyak, Zs., Pollarolo, G., Pullia, A., Queiser, M., Recchia, F., Rosiak, D., Saed-Samii, N., Sahin, E., Scarlassara, F., Schneiders, D., Seidlitz, M., Siebeck, B., Smith, J. F., Soderstrom, P. -A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Ur, C., Valiente-Dobon, J. J., Wolf, K., and Zell, K. O.
Abstract: The transitional nucleus Xe-131 is investigated after multinucleon transfer in the Xe-136 + Pb-208 and Xe-136 +U-238 reactions employing the high-resolution Advanced gamma-Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy, and as an elusive reaction product in the fusion-evaporation reaction Sn-124(B-11) ,p3n)Xe-131 employing the High-efficiency Observatory for gamma-Ray Unique Spectroscopy (HORUS) gamma-ray array coupled to a double-sided silicon strip detector at the University of Cologne, Germany. The level scheme of Xe-131 is extended to 5 MeV. A pronounced backbending is observed at (h) over bar omega approximate to 0.4 MeV along the negative-parity one-quasiparticle vh(11/12)(alpha = -1/2) band. The results are compared to the high-spin systematics of the Z = 54 isotopes and the N = 77 isotones. Large-scale shell-model calculations employing the PQM130, SN100PN, GCN50:82, SN100-KTH, and a realistic effective interaction reproduce the experimental findings and provide guidance to elucidate the structure of the high-spin states. Further calculations in Xe129-132 provide insight into the changing nuclear structure along the Xe chain towards the N = 82 shell closure. Proton occupancy in the pi 0h(11/2) orbital is found to be decisive for the description of the observed backbending phenomenon.
Published: 2018

6. Millisecond 23/2(+) isomers in the N=79 isotones Xe-133 and Ba-135

Author: Kaya, L., Vogt, A., Reiter, P., Mueller-Gatermann, C., Siciliano, M., Coraggio, L., Itaco, N., Gargano, A., Arnswald, K., Bazzacco, D., Birkenbach, B., Blazhev, A., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Droste, M., Eberth, J., Farnea, E., Fioretto, E., Fransen, C., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Hadynska-Klek, K., Hess, H., Hetzenegger, R., Hirsch, R., John, P. R., Jolie, J., Jungclaus, A., Korten, W., Leoni, S., Lewandowski, L., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Podolyak, Zs, Pollarolo, G., Recchia, F., Rosiak, D., Saed-Samii, N., Sahin, E., Scarlassara, F., Seidlitz, M., Soederstroem, P-A, Stefanini, A. M., Stezowski, O., Szilner, S., Szpak, B., Ur, C., Valiente-Dobon, J. J., Weinert, M., Wolf, K., Zell, K. O., Kaya, L., Vogt, A., Reiter, P., Mueller-Gatermann, C., Siciliano, M., Coraggio, L., Itaco, N., Gargano, A., Arnswald, K., Bazzacco, D., Birkenbach, B., Blazhev, A., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Droste, M., Eberth, J., Farnea, E., Fioretto, E., Fransen, C., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Hadynska-Klek, K., Hess, H., Hetzenegger, R., Hirsch, R., John, P. R., Jolie, J., Jungclaus, A., Korten, W., Leoni, S., Lewandowski, L., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Podolyak, Zs, Pollarolo, G., Recchia, F., Rosiak, D., Saed-Samii, N., Sahin, E., Scarlassara, F., Seidlitz, M., Soederstroem, P-A, Stefanini, A. M., Stezowski, O., Szilner, S., Szpak, B., Ur, C., Valiente-Dobon, J. J., Weinert, M., Wolf, K., and Zell, K. O.
Abstract: Detailed information on isomeric states in A approximate to 135 nuclei is exploited to shell-model calculations in the region northwest of doubly magic nucleus Sn-132. The N = 79 isotones Xe-133 and Ba-135 are studied after multinucleon transfer in the Xe-136 + Pb-208 reaction employing the high-resolution Advanced GAmma Array (AGATA) coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy and in a pulsed-beam experiment at the FN tandem accelerator of the University of Cologne Germany utilizing a Be-9 + Te-130 fusion-evaporation reaction at a beam energy of 40 MeV. Isomeric states are identified via delayed gamma-ray spectroscopy. Hitherto tentative excitation energy spin and parity assignments of the 2017-keV J(pi) = 23/2(+) isomer in Xe-133 are confirmed and a half-life of T-1/2 = 8.64(13) ms is measured. The 2388-keV state in Ba-135. is identified as a J(pi) = 23/2(+) isomer with a half-life of 1.06(4) ms. The new results show a smooth onset of isomeric J(pi) = 23/2(+) states along the N = 79 isotones and close a gap in the high-spin systematics towards the recently investigated J(pi) = 23/2(+) isomer in Nd-139. The resulting systematics of M2 reduced transition probabilities is discussed within the of the nuclear shell model. Latest large-scale shell-model calculations employing the SN100PN, GCN50:82, SN100-KTH and a realistic effective interaction reproduce the experimental findings generally well and give insight into the structure of the isomers.
Published: 2018

7. Isomers and high-spin structures in the N=81 isotones Xe-135 and Ba-137

Author: Vogt, A., Birkenbach, B., Reiter, P., Blazhev, A., Siciliano, M., Hadynska-Klek, K., Valiente-Dobon, J. J., Wheldon, C., Teruya, E., Yoshinaga, N., Arnswald, K., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Chakrawarthy, R. S., Chapman, R., Cline, D., Corradi, L., Crespi, F. C. L., Cromaz, M., de Angelis, G., Eberth, J., Fallon, P., Farnea, E., Fioretto, E., Freeman, S. J., Fu, B., Gadea, A., Geibel, K., Gelletly, W., Gengelbach, Aila, Giaz, A., Gorgen, A., Gottardo, A., Hayes, A. B., Hess, H., Hirsch, R., Hua, H., John, P. R., Jolie, J., Jungclaus, A., Kaya, L., Korten, W., Lee, I. Y., Leoni, S., Lewandowski, L., Liang, X., Lunardi, S., Macchiavelli, A. O., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Mueller-Gatermann, C., Napoli, D., Pearson, C. J., Pellegri, L., Podolyak, Zs., Pollarolo, G., Pullia, A., Queiser, M., Radeck, F., Recchia, F., Regan, P. H., Rosiak, D., Saed-Samii, N., Sahin, E., Scarlassara, F., Schneiders, D., Seidlitz, M., Siebeck, B., Sletten, G., Smith, J. F., Söderström, Pär-Anders, Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Teng, R., Ur, C., Vandone, V., Warner, D. D., Wiens, A., Wu, C. Y., Zell, K. O., Vogt, A., Birkenbach, B., Reiter, P., Blazhev, A., Siciliano, M., Hadynska-Klek, K., Valiente-Dobon, J. J., Wheldon, C., Teruya, E., Yoshinaga, N., Arnswald, K., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Chakrawarthy, R. S., Chapman, R., Cline, D., Corradi, L., Crespi, F. C. L., Cromaz, M., de Angelis, G., Eberth, J., Fallon, P., Farnea, E., Fioretto, E., Freeman, S. J., Fu, B., Gadea, A., Geibel, K., Gelletly, W., Gengelbach, Aila, Giaz, A., Gorgen, A., Gottardo, A., Hayes, A. B., Hess, H., Hirsch, R., Hua, H., John, P. R., Jolie, J., Jungclaus, A., Kaya, L., Korten, W., Lee, I. Y., Leoni, S., Lewandowski, L., Liang, X., Lunardi, S., Macchiavelli, A. O., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Mueller-Gatermann, C., Napoli, D., Pearson, C. J., Pellegri, L., Podolyak, Zs., Pollarolo, G., Pullia, A., Queiser, M., Radeck, F., Recchia, F., Regan, P. H., Rosiak, D., Saed-Samii, N., Sahin, E., Scarlassara, F., Schneiders, D., Seidlitz, M., Siebeck, B., Sletten, G., Smith, J. F., Söderström, Pär-Anders, Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Teng, R., Ur, C., Vandone, V., Warner, D. D., Wiens, A., Wu, C. Y., and Zell, K. O.
Abstract: The high-spin structures and isomers of the N = 81 isotones Xe-135 and Ba-137 are investigated after multinucleon-transfer (MNT) and fusion-evaporation reactions. Both nuclei are populated (i) in Xe-136+ U-238 and (ii) Xe-136+ Pb-208 MNT reactions employing the high-resolution Advanced Gamma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (iii) in the Xe-136+ Pt-198 MNT reaction employing the gamma-ray array GAMMASPHERE in combination with the gas-detector array CHICO, and (iv) via a B-11+ Te-130 fusion-evaporation reaction with the HORUS gamma-ray array at the University of Cologne. The high-spin level schemes of Xe-135 and Ba-137 are considerably extended to higher energies. The 2058-keV (19/2(-)) state in Xe-135 is identified as an isomer, closing a gap in the systematics along the N = 81 isotones. Its half-life is measured to be 9.0(9) ns, corresponding to a reduced transition probability of B(E2,19/2(-) -> 15/2(-)) = 0.52(6) W.u. The experimentally deduced reduced transition probabilities of the isomeric states are compared to shell-model predictions. Latest shell-model calculations reproduce the experimental findings generally well and provide guidance to the interpretation of the new levels.
Published: 2017
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8. In-beam gamma-ray spectroscopy of the neutron-rich platinum isotope Pt-200 toward the N=126 shell gap

Author: John, P. R., Valiente-Dobon, J. J., Mengoni, D., Modamio, V., Lunardi, S., Bazzacco, D., Gadea, A., Wheldon, C., Rodriguez, T. R., Alexander, T., de Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Bottoni, S., Bowry, M., Bracco, A., Browne, F., Bunce, M., Camera, F., Corradi, L., Crespi, F. C. L., Melon, B., Farnea, E., Fioretto, E., Gottardo, A., Grente, L., Hess, H., Kokalova, Tz., Korten, W., Kusoglu, A., Lenzi, S., Leoni, S., Ljungvall, J., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D. R., Podolyak, Zs., Pollarolo, G., Recchia, F., Reiter, P., Roberts, O. J., Sahin, E., Salsac, M. -D, Scarlassara, F., Sferrazza, M., Soderstrom, Pär-Anders, Stefanini, A. M., Szilner, S., Ur, C. A., Vogt, A., Walshe, J., John, P. R., Valiente-Dobon, J. J., Mengoni, D., Modamio, V., Lunardi, S., Bazzacco, D., Gadea, A., Wheldon, C., Rodriguez, T. R., Alexander, T., de Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Bottoni, S., Bowry, M., Bracco, A., Browne, F., Bunce, M., Camera, F., Corradi, L., Crespi, F. C. L., Melon, B., Farnea, E., Fioretto, E., Gottardo, A., Grente, L., Hess, H., Kokalova, Tz., Korten, W., Kusoglu, A., Lenzi, S., Leoni, S., Ljungvall, J., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D. R., Podolyak, Zs., Pollarolo, G., Recchia, F., Reiter, P., Roberts, O. J., Sahin, E., Salsac, M. -D, Scarlassara, F., Sferrazza, M., Soderstrom, Pär-Anders, Stefanini, A. M., Szilner, S., Ur, C. A., Vogt, A., and Walshe, J.
Abstract: The neutron-rich nucleus Pt-200 is investigated via in-beam gamma-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N = 126 shell closure. The two-neutron transfer reaction Pt-198(Se-82, Se-80)Pt-200 is used to populate excited states of Pt-200. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects gamma rays coincident with the Se-80 recoils, the binary partner of Pt-200. The binary partner method is applied to extract the gamma-ray transitions and build the level scheme of Pt-200. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (6(1)(+)) state. An additional gamma ray was found and it presumably deexcites the (8(1)(+)) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even Pt190-204 isotopes, revealing that Pt-200 marks the transition from the gamma-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N = 126 shell closure.
Published: 2017
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9. High-spin structures in Xe-132 and Xe-133 and evidence for isomers along the N=79 isotones

Author: Vogt, A., Siciliano, M., Birkenbach, B., Reiter, P., Hadynska-Klek, K., Wheldon, C., Valiente-Dobon, J. J., Teruya, E., Yoshinaga, N., Arnswald, K., Bazzacco, D., Blazhev, A., Bracco, A., Bruyneel, B., Chakrawarthy, R. S., Chapman, R., Cline, D., Corradi, L., Crespi, F. C. L., Cromaz, M., de Angelis, G., Eberth, J., Fallon, P., Farnea, E., Fioretto, E., Fransen, C., Freeman, S. J., Fu, B., Gadea, A., Gelletly, W., Giaz, A., Gorgen, A., Gottardo, A., Hayes, A. B., Hess, H., Hetzenegger, R., Hirsch, R., Hua, H., John, P. R., Jolie, J., Jungclaus, A., Karayonchev, V., Kaya, L., Korten, W., Lee, I. Y., Leoni, S., Liang, X., Lunardi, S., Macchiavelli, A. O., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Mueller-Gatermann, C., Napoli, D., Pearson, C. J., Podolyak, Zs., Pollarolo, G., Pullia, A., Queiser, M., Recchia, F., Regan, P. H., Regis, J. -M., Saed-Samii, N., Sahin, E., Scarlassara, F., Seidlitz, M., Siebeck, B., Sletten, G., Smith, J. F., Soderstrom, P. -A., Stefanini, A. M., Stezowski, O., Szilner, S., Szpak, B., Teng, R., Ur, C., Warner, D. D., Wolf, K., Wu, C. Y., Zell, K. O., Vogt, A., Siciliano, M., Birkenbach, B., Reiter, P., Hadynska-Klek, K., Wheldon, C., Valiente-Dobon, J. J., Teruya, E., Yoshinaga, N., Arnswald, K., Bazzacco, D., Blazhev, A., Bracco, A., Bruyneel, B., Chakrawarthy, R. S., Chapman, R., Cline, D., Corradi, L., Crespi, F. C. L., Cromaz, M., de Angelis, G., Eberth, J., Fallon, P., Farnea, E., Fioretto, E., Fransen, C., Freeman, S. J., Fu, B., Gadea, A., Gelletly, W., Giaz, A., Gorgen, A., Gottardo, A., Hayes, A. B., Hess, H., Hetzenegger, R., Hirsch, R., Hua, H., John, P. R., Jolie, J., Jungclaus, A., Karayonchev, V., Kaya, L., Korten, W., Lee, I. Y., Leoni, S., Liang, X., Lunardi, S., Macchiavelli, A. O., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Mueller-Gatermann, C., Napoli, D., Pearson, C. J., Podolyak, Zs., Pollarolo, G., Pullia, A., Queiser, M., Recchia, F., Regan, P. H., Regis, J. -M., Saed-Samii, N., Sahin, E., Scarlassara, F., Seidlitz, M., Siebeck, B., Sletten, G., Smith, J. F., Soderstrom, P. -A., Stefanini, A. M., Stezowski, O., Szilner, S., Szpak, B., Teng, R., Ur, C., Warner, D. D., Wolf, K., Wu, C. Y., and Zell, K. O.
Abstract: The transitional nuclei Xe-132 and Xe-133 are investigated after multinucleon-transfer (MNT) and fusionevaporation reactions. Both nuclei are populated (i) in Xe-136 + 2(08P)b MNT reactions employing the highresolution Advanced GAmma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (ii) in the Xe-136 + Pt-198 MNT reaction employing the GAMMASPHERE spectrometer in combination with the gas-detector array CHICO, and (iii) as an evaporation residue after a Te-130(alpha, xn) Xe134-xn fusion-evaporation reaction employing the HORUS gamma-ray array at the University of Cologne. The high-spin level schemes are considerably extended above the J(pi) = (7(-)) and (10+) isomers in Xe-132 and above the 11/2(-) isomer in Xe-133. The results are compared to the high-spin systematics of the Z = 54 as well as the N = 78 and N = 79 chains. Furthermore, evidence is found for a long-lived (T-1/2 >> mu s) isomer in Xe-133 which closes a gap along the N = isotones. Shell-model calculations employing the SN100PN and PQM130 effective interactions reproduce the experimental findings and provide guidance to the interpretation of the observed high-spin features.
Published: 2017

10. Lifetimes and electromagnetic transition strengths in Dy-157

Author: Gladnishki, K. A., Petkov, P., Moeller, O., Dewald, A., Jolie, J., Tonev, D., Trichkova, M., Heinze, S., von Brentano, P., Bazzacco, D., Ur, C. A., Farnea, E., Axiotis, M., Lunardi, S., de Angelis, G., Napoli, D. R., Marginean, N., Martinez, T., Caprio, M. A., Rainovski, G., Gladnishki, K. A., Petkov, P., Moeller, O., Dewald, A., Jolie, J., Tonev, D., Trichkova, M., Heinze, S., von Brentano, P., Bazzacco, D., Ur, C. A., Farnea, E., Axiotis, M., Lunardi, S., de Angelis, G., Napoli, D. R., Marginean, N., Martinez, T., Caprio, M. A., and Rainovski, G.
Abstract: Lifetimes of excited states of Dy-157 were measured by recoil distance Doppler-shift (RDDS) and Doppler-shift attenuation (DSAM) methods. The gamma-ray coincidence data were analyzed by the differential decay curve method. The level scheme and the newly deduced transition strengths were simultaneously described in the framework of the particle plus triaxial rotor model (PTRM) and the rigid-rotor model.
Published: 2017

11. Neutron effective single-particle energies above Ni-78: A hint from lifetime measurements in the N = 51 isotones Se-85 and Kr-87

Author: Didierjean, F., Verney, D., Duchene, G., Litzinger, J., Sieja, K., Dewald, A., Goasduff, A., Lozeva, R., Fransen, C., de Angelis, G., Aydin, S., Bazzacco, D., Bracco, A., Bottoni, S., Corradi, L., Crespi, F., Ellinger, E., Farnea, E., Fioretto, E., Franchoo, S., Gottardo, A., Grocutt, L., Hackstein, M., Ibrahim, F., Kolos, K., Leoni, S., Lenzi, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Modamio, V., Moeller, O., Montagnoli, G., Montanari, D., Morales, A. I., Napoli, D., Niikura, M., Recchia, F., Sahin, E., Scarlassara, F., Sengele, L., Szilner, S., Smith, J. F., Stefanini, A. M., Ur, C., Valiente-Dobon, J. J., Vandone, V., Didierjean, F., Verney, D., Duchene, G., Litzinger, J., Sieja, K., Dewald, A., Goasduff, A., Lozeva, R., Fransen, C., de Angelis, G., Aydin, S., Bazzacco, D., Bracco, A., Bottoni, S., Corradi, L., Crespi, F., Ellinger, E., Farnea, E., Fioretto, E., Franchoo, S., Gottardo, A., Grocutt, L., Hackstein, M., Ibrahim, F., Kolos, K., Leoni, S., Lenzi, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Modamio, V., Moeller, O., Montagnoli, G., Montanari, D., Morales, A. I., Napoli, D., Niikura, M., Recchia, F., Sahin, E., Scarlassara, F., Sengele, L., Szilner, S., Smith, J. F., Stefanini, A. M., Ur, C., Valiente-Dobon, J. J., and Vandone, V.
Abstract: Background: While the N = 50 shell-gap evolution towards Ni-78 is presently in the focus of nuclear structure research, experimental information on the neutron effective single-particle energy sequence above the Ni-78 core remain scarce. Direct nucleon-exchange reactions are indeed difficult with presently available post-accelerated radioactive-ion beams (especially for high orbital-momentum orbitals) in this exotic region. Purpose: In this study we probe the evolution of the vlg(7/2)effective single-particle energy which is a key to understanding the possible evolution of the spin-orbit splitting due to the proton-neutron interaction in the Ni-78 region. To achieve this goal, a method based on lifetime measurements is used for the first time. The obtained lifetimes of the 7/2(1)(-) states in Kr-87 and Se-85 are used to investigate the vlg7/2 evolution. Method: Yrast and near-yrast states in the light N = 51 isotones Se-85 and Kr-87 were populated via multinucleon transfer reactions, using a Se-82 beam and a U-238 target at the LNL tandem-ALPI facility. The prompt y rays were detected by the AGATA Demonstrator and particle identification was performed using the PRISMA spectrometer. Lifetime measurements were performed by using the Cologne plunger device for deep inelastic reactions and the Recoil Distance Doppler Shift technique. Results: We obtain (tau(7/21+)) = 0.4(-0.4)(+1.6) ps for Kr-87. In the case of Se-85 an upper limit of 3(2) ps is obtained for the (tau(7/21+)) value. Conclusion: For Kr-87, the measured (7/2(1)(+)) lifetime is consistent with a core-coupled 2(+) circle times v2d(5/2) configuration for this state. This result is consistent with that obtained by direct reaction, which validates our method. For Se-85, the measured (7/2(1)(+)) lifetime limit indicates a very small contribution of the vlg(7/2) configuration to the wave function of this state.
Published: 2017

12. High-spin structure in K-40

Author: Soderstrom, P. -A., Recchia, F., Nyberg, J., Gadea, A., Lenzi, S. M., Poves, A., Atac, A., Aydın, Sezgin, Bazzacco, D., Bednarczyk, P., Bellato, M., Birkenbach, B., Bortolato, D., Boston, A. J., Boston, H. C., Bruyneel, B., Bucurescu, D., Calore, E., Cederwall, B., Charles, L., Chavas, J., Colosimo, S., Crespi, F. C. L., Cullen, D. M., de Angelis, G., Desesquelles, P., Dosme, N., Duchene, G., Eberth, J., Farnea, E., Filmer, F., Gorgen, A., Gottardo, A., Grebosz, J., Gulmini, M., Hess, H., Hughes, T. A., Jaworski, G., Jolie, J., Joshi, P., Judson, D. S., Jungclaus, A., Karkour, N., Karolak, M., Kempley, R. S., Khaplanov, A., Korten, W., Ljungvall, J., Lunardi, S., Maj, A., Maron, G., Meczynski, W., Menegazzo, R., Mengoni, D., Michelagnoli, C., Molini, P., Napoli, D. R., Nolan, P. J., Norman, M., Obertelli, A., Podolyak, Zs., Pullia, A., Quintana, B., Redon, N., Regan, P. H., Reiter, P., Robinson, A. P., Sahin, E., Simpson, J., Salsac, M. D., Smith, J. F., Stezowski, O., Theisen, Ch., Tonev, D., Unsworth, C., Ur, C. A., Valiente-Dobon, J. J., Wiens, A., [Soderstrom, P. -A. -- Nyberg, J.] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden -- [Soderstrom, P. -A.] RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan -- [Recchia, F. -- Lenzi, S. M. -- Aydin, S. -- Bazzacco, D. -- Bellato, M. -- Farnea, E. -- Lunardi, S. -- Menegazzo, R. -- Mengoni, D. -- Michelagnoli, C. -- Molini, P. -- Ur, C. A.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy -- [Recchia, F. -- Lenzi, S. M. -- Aydin, S. -- Mengoni, D. -- Michelagnoli, C. -- Molini, P.] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy -- [Gadea, A.] Univ Valencia, CSIC, Inst Fis Corpuscular, E-46071 Valencia, Spain -- [Poves, A.] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain -- [Poves, A.] Univ Autonoma Madrid, IFT UAM CSIC, E-28049 Madrid, Spain -- [Atac, A.] Ankara Univ, Fac Sci, Dept Phys, TR-06100 Ankara, Turkey -- [Aydin, S.] Aksaray Univ, Fac Sci & Art, Dept Phys, TR-68100 Aksaray, Turkey -- [Bednarczyk, P. -- Maj, A. -- Meczynski, W.] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland -- [Birkenbach, B. -- Bruyneel, B. -- Eberth, J. -- Hess, H. -- Jolie, J. -- Reiter, P. -- Wiens, A.] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany -- [Bortolato, D. -- Calore, E. -- de Angelis, G. -- Gottardo, A. -- Gulmini, M. -- Maron, G. -- Napoli, D. R. -- Sahin, E. -- Valiente-Dobon, J. J.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy -- [Boston, A. J. -- Boston, H. C. -- Colosimo, S. -- Filmer, F. -- Hughes, T. A. -- Judson, D. S. -- Nolan, P. J. -- Norman, M. -- Unsworth, C.] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England -- [Bucurescu, D.] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania -- [Cederwall, B. -- Khaplanov, A.] Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden -- [Charles, L. -- Duchene, G.] CNRS, UMR 7178, F-67037 Strasbourg, France -- [Charles, L. -- Duchene, G.] Univ Strasbourg, IPHC, F-67037 Strasbourg, France -- [Chavas, J. -- Gorgen, A. -- Karolak, M. -- Korten, W. -- Obertelli, A. -- Salsac, M. D. -- Theisen, Ch.] CEA Saclay, IRFU Serv Phys Nucl, F-91191 Gif Sur Yvette, France -- [Crespi, F. C. L. -- Pullia, A.] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy -- [Crespi, F. C. L. -- Pullia, A.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy -- [Cullen, D. M. -- Robinson, A. P.] Univ Manchester, Schuster Lab, Nucl Phys Grp, Manchester M13 9PL, Lancs, England -- [Desesquelles, P. -- Dosme, N. -- Karkour, N. -- Ljungvall, J.] Univ Paris 11, F-91405 Orsay, France -- [Desesquelles, P. -- Dosme, N. -- Karkour, N. -- Ljungvall, J.] CNRS, CSNSM, IN2P3, F-91405 Orsay, France -- [Gorgen, A.] Univ Oslo, Dept Phys, Oslo, Norway -- [Jaworski, G.] Warsaw Univ Technol, Fac Phys, PL-00662 Warsaw, Poland -- [Jaworski, G.] Univ Warsaw, Heavy Ion Lab, PL-02093 Warsaw, Poland -- [Joshi, P.] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England -- [Jungclaus, A.] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain -- [Kempley, R. S. -- Podolyak, Zs. -- Regan, P. H.] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England -- [Mengoni, D. -- Smith, J. F.] Univ W Scotland, Sch Engn, Paisley PA1 2BE, Renfrew, Scotland -- [Quintana, B.] Univ Salamanca, Lab Radiac Ionizantes, E-37008 Salamanca, Spain -- [Redon, N. -- Stezowski, O.] Univ Lyon 1, CNRS IN2P3, IPNL, F-69622 Villeurbanne, France -- [Simpson, J.] STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England -- [Tonev, D.] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia 1784, Bulgaria, Poves, Alfredo -- 0000-0001-7539-388X, Menegazzo, Roberto -- 0000-0002-3060-5276, Calore, Enrico -- 0000-0002-2301-3838, Gadea, Andres -- 0000-0002-4233-1970, Tonev, Dimitar -- 0000-0003-4431-6157, KORTEN, Wolfram -- 0000-0002-3940-0816, Napoli, Daniel Ricardo -- 0000-0002-8154-6958, Jaworski, Grzegorz -- 0000-0003-2241-0329, Cederwall, Bo -- 0000-0003-1771-2656, THEISEN, Christophe -- 0000-0002-8509-1022, Unsworth, Carl -- 0000-0002-4100-7466, Soderstrom, Par-Anders -- 0000-0002-9504-2814, Bednarczyk, Piotr -- 0000-0002-5699-5292, GOTTARDO, Andrea -- 0000-0002-0390-5767, Pullia, Alberto -- 0000-0002-6393-747X, Robinson, Andrew -- 0000-0002-2510-1321, Gorgen, Andreas -- 0000-0003-1916-9941, Recchia, Francesco -- 0000-0002-8428-0112, Sahin, Eda -- 0000-0003-0683-5140, and Sabire Yazıcı Fen Edebiyat Fakültesi
Abstract: WOS: 000311537600003, High-spin states of K-40 have been populated in the fusion-evaporation reaction C-12(Si-30,np)K-40 and studied by means of gamma-ray spectroscopy techniques using one triple-cluster detector of the Advanced Gamma Tracking Array at the Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro. Several states with excitation energy up to 8 MeV and spin up to 10(-) have been discovered. These states are discussed in terms of J = 3 and T = 0 neutron-proton hole pairs. Shell-model calculations in a large model space have shown good agreement with the experimental data for most of the energy levels. The evolution of the structure of this nucleus is here studied as a function of excitation energy and angular momentum., EURONS AGATA [506065-R113]; Swedish Research Council [621-2008-4163, 621-2011-4522, 822-2005-3332, 821-2010-6024]; Japan Society for the Promotion of Science (JSPS) Kakenhi [23.01752]; Ankara University [05B4240002]; Polish Ministry of Science and Higher Education [DPN/N190/AGATA/2009, N N202 073935]; German BMBF [06K-167, 06KY205I, 06KY9136I]; Knut and Alice Wallenberg Foundation [2005.0184]; STFC (UK); MICINN, Spain; INFN, Italy [AIC-D-2011-0746]; Generalitat Valenciana, Spain [PROMETEO/2010/101]; MICINN, Spain [FPA2011-29854]; Comunidad de Madrid (Spain) [HEPHACOS S2009-ESP-1473]; Center for Advanced Studies of Warsaw University of Technology; Goran Gustafsson Foundation; Science and Technology Facilities Council [ST/G000727/1, ST/F004060/1, ST/I504959/1, ST/J000159/1, NuSTAR, ST/I504916/1, ST/J000108/1, ST/F004052/1, ST/J000094/1, ST/F004192/1, ST/F006950/1, ST/J000051/1], We thank the Swedish National Infrastructure for Computing (SNIC) and the Uppsala Multidisciplinary Center for Advanced Computational Science (UPPMAX) for the computer resources used in parts of the analysis. This work was financed by EURONS AGATA (Contract No. 506065-R113), the Swedish Research Council under Contracts No. 621-2008-4163, No. 621-2011-4522, No. 822-2005-3332, and No. 821-2010-6024, the Japan Society for the Promotion of Science (JSPS) Kakenhi Grant No. 23.01752, Ankara University (BAP Project No. 05B4240002), the Polish Ministry of Science and Higher Education under Grants No. DPN/N190/AGATA/2009 and No. N N202 073935, the German BMBF under Grants No. 06K-167, No. 06KY205I, and No. 06KY9136I, the Knut and Alice Wallenberg Foundation Contract No. 2005.0184, and STFC (UK). A. Gadea and E. Farnea acknowledge the support of MICINN, Spain, and INFN, Italy, through the AIC-D-2011-0746 bilateral action. A. Gadea's activity has been partially supported by the Generalitat Valenciana, Spain, under Grant PROMETEO/2010/101. A. Gadea, A. Jungclaus, A. Poves, and B. Quintana acknowledge support from the MICINN, Spain, under Grant FPA2011-29854. A. Poves is partially supported by the Comunidad de Madrid (Spain) (HEPHACOS S2009-ESP-1473). G. Jaworski acknowledges the support of the Center for Advanced Studies of Warsaw University of Technology. B. Cederwall acknowledges the support of the Goran Gustafsson Foundation.
Published: 2012

13. Lifetime measurements in Pd-102: Searching for empirical proof of the E(5) critical-point symmetry in nuclear structure

Author: Konstantinopoulos, T., Ashley, S. F., Axiotis, M., Spyrou, A., Harissopulos, S., Dewald, A., Litzinger, J., Moeller, O., Mueller-Gatterman, C., Petkov, P., Napoli, D. R., Marginean, N., de Angelis, G., Ur, C. A., Bazzacco, D., Farnea, E., Lenzi, S. M., Vlastou, R., Balabanski, D., Konstantinopoulos, T., Ashley, S. F., Axiotis, M., Spyrou, A., Harissopulos, S., Dewald, A., Litzinger, J., Moeller, O., Mueller-Gatterman, C., Petkov, P., Napoli, D. R., Marginean, N., de Angelis, G., Ur, C. A., Bazzacco, D., Farnea, E., Lenzi, S. M., Vlastou, R., and Balabanski, D.
Abstract: Lifetimes of yrast and nonyrast states of Pd-102 populated via the Zr-92(C-13, 3n) reaction are measured by means of the recoil distance Doppler-shift technique with a Cologne plunger coupled to a GASP spectrometer. The event-by-event data accumulated at 24 plunger distances in the range of 0.1 mu m to 9 mm are analyzed using the differential decay curve method. The resulting B(E2) values of the gamma transitions depopulating yrast-band members up to the I-pi = 8(+) state are found to deviate significantly from the corresponding predictions of the E(5) critical-point symmetry.
Published: 2016

14. Pygmy dipole resonance in Ce-140 via inelastic scattering of O-17

Author: Krzysiek, M., Kmiecik, M., Maj, A., Bednarczyk, P., Bracco, A., Crespi, F. C. L., Lanza, E. G., Litvinova, E., Paar, N., Avigo, R., Bazzacco, D., Benzoni, G., Birkenbach, B., Blasi, N., Bottoni, S., Brambilla, S., Camera, F., Ceruti, S., Ciemala, M., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., Isocarte, R., Jungclaus, A., Leoni, S., Ljungvall, J., Lunardi, S., Mazurek, K., Menegazzo, R., Mengoni, D., Michelagnoli, C., Milion, B., Morales, A. I., Napoli, D. R., Nicolini, R., Pellegri, L., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Salsac, M. D., Siebeck, B., Siem, S., Soderstrom, P. -A., Ur, C., Valiente-Dobon, J. J., Wieland, O., Zieblinski, M., Krzysiek, M., Kmiecik, M., Maj, A., Bednarczyk, P., Bracco, A., Crespi, F. C. L., Lanza, E. G., Litvinova, E., Paar, N., Avigo, R., Bazzacco, D., Benzoni, G., Birkenbach, B., Blasi, N., Bottoni, S., Brambilla, S., Camera, F., Ceruti, S., Ciemala, M., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., Isocarte, R., Jungclaus, A., Leoni, S., Ljungvall, J., Lunardi, S., Mazurek, K., Menegazzo, R., Mengoni, D., Michelagnoli, C., Milion, B., Morales, A. I., Napoli, D. R., Nicolini, R., Pellegri, L., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Salsac, M. D., Siebeck, B., Siem, S., Soderstrom, P. -A., Ur, C., Valiente-Dobon, J. J., Wieland, O., and Zieblinski, M.
Abstract: The gamma decay from the high-lying states of Ce-140 excited via inelastic scattering of O-17 at a bombarding energy of 340 MeV was measured using the high-resolution AGATA-demonstrator array in coincidence with scattered ions detected in two segmented Delta E-E silicon detectors. Angular distributions of scattered ions and emitted gamma rays were measured, as well as their differential cross sections. The excitation of 1(-) states below the neutron separation energy is similar to the one obtained in reactions with the alpha isoscalar probe. The comparison between the experimental differential cross sections and the corresponding predictions using the distorted-wave Born approximation allowed us to extract the isoscalar component of identified 1(-) pygmy states. For this analysis the form factor obtained by folding microscopically calculated transition densities and optical potentials was used.
Published: 2016

15. Superdeformed and Triaxial States in Ca-42

Author: Hadynska-Klek, K., Napiorkowski, P. J., Zielinska, M., Srebrny, J., Maj, A., Azaiez, F., Dobon, J. J. Valiente, Kicinska-Habior, M., Nowacki, F., Naidja, H., Bounthong, B., Rodriguez, T. R., de Angelis, G., Abraham, T., Kumar, G. Anil, Bazzacco, D., Bellato, M., Bortolato, D., Bednarczyk, P., Benzoni, G., Berti, L., Birkenbach, B., Bruyneel, B., Brambilla, S., Camera, F., Chavas, J., Cederwall, B., Charles, L., Ciemala, M., Cocconi, P., Coleman-Smith, P., Colombo, A., Corsi, A., Crespi, F. C. L., Cullen, D. M., Czermak, A., Desesquelles, P., Doherty, D. T., Dulny, B., Eberth, J., Farnea, E., Fornal, B., Franchoo, S., Gadea, A., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Gorgen, A., Gulmini, M., Habermann, T., Hess, H., Isocrate, R., Iwanicki, J., Jaworski, G., Judson, D. S., Jungclaus, A., Karkour, N., Kmiecik, M., Karpinski, D., Kisielinski, M., Kondratyev, N., Korichi, A., Komorowska, M., Kowalczyk, M., Korten, W., Krzysiek, M., Lehaut, G., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lunardi, S., Maron, G., Mazurek, K., Menegazzo, R., Mengoni, D., Merchan, E., Eczynski, W. M., Michelagnoli, C., Mierzejewski, J., Million, B., Myalski, S., Napoli, D. R., Nicolini, R., Niikura, M., Obertelli, A., Ozmen, S. F., Palacz, M., Prochniak, L., Pullia, A., Quintana, B., Rampazzo, G., Recchia, F., Redon, N., Reiter, P., Rosso, D., Rusek, K., Sahin, E., Salsac, M. -D., Soderstrom, P. -A., Stefan, I., Stezowski, O., Styczen, J., Theisen, Ch., Toniolo, N., Ur, C. A., Vandone, V., Wadsworth, R., Wasilewska, B., Wiens, A., Wood, J. L., Wrzosek-Lipska, K., Zieblinski, M., Hadynska-Klek, K., Napiorkowski, P. J., Zielinska, M., Srebrny, J., Maj, A., Azaiez, F., Dobon, J. J. Valiente, Kicinska-Habior, M., Nowacki, F., Naidja, H., Bounthong, B., Rodriguez, T. R., de Angelis, G., Abraham, T., Kumar, G. Anil, Bazzacco, D., Bellato, M., Bortolato, D., Bednarczyk, P., Benzoni, G., Berti, L., Birkenbach, B., Bruyneel, B., Brambilla, S., Camera, F., Chavas, J., Cederwall, B., Charles, L., Ciemala, M., Cocconi, P., Coleman-Smith, P., Colombo, A., Corsi, A., Crespi, F. C. L., Cullen, D. M., Czermak, A., Desesquelles, P., Doherty, D. T., Dulny, B., Eberth, J., Farnea, E., Fornal, B., Franchoo, S., Gadea, A., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Gorgen, A., Gulmini, M., Habermann, T., Hess, H., Isocrate, R., Iwanicki, J., Jaworski, G., Judson, D. S., Jungclaus, A., Karkour, N., Kmiecik, M., Karpinski, D., Kisielinski, M., Kondratyev, N., Korichi, A., Komorowska, M., Kowalczyk, M., Korten, W., Krzysiek, M., Lehaut, G., Leoni, S., Ljungvall, J., Lopez-Martens, A., Lunardi, S., Maron, G., Mazurek, K., Menegazzo, R., Mengoni, D., Merchan, E., Eczynski, W. M., Michelagnoli, C., Mierzejewski, J., Million, B., Myalski, S., Napoli, D. R., Nicolini, R., Niikura, M., Obertelli, A., Ozmen, S. F., Palacz, M., Prochniak, L., Pullia, A., Quintana, B., Rampazzo, G., Recchia, F., Redon, N., Reiter, P., Rosso, D., Rusek, K., Sahin, E., Salsac, M. -D., Soderstrom, P. -A., Stefan, I., Stezowski, O., Styczen, J., Theisen, Ch., Toniolo, N., Ur, C. A., Vandone, V., Wadsworth, R., Wasilewska, B., Wiens, A., Wood, J. L., Wrzosek-Lipska, K., and Zieblinski, M.
Abstract: Shape parameters of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca-42 were determined from E2 matrix elements measured in the first low-energy Coulomb excitation experiment performed with AGATA. The picture of two coexisting structures is well reproduced by new state-of-the-art large-scale shell model and beyond-mean-field calculations. Experimental evidence for superdeformation of the band built on 0(2)(+) has been obtained and the role of triaxiality in the A similar to 40 mass region is discussed. Furthermore, the potential of Coulomb excitation as a tool to study superdeformation has been demonstrated for the first time.
Published: 2016

16. High-spin structure of Xe-134

Author: Vogt, A., Birkenbach, B., Reiter, P., Blazhev, A., Siciliano, M., Valiente-Dobon, J. J., Wheldon, C., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Chakrawarthy, R. S., Chapman, R., Cline, D., Corradi, L., Crespi, F. C. L., Cromaz, M., de Angelis, G., Eberth, J., Fallon, P., Farnea, E., Fioretto, E., Freeman, S. J., Gadea, A., Geibel, K., Gelletly, W., Gengelbach, A., Giaz, A., Gorgen, A., Gottardo, A., Hayes, A. B., Hess, H., Hua, H., John, P. R., Jolie, J., Jungclaus, A., Korten, W., Lee, I. Y., Leoni, S., Liang, X., Lunardi, S., Macchiavelli, A. O., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Pearson, C. J., Pellegri, L., Podolyak, Zs., Pollarolo, G., Pullia, A., Radeck, F., Recchia, F., Regan, P. H., Sahin, E., Scarlassara, F., Sletten, G., Smith, J. F., Soderstrom, P. -A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Teng, R., Ur, C., Vandone, V., Ward, D., Warner, D. D., Wiens, A., Wu, C. Y., Vogt, A., Birkenbach, B., Reiter, P., Blazhev, A., Siciliano, M., Valiente-Dobon, J. J., Wheldon, C., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Chakrawarthy, R. S., Chapman, R., Cline, D., Corradi, L., Crespi, F. C. L., Cromaz, M., de Angelis, G., Eberth, J., Fallon, P., Farnea, E., Fioretto, E., Freeman, S. J., Gadea, A., Geibel, K., Gelletly, W., Gengelbach, A., Giaz, A., Gorgen, A., Gottardo, A., Hayes, A. B., Hess, H., Hua, H., John, P. R., Jolie, J., Jungclaus, A., Korten, W., Lee, I. Y., Leoni, S., Liang, X., Lunardi, S., Macchiavelli, A. O., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Pearson, C. J., Pellegri, L., Podolyak, Zs., Pollarolo, G., Pullia, A., Radeck, F., Recchia, F., Regan, P. H., Sahin, E., Scarlassara, F., Sletten, G., Smith, J. F., Soderstrom, P. -A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Teng, R., Ur, C., Vandone, V., Ward, D., Warner, D. D., Wiens, A., and Wu, C. Y.
Abstract: Detailed spectroscopic information on the N similar to 82 nuclei is necessary to benchmark shell-model calculations in the region. The nuclear structure above long-lived isomers in Xe-134 is investigated after multinucleon transfer (MNT) and actinide fission. Xenon-134 was populated as (i) a transfer product in Xe-136 + U-238 and Xe-136 + Pb-208 MNT reactions and (ii) as a fission product in the Xe-136 + U-238 reaction employing the high-resolution Advanced Gamma Tracking Array (AGATA). Trajectory reconstruction has been applied for the complete identification of beamlike transfer products with the magnetic spectrometer PRISMA. The Xe-136 + Pt-198 MNT reaction was studied with the gamma-ray spectrometer GAMMASPHERE in combination with the gas detector array Compact Heavy Ion Counter (CHICO). Several high-spin states in Xe-134 on top of the two long-lived isomers are discovered based on gamma gamma-coincidence relationships and information on the gamma-ray angular distributions as well as excitation energies from the total kinetic energy loss and fission fragments. The revised level scheme of Xe-134 is extended up to an
Published: 2016

17. Isomeric decay spectroscopy of the Bi-217 isotope

Author: Gottardo, Andrea, Valiente Dobon, J. J., Benzoni, G., Lunardi, Santo, Gadea, A., Algora, A., Al Dahan, N., de Angelis, G., Ayyad, Y., Bazzacco, D., Benlliure, J., Boutachkov, P., Bowry, M., Bracco, A., Bruce, A. M., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Denis Bacelar, A. M., Deo, A. Y., Domingo Pardo, C., Doncel, M., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., G?rska, M., Grebosz, J., Gregor, E., Habermann, T., Hoischen, R., Janik, R., John, P. R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, SILVIA MONICA, Leoni, S., Mandal, S., Menegazzo, R., Mengoni, Daniele, Million, B., Modamio, V., Morales, A. I., Napoli, D. R., Naqvi, F., Nicolini, R., Nociforo, C., Pf?tzner, M., Pietri, S., Podolyak, Z. s., Prochazka, A., Prokopowicz, W., Recchia, Francesco, Regan, P. H., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., C. A., Ur, Walker, P. M., Weick, H., Wieland, O., and Wollersheim, H. J.
Published: 2014

18. 1(-) and 2(+) discrete states in Zr-90 populated via the (O-17, O-17 'gamma) reaction

Author: Crespi, F. C. L., Bracco, A., Nicolini, R., Lanza, E. G., Vitturi, A., Mengoni, D., Leoni, S., Benzoni, G., Blasi, N., Boiano, C., Bottoni, S., Brambilla, S., Camera, F., Corsi, A., Giaz, A., Million, B., Pellegri, L., Vandone, V., Wieland, O., Bednarczyk, P., Ciemala, M., Kmiecik, M., Krzysiek, M., Maj, A., Bazzacco, D., Bellato, M., Birkenbach, B., Bortolato, D., Calore, E., Cederwall, B., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Goergen, A., Gottardo, A., Hess, H., Isocrate, R., Jolie, J., Jungclaus, A., Kempley, R. S., Labiche, M., Menegazzo, R., Michelagnoli, C., Molini, P., Napoli, D. R., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Sahin, E., Siem, S., Soederstroem, P. -A., Stezowski, O., Theisen, Ch., Ur, C., Valiente-Dobon, J. J., Crespi, F. C. L., Bracco, A., Nicolini, R., Lanza, E. G., Vitturi, A., Mengoni, D., Leoni, S., Benzoni, G., Blasi, N., Boiano, C., Bottoni, S., Brambilla, S., Camera, F., Corsi, A., Giaz, A., Million, B., Pellegri, L., Vandone, V., Wieland, O., Bednarczyk, P., Ciemala, M., Kmiecik, M., Krzysiek, M., Maj, A., Bazzacco, D., Bellato, M., Birkenbach, B., Bortolato, D., Calore, E., Cederwall, B., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Goergen, A., Gottardo, A., Hess, H., Isocrate, R., Jolie, J., Jungclaus, A., Kempley, R. S., Labiche, M., Menegazzo, R., Michelagnoli, C., Molini, P., Napoli, D. R., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Sahin, E., Siem, S., Soederstroem, P. -A., Stezowski, O., Theisen, Ch., Ur, C., and Valiente-Dobon, J. J.
Abstract: 2(+) and 1(-) states in Zr-90 were populated via the (O-17, O-17 'gamma) reaction at 340 MeV. The gamma decay was measured with high resolution using the AGATA (advanced gamma tracking array demonstrator array). Differential cross sections were obtained at few different angles for the scattered particle. The results of the elastic scattering and inelastic excitation of 2(+), 3(,)(-) and 1(-) states are compared with distorted-wave Born approximation (DWBA) calculations, using both the standard collective form factor and a form factor obtained by folding microscopically calculated transition densities. This allowed to extract the isoscalar component of the 1(-) state at 6.424 MeV. The comparison of the present (17O, 17O 'gamma) data with existing (gamma,gamma') and (p, p') data in the corresponding region of the gamma continuum (6-11 MeV), characterized by a large E1 component, shows completely different behaviors of the cross section as a function of the nuclear excitation energy. The comparison of the data with DWBA calculations suggests a decrease of the isoscalar strength in the cross section with increasing excitation energy.
Published: 2015

19. Shell evolution beyond N=40: Cu-69,Cu-71,Cu-73

Author: Sahin, E., Doncel, M., Sieja, K., de Angelis, G., Gadea, A., Quintana, B., Gorgen, A., Modamio, V., Mengoni, D., Valiente-Dobon, J. J., John, P. R., Albers, M., Bazzacco, D., Benzoni, G., Birkenbach, B., Cederwall, B., Clement, E., Curien, D., Corradi, L., Desesquelles, P., Dewald, A., Didierjean, F., Duchene, G., Eberth, J., Erduran, M. N., Farnea, E., Fioretto, E., de France, G., Fransen, C., Gernhaeuser, R., Gottardo, A., Hackstein, M., Hagen, T., Hernandez-Prieto, A., Hess, H., Hueyuek, T., Jungclaus, A., Klupp, S., Korten, W., Kusoglu, A., Lenzi, S. M., Ljungvall, J., Louchart, C., Lunardi, S., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Million, B., Molini, P., Montagnoli, G., Montanari, D., Moeller, O., Napoli, D. R., Obertelli, A., Orlandi, R., Pollarolo, G., Pullia, A., Recchia, F., Reiter, P., Rosso, D., Rother, W., Salsac, M. -D., Scarlassara, F., Schlarb, M., Siem, S., Singh, Pushpendra P., Soderstrom, P. -A., Stefanini, A. M., Stezowski, O., Sulignano, B., Szilner, S., Theisen, Ch, Ur, C. A., Yalcinkaya, M., Sahin, E., Doncel, M., Sieja, K., de Angelis, G., Gadea, A., Quintana, B., Gorgen, A., Modamio, V., Mengoni, D., Valiente-Dobon, J. J., John, P. R., Albers, M., Bazzacco, D., Benzoni, G., Birkenbach, B., Cederwall, B., Clement, E., Curien, D., Corradi, L., Desesquelles, P., Dewald, A., Didierjean, F., Duchene, G., Eberth, J., Erduran, M. N., Farnea, E., Fioretto, E., de France, G., Fransen, C., Gernhaeuser, R., Gottardo, A., Hackstein, M., Hagen, T., Hernandez-Prieto, A., Hess, H., Hueyuek, T., Jungclaus, A., Klupp, S., Korten, W., Kusoglu, A., Lenzi, S. M., Ljungvall, J., Louchart, C., Lunardi, S., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Million, B., Molini, P., Montagnoli, G., Montanari, D., Moeller, O., Napoli, D. R., Obertelli, A., Orlandi, R., Pollarolo, G., Pullia, A., Recchia, F., Reiter, P., Rosso, D., Rother, W., Salsac, M. -D., Scarlassara, F., Schlarb, M., Siem, S., Singh, Pushpendra P., Soderstrom, P. -A., Stefanini, A. M., Stezowski, O., Sulignano, B., Szilner, S., Theisen, Ch, Ur, C. A., and Yalcinkaya, M.
Abstract: The level structure of the neutron-rich Cu-69, Cu-71, and Cu-73 isotopes has been investigated by means of multinucleon transfer reactions. The experiment was performed at Laboratori Nazionali di Legnaro using the AGATA Demonstrator array coupled to the PRISMA magnetic spectrometer. Lifetimes of excited states in Cu nuclei were measured with the recoil-distance Doppler-shift method. The resulting electromagnetic matrix elements for transitions from excited states in Cu-69,Cu-71,Cu-73 nuclei are used to assess the collective or single-particle character of these states. The results are compared with predictions of large-scale shell-model calculations, giving further insight into the evolution of the proton pf shell as neutrons fill the 1g(9/2) orbital.
Published: 2015

20. Multitude of 2(+) discrete states in Sn-124 observed via the (O-17, O-17 'gamma) reaction: Evidence for pygmy quadrupole states

Author: Pellegri, L., Bracco, A., Tsoneva, N., Avigo, R., Benzoni, G., Blasi, N., Bottoni, S., Camera, F., Ceruti, S., Crespi, F. C. L., Giaz, A., Leoni, S., Lenske, H., Million, B., Morales, A. I., Nicolini, R., Wieland, O., Bazzacco, D., Bednarczyk, P., Birkenbach, B., Ciemala, M., de Angelis, G., Farnea, E., Gadea, A., Goergen, A., Gottardo, A., Grebosz, J., Isocrate, R., Kmiecik, M., Krzysiek, M., Lunardi, S., Maj, A., Mazurek, K., Mengoni, D., Michelagnoli, C., Napoli, D. R., Recchia, F., Siebeck, B., Siem, S., Ur, C., Valiente-Dobon, J. J., Pellegri, L., Bracco, A., Tsoneva, N., Avigo, R., Benzoni, G., Blasi, N., Bottoni, S., Camera, F., Ceruti, S., Crespi, F. C. L., Giaz, A., Leoni, S., Lenske, H., Million, B., Morales, A. I., Nicolini, R., Wieland, O., Bazzacco, D., Bednarczyk, P., Birkenbach, B., Ciemala, M., de Angelis, G., Farnea, E., Gadea, A., Goergen, A., Gottardo, A., Grebosz, J., Isocrate, R., Kmiecik, M., Krzysiek, M., Lunardi, S., Maj, A., Mazurek, K., Mengoni, D., Michelagnoli, C., Napoli, D. R., Recchia, F., Siebeck, B., Siem, S., Ur, C., and Valiente-Dobon, J. J.
Abstract: A multitude of discrete 2(+) states in Sn-124 with energy up to 5 MeV were populated and identified with the (O-17, O-17'gamma) reaction at 340 MeV. Cross sections were compared with distorted wave Born approximation predictions and in general a good agreement was found. The measured energy and intensity distributions of the 2(+) states are very similar to the predictions based on self-consistent density functional theory and extended QRPA approach accounting for multiphonon degrees of freedom. This provides evidence of the excitation of the pygmy quadrupole resonance in skin nuclei.
Published: 2015

21. Light and heavy transfer products in Xe-136+U-238 multinucleon transfer reactions

Author: Vogt, A., Birkenbach, B., Reiter, P., Corradi, L., Mijatovic, T., Montanari, D., Szilner, S., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Geibel, K., Gengelbach, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P. R., Jolie, J., Judson, D. S., Jungclaus, A., Korten, W., Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Montagnoli, G., Napoli, D., Pellegri, L., Pollarolo, G., Pullia, A., Quintana, B., Radeck, F., Recchia, F., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstrom, P-A, Stefanini, A. M., Steinbach, T., Stezowski, O., Szpak, B., Theisen, Ch., Ur, C., Valiente-Dobon, J. J., Vandone, V., Wiens, A., Vogt, A., Birkenbach, B., Reiter, P., Corradi, L., Mijatovic, T., Montanari, D., Szilner, S., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Geibel, K., Gengelbach, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P. R., Jolie, J., Judson, D. S., Jungclaus, A., Korten, W., Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Montagnoli, G., Napoli, D., Pellegri, L., Pollarolo, G., Pullia, A., Quintana, B., Radeck, F., Recchia, F., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstrom, P-A, Stefanini, A. M., Steinbach, T., Stezowski, O., Szpak, B., Theisen, Ch., Ur, C., Valiente-Dobon, J. J., Vandone, V., and Wiens, A.
Abstract: Background: Multinucleon transfer reactions (MNT) are a competitive tool to populate exotic neutron-rich nuclei in a wide region of nuclei, where other production methods have severe limitations or cannot be used at all. Purpose: Experimental information on the yields of MNT reactions in comparison with theoretical calculations are necessary to make predictions for the production of neutron-rich heavy nuclei. It is crucial to determine the fraction of MNT reaction products which are surviving neutron emission or fission at the high excitation energy after the nucleon exchange. Method: Multinucleon transfer reactions in Xe-136 + U-238 have been measured in a high-resolution gamma-ray/particle coincidence experiment. The large solid-angle magnetic spectrometer PRISMA coupled to the high-resolution Advanced Gamma Tracking Array (AGATA) has been employed. Beamlike reaction products after multinucleon transfer in the Xe region were identified and selected with the PRISMA spectrometer. Coincident particles were tagged by multichannel plate detectors placed at the grazing angle of the targetlike recoils inside the scattering chamber. Results: Mass yields have been extracted and compared with calculations based on the GRAZING model for MNT reactions. Kinematic coincidences between the binary reaction products, i.e., beamlike and targetlike nuclei, were exploited to obtain population yields for nuclei in the actinide region and compared to x-ray yields measured by AGATA. Conclusions: No sizable yield of actinide nuclei beyond Z = 93 is found to perform nuclear structure investigations. In-beam gamma-ray spectroscopy is feasible for few-neutron transfer channels in U and the -2p channel populating Th isotopes.
Published: 2015

22. Spectroscopy of the neutron-rich actinide nucleus U-240 following multinucleon-transfer reactions

Author: Birkenbach, B., Vogt, A., Geibel, K., Recchia, F., Reiter, P., Valiente-Dobon, J. J., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Gengelbach, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P. R., Jolie, J., Judson, D. S., Jungclaus, A., Korten, W., Lenzi, S., Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Pellegri, L., Pollarolo, G., Pullia, A., Quintana, B., Radeck, F., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstrom, P. -A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Theisen, Ch, Ur, C., Vandone, V., Wiens, A., Birkenbach, B., Vogt, A., Geibel, K., Recchia, F., Reiter, P., Valiente-Dobon, J. J., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Gengelbach, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P. R., Jolie, J., Judson, D. S., Jungclaus, A., Korten, W., Lenzi, S., Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Pellegri, L., Pollarolo, G., Pullia, A., Quintana, B., Radeck, F., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstrom, P. -A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Theisen, Ch, Ur, C., Vandone, V., and Wiens, A.
Abstract: Background: Nuclear structure information for the neutron-rich actinide nuclei is important since it is the benchmark for theoretical models that provide predictions for the heaviest nuclei. Purpose: gamma-ray spectroscopy of neutron-rich heavy nuclei in the actinide region. Method: Multinucleon-transfer reactions in Zn-70 + U-238 and Xe-136 + U-238 have been measured in two experiments performed at the INFN Legnaro, Italy. In the Zn-70 experiment the high-resolution HPGe Clover Array (CLARA) coupled to the magnetic spectrometer PRISMA was employed. In the Xe-136 experiment the high-resolution Advanced Gamma Tracking Array (AGATA) was used in combination with PRISMA and the Detector Array for Multinucleon Transfer Ejectiles (DANTE). Results: The ground-state band (g.s. band) of U-240 was measured up to the 20(+) level and a tentative assignment was made up to the (24(+)) level. Results from gamma gamma coincidence and from particle coincidence analyses are shown. Moments of inertia (MoI) show a clear upbend. Evidence for an extended first negative-parity band of U-240 is found. Conclusions: A detailed comparison with latest calculations shows best agreement with cranked relativistic Hartree-Bogoliubov (CRHB) calculations for the g.s. band properties. The negative-parity band shows the characteristics of a K-pi = 0 band based on an octupole vibration.
Published: 2015

23. Isospin Mixing in Zr-80: From Finite to Zero Temperature

Author: 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., Desesquelles, P., Eberth, J., Farnea, E., Goergen, 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., Soderstrom, P. -A., Stezowski, O., Theisen, Ch., Ur, C., Valiente-Dobon, J. J., Zieblinski, M., 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., Desesquelles, P., Eberth, J., Farnea, E., Goergen, 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., Soderstrom, P. -A., Stezowski, O., Theisen, Ch., Ur, C., Valiente-Dobon, J. J., and Zieblinski, M.
Abstract: 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.
Published: 2015

24. Transition probabilities in neutron-rich Se-84,Se-86

Author: Litzinger, J., Blazhev, A., Dewald, A., Didierjean, F., Duchene, G., Fransen, C., Lozeva, R., Sieja, K., Verney, D., de Angelis, G., Bazzacco, D., Birkenbach, B., Bottoni, S., Bracco, A., Braunroth, T., Cederwall, B., Corradi, L., Crespi, F. C. L., Desesquelles, P., Eberth, J., Ellinger, E., Farnea, E., Fioretto, E., Gernhaeuser, R., Goasduff, A., Goergen, A., Gottardo, A., Grebosz, J., Hackstein, M., Hess, H., Ibrahim, F., Jolie, J., Jungclaus, A., Kolos, K., Korten, W., Leoni, S., Lunardi, S., Maj, A., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Million, B., Moeller, O., Modamio, V., Montagnoli, G., Montanari, D., Morales, A. I., Napoli, D. R., Niikura, M., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soederstroem, P. -A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Dobon, J. J. Valiente, Vandone, V., Vogt, A., Litzinger, J., Blazhev, A., Dewald, A., Didierjean, F., Duchene, G., Fransen, C., Lozeva, R., Sieja, K., Verney, D., de Angelis, G., Bazzacco, D., Birkenbach, B., Bottoni, S., Bracco, A., Braunroth, T., Cederwall, B., Corradi, L., Crespi, F. C. L., Desesquelles, P., Eberth, J., Ellinger, E., Farnea, E., Fioretto, E., Gernhaeuser, R., Goasduff, A., Goergen, A., Gottardo, A., Grebosz, J., Hackstein, M., Hess, H., Ibrahim, F., Jolie, J., Jungclaus, A., Kolos, K., Korten, W., Leoni, S., Lunardi, S., Maj, A., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Million, B., Moeller, O., Modamio, V., Montagnoli, G., Montanari, D., Morales, A. I., Napoli, D. R., Niikura, M., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soederstroem, P. -A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Dobon, J. J. Valiente, Vandone, V., and Vogt, A.
Abstract: Reduced quadrupole transition probabilities for low-lying transitions in neutron-rich Se-84,Se-86 are investigated with a recoil distance Doppler shift (RDDS) experiment. The experiment was performed at the Istituto Nazionale di Fisica Nucleare (INFN) Laboratori Nazionali di Legnaro using the Cologne Plunger device for the RDDS technique and the AGATA Demonstrator array for the gamma-ray detection coupled to the PRISMA magnetic spectrometer for an event-by-event particle identification. In Se-86 the level lifetime of the yrast 2(1)(+) state and an upper limit for the lifetime of the 4(1)(+) state are determined for the first time. The results of Se-86 are in agreement with previously reported predictions of large-scale shell-model calculations using Ni78-I and Ni78-II effective interactions. In addition, intrinsic shape parameters of lowest yrast states in Se-86 are calculated. In semimagic Se-84 level lifetimes of the yrast 4(1)(+) and 6(1)(+) states are determined for the first time. Large-scale shell-model calculations using effective interactions Ni78-II, JUN45, jj4b, and jj4pna are performed. The calculations describe B(E2; 2(1)(+) -> 0(1)(+)) and B(E2; 6(1)(+) -> 4(1)(+)) fairly well and point out problems in reproducing the experimental B(E2; 4(1)(+) -> 2(1)(+)).
Published: 2015

25. Population of the 2(ms)(+) mixed-symmetry state of Ba-140 with the alpha-transfer reaction

Author: Stahl, C., Leske, J., Bauer, C., Bazzacco, D., Farnea, E., Gottardo, A., John, P. R., Michelagnoli, C., Pietralla, N., Reese, M., Sahin, E., Birkenbach, B., Bracco, A., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Gadea, A., Goergen, A., Grebosz, J., Hess, H., Jolie, J., Jungclaus, A., Korten, W., Lenzi, S. M., Lunardi, S., Menegazzo, R., Mengoni, D., Modamio, V., Napoli, D. R., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Salsac, M. D., Soderstrom, P. -A., Stezowski, O., Theisen, Ch., Ur, C. A., Valiente-Dobon, J. J., Stahl, C., Leske, J., Bauer, C., Bazzacco, D., Farnea, E., Gottardo, A., John, P. R., Michelagnoli, C., Pietralla, N., Reese, M., Sahin, E., Birkenbach, B., Bracco, A., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Gadea, A., Goergen, A., Grebosz, J., Hess, H., Jolie, J., Jungclaus, A., Korten, W., Lenzi, S. M., Lunardi, S., Menegazzo, R., Mengoni, D., Modamio, V., Napoli, D. R., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Salsac, M. D., Soderstrom, P. -A., Stezowski, O., Theisen, Ch., Ur, C. A., and Valiente-Dobon, J. J.
Abstract: Background: Identification of proton-neutron mixed-symmetric one-quadrupole phonon excitations (the 2(ms)(+) states) of atomic nuclei provides information on the isovector part of the residual nucleon-nucleon interaction. It was predicted that the 2(ms)(+) state of particular nuclei close to the U(5) limit of the interacting boson model, in particular Ba-140, should be considerably populated by alpha-transfer reactions [C. E. Alonso et al., Phys. Rev. C 78, 017301 (2008)]. Purpose: We aim at the identification of the 2(ms)(+) mixed-symmetry state (MSS) of radioactive Ba-140 and investigate its population by the alpha-transfer reaction as a suitable tool to selectively populate MSSs and as a potential new signature for its mixed-symmetric character. Method: A gamma-ray spectroscopy experiment was performed in inverse kinematics in order to populate the 2(ms)(+) state of Ba-140 by alpha-transfer from a C-nat target on Xe-136 beam ions. The population of the candidate for the 2(ms)(+) state of Ba-140 was measured relative to the population of the 2(1)(+) state. Results: The candidate for the 2(ms)(+) state of Ba-140 was populated by a transfer three times weaker than predicted. Another 2(+) state that can be ruled out as the MSS was in turn as strongly populated by the a transfer as predicted for the MSS. Conclusions: The relative population of 2(+) states by alpha-transfer cannot serve as a new signature for MSSs, since other 2(+) states are also strongly populated. Nevertheless, the substantial population of the MSS candidate of Ba-140 by alpha transfer qualifies this type of reaction as suitable tool to excite MSSs and study their electromagnetic decay properties.
Published: 2015

26. Isomeric decay spectroscopy of the Bi-217 isotope

Author: Gottardo, A, Valiente-Dobon, JJ, Benzoni, G, Lunardi, S, Gadea, A, Algora, A, Al-Dahan, N, de Angelis, G, Ayyad, Y, Bazzacco, D, Benlliure, J, Boutachkov, P, Bowry, M, Bracco, A, Bruce, AM, Bunce, M, Camera, F, Casarejos, E, Cortes, ML, Crespi, FCL, Corsi, A, Bacelar, AMD, Deo, AY, Domingo-Pardo, C, Doncel, M, Engert, T, Eppinger, K, Farrelly, GF, Farinon, F, Farnea, E, Geissel, H, Gerl, J, Goel, N, Gorska, M, Grebosz, J, Gregor, E, Habermann, T, Hoischen, R, Janik, R, John, PR, Klupp, S, Kojouharov, I, Kurz, N, Lenzi, SM, Leoni, S, Mandal, S, Menegazzo, R, Mengoni, D, Million, B, Modamio, V, Morales, AI, Napoli, DR, Naqvi, F, Nicolini, R, Nociforo, C, Pfuetzner, M, Pietri, S, Podolyak, Z, Prochazka, A, Prokopowicz, W, Recchia, F, Regan, PH, Reed, MW, Rudolph, D, Sahin, E, Schaffner, H, Sharma, A, Sitar, B, Siwal, D, Steiger, K, Strmen, P, Swan, TPD, Szarka, I, Ur, CA, Walker, PM, Weick, H, Wieland, O, Wollersheim, H-J, Gottardo, A, Valiente-Dobon, JJ, Benzoni, G, Lunardi, S, Gadea, A, Algora, A, Al-Dahan, N, de Angelis, G, Ayyad, Y, Bazzacco, D, Benlliure, J, Boutachkov, P, Bowry, M, Bracco, A, Bruce, AM, Bunce, M, Camera, F, Casarejos, E, Cortes, ML, Crespi, FCL, Corsi, A, Bacelar, AMD, Deo, AY, Domingo-Pardo, C, Doncel, M, Engert, T, Eppinger, K, Farrelly, GF, Farinon, F, Farnea, E, Geissel, H, Gerl, J, Goel, N, Gorska, M, Grebosz, J, Gregor, E, Habermann, T, Hoischen, R, Janik, R, John, PR, Klupp, S, Kojouharov, I, Kurz, N, Lenzi, SM, Leoni, S, Mandal, S, Menegazzo, R, Mengoni, D, Million, B, Modamio, V, Morales, AI, Napoli, DR, Naqvi, F, Nicolini, R, Nociforo, C, Pfuetzner, M, Pietri, S, Podolyak, Z, Prochazka, A, Prokopowicz, W, Recchia, F, Regan, PH, Reed, MW, Rudolph, D, Sahin, E, Schaffner, H, Sharma, A, Sitar, B, Siwal, D, Steiger, K, Strmen, P, Swan, TPD, Szarka, I, Ur, CA, Walker, PM, Weick, H, Wieland, O, and Wollersheim, H-J
Published: 2014

27. beta-decay studies of neutron-rich Tl, Pb, and Bi isotopes

Author: Morales, A. I., Benzoni, G., Gottardo, A., Valiente-Dobon, J. J., Blasi, N., Bracco, A., Camera, F., Crespi, F. C. L., Corsi, A., Leoni, S., Million, B., Nicolini, R., Wieland, O., Gadea, A., Lunardi, S., Gorska, M., Regan, P. H., Podolyak, Zs., Pfuetzner, M., Pietri, S., Boutachkov, P., Weick, H., Grebosz, J., Bruce, A. M., Alcantara Nunez, J., Algora, A., Al-Dahan, N., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bunce, M., Casarejos, E., Cortes, M. L., Bacelar, A. M. Denis, Deo, A. Y., de Angelis, G., Domingo-Pardo, C., Doncel, M., Dombradi, Zs., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, R., Janik, R., Klupp, S., Kojouharov, I., Kurz, N., Mandal, S., Menegazzo, R., Mengoni, D., Napoli, D. R., Naqvi, F., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, F., Ribas, R. V., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Wollersheim, H. -J., Morales, A. I., Benzoni, G., Gottardo, A., Valiente-Dobon, J. J., Blasi, N., Bracco, A., Camera, F., Crespi, F. C. L., Corsi, A., Leoni, S., Million, B., Nicolini, R., Wieland, O., Gadea, A., Lunardi, S., Gorska, M., Regan, P. H., Podolyak, Zs., Pfuetzner, M., Pietri, S., Boutachkov, P., Weick, H., Grebosz, J., Bruce, A. M., Alcantara Nunez, J., Algora, A., Al-Dahan, N., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bunce, M., Casarejos, E., Cortes, M. L., Bacelar, A. M. Denis, Deo, A. Y., de Angelis, G., Domingo-Pardo, C., Doncel, M., Dombradi, Zs., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, R., Janik, R., Klupp, S., Kojouharov, I., Kurz, N., Mandal, S., Menegazzo, R., Mengoni, D., Napoli, D. R., Naqvi, F., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, F., Ribas, R. V., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., and Wollersheim, H. -J.
Abstract: The fragmentation of relativistic uranium projectiles has been exploited at the Gesellschaft fur Schwerionenforschung laboratory to investigate the beta decay of neutron-rich nuclei just beyond Pb-208. This paper reports on beta-delayed gamma decays of Tl211-213, Pb-215, and Bi215-219 de-exciting states in the daughters Pb211-213, Bi-215, and Po215-219. The resulting partial level schemes, proposed with the help of systematics and shell-model calculations, are presented. The role of allowed Gamow-Teller and first-forbidden beta transitions in this mass region is discussed.
Published: 2014

28. Shape evolution in the neutron-rich osmium isotopes: Prompt gamma-ray spectroscopy of Os-196

Author: John, P. R., Modamio, V., Valiente-Dobon, J. J., Mengoni, D., Lunardi, S., Rodriguez, T. R., Bazzacco, D., Gadea, A., Wheldon, C., Alexander, T., de Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Bottoni, S., Bowry, M., Bracco, A., Browne, F., Bunce, M., Camera, F., Cederwall, B., Corradi, L., Crespi, F. C. L., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Goergen, A., Gottardo, A., Grebosz, J., Grente, L., Hess, H., Jungclaus, A., Kokalova, Tz., Korichi, A., Korten, W., Kusoglu, A., Lenzi, S., Leoni, S., Ljungvall, J., Maron, G., Meczynski, W., Melon, B., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Million, B., Molini, P., Montagnoli, G., Montanari, D., Napoli, D. R., Nolan, P., Oziol, Ch., Podolyak, Zs., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Roberts, O. J., Rosso, D., Sahin, E., Salsac, M. -D., Scarlassara, F., Sferrazza, M., Simpson, J., Soderstrom, P. -A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Ur, C. A., Walshe, J., John, P. R., Modamio, V., Valiente-Dobon, J. J., Mengoni, D., Lunardi, S., Rodriguez, T. R., Bazzacco, D., Gadea, A., Wheldon, C., Alexander, T., de Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Bottoni, S., Bowry, M., Bracco, A., Browne, F., Bunce, M., Camera, F., Cederwall, B., Corradi, L., Crespi, F. C. L., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Goergen, A., Gottardo, A., Grebosz, J., Grente, L., Hess, H., Jungclaus, A., Kokalova, Tz., Korichi, A., Korten, W., Kusoglu, A., Lenzi, S., Leoni, S., Ljungvall, J., Maron, G., Meczynski, W., Melon, B., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Million, B., Molini, P., Montagnoli, G., Montanari, D., Napoli, D. R., Nolan, P., Oziol, Ch., Podolyak, Zs., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Roberts, O. J., Rosso, D., Sahin, E., Salsac, M. -D., Scarlassara, F., Sferrazza, M., Simpson, J., Soderstrom, P. -A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Ur, C. A., and Walshe, J.
Abstract: The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich Os-196 nucleus through in-beam gamma-ray spectroscopy using a two-proton transfer reaction from a Pt-198 target to a Se-82 beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident gamma rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of Os-196 were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even Os188-198 isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect gamma-unstable/triaxial rotor yrast band is predicted for Os-196 which is in agreement with the experimentally measured excited states.
Published: 2014

29. Isospin Character of Low-Lying Pygmy Dipole States in Pb-208 via Inelastic Scattering of O-17 Ions

Author: Crespi, F. C. L., Bracco, A., Nicolini, R., Mengoni, D., Pellegri, L., Lanza, E. G., Leoni, S., Maj, A., Kmiecik, M., Avigo, R., Benzoni, G., Blasi, N., Boiano, C., Bottoni, S., Brambilla, S., Camera, F., Ceruti, S., Giaz, A., Million, B., Morales, A. I., Vandone, V., Wieland, O., Bednarczyk, P., Ciemala, M., Grebosz, J., Krzysiek, M., Mazurek, K., Zieblinski, M., Bazzacco, D., Bellato, M., Birkenbach, B., Bortolato, D., Calore, E., Cederwall, B., Charles, L., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Gorgen, A., Gottardo, A., Isocrate, R., Jolie, J., Jungclaus, A., Karkour, N., Korten, W., Menegazzo, R., Michelagnoli, C., Molini, P., Napoli, D. R., Pullia, A., Recchia, F., Reiter, P., Rosso, D., Sahin, E., Salsac, M. D., Siebeck, B., Siem, S., Simpson, J., Soderstrom, P. -A., Stezowski, O., Theisen, Ch., Ur, C., Valiente-Dobon, J. J., Crespi, F. C. L., Bracco, A., Nicolini, R., Mengoni, D., Pellegri, L., Lanza, E. G., Leoni, S., Maj, A., Kmiecik, M., Avigo, R., Benzoni, G., Blasi, N., Boiano, C., Bottoni, S., Brambilla, S., Camera, F., Ceruti, S., Giaz, A., Million, B., Morales, A. I., Vandone, V., Wieland, O., Bednarczyk, P., Ciemala, M., Grebosz, J., Krzysiek, M., Mazurek, K., Zieblinski, M., Bazzacco, D., Bellato, M., Birkenbach, B., Bortolato, D., Calore, E., Cederwall, B., Charles, L., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Gadea, A., Gorgen, A., Gottardo, A., Isocrate, R., Jolie, J., Jungclaus, A., Karkour, N., Korten, W., Menegazzo, R., Michelagnoli, C., Molini, P., Napoli, D. R., Pullia, A., Recchia, F., Reiter, P., Rosso, D., Sahin, E., Salsac, M. D., Siebeck, B., Siem, S., Simpson, J., Soderstrom, P. -A., Stezowski, O., Theisen, Ch., Ur, C., and Valiente-Dobon, J. J.
Abstract: The properties of pygmy dipole states in Pb-208 were investigated using the Pb-208(O-17, O-17'gamma) reaction at 340 MeV and measuring the gamma decay with high resolution with the AGATA demonstrator array. Cross sections and angular distributions of the emitted gamma rays and of the scattered particles were measured. The results are compared with (gamma, gamma') and (p, p') data. The data analysis with the distorted wave Born approximation approach gives a good description of the elastic scattering and of the inelastic excitation of the 2(+) and 3(-) states. For the dipole transitions a form factor obtained by folding a microscopically calculated transition density was used for the first time. This has allowed us to extract the isoscalar component of the 1(-) excited states from 4 to 8 MeV.
Published: 2014

30. Isomeric decay spectroscopy of the Bi-217 isotope

Author: Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Lunardi, S., Gadea, A., Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Bazzacco, D., Benlliure, J., Boutachkov, P., Bowry, M., Bracco, A., Bruce, A. M., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gorska, M., Grebosz, J., Gregor, E., Habermann, T., Hoischen, R., Janik, R., John, P. R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Modamio, V., Morales, A. I., Napoli, D. R., Naqvi, F., Nicolini, R., Nociforo, C., Pfuetzner, M., Pietri, S., Podolyak, Zs., Prochazka, A., Prokopowicz, W., Recchia, F., Regan, P. H., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Weick, H., Wieland, O., Wollersheim, H-J., Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Lunardi, S., Gadea, A., Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Bazzacco, D., Benlliure, J., Boutachkov, P., Bowry, M., Bracco, A., Bruce, A. M., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gorska, M., Grebosz, J., Gregor, E., Habermann, T., Hoischen, R., Janik, R., John, P. R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Modamio, V., Morales, A. I., Napoli, D. R., Naqvi, F., Nicolini, R., Nociforo, C., Pfuetzner, M., Pietri, S., Podolyak, Zs., Prochazka, A., Prokopowicz, W., Recchia, F., Regan, P. H., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Weick, H., Wieland, O., and Wollersheim, H-J.
Abstract: The structure of the neutron-rich bismuth isotope Bi-217 has been studied for the first time. The fragmentation of a primary U-238 beam at the FRS-RISING setup at GSI was exploited to perform gamma-decay spectroscopy, since mu s isomeric states were expected in this nucleus. Gamma rays following the decay of a t(1/2) = 3 mu s isomer were observed, allowing one to establish the low-lying structure of Bi-217. The level energies and the reduced electric quadrupole transition probability B(E2) from the isomeric state are compared to large-scale shell-model calculations.
Published: 2014

31. New sub-mu s isomers in Sn-125,Sn-127,Sn-129 and isomer systematics of Sn124-130

Author: Lozeva, RL, Simpson, GS, Grawe, H, Neyens, G, Atanasova, LA, Balabanski, DL, Bazzacco, D, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Blazhev, A, Bracco, A, Brandau, C, Caceres, L, Camera, F, Chamoli, SK, Crespi, FCL, Daugas, J-M, Detistov, P, De Rydt, M, Doornenbal, P, Fahlander, C, Farnea, E, Georgiev, G, Gerl, J, Gladnishki, KA, Gorska, M, Grebosz, J, Hass, M, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Iordachescu, A, Jolie, J, Jungclaus, A, Kmiecik, M, Kojouharov, I, Kurz, N, Lakshmi, SP, Lo Bianco, G, Mallion, S, Maj, A, Montanari, D, Perru, O, Pfuetzner, M, Pietri, S, Pinston, JA, Podolyak, Zsolt, Prokopowicz, W, Rudolph, D, Rusev, G, Saitoh, TR, Saltarelli, A, Schaffner, H, Schwengner, R, Tashenov, S, Turzo, K, Valiente-Dobon, JJ, Vermeulen, N, Walker, J, Werner-Malento, E, Wieland, O, and Wollersheim, H-J
Published: 2008

32. Global properties of K hindrance probed by the gamma decay of the warm rotating W-174 nucleus

Author: Vandone, V., Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Boiano, C., Bottoni, S., Camera, F., Corsi, A., Crespi, F. C. L., Giaz, A., Million, B., Nicolini, R., Pellegri, L., Pullia, A., Wieland, O., Bortolato, D., de Angelis, G., Calore, E., Gottardo, A., Maron, G., Napoli, D. R., Rosso, D., Sahin, E., Valiente-Dobon, J. J., Bazzacco, D., Bellato, M., Farnea, E., Lunardi, S., Menegazzo, R., Mengoni, D., Molini, P., Michelagnoli, C., Montanari, D., Recchia, F., Ur, C. A., Gadea, A., Hueyuek, T., Cieplicka, N., Maj, A., Kmiecik, M., Atac, A., Akkoyun, S., Kaskas, A., Soederstroem, P. -A., Birkenbach, B., Cederwall, B., Coleman-Smith, P. J., Cullen, D. M., Desesquelles, P., Eberth, J., Goergen, A., Grebosz, J., Hess, H., Judson, D., Jungclaus, A., Karkour, N., Nolan, P., Obertelli, A., Reiter, P., Salsac, M. D., Stezowski, O., Theisen, Ch., Matsuo, M., Vigezzi, E., Vandone, V., Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Boiano, C., Bottoni, S., Camera, F., Corsi, A., Crespi, F. C. L., Giaz, A., Million, B., Nicolini, R., Pellegri, L., Pullia, A., Wieland, O., Bortolato, D., de Angelis, G., Calore, E., Gottardo, A., Maron, G., Napoli, D. R., Rosso, D., Sahin, E., Valiente-Dobon, J. J., Bazzacco, D., Bellato, M., Farnea, E., Lunardi, S., Menegazzo, R., Mengoni, D., Molini, P., Michelagnoli, C., Montanari, D., Recchia, F., Ur, C. A., Gadea, A., Hueyuek, T., Cieplicka, N., Maj, A., Kmiecik, M., Atac, A., Akkoyun, S., Kaskas, A., Soederstroem, P. -A., Birkenbach, B., Cederwall, B., Coleman-Smith, P. J., Cullen, D. M., Desesquelles, P., Eberth, J., Goergen, A., Grebosz, J., Hess, H., Judson, D., Jungclaus, A., Karkour, N., Nolan, P., Obertelli, A., Reiter, P., Salsac, M. D., Stezowski, O., Theisen, Ch., Matsuo, M., and Vigezzi, E.
Abstract: The K hindrance to the gamma decay is studied in the warm rotating W-174 nucleus, focusing on the weakening of the selection rules of the K quantum number with increasing excitation energy. W-174 was populated by the fusion reaction of Ti-50 (at 217 MeV) on a Te-128 target, and its gamma decay was detected by the AGATA Demonstrator array coupled to a BaF2 multiplicity filter at Laboratori Nazionali di Legnaro of INFN. A fluctuation analysis of gamma coincidence matrices gives a similar number of low-K and high-K discrete excited bands. The results are compared to simulations of the gamma-decay flow based on a microscopic cranked shell model at finite temperature in which the K mixing is governed by the interplay of Coriolis force with the residual interaction. Agreement between simulations and experiment is obtained only by hindering the E1 decay between low-K and high-K bands by an amount compatible with that determined by spectroscopic studies of K isomers in the same mass region, with a similar trend with excitation energy. The work indicates that K mixing due to temperature effects may play a leading role for the entire body of discrete excited bands, which probes the onset region of K weakening.
Published: 2013

33. Lifetime measurements in neutron-rich Co-63,Co-65 isotopes using the AGATA demonstrator

Author: Modamio, V., Valiente-Dobon, J. J., Lunardi, S., Lenzi, S. M., Gadea, A., Mengoni, D., Bazzacco, D., Algora, A., Bednarczyk, P., Benzoni, G., Birkenbach, B., Bracco, A., Bruyneel, B., Burger, A., Chavas, J., Corradi, L., Crespi, F. C. L., de Angelis, G., Desesquelles, P., de France, G., Depalo, R., Dewald, A., Doncel, M., Erduran, M. N., Farnea, E., Fioretto, E., Fransen, Ch., Geibel, K., Gottardo, A., Gorgen, A., Habermann, T., Hackstein, M., Hess, H., Hueyuek, T., John, P. R., Jolie, J., Judson, D., Jungclaus, A., Karkour, N., Kempley, R., Leoni, S., Melon, B., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Million, B., Moeller, O., Montagnoli, G., Montanari, D., Nannini, A., Napoli, D. R., Podolyak, Zs., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Rother, W., Sahin, E., Salsac, M. D., Scarlassara, F., Sieja, K., Soderstrom, P. A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Travers, B., Ur, C. A., Modamio, V., Valiente-Dobon, J. J., Lunardi, S., Lenzi, S. M., Gadea, A., Mengoni, D., Bazzacco, D., Algora, A., Bednarczyk, P., Benzoni, G., Birkenbach, B., Bracco, A., Bruyneel, B., Burger, A., Chavas, J., Corradi, L., Crespi, F. C. L., de Angelis, G., Desesquelles, P., de France, G., Depalo, R., Dewald, A., Doncel, M., Erduran, M. N., Farnea, E., Fioretto, E., Fransen, Ch., Geibel, K., Gottardo, A., Gorgen, A., Habermann, T., Hackstein, M., Hess, H., Hueyuek, T., John, P. R., Jolie, J., Judson, D., Jungclaus, A., Karkour, N., Kempley, R., Leoni, S., Melon, B., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Million, B., Moeller, O., Montagnoli, G., Montanari, D., Nannini, A., Napoli, D. R., Podolyak, Zs., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Rother, W., Sahin, E., Salsac, M. D., Scarlassara, F., Sieja, K., Soderstrom, P. A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Travers, B., and Ur, C. A.
Abstract: Lifetimes of the low-lying (11/2(-)) states in Co-63,Co-65 have been measured employing the recoil distance doppler shift method (RDDS) with the AGATA gamma-ray array and the PRISMA mass spectrometer. These nuclei were populated via a multinucleon transfer reaction by bombarding a U-238 target with a beam of Ni-64. The experimental B(E2) reduced transition probabilities for Co-63,Co-65 are well reproduced by large-scale shell-model calculations that predict a constant trend of the B(E2) values up to the N = 40 Co-67 isotope.
Published: 2013

34. Lifetimes and electromagnetic transition strengths in Dy-155

Author: Petkov, P., Yavahchova, M. S., Moeller, O., Dewald, A., Tonev, D., Saha, B., Fitzler, A., Jessen, K., Klug, T., Heinze, S., Jolie, J., von Brentano, P., Goutev, N., Bazzacco, D., Ur, C. A., Farnea, E., Axiotis, M., Lunardi, S., de Angelis, G., Napoli, D. R., Marginean, N., Martinez, T., Caprio, M. A., Petkov, P., Yavahchova, M. S., Moeller, O., Dewald, A., Tonev, D., Saha, B., Fitzler, A., Jessen, K., Klug, T., Heinze, S., Jolie, J., von Brentano, P., Goutev, N., Bazzacco, D., Ur, C. A., Farnea, E., Axiotis, M., Lunardi, S., de Angelis, G., Napoli, D. R., Marginean, N., Martinez, T., and Caprio, M. A.
Abstract: Recoil distance Doppler-shift and Doppler-shift attenuation lifetime measurements were carried out for levels in Dy-155 through the coincident detection of. rays. Twenty-six lifetimes, most of them for the first time, were determined using the differential decay curve method for the analysis of the data. At low and medium spins, particle-plus-triaxial-rotor calculations reveal different quadrupole deformations for the one-quasineutron bands in this transitional nucleus. At high spin, the reduced B(E2) transition probabilities confirm with a better precision the results of a previous study implying decreased collectivity with increasing spin.
Published: 2013

35. New Isomers in the Full Seniority Scheme of Neutron-Rich Lead Isotopes: The Role of Effective Three-Body Forces

Author: Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Nicolini, R., Gadea, A., Lunardi, S., Boutachkov, P., Bruce, A. M., Gorska, M., Grebosz, J., Pietri, S., Podolyak, Zs., Pfuetzner, M., Regan, P. H., Weick, H., Alcantara Nunez, J., Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bracco, A., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Dombradi, Zs., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, R., Janik, R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D. R., Naqvi, F., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, F., Ribas, R. V., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Wieland, O., Wollersheim, H-J., Nowacki, F., Maglione, E., Zuker, A. P., Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Nicolini, R., Gadea, A., Lunardi, S., Boutachkov, P., Bruce, A. M., Gorska, M., Grebosz, J., Pietri, S., Podolyak, Zs., Pfuetzner, M., Regan, P. H., Weick, H., Alcantara Nunez, J., Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bracco, A., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Dombradi, Zs., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, R., Janik, R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D. R., Naqvi, F., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, F., Ribas, R. V., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Wieland, O., Wollersheim, H-J., Nowacki, F., Maglione, E., and Zuker, A. P.
Abstract: The neutron-rich lead isotopes, up to Pb-216, have been studied for the first time, exploiting the fragmentation of a primary uranium beam at the FRS-RISING setup at GSI. The observed isomeric states exhibit electromagnetic transition strengths which deviate from state-of-the-art shell-model calculations. It is shown that their complete description demands the introduction of effective three-body interactions and two-body transition operators in the conventional neutron valence space beyond Pb-208.
Published: 2012

36. Stabilization of prolate deformation at high spin in Kr-75

Author: Steinhardt, T., Eberth, J., Skoda, S., Thelen, O., Schwengner, R., Doenau, F., Plettner, C., Schnare, H., de Angelis, G., Napoli, D. R., Farnea, E., Gadea, A., Jungclaus, A., Lieb, K. P., Wadsworth, R., Steinhardt, T., Eberth, J., Skoda, S., Thelen, O., Schwengner, R., Doenau, F., Plettner, C., Schnare, H., de Angelis, G., Napoli, D. R., Farnea, E., Gadea, A., Jungclaus, A., Lieb, K. P., and Wadsworth, R.
Abstract: The neutron-deficient nucleus Kr-75 has been studied in two EUROBALL experiments. The analysis yielded a considerably extended level scheme including two newly observed excited high spin bands. The results are interpreted in the framework of the cranked Nilsson-Strutinsky approach. The calculations compare well to the experimentally established level scheme and predict the nucleus to be mainly prolate or triaxially deformed at high spin. Evidence for an oblate-prolate shape coexistence could not be found at high spin. DOI: 10.1103/PhysRevC.86.064310
Published: 2012

37. Spectroscopy of neutron-rich Dy-168,Dy-170: Yrast band evolution close to the NpNn valence maximum

Author: Soderstrom, P-A, Nyberg, J, Regan, PH, Algora, A, de Angelis, G, Ashley, SF, Aydin, S, Bazzacco, D, Casperson, RJ, Catford, WN, Cederkall, J, Chapman, R, Corradi, L, Fahlander, C, Farnea, E, Fioretto, E, Freeman, SJ, Gadea, A, Gelletly, W, Gottardo, A, Grodner, E, He, CY, Jones, GA, Keyes, K, Labiche, M, Liang, X, Liu, Z, Lunardi, S, Marginean, N, Mason, P, Menegazzo, R, Mengoni, D, Montagnoli, G, Napoli, D, Ollier, J, Pietri, S, Podolyak, Z, Pollarolo, G, Recchia, F, Sahin, E, Scarlassara, F, Silvestri, R, Smith, JF, Spohr, K-M, Steer, SJ, Stefanini, AM, Szilner, S, Thompson, NJ, Tveten, GM, Ur, CA, Valiente-Dobon, JJ, Werner, V, Williams, SJ, Xu, FR, Zhu, JY, Soderstrom, P-A, Nyberg, J, Regan, PH, Algora, A, de Angelis, G, Ashley, SF, Aydin, S, Bazzacco, D, Casperson, RJ, Catford, WN, Cederkall, J, Chapman, R, Corradi, L, Fahlander, C, Farnea, E, Fioretto, E, Freeman, SJ, Gadea, A, Gelletly, W, Gottardo, A, Grodner, E, He, CY, Jones, GA, Keyes, K, Labiche, M, Liang, X, Liu, Z, Lunardi, S, Marginean, N, Mason, P, Menegazzo, R, Mengoni, D, Montagnoli, G, Napoli, D, Ollier, J, Pietri, S, Podolyak, Z, Pollarolo, G, Recchia, F, Sahin, E, Scarlassara, F, Silvestri, R, Smith, JF, Spohr, K-M, Steer, SJ, Stefanini, AM, Szilner, S, Thompson, NJ, Tveten, GM, Ur, CA, Valiente-Dobon, JJ, Werner, V, Williams, SJ, Xu, FR, and Zhu, JY
Published: 2010

38. Transition probabilities in the X(5) candidate Ba-122

Author: Bizzeti, P. G., Bizzeti-Sona, A. M., Tonev, D., Giannatiempo, A., Ur, C. A., Dewald, A., Melon, B., Michelagnoli, C., Petkov, P., Bazzacco, D., Costin, A., de Angelis, G., Della Vedova, F., Fantuzi, M., Farnea, E., Fransen, C., Gadea, A., Lenzi, S., Lunardi, S., Marginean, N., Marginean, R., Menegazzo, R., Mengoni, D., Moeller, O., Nannini, A., Napoli, D. R., Nespolo, M., Pavan, P., Perego, A., Petrache, C. M., Pietralla, N., Alvarez, C. Rossi, Sona, P., Bizzeti, P. G., Bizzeti-Sona, A. M., Tonev, D., Giannatiempo, A., Ur, C. A., Dewald, A., Melon, B., Michelagnoli, C., Petkov, P., Bazzacco, D., Costin, A., de Angelis, G., Della Vedova, F., Fantuzi, M., Farnea, E., Fransen, C., Gadea, A., Lenzi, S., Lunardi, S., Marginean, N., Marginean, R., Menegazzo, R., Mengoni, D., Moeller, O., Nannini, A., Napoli, D. R., Nespolo, M., Pavan, P., Perego, A., Petrache, C. M., Pietralla, N., Alvarez, C. Rossi, and Sona, P.
Abstract: To investigate the possible X(5) character of Ba-122, suggested by the ground-state band energy pattern, the lifetimes of the lowest yrast states of Ba-122 have been measured, via the recoil distance Doppler-shift method. The relevant levels have been populated by using the Cd-108(O-16,2n)Ba-122 and the Sn-112(C-13, 3n)Ba-122 reactions. The B(E2) values deduced in the present work are compared to the predictions of the X(5) model and to calculations performed in the framework of the IBA-1 and IBA-2 models.
Published: 2010

39. gamma-ray spectroscopy of the neutron-rich nuclei (89)Rb, (92)Y, and (93)Y with multinucleon transfer reactions

Author: Bucurescu, D, Rusu, C, Marginean, N, Ur, CA, de Angelis, G, Corradi, L, Bazzacco, D, Beghini, S, Della Vedova, F, Duchene, G, Farnea, E, Faul, T, Fioretto, E, Gadea, A, Gelletly, W, Guiot, B, Ionescu-Bujor, M, Iordachescu, A, Landown, SD, Lenzi, SM, Lunardi, S, Mason, P, Mihai, C, Marginean, R, Menegazzo, R, Montagnoli, G, Napoli, D, Podolyak, Z, Regan, PH, Scarlassara, F, Stefanini, AM, Suliman, G, Szilner, S, Trotta, M, Valiente-Dobon, JJ, Zhang, YH, Bucurescu, D, Rusu, C, Marginean, N, Ur, CA, de Angelis, G, Corradi, L, Bazzacco, D, Beghini, S, Della Vedova, F, Duchene, G, Farnea, E, Faul, T, Fioretto, E, Gadea, A, Gelletly, W, Guiot, B, Ionescu-Bujor, M, Iordachescu, A, Landown, SD, Lenzi, SM, Lunardi, S, Mason, P, Mihai, C, Marginean, R, Menegazzo, R, Montagnoli, G, Napoli, D, Podolyak, Z, Regan, PH, Scarlassara, F, Stefanini, AM, Suliman, G, Szilner, S, Trotta, M, Valiente-Dobon, JJ, and Zhang, YH
Published: 2007

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