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Your search keyword '"Yoshinaga N"' showing total 7 results
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7 results on '"Yoshinaga N"'

1. Isomer spectroscopy in $^{133}$Ba and high-spin structure of $^{134}$Ba

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., Görgen, A., Gottardo, A., Hadyńska-Klęk, 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., Mijatović, T., Montagnoli, G., Montanari, D., Müller-Gatermann, C., Napoli, D., Podolyák, Zs., Pollarolo, G., Recchia, F., Régis, J.M., Saed-Samii, N., Şahin, E., Scarlassara, F., Schomacker, K., Seidlitz, M., Siebeck, B., Söderström, P.A., Stefanini, A.M., Stezowski, O., Szilner, S., Szpak, B., Teruya, E., Ur, C., Valiente-Dobón, J.J., Wolf, K., Yanase, K., Yoshinaga, N., Zell, K.O., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Laue-Langevin (ILL), ILL, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure, multinucleon transfer reactions, structure of Ba isotopes
Abstract

International audience; The transitional nuclei $^{134}$Ba and $^{133}$Ba 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 Jπ=19/2+ state at 1942 keV in $^{133}$Ba is identified as an isomer with a half-life of 66.6(20)ns corresponding to a B(E1) value of 7.7(4)×10−6e2fm2 for the Jπ=19/2+ to Jπ=19/2− transition. The level scheme of $^{134}$Ba above the Jπ=10+ isomer is extended to approximately 6 MeV. A pronounced backbending is observed at ℏω=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 $^{134}$Ba.

Published
2019
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2. High-spin structures in Xe-132 and Xe-133 and evidence for isomers along the N=79 isotones

Author

Vogt, A.: Siciliano, 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, Tea, Montagnoli, G., Montanari, D., Muller-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, Suzana, Szpak, B., Teng, R., Ur, C., Warner, D. D., Wolf, K., Wu, C. Y., and Zell, K. O.

Subjects
Physics, nuclear structure, high-spin isomers
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

3. Yrast studies of 80,82 Se using deep-inelastic reactions

Author

Jones, G. A., Regan, P. H., Podolyák, Zs., Yoshinaga, N., Higashiyama, K., de Angelis, G., Zhang, Y. H., Gadea, A., Ur, C. A., Axiotis, M., Bazzacco, D., Bucurescu, D., Farnea, E., Gelletly, W., Ionescu-Bujor, M., Iordachescu, A., Kröll, Th., Langdown, S. D., Lenzi, S., Lunardi, S., Marginean, N., Martinez, T., Medina, N. H., Menegazzo, R., Napoli, D. R., Quintana, B., Rubio, B., Rusu, C., Schwengner, R., Tonev, D., Valiente Dobón, J. J., and von Oertzen, W.

Subjects
gamma-ray spectroscopy, deep-inelastic reactions, shell model, nuclear Structure
Abstract

We report the results of an experiment in which we studied the near-yrast states in selenium isotopes approaching N = 50 following their population in multinucleon transfer reactions between a 82Se beam and a 192Os target. The level schemes for 80,82Se derived from the current work are compared with restricted-basis shell-model calculations and pair-truncated shell-model calculations. These provide a good description of the yrast sequences in these nuclei using a basis space limited to excitations in the (p3/2 , p1/2 , g9/2 ) and (f5/2 , p3/2 , p1/2 ) orbitals.

Published
2007

4. Shell model study of neutron rich Se and Ge isotopes.

Author

Yoshinaga, N., Higashiyama, K., and Regan, P. H.

Subjects
*NUCLEAR structure, *NUCLEAR physics, *ISOTOPES, *NUCLEAR shell theory, *QUADRUPOLE moments, *PAIRING correlations (Nuclear physics)
Abstract

Nuclear structure of the neutron-rich Se, and Ge isotopes is theoretically studied in terms of the spherical full shell model with the monopole and quadrupole pairing plus quadrupole-quadrupole interaction. The experimental energy levels of low-lying states as well as high-spin states are well reproduced. The shell model results are examined in details in a pair-truncated shell model. The analysis shows the alignment of two g9/2 neutrons at high spins. [ABSTRACT FROM AUTHOR]

Published
2009
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6. A simple model for doublet bands in doubly odd nuclei.

Author

Yoshinaga, N. and Higashiyama, K.

Subjects
*NUCLEAR structure, *QUADRUPOLE moments, *SPIN-spin interactions, *NEUTRONS, *VALENCE (Chemistry), *HEAVY nuclei
Abstract

Nuclear structure of doublet bands in doubly odd nuclei with mass A ∼ 130 is investigated within the framework of a simple model where the even-even core couples with a neutron and a proton in intruder orbitals through a quadrupole-quadrupole interaction. The model reproduces quite well the energy levels of doublet bands and electromagnetic transitions. The staggering of the ratios B( M1; I → I - 1)/ B( E2; I → I - 2) of the yrast bands turns out to be described by the chopsticks-like motion of two angular momenta of the unpaired neutron and the unpaired proton when they are weakly coupled with the core.-1 [ABSTRACT FROM AUTHOR]

Published
2006
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