6 results on '"Kulp, W.D."'
Search Results
2. First candidates for $\gamma$ vibrational bands built on the $[505]11/{2}^{-}$ neutron orbital in odd-$A$ Dy isotopes
- Author
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MAJOLA, S.N.T., SITHOLE, M.A., MDLETSHE, L., HARTLEY, D., TIMÁR, J., NYAKÓ, B.M., ALLMOND, J.M., BARK, R.A., BEAUSANG, C., BIANCO, L., BUCHER, T.D., BVUMBI, S.P., CARPENTER, M.P., CHIARA, C.J., COOPER, N., CULLEN, D.M., CURIEN, D., DINOKO, T.S., GALL, B.J.P., GARRETT, P.E., GREENLEES, P.T., HIRVONEN, J., JAKOBSSON, U., JONES, P.M., JULIN, R., JUUTINEN, S., KETELHUT, S., KHESWA, B.V., KONDEV, F.G., KORICHI, A., KULP, W.D., LAURITSEN, T., LAWRIE, E.A., MAKHATHINI, L., MASITENG, P.L., MAQABUKA, B., MCCUTCHAN, E.A., MILLER, D., MILLER, S., MINKOVA, A., MSEBI, L., MTHEMBU, S.H., NDAYISHIMYE, J., NIEMINEN, P., NGCOBO, P.Z., NTSHANGASE, S.S., ORCE, J.N., PEURA, P., RAHKILA, P., REDON, N., RIEDINGER, L.L., RILEY, M.A., ROUX, D.G., RUOTSALAINEN, P., PIOT, J., SAREN, J., SHARPEY-SCHAFER, J.F., SCHOLEY, C., SHIRINDA, O., SIMPSON, J., SORRI, J., STEFANESCU, I., STOLZE, S., UUSITALO, J., WANG, X., WERNER, V., WOOD, J.L., YU, C.H., ZHU, S., ZIMBA, G., Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire 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), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Nuclear Theory ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Structure ,Nuclear Experiment - Abstract
Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the 155Gd({\alpha},2n)157Dy and 148Nd(12C, 5n)155Dy reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a K{\pi}= 2+ {\gamma} vibrational band, built on the [505]11/2- neutron orbital, in both odd-A 155, 157Dy isotopes. The coupling of the first excited K=0+ states or the so-called \b{eta} vibrational bands at 661 and 676 keV in 154Dy and 156Dy to the [505]11/2- orbital, to produce a K{\pi}=11/2- band, was not observed in both 155Dy and 157Dy, respectively. The implication of these findings on the interpretation of the first excited 0+ states in the core nuclei 154Dy and 156Dy are also discussed., Comment: Published in Physical Rev C
- Published
- 2020
3. Multiple Shape Coexistence in 110,112Cd and Beyond Mean Field Calculations
- Author
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Garrett, P.E., primary, Rodríguez, T.R., additional, Varela, A. Diaz, additional, Green, K.L., additional, Bangay, J., additional, Finlay, A., additional, Austin, R.A.E., additional, Ball, G.C., additional, Bandyopadhyay, D.S., additional, Bildstein, V., additional, Colosimo, S., additional, Cross, D.S., additional, Demand, G.A., additional, Finlay, P., additional, Garnsworthy, A.B., additional, Grinyer, G.F., additional, Hackman, G., additional, Jigmeddorj, B., additional, Jolie, J., additional, Kulp, W.D., additional, Leach, K.G., additional, Morten, A.C., additional, Orce, J.N., additional, Person, C.J., additional, Phillips, A.A., additional, Radich, A.J., additional, Rand, E.T., additional, Schumaker, M.A., additional, Svensson, C.E., additional, Sumithrarachchi, C., additional, Triambak, S., additional, Warr, N., additional, Wong, J., additional, Wood, J.L., additional, and Yates, S.W., additional
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- 2020
- Full Text
- View/download PDF
4. Investigation of negative-parity states in Dy 156: Search for evidence of tetrahedral symmetry
- Author
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Miller, S., Dudek, J., Wang, X., Piot, J., Lauritsen, T., Carpenter, M.P., Werner, V., Majola, S.N.T., Gall, B.J.P., Chiara, C.J., Redon, N., Hartley, D.J., Kondev, F.G., Miller, D., Kulp, W.D., Wood, J.L., Zhu, S., Sharpey-Schafer, J.F., Stefanescu, I., McCutchan, E.A., Cooper, N., Janssens, R.V.F., Yu, C.-H., Simpson, J., Allmond, J.M., Curien, D., Garrett, P.E., Riley, M.A., Beausang, C.W., and Riedinger, L.L.
- Abstract
An experiment populating low/medium-spin states in Dy156 was performed to investigate the possibility of tetrahedral symmetry in this nucleus. In particular, focus was placed on the low-spin, negative-parity states since recent theoretical studies suggest that these may be good candidates for this high-rank symmetry. The states were produced in the Nd148(C12,4n) reaction and the Gammasphere array was utilized to detect the emitted γ rays. B(E2)/B(E1) ratios of transition probabilities from the low-spin, negative-parity bands were determined and used to interpret whether these structures are best associated with tetrahedral symmetry or, as previously assigned, to octupole vibrations. In addition, several other negative-parity structures were observed to higher spin and two new sequences were established.
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- 2017
- Full Text
- View/download PDF
5. Observation of γ vibrations and alignments built on non-ground-state configurations in Dy156
- Author
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Majola, S.N.T., Hartley, D.J., Riedinger, L.L., Sharpey-Schafer, J.F., Allmond, J.M., Beausang, C., Carpenter, M.P., Chiara, C.J., Cooper, N., Curien, D., Gall, B.J.P., Garrett, P.E., Janssens, R.V.F., Kondev, F.G., Kulp, W.D., Lauritsen, T., Mccutchan, E.A., Miller, D., Piot, J., Redon, N., Riley, M.A., Simpson, J., Stefanescu, I., Werner, V., Wang, X., Wood, J.L., Yu, C.-H., Zhu, S., Département Recherches Subatomiques (DRS-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-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)
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Nuclear Theory ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment - Abstract
International audience; The exact nature of the lowest Kπ=2+ rotational bands in all deformed nuclei remains obscure. Traditionally they are assumed to be collective vibrations of the nuclear shape in the γ degree of freedom perpendicular to the nuclear symmetry axis. Very few such γ bands have been traced past the usual backbending rotational alignments of high-j nucleons. We have investigated the structure of positive-parity bands in the N=90 nucleus Dy156, using the Nd148(C12,4n)Dy156 reaction at 65 MeV, observing the resulting γ-ray transitions with the Gammasphere array. The even- and odd-spin members of the Kπ=2+γ band are observed up to 32+ and 31+, respectively. This rotational band faithfully tracks the ground-state configuration to the highest spins. The members of a possible γ vibration built on the aligned yrast S band are observed up to spins 28+ and 27+. An even-spin positive-parity band, observed up to spin 24+, is a candidate for an aligned S band built on the seniority-zero configuration of the 0+2 state at 676 keV. The crossing of this band with the 0+2 band is at ℏωc=0.28(1)MeV and is consistent with the configuration of the 0+2 band not producing any blocking of the monopole pairing.
- Published
- 2015
6. Observation of γ vibrations and alignments built on non-ground-state configurations in Dy 156
- Author
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Cooper, N., Garrett, P.E., Riley, M.A., Piot, J., Beausang, C., Miller, D., Werner, V., Majola, S.N.T., Kulp, W.D., Yu, C.-H., Kondev, F.G., Chiara, C.J., Riedinger, L.L., Hartley, D.J., Zhu, S., Curien, D., Stefanescu, I., Allmond, J.M., Gall, B.J.P., Janssens, R.V.F., Sharpey-Schafer, J.F., Wang, X., Wood, J.L., Carpenter, M.P., Redon, N., Simpson, J., Lauritsen, T., and McCutchan, E.A.
- Abstract
The exact nature of the lowest Kπ=2+ rotational bands in all deformed nuclei remains obscure. Traditionally they are assumed to be collective vibrations of the nuclear shape in the γ degree of freedom perpendicular to the nuclear symmetry axis. Very few such γ bands have been traced past the usual backbending rotational alignments of high-j nucleons. We have investigated the structure of positive-parity bands in the N=90 nucleus Dy156, using the Nd148(C12,4n)Dy156 reaction at 65 MeV, observing the resulting γ-ray transitions with the Gammasphere array. The even- and odd-spin members of the Kπ=2+γ band are observed up to 32+ and 31+, respectively. This rotational band faithfully tracks the ground-state configuration to the highest spins. The members of a possible γ vibration built on the aligned yrast S band are observed up to spins 28+ and 27+. An even-spin positive-parity band, observed up to spin 24+, is a candidate for an aligned S band built on the seniority-zero configuration of the 02+ state at 676 keV. The crossing of this band with the 02+ band is at ?ωc=0.28(1)MeV and is consistent with the configuration of the 02+ band not producing any blocking of the monopole pairing.
- Published
- 2015
- Full Text
- View/download PDF
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