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28 results on '"shell model calculations"'

1. Shell model calculations for deformed Li isotopes

Author

A. K. Azhibekov, V. V. Samarin, K. A. Kuterbekov, and M. A. Naumenko

Subjects
shell model calculations, deformed and spherical nuclei, li isotopes, Physics, QC1-999
Abstract

The nuclear shell model and its application to studying the structure of nuclei with deformed and spherical shapes are discussed. Calculations of level energies and wave functions in the shell model of deformed and spherical nuclei are performed for7,8,11Li nuclei. A detailed calculation scheme for solving theradial Schrödinger equation is presented.

Published
2021
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2. Proof for strong ascendancy of short range effects on inelastic form factors in some open fp-shell nuclei.

Author

Fadhil, Sanna N., Abdalsattar, Sarrah I., and Al-Rahmani, Altaf A.

Subjects
*VALENCE fluctuations, *MOMENTUM transfer, *DENSITY matrices, *CLUSTERING of particles, *SPACE charge, *NUCLEON-nucleon interactions
Abstract

Short range effects on inelastic C2 form factors in some open fp nuclei ( 4 6 − 5 0 Ti, 5 0 − 5 4 Cr, 5 4 − 5 6 Fe and 6 4 − 6 8 Zn) have been researched. The charge densities in these isotopes have been also researched by the one and two particle components of cluster series using single-particle wavefunctions of the harmonic oscillator potential. The short range effects have been inserted into the two particle components of cluster series employing the Jastrow form correlation. The total form factors of isotopes under consideration arise from the model space and core-polarization participations. The one-body density matrix elements (which are needed for computing the model space transition charge density) of valence nucleons for the transition 0 + → 2 + have been computed by accomplishment of shell model calculations using the OXBASH code with various interactions. The shape of Tassie model has been adopted for computing the core-polarization transition charge density. The present computations are reliant on b (oscillator parameter) and β (correlation parameter), where these parameters have been created independently for each individual nucleus by fitting the computed elastic form factors to those of experimental ones. This study provides a proof for strong ascendancy of short range effects on the present calculations, where inclusion of short range correlations on computations seems to be required for performing a notable modification in the computed outcomes which sequentially causes to elucidate the experimental data astoundingly in the momentum transfer under consideration. [ABSTRACT FROM AUTHOR]

Published
2022
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4. Observation of a γ-decaying millisecond isomeric state in 128Cd80

Author

A. Jungclaus, H. Grawe, S. Nishimura, P. Doornenbal, G. Lorusso, G.S. Simpson, P.-A. Söderström, T. Sumikama, J. Taprogge, Z.Y. Xu, H. Baba, F. Browne, N. Fukuda, R. Gernhäuser, G. Gey, N. Inabe, T. Isobe, H.S. Jung, D. Kameda, G.D. Kim, Y.-K. Kim, I. Kojouharov, T. Kubo, N. Kurz, Y.K. Kwon, Z. Li, H. Sakurai, H. Schaffner, Y. Shimizu, K. Steiger, H. Suzuki, H. Takeda, Zs. Vajta, H. Watanabe, J. Wu, A. Yagi, K. Yoshinaga, G. Benzoni, S. Bönig, K.Y. Chae, L. Coraggio, J.-M. Daugas, F. Drouet, A. Gadea, A. Gargano, S. Ilieva, N. Itaco, F.G. Kondev, T. Kröll, G.J. Lane, A. Montaner-Pizá, K. Moschner, D. Mücher, F. Naqvi, M. Niikura, H. Nishibata, A. Odahara, R. Orlandi, Z. Patel, Zs. Podolyák, and A. Wendt

Subjects
Isomeric decays, Shell model calculations, Transition strengths, Physics, QC1-999
Abstract

A new high-spin isomer in the neutron-rich nucleus 128Cd was populated in the projectile fission of a 238U beam at the Radioactive Isotope Beam Factory at RIKEN. A half-life of T1/2=6.3(8) ms was measured for the new state which was tentatively assigned a spin/parity of (15−). The experimental results are compared to shell model calculations performed using state-of-the-art realistic effective interactions and to the neighbouring nucleus 129Cd. In the present experiment no evidence was found for the decay of a 18+ E6 spin-trap isomer, based on the complete alignment of the two-neutron and two-proton holes in the 0h11/2 and the 0g9/2 orbit, respectively, which is predicted to exist by the shell model.

Published
2017
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6. New levels in spherical 96Y.

Author

Wang, E. H., Hamilton, J. H., Ramayya, A. V., Han, R., Zachary, C. J., Eldridge, J. M., Hwang, J. K., Brewer, N. T., Luo, Y. X., Rasmussen, J. O., Zhu, S. J., Ter-Akopian, G. M., and Oganessian, Yu. Ts.

Subjects
*SPHERICAL astronomy, *NEUTRONS, *NUCLEAR reactors, *DEFORMATIONS (Mechanics), *PHYSICS experiments, *NILSSON model
Abstract

New transitions in neutron rich 96Y have been identified by analyzing the high statistics γ-γ-γ and γ-γ-γ-γ coincidence data from the spontaneous fission of 252Cf at the Gammasphere detector array. Shell model calculations were performed and are found in good agreement with experimental data. The ground state is nearly spherical but a new excited band has large deformation. [ABSTRACT FROM AUTHOR]

Published
2018
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8. Shell model calculations for deformed Li isotopes

Author

K.A. Kuterbekov, A.K. Azhibekov, M.A. Naumenko, and V.V. Samarin

Subjects
Physics, Nuclear and High Energy Physics, Radiation, Physics and Astronomy (miscellaneous), Isotope, Materials Science (miscellaneous), SHELL model, Nuclear Theory, deformed and spherical nuclei, Condensed Matter Physics, Molecular physics, lcsh:QC1-999, shell model calculations, Nuclear Experiment, lcsh:Physics, li isotopes
Abstract

The nuclear shell model and its application to studying the structure of nuclei with deformed and spherical shapes are discussed. Calculations of level energies and wave functions in the shell model of deformed and spherical nuclei are performed for 7,8,11Li nuclei. A detailed calculation scheme for solving the radial Schrodinger equation is presented.

Published
2019

9. 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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10. Multinucleon Transfer Reactions to Study Single-Particle Evolution in Se Isotopes.

Author

Regan, P. H., Jones, G. A., Podolyák, Zs., Yoshinaga, N., Higashiyama., K., deAngelis, G., Zhang, Y. H., Gadea, A., Ur, C. A., Axiotis, M., Bazzacco, D., Broda, R., Bucurescu, D., Farnea, E., Gelletly, W., Ionescu-Bujor, M., Iordachescu, A., Kröll, Th., Langdown, S. D., and Lenzi, S.

Subjects
*SELENIUM, *ISOTOPES, *PARTICLES (Nuclear physics), *RADIOACTIVE decay, SELENIUM isotopes
Abstract

This contribution reports on the results of an experiment to study the near-yrast states in selenium isotopes around N=50, following their population in thick-target, multinucleon transfer reactions between an 82Se beam and a 192Os target. Discrete decays from states with spins of 20h and higher are clearly identified in the Os-like fragments. Information on the size of the energy gap between the f5/2 and p3/2 proton orbitals can be inferred from the spectroscopy of the N=48 isotone, 82Se. The experiment results for the level schemes for 80,82Se derived in the current work are compared with restricted-basis shell model calculations, which give a good description of the yrast sequences of these nuclei using a basis space limited to excitations in the (p3/2 , p1/2 , g9/2 ) neutron and (f5/2 , p3/2 , p1/2 ) proton orbitals. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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11. Identification of a millisecond isomeric state in [formula omitted] via the detection of internal conversion and Compton electrons.

Author

Taprogge, J., Jungclaus, A., Grawe, H., Nishimura, S., Xu, Z.Y., Doornenbal, P., Lorusso, G., Nácher, E., Simpson, G.S., Söderström, P.-A., Sumikama, T., Baba, H., Browne, F., Fukuda, N., Gernhäuser, R., Gey, G., Inabe, N., Isobe, T., Jung, H.S., and Kameda, D.

Subjects
*METASTABLE states, *NUCLEAR counters, *INTERNAL conversion (Nuclear physics), *COMPTON electrons, *RADIOACTIVE decay
Abstract

The decay of an isomeric state in the neutron-rich nucleus 129 Cd has been observed via the detection of internal conversion and Compton electrons providing first experimental information on excited states in this nucleus. The isomer was populated in the projectile fission of a 238 U beam at the Radioactive Isotope Beam Factory at RIKEN. From the measured yields of γ -rays and internal conversion electrons, a multipolarity of E 3 was tentatively assigned to the isomeric transition. A half-life of T 1 / 2 = 3.6 ( 2 ) ms was determined for the new state which was assigned a spin of ( 21 / 2 + ) , based on a comparison to shell model calculations performed using state-of-the-art realistic effective interactions. [ABSTRACT FROM AUTHOR]

Published
2014
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12. Single-particle and collective excitations in the N=28 isotones 54Fe and 53Mn

Author

Rudolph, D., Ragnarsson, I., Andreoiu, C., Bentley, M. A., Carpenter, M.P., Charity, R. J., Clark, R. M., Ekman, J., Fahlander, C., Fallon, P., Reviol, W., Sarantites, D. G., and Seweryniak, D.

Subjects
Rotational bands, Nuclear Theory, Subatomic Physics, Shell model calculations, Nuclear structure, Gamma-ray spectroscopy, Nuclear Experiment
Abstract

The fusion-evaporation reaction 32S + 28Si at 125 MeV beam energy was used to populate high-spin states in the semimagic N = 28 nuclei 53Mn and 54Fe. With a combination of the Gammasphere spectrometer and ancillary devices including the Microball CsI(Tl) array, extensive high-spin level schemes are derived. They exhibit rotational-like collective structures and competing single-particle excitations. The experimental results are compared with predictions from shell-model calculations, for which the inclusion of isopin-symmetry-breaking terms is found to improve the description. An interpretation of the high-spin states is put forward using cranked Nilsson-Strutinsky calculations, indicative of contributions from collective excitations beyond some 8-MeV excitation energy and highlighting the importance of the g9/2 intruder orbital in this energy range.

Published
2020

13. SHELL MODEL DESCRIPTION OF 102-108Sn ISOTOPES.

Author

TRIVEDI, T., SRIVASTAVA, P. C., NEGI, D., and MEHROTRA, I.

Subjects
*NUCLEAR shell theory, *TIN isotopes, *NEUTRONS, *PARTICLES (Nuclear physics), *NUCLEAR models, *NUCLEAR energy
Abstract

We have performed shell model calculations for neutron deficient even 102-108Sn and odd 103-107Sn isotopes in sdg7/2h11/2 model space using two different interactions. The first set of interaction is due to Brown et al. and second is due to Hoska et al. The calculations have been performed using doubly magic 100Sn as core and valence neutrons are distributed over the single particle orbits 1g7/2, 2d5/2, 2d3/2, 3s1/2 and 1h11/2. In more recent experimental work for 101Sn [I. G. Darby et al., Phys. Rev. Lett.105 (2010) 162502], the g.s. is predicted as 5/2+ with excited 7/2+ at 172 keV. We have also performed another two set of calculations by taking difference in single particle energies of 2d5/2 and 1g7/2 orbitals by 172 keV. The present state-of-the-art shell model calculations predict fair agreement with the experimental data. These calculations serve as a test of nuclear shell model in the region far from stability for unstable Sn isotopes near the doubly magic 100Sn core. [ABSTRACT FROM AUTHOR]

Published
2012
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14. Discovery of 157W and 161Os

Author

Bianco, L., Page, R.D., Darby, I.G., Joss, D.T., Simpson, J., Al-Khalili, J.S., Cannon, A.J., Cederwall, B., Eeckhaudt, S., Ertürk, S., Gall, B., Hornillos, M.B. Gómez, Grahn, T., Greenlees, P.T., Hadinia, B., Heyde, K., Jakobsson, U., Jones, P.M., Julin, R., and Juutinen, S.

Subjects
*RADIOISOTOPES, *NUCLEAR reactions, *ION bombardment, *RADIOACTIVE decay, *HALF-life (Nuclear physics), *FINE-structure constant, *BRANCHING ratios, *FORCE & energy
Abstract

Abstract: The nuclides 157W and 161Os have been discovered in reactions of 58Ni ion beams with a 106Cd target. The 161Os α-decay energy and half-life were and . The daughter 157W nuclei β-decayed with a half-life of , populating both low-lying α-decaying states in 157Ta, which is consistent with a ground state in 157W. Fine structure observed in the α decay of 161Os places the lowest excited state in 157W with at . The branching ratio of indicates that 161Os also has a ground state. Shell-model calculations analysing the effects of monopole shifts and a tensor force on the relative energies of and neutron states in isotones are presented. [Copyright &y& Elsevier]

Published
2010
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15. g Factor of the isomer in 126Sn and first observation of spin-alignment in relativistic fission

Author

Ilie, G., Neyens, G., Simpson, G.S., Jolie, J., Blazhev, A., Grawe, H., Lozeva, R.L., Vermeulen, N., Atanasova, L., Balabanski, D.L., Becker, F., Bednarczyk, P., Brandau, C., Caceres, L., Chamoli, S.K., Daugas, J.M., Doornenbal, P., Gerl, J., Górska, M., and Grȩbosz, J.

Subjects
*NUCLEAR moments, *TIN isotopes, *NUCLEAR fission, *RELATIVISTIC mechanics, *NEUTRONS, *POLARIZATION (Nuclear physics)
Abstract

Abstract: We report on the g factor measurement of the isomeric state (, ) in the neutron-rich 126Sn nucleus. The nucleus was produced by the fission of a relativistic 238U beam and reaction products were selected by the FRS fragment separator at GSI. For the first time, spin-alignment was observed after relativistic fission. It was used to deduce the g factor of the isomeric state, , from the measured perturbed angular distribution of its γ decay using the RISING Cluster detectors. The observed value confirms the suggested dominant configuration, which has been proposed for the isomers in neutron-rich Sn isotopes. The failure of the g factor additivity rule and the importance of core polarization evolution with increasing distance from the doubly-magic 132Sn is discussed. The first observation of 18(8)% of spin-alignment produced by the relativistic fission of a 238U beam paves the way to study moments of neutron-rich (sub-)microsecond isomers, which are difficult to align by other means. [Copyright &y& Elsevier]

Published
2010
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16. High spin structure of 35Cl and the sd–fp shell gap

Author

Kshetri, Ritesh, Saha Sarkar, M., Ray, Indrani, Banerjee, P., Sarkar, S., Raut, Rajarshi, Goswami, A., Chatterjee, J.M., Chattopadhyay, S., Datta Pramanik, U., Mukherjee, A., Dey, C.C., Bhattacharya, S., Dasmahapatra, B., Bhowal, Samit, Gangopadhyay, G., Datta, P., Jain, H.C., Bhowmik, R.K., and Muralithar, S.

Subjects
*COLLISIONS (Nuclear physics), *NUCLEAR physics, *NUCLEAR energy, *SPECTRUM analysis
Abstract

Abstract: The high spin states of 35Cl have been studied by in-beam γ-spectroscopy following the fusion–evaporation reaction 12C(28 )35Cl at and 88 MeV, using the Indian National Gamma (Clover) Array (INGA). Lifetimes of six new excited states have been estimated for the first time. To understand the underlying structure of the levels and transition mechanisms, experimental results have been compared with those from the large basis cross-shell shell model calculations. Involvement of orbitals from fp shell and squeezing of the sd–fp shell gap seem to be essential for reliable reproduction of high spin states. [Copyright &y& Elsevier]

Published
2007
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17. Transition matrix elements for the exotic double-charge exchange conversion in 27Al

Author

Divari, P.C., Vergados, J.D., and Kosmas, T.S.

Subjects
*SUPERSYMMETRY, *MUONS, *POSITRONS, *LEPTONS (Nuclear physics)
Abstract

Abstract: The lepton and lepton flavor violating process of the muon-to-positron conversion in 27Al is studied with emphasis on mechanisms mediated by heavy neutrinos. We investigate two such cases: (i) the mode which involves only nucleons in the nucleus (nuclear mode) and (ii) the mode mediated by pions (1-pion and 2-pions in flight between the interacting nucleons). The nuclear wave functions for the initial state of 27Al and all accessible final states of 27Na are obtained in the framework of 1s–0d shell model employing the well-known Wildenthal realistic interaction. The total strength is calculated by summing over all excited states up to the energy . We found that the contributions from the 1-pion and nuclear mode are about eight times smaller than the 2-pion mode. [Copyright &y& Elsevier]

Published
2006
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18. Hindered E4 decay of the yrast trap in 52Fe

Author

Gadea, A., Lenzi, S.M., Napoli, D.R., Axiotis, M., Ur, C.A., Martínez-Pinedo, G., Górska, M., Roeckl, E., Caurier, E., Nowacki, F., de Angelis, G., Batist, L., Borcea, R., Brandolini, F., Cano-Ott, D., Döring, J., Fahlander, C., Farnea, E., Grawe, H., and Hellström, M.

Subjects
*NUCLEAR physics, *STATISTICAL correlation, *PROBABILITY theory, *MATHEMATICAL statistics
Abstract

Abstract: The γ decay of the yrast trap in 52Fe has been measured for the first time. The two E4 γ-branches to the states are hindered with respect to other reduced transition probabilities measured in the shell. The interpretation of the data is given in the full pf shell model framework, comparing the results obtained with different residual interactions. It is shown that measurements of hexadecapole transition probabilities constitute a powerful tool in discriminating the correct configuration of the involved wavefunctions. [Copyright &y& Elsevier]

Published
2005
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19. Beta decay of 57Zn*.

Author

Jokinen, A., Nieminen, A., Äystö, J., Borcea, R., Caurier, E., Dendooven, P., Gierlik, M., Górska, M., Grawe, H., Hellström, M., Karny, M., Janas, Z., Kirchner, R., Commara, M., Martinez-Pinedo, G., Mayet, P., Penttilä, H., Plochocki, A., Rejmund, M., and Roeckl, E.

Abstract

Beta-delayed proton decay of 57Zn has been investigated at the GSI on-line isotope separator. The studied 57Zn nuclei were produced in fusion evaporation reactions by using a 150 MeV 32S beam on a 28Si target. Beta-delayed protons were measured by a charged-particle telescope detector. The observed decay pattern was used to construct the level scheme of 57Cu and to extract the beta feeding distribution. The experimental results are compared with shell-model calculations. [ABSTRACT FROM AUTHOR]

Published
2002
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20. Observation of a $\gamma$-decaying millisecond isomeric state in $^{128}$Cd$_{80}$

Author

I. Kojouharov, Jan Taprogge, S. Ilieva, K. Moschner, A. Gargano, Hyo Soon Jung, Zhengyu Xu, P. A. Söderström, L. Coraggio, F. Naqvi, Ayumi Yagi, G. Benzoni, S. Bönig, Shunji Nishimura, Toshiyuki Sumikama, K. Yoshinaga, Zs. Vajta, Zena Patel, A. Jungclaus, Hiroyoshi Sakurai, Z. H. Li, G. D. Kim, F. Drouet, H. Grawe, N. Kurz, Hiroyuki Takeda, Young-Ki Kim, J. M. Daugas, T. Kröll, Younghun Kwon, F. Browne, G. J. Lane, Giuseppe Lorusso, A. Montaner-Pizá, R. Orlandi, H. Baba, H. Schaffner, Hiroshi Suzuki, Megumi Niikura, Nunzio Itaco, T. Isobe, D. Kameda, D. Mücher, Atsuko Odahara, F. G. Kondev, Guillaume Gey, Naoki Fukuda, P. Doornenbal, Hiroshi Watanabe, Zs. Podolyák, Jin Wu, K. Steiger, Hiroki Nishibata, Anna Wendt, K. Y. Chae, Naohito Inabe, Y. Shimizu, Gary Simpson, Toshiyuki Kubo, A. Gadea, Roman Gernhäuser, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut Laue-Langevin (ILL), ILL, Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Hungarian Scientific Research Fund, European Commission, Department of Energy (US), Science and Technology Facilities Council (UK), Federal Ministry of Education and Research (Germany), Helmholtz International Center for FAIR, German Research Foundation, SCOAP, National Research Foundation of Korea, Generalitat Valenciana, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia e Innovación (España), RIKEN Nishina Center for Accelerator-Based Science, Japan Society for the Promotion of Science, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Jungclaus, A., Grawe, H., Nishimura, S., Doornenbal, P., Lorusso, G., Simpson, G. S., Sã¶derstrã¶m, P. -. A., Sumikama, T., Taprogge, J., Xu, Z. Y., Baba, H., Browne, F., Fukuda, N., Gernhã¤user, R., Gey, G., Inabe, N., Isobe, T., Jung, H. S., Kameda, D., Kim, G. D., Kim, Y. -. K., Kojouharov, I., Kubo, T., Kurz, N., Kwon, Y. K., Li, Z., Sakurai, H., Schaffner, H., Shimizu, Y., Steiger, K., Suzuki, H., Takeda, H., Vajta, Z. S., Watanabe, H., Wu, J., Yagi, A., Yoshinaga, K., Benzoni, G., Bã¶nig, S., Chae, K. Y., Coraggio, L., Daugas, J. -. M., Drouet, F., Gadea, A., Gargano, A., Ilieva, S., Itaco, N., Kondev, F. G., Krã¶ll, T., Lane, G. J., Montaner-pizã¡, A., Moschner, K., Mã¼cher, D., Naqvi, F., Niikura, M., Nishibata, H., Odahara, A., Orlandi, R., Patel, Z., Podolyã¡k, Z. S., and Wendt, A.

Subjects
Shell model calculation, Nuclear and High Energy Physics, Fission, SHELL model, Nuclear Theory, Shell model calculations, Transition strengths, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, 0103 physical sciences, medicine, ddc:530, 010306 general physics, Nuclear Experiment, Physics, Millisecond, Radionuclide, Isomeric decay, 010308 nuclear & particles physics, Projectile, Parity (physics), lcsh:QC1-999, medicine.anatomical_structure, Isomeric decays, Physics::Accelerator Physics, Transition strength, Atomic physics, Nucleus, lcsh:Physics
Abstract

A. Jungclaus et al. -- 6 pags., 5 figs., 2 tabs. -- Open Access funded by Creative Commons Atribution Licence 4.0, A new high-spin isomer in the neutron-rich nucleus Cd was populated in the projectile fission of a U beam at the Radioactive Isotope Beam Factory at RIKEN. A half-life of T=6.3(8) ms was measured for the new state which was tentatively assigned a spin/parity of (15). The experimental results are compared to shell model calculations performed using state-of-the-art realistic effective interactions and to the neighbouring nucleus Cd. In the present experiment no evidence was found for the decay of a 18 E6 spin-trap isomer, based on the complete alignment of the two-neutron and two-proton holes in the 0h and the 0g orbit, respectively, which is predicted to exist by the shell model., We thank the staff of the RIKEN Nishina Center accelerator complex for providing stable beams with high intensities to the experiment. We acknowledge the EUROBALL Owners Committee for the loan of germanium detectors and the PreSpec Collaboration for the readout electronics of the cluster detectors. This work was supported by the Spanish Ministerio de Ciencia e Innovación under contract FPA2011-29854-C04 and the Spanish Ministerio de Economía y Competitividad under contract FPA2014-57196-C5-4-P, the Generalitat Valenciana (Spain) under grant PROMETEO/2010/101, the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (NRF-2014S1A2A2028636, 2016K1A3A7A09005579, 2016R1A5A1013277), the Priority Centers Research Program in Korea (2009-0093817), OTKA contract number K-100835, JSPS KAKENHI (Grant No. 25247045), the European Commission through the Marie Curie Actions call FP7-PEOPLE-2011-IEF under Contract No. 300096, the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357, the STFC (UK), the “RIKEN foreign research program”, the German BMBF (No. 05P12RDCIA, 05P12RDNUP and 05P12PKFNE), HIC for FAIR, the DFG cluster of excellence “Origin and Structure of the Universe” and DFG (Contract No. KR2326/2-1).

Published
2017
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21. Identification of a millisecond isomeric state in Cd81129 via the detection of internal conversion and Compton electrons

Author

Taprogge, J.(Instituto de Estructura de la Materia, CSIC, Madrid, E-28006, Spain), Jungclaus, A.(Instituto de Estructura de la Materia, CSIC, Madrid, E-28006, Spain), Grawe, H.(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany), Nishimura, S.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Xu, Z.Y.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Doornenbal, P.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Lorusso, G.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Nácher, E.(Instituto de Estructura de la Materia, CSIC, Madrid, E-28006, Spain), Simpson, G.S.(LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, Grenoble cedex, F-38026, France), Söderström, P.-A.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Sumikama, T.(Department of Physics, Tohoku University, Aoba, Sendai, Miyagi, 980-8578, Japan), Baba, H.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Browne, F.(School of Computing, Engineering and Mathematics, University of Brighton, Brighton, BN2 4JG, United Kingdom), Fukuda, N.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Gernhäuser, R.(Physik Department E12, Technische Universität München, Garching, D-85748, Germany), Gey, G.(LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, Grenoble cedex, F-38026, France), Inabe, N.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Isobe, T.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Jung, H.S.(Department of Physics, Chung-Ang University, Seoul, 156-756, Republic of Korea), Kameda, D.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Kim, G.D.(Rare Isotope Science Project, Institute for Basic Science, Daejeon, 305-811, Republic of Korea), Kim, Y.-K.(Rare Isotope Science Project, Institute for Basic Science, Daejeon, 305-811, Republic of Korea), Kojouharov, I.(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany), Kubo, T.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Kurz, N.(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany), Kwon, Y.K.(Rare Isotope Science Project, Institute for Basic Science, Daejeon, 305-811, Republic of Korea), Li, Z.(School of Physics, State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, 100871, China), Sakurai, H.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Schaffner, H.(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany), Steiger, K.(Physik Department E12, Technische Universität München, Garching, D-85748, Germany), Suzuki, H.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Takeda, H.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Vajta, Zs.(MTA Atomki, P.O. Box 51, Debrecen, H-4001, Hungary), Watanabe, H.(RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan), Wu, J.(School of Physics, State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, 100871, China), Yagi, A.(Department of Physics, Osaka University, Machikaneyama-machi 1-1, Toyonaka, Osaka, 560-0043, Japan), Yoshinaga, K.(Department of Physics, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan), Benzoni, G.(INFN, Sezione di Milano, via Celoria 16, Milano, I-20133, Italy), Bönig, S.(Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, D-64289, Germany), Chae, K.Y.(Department of Physics, Sungkyunkwan University, Suwon, 440-746, Republic of Korea), Coraggio, L.(Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Napoli, I-80126, Italy), Covello, A.(Dipartimento di Fisica, Università di Napoli Federico II, Complesso Universitario di Monte S. Angelo, Napoli, I-80126, Italy), Daugas, J.-M.(CEA, DAM, DIF, Arpajon cedex, 91297, France), Drouet, F.(LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, Grenoble cedex, F-38026, France), Gadea, A.(Instituto de Física Corpuscular, CSIC, Univ. of Valencia, Paterna, E-46980, Spain), Gargano, A.(Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Napoli, I-80126, Italy), Ilieva, S.(Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, D-64289, Germany), Kondev, F.G.(Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL, 60439, USA), Kröll, T.(Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, D-64289, Germany), Lane, G.J.(Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia), Montaner-Pizá, A.(Instituto de Física Corpuscular, CSIC, Univ. of Valencia, Paterna, E-46980, Spain), Moschner, K.(IKP, University of Cologne, Cologne, D-50937, Germany), Mücher, D.(Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, D-64289, Germany), Naqvi, F.(Wright Nuclear Structure Laboratory, Yale University, New Haven, CT, 06520-8120, USA), Niikura, M.(Department of Physics, University of Tokyo, Japan, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033), Nishibata, H.(Department of Physics, Osaka University, Machikaneyama-machi 1-1, Toyonaka, Osaka, 560-0043, Japan), Odahara, A.(Department of Physics, Osaka University, Machikaneyama-machi 1-1, Toyonaka, Osaka, 560-0043, Japan), Orlandi, R.(Instituut voor Kern- en Stralingsfysica, K.U. Leuven, Heverlee, B-3001, Belgium), Patel, Z.(Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom), Podolyák, Zs.(Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom), and Wendt, A.(IKP, University of Cologne, Cologne, D-50937, Germany)

Subjects
Isomeric decays, Shell model calculations, Nuclear Theory, Physics::Atomic and Molecular Clusters, Transition strengths, Nuclear Experiment, lcsh:Physics, lcsh:QC1-999
Abstract

The decay of an isomeric state in the neutron-rich nucleus 129Cd has been observed via the detection of internal conversion and Compton electrons providing first experimental information on excited states in this nucleus. The isomer was populated in the projectile fission of a 238U beam at the Radioactive Isotope Beam Factory at RIKEN. From the measured yields of γ-rays and internal conversion electrons, a multipolarity of E3 was tentatively assigned to the isomeric transition. A half-life of T1/2=3.6(2) ms was determined for the new state which was assigned a spin of (21/2+), based on a comparison to shell model calculations performed using state-of-the-art realistic effective interactions. Keywords: Isomeric decays, Transition strengths, Shell model calculations

Published
2014

22. Beta decay of 57Zn*

Author

Jokinen, A., Nieminen, A., Äystö, J., Borcea, R., Caurier, E., Dendooven, P., Gierlik, M., Górska, M., Grawe, H., Hellström, M., Karny, M., Janas, Z., Kirchner, R., Commara, M. La, Martinez-Pinedo, G., Mayet, P., Penttilä, H., Plochocki, A., Rejmund, M., Roeckl, E., Sawicka, M., Schlegel, C., Schmidt, K., and Schwengner, R.

Published
2002
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24. Discovery of W-157 and Os-161

Author

Bianco, L, Page, RD, Darby, IG, Joss, DT, Simpson, J, Al-Khalili, JJ, Cannon, AJ, Cederwall, B, Eeckhaudt, S, Erturk, S, Gall, B, Hornillos, MBG, Grahn, T, Greenlees, PT, Hadinia, B, Heyde, Kristiaan, Jakobsson, U, Jones, PM, Julin, R, Juutinen, S, Ketelhut, S, Labiche, M, Leino, M, Leppanen, AP, Nyman, M, O'Donnell, D, Paul, ES, Petri, M, Peura, P, Puurunen, A, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sapple, PJ, Saren, J, Scholey, C, Smirnova, NA, Steer, AN, Stevenson, PD, Suckling, EB, Thomson, J, Uusitalo, J, Venhart, M, Scholey, Catherine -- 0000-0002-8743-6071, Stevenson, Paul -- 0000-0003-2645-2569, O'Donnell, David -- 0000-0002-4710-3803, Petri, Marina -- 0000-0002-3740-6106, Cederwall, Bo -- 0000-0003-1771-2656, Darby, Iain -- 0000-0003-2091-2616, Jones, Pete -- 0000-0001-7480-6603, Jakobsson, Ulrika -- 0000-0001-9741-141X, Gomez Hornillos -- 0000-0002-9282-9195, Grahn, Tuomas -- 0000-0002-6255-2279, Peura, Pauli -- 0000-0002-8541-0169, and [Bianco, L. -- Page, R. D. -- Darby, I. G. -- Joss, D. T. -- Grahn, T. -- Paul, E. S. -- Petri, M. -- Sapple, P. J. -- Thomson, J.] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England -- [Simpson, J. -- Hornillos, M. B. Gomez -- Labiche, M. -- O'Donnell, D.] STFC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England -- [Al-Khalili, J. J. -- Cannon, A. J. -- Stevenson, P. D. -- Suckling, E. B.] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England -- [Cederwall, B. -- Hadinia, B. -- Sandzelius, M.] Royal Inst Technol, Alba Nova Ctr, S-10691 Stockholm, Sweden -- [Eeckhaudt, S. -- Greenlees, P. T. -- Jakobsson, U. -- Jones, P. M. -- Julin, R. -- Juutinen, S. -- Ketelhut, S. -- Leino, M. -- Leppanen, A. -P. -- Nyman, M. -- Peura, P. -- Puurunen, A. -- Rahkila, P. -- Ruotsalainen, P. -- Saren, J. -- Scholey, C. -- Steer, A. N. -- Uusitalo, J. -- Venhart, M.] Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland -- [Erturk, S.] Nigde Univ, Fen Edebiyat Fak, Fizik Bolumu, Nigde, Turkey -- [Gall, B.] ULP Strasbourg, IPHC, CNRS, IN2P3, F-67037 Strasbourg 2, France -- [Heyde, K.] Univ Ghent, Vakgrp Subatomaire Stralingsfysika, B-9000 Ghent, Belgium -- [Smirnova, N. A.] CEN Bordeaux Gradignan, F-33175 Gradignan, France

Subjects
Deduced neutron single-particle configurations in Os-161, W-157, Si detectors, NUCLEI, t(1/2), TOTAL DATA READOUT, Measured E alpha, t(1/2), Shell model calculations, NUCLEAR REACTIONS Ni-58+Cd-106 at 290, Physics and Astronomy, Measured E alpha, Deduced neutron single-particle configurations in Os-161, W-157, NEUTRON-DEFICIENT ISOTOPES, gas-filled recoil separator, PROTON DRIP-LINE, 310 MeV beam energy, NUCLEAR REACTIONS Ni-58+Cd-106 at 290, 300, 310 MeV beam energy, gas-filled recoil separator, Si detectors
Abstract

WOS: 000278933900003, The nuclides W-157 and Os-161 have been discovered ill reactions of Ni-58 ion beams with a Cd-106 target. The Os-161 alpha-decay energy and half-life were 6890 +/- 12 keV and 640 +/- 60 mu s. The daughter W-157 nuclei beta-decayed with a half-life of 275 +/- 40 ms, populating both low-lying alpha-decaying states in Ta-157, which is consistent with a 7/2(-) ground state in W-157. Fine structure observed in the alpha decay of Os-161 places the lowest excited state in W-157 with 1(pi) = 9/2(-) at 318 +/- 30 key. The branching ratio of 5.5(-2.2)(+3.1)% indicates that Os-161 also has a 7/2(-) ground state. Shell-model calculations analysing the effects of monopole shifts and a tensor force on the relative energies of 2f(7/2) and 1h(9/2) neutron states in N = 83 isotones are presented. (C) 2010 Elsevier B.V. All rights reserved., Jyvaskyla; United Kingdom Science and Technology Facilities Council; Swedish Natural Science Research Council; Academy of Finland [44875, 209430, 111965]; European Union [R113-CT-2004-506065, HPMT-CT-2001-00250]; Science and Technology Facilities Council [EP/C015266/1, EP/C015371/1, ST/G008671/1, ST/F012012/1, ST/J000108/1, EP/C543157/1, ST/G008620/1, ST/F012039/1], We thank the accelerator staff at Jyvaskyla for their excellent support and Paul Morrall from Daresbury Laboratory for making the targets. This work was supported by the United Kingdom Science and Technology Facilities Council; the Swedish Natural Science Research Council; the Academy of Finland through the Finnish Centre of Excellence Programme (project 44875 Nuclear and Condensed Matter Physics Programme at JYFL) and support for C.S. (contract 209430) and P.T.G. (contract 111965); the European Union Sixth Framework contract EURONS (R113-CT-2004-506065) and the European Union Marie Curie Programme (contract HPMT-CT-2001-00250).

Published
2010

25. g factor of the 7- isomer in 126Sn and first observation of spin-alignment in relativistic fission

Author

H. Schaffner, H. J. Wollersheim, A. Jungclaus, M. Ionescu-Bujor, R. Lozeva, J. Gerl, M. Pfützner, Gary Simpson, W. Prokopowicz, J. M. Daugas, T.R. Saito, O. Perru, F. Becker, C. Brandau, S. K. Chamoli, M. De Rydt, S. Mallion, P. Bednarczyk, J. Jolie, I. Kojouharov, Michael Hass, N. Vermeulen, H. Grawe, A. Blazhev, N. Kurz, L. Caceres, Gerda Neyens, P. Doornenbal, A. Maj, G. Ilie, Zs. Podolyák, J. Walker, M. Górska, J. Grȩbosz, D. L. Balabanski, K. Turzó, M. Kmiecik, L. Atanasova, E. Werner-Malento, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
Physics, Nuclear and High Energy Physics, Angular momentum, Cluster decay, Isotope, Nuclear moments, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Fission, g factor, Nuclear Theory, Shell model calculations, Lifetimes, Projectile fission reactions, 01 natural sciences, Microsecond, 0103 physical sciences, Neutron, Atomic physics, 010306 general physics, Nuclear Experiment, Beam (structure)
Abstract

We report on the g factor measurement of the isomeric 7 − state ( E * = 2219 keV , T 1 / 2 = 5.9 ( 8 ) μs ) in the neutron-rich 126Sn nucleus. The nucleus was produced by the fission of a relativistic 238U beam and reaction products were selected by the FRS fragment separator at GSI. For the first time, spin-alignment was observed after relativistic fission. It was used to deduce the g factor of the 7 − isomeric state, g ( 7 − ) = − 0.098 ( 9 ) , from the measured perturbed angular distribution of its γ decay using the RISING Cluster detectors. The observed value confirms the suggested ν ( h 11 / 2 − 1 d 3 / 2 − 1 ) dominant configuration, which has been proposed for the 7 − isomers in neutron-rich Sn isotopes. The failure of the g factor additivity rule and the importance of core polarization evolution with increasing distance from the doubly-magic 132Sn is discussed. The first observation of 18(8)% of spin-alignment produced by the relativistic fission of a 238U beam paves the way to study moments of neutron-rich (sub-)microsecond isomers, which are difficult to align by other means.

Published
2010
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26. Discovery of W-157 and Os-161

Author

Bianco, L., Page, R. D., Darby, I. G., Joss, D. T., Simpson, J., Al-Khalili, J. J., Greenlees, P. T., and 0-Belirlenecek

Subjects
Deduced neutron single-particle configurations in Os-161, W-157, Measured E alpha, t(1/2), Shell model calculations, NUCLEAR REACTIONS Ni-58+Cd-106 at 290, 300, 310 MeV beam energy, gas-filled recoil separator, Si detectors
Abstract

WOS: 000278933900003, The nuclides W-157 and Os-161 have been discovered ill reactions of Ni-58 ion beams with a Cd-106 target. The Os-161 alpha-decay energy and half-life were 6890 +/- 12 keV and 640 +/- 60 mu s. The daughter W-157 nuclei beta-decayed with a half-life of 275 +/- 40 ms, populating both low-lying alpha-decaying states in Ta-157, which is consistent with a 7/2(-) ground state in W-157. Fine structure observed in the alpha decay of Os-161 places the lowest excited state in W-157 with 1(pi) = 9/2(-) at 318 +/- 30 key. The branching ratio of 5.5(-2.2)(+3.1)% indicates that Os-161 also has a 7/2(-) ground state. Shell-model calculations analysing the effects of monopole shifts and a tensor force on the relative energies of 2f(7/2) and 1h(9/2) neutron states in N = 83 isotones are presented. (C) 2010 Elsevier B.V. All rights reserved., Jyvaskyla; United Kingdom Science and Technology Facilities Council; Swedish Natural Science Research Council; Academy of Finland [44875, 209430, 111965]; European Union [R113-CT-2004-506065, HPMT-CT-2001-00250]; Science and Technology Facilities Council [EP/C015266/1, EP/C015371/1, ST/G008671/1, ST/F012012/1, ST/J000108/1, EP/C543157/1, ST/G008620/1, ST/F012039/1], We thank the accelerator staff at Jyvaskyla for their excellent support and Paul Morrall from Daresbury Laboratory for making the targets. This work was supported by the United Kingdom Science and Technology Facilities Council; the Swedish Natural Science Research Council; the Academy of Finland through the Finnish Centre of Excellence Programme (project 44875 Nuclear and Condensed Matter Physics Programme at JYFL) and support for C.S. (contract 209430) and P.T.G. (contract 111965); the European Union Sixth Framework contract EURONS (R113-CT-2004-506065) and the European Union Marie Curie Programme (contract HPMT-CT-2001-00250).

Published
2010

27. Spectroscopy of neutron-rich Fe isotopes populated in the 64Ni+238U reaction

Author

Lunardi, S., Lenzi, S.M., Della Vedova, F., Farnea, E., Gadea, A., M&#259rginean, N., Bazzacco, D., Beghini, S., Bizzeti, P.G., Bizzeti-Sona, A.M., Bucurescu, D., Corradi, L., Deacon, A.N., De Angelis, G., Fioretto, E., Freeman, S.J., Ionescu-Bujor, M., Iordachescu, A., Mason, P., Mengoni, D., Montagnoli, G., Napoli, D.R., Nowacki, F., Orlandi, R., Pollarolo, G., Recchia, F., Scarlassara, F., Smith, J.F., Stefanini, A.M., Szilner, S., Ur, C.A., Valiente-Dobón, J.J., Varley, B.J., Département Recherches Subatomiques (DRS-IPHC), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)

Subjects
21.10.Re, 21.60.Cs, 23.20.Lv, 27.50.+e, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, reaction 64Ni+238U, neutron-rich Fe isotopes, level structure, shell model calculations
Abstract

The neutron-rich Fe isotopes from A=61 to 66 were studied through multinucleon transfer reactions by bombarding a $^{238}$U target with a 400 MeV $^{64}$Ni beam. Unambiguous identification of prompt $\gamma$ rays belonging to each nucleus was achieved using coincidence relationships with the ions detected in a high-acceptance magnetic spectrometer. The new data extend our knowledge of the level structure of Fe isotopes, which is discussed in terms of the systematics of the region and compared with large-scale shell-model calculations.

Published
2007
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28. Hindered E4 decay of the 12+ yrast trap in 52Fe

Author

C. A. Ur, Claes Fahlander, F. Nowacki, D. Cano-Ott, Magnus Hellström, F. Brandolini, Z. Janas, E. Roeckl, R. Kirchner, H. Grawe, M. La Commara, C. Plettner, E. Caurier, Gabriel Martínez-Pinedo, C. Mazzocchi, M. Górska, J. Döring, A. Gadea, Berta Rubio, Ronald Schwengner, K.-H. Schmidt, Enrique Nácher, J. Żylicz, M. Axiotis, D. R. Napoli, J. L. Tain, G. de Angelis, L. Batist, S. M. Lenzi, E. Farnea, R. Borcea, and A. Płochocki

Subjects
Physics, Nuclear and High Energy Physics, Yrast, Nuclear Theory, SHELL model, Shell model calculations, Nuclear structure, Shell (structure), Gamma ray, Yrast trap, Residual, Trap (computing), Atomic physics, Wave function
Abstract

The gamma decay of the 12(+) yrast trap in Fe-52 has been measured for the first time. The two E4 gamma-branches to the 8(+) states are hindered with respect to other B(E4) reduced transition probabilities measured in the f(7/2) shell. The interpretation of the data is given in the full pf shell model framework, comparing the results obtained with different residual interactions. It is shown that measurements of hexadecapole transition probabilities constitute a powerful tool in discriminating the correct configuration of the involved wavefunctions.

Published
2005

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