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NSR database version of May 24, 2024.

Search: Author = I.Dedes

Found 12 matches.

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2023YA15      Phys.Rev. C 107, 054304 (2023)

J.Yang, J.Dudek, I.Dedes, A.Baran, D.Curien, A.Gaamouci, A.Gozdz, A.Pedrak, D.Rouvel, H.L.Wang

Islands of oblate hyperdeformed and superdeformed superheavy nuclei with D3h point group symmetry in competition with normal-deformed D3h states: "Archipelago" of D3h-symmetry islands

NUCLEAR STRUCTURE 302Og, 292124, 318130; calculated contours of projections of the total nuclear energy surfaces on (α22, α20), (α33, α20), ( α33, α22) and (α30, α20) planes, deformation parameters. N=166-206;Z=116-138; calculated single-particle neutron and proton energy levels, shell energies defined as sums of the Strutinsky and pairing correction energies, D3h-symmetric hyperdeformed, superdeformed, and normal-deformed configurations. Found three separate islands of nuclei with D3h symmetry ("archipelago of three islands") differing by their average α20 < 0 deformations. Macroscopic-microscopic method with a realistic phenomenological Woods-Saxon potential.

doi: 10.1103/PhysRevC.107.054304
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2022PO02      Phys.Rev. C 105, L041301 (2022)

W.S.Porter, B.Ashrafkhani, J.Bergmann, C.Brown, T.Brunner, J.D.Cardona, D.Curien, I.Dedes, T.Dickel, J.Dudek, E.Dunling, G.Gwinner, Z.Hockenbery, J.D.Holt, C.Hornung, C.Izzo, A.Jacobs, A.Javaji, B.Kootte, G.Kripko-Koncz, E.M.Lykiardopoulou, T.Miyagi, I.Mukul, T.Murbock, W.R.Plass, M.P.Reiter, J.Ringuette, C.Scheidenberger, R.Silwal, C.Walls, H.L.Wang, Y.Wang, J.Yang, J.Dilling, A.A.Kwiatkowski

Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

ATOMIC MASSES 63,64,65,65m,66,67,68,69,69m,70Fe; measured time-of-flight; deduced mass excess, S(2n), pairing gap. Systematics of S(2n) values for Z=24–28 isotope chains. Compared to mean-field calculations employing recent Woods-Saxon Hamiltonian and results from the multishell valence-space in-medium similarity renormalization group (VS-IMSRG). Comparison to recommended values from AME2020. TITAN (TRIUMF’s Ion Trap for Atomic and Nuclear science) Multiple-Reflection Time-of- Flight Mass Spectrometer.

doi: 10.1103/PhysRevC.105.L041301
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2022YA11      Phys.Rev. C 105, 034348 (2022)

J.Yang, J.Dudek, I.Dedes, A.Baran, D.Curien, A.Gaamouci, A.Gozdz, A.Pedrak, D.Rouvel, H.L.Wang, J.Burkat

Exotic shape symmetries around the fourfold octupole magic number N=136: Formulation of experimental identification criteria

NUCLEAR STRUCTURE N=122-164; calculated single-particle neutron levelsand Routhians as functions of α30, α31, α32 and α33 octupole deformations; deduced very large neutron shell gaps at N=136 for all the four octupole deformations, and N=136 as a "universal or fourfold octupole magic number". 208,212,216,218Pb, 218,220,222,224Ra, 220Po, 222Rn, 224Ra, 226Th; calculated contours of projections of the total nuclear energy surfaces on (α30, α20) planes for all the isotopes, (α31, α20), (α32, α20), and (α33, α20) planes for 218Pb, (α32, α20) planes for 218,220, 222,224Ra, and (α31, α20) and (α32, α20) planes for 220Po, 222Rn, 224Ra, 226Th. Discussed exotic point-group symmetries C, D2d, Td (tetrahedral symmetry), and D3h in order to formulate spectroscopic criteria for experimental identifications through analysis of collective rotational bands generated by the symmetries. Macroscopic-microscopic method in multidimensional deformation spaces to analyze the expected exotic symmetries and octupole shape instabilities, tetrahedral point group symmetry, and realistic nuclear mean-field theory using phenomenological Woods-Saxon Hamiltonian combined with the Monte Carlo approach. Comparison with available experimental nuclear octupole deformations.

doi: 10.1103/PhysRevC.105.034348
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2022YA26      Phys.Rev. C 106, 054314 (2022)

J.Yang, J.Dudek, I.Dedes, A.Baran, D.Curien, A.Gaamouci, A.Gozdz, A.Pedrak, D.Rouvel, H.L.Wang

Exotic symmetries as stabilizing factors for superheavy nuclei: Symmetry-oriented generalized concept of nuclear magic numbers

NUCLEAR STRUCTURE Z=82-138, N=164-258; calculated single-particle proton and neutron energies, spherical orbital energies and shell gaps. 314Og; calculated Monte Carlo simulated probability distributions of single-particle level position uncertainties for protons and neutrons. 308122; calculated proton and neutron single-particle energies as functions of the octupole deformations α30, α31, α32 and α33 in the center of Z=114-130, N=166-206 region. 310Fl, 314Og, 318122, 322126, 326130; calculated potential-energy projection contours as functions of quadrupole deformation parameter α20 and octupole deformation parameters α30, α31, α32 and α33 for 310Fl, and α32 for others. 296,298,300,302,304,306,308,310,312,314,316Sg, 304,306,308,310,312,314,316,318,320,322,324Fl, 310Fl, 314,316,318,320,322,324,326,328,330,332,334124, 312Lv, 314Og, 316120, 318122, 320124, 322126, 324128, 326130, 328132, 330134, 332136; calculated nuclear shell energies as functions of octupole deformation parameters α30, α31, α32 and α33, comparisons of nuclear shell-energies as functions of quadrupole deformation α20, and octupole deformation parameters α30 (pear-shaped), α31, α32, and α33 for Z-114, N=190-210, and for N=196, Z=114-136 nuclei. 296,298,300,302,304,306,308,310,312,314,316Sg, 314,316,318,320,322,324,326,328,330,332,334124; calculated energies at the equilibrium before and after allowing the α32 minimization. 280,282,284,286,288,290,292,294,296,298,300,302,304,306,308,310,312,314,316,318,320Fl, 282,284,286,288,290,292,294,296,298,300,302,304,306,308,310,312,314,316,318,320,322Lv, 284,286,288,290,292,294,296,298,300,302,304,306,308,310,312,314,316,318,320,322,324Og, 286,288,290,292,294,296,298,300,302,304,306,308,310,312,314,316,318,320,322,324,326120, 288,290,292,294,296,298,300,302,304,306,308,310,312,314,316,318,320,322,324,326,328122, 290,292,294,296,298,300,302,304,306,308,310,312,314,316,318,320,322,324,326,328,330124, 292,294,296,298,300,302,304,306,308,310,312,314,316,318,320,322,324,326,328,330,332126, 294,296,298,300,302,304,306,308,310,312,314,316,318,320,322,324,326,328,330,332,334128, 296,298,300,302,304,306,308,310,312,314,316,318,320,322,324,326,328,330,332,334,336130; predicted quadrupole deformation α2, components of octupole deformation α30, α31, α32 and α33 for the ground states, energy differences between the nearest quadrupole-shape minima and octupole-deformed configurations; deduced spherical or octupole deformed, with dominance of octupole-tetrahedral geometry for a majority of superheavy nuclei, which lowers the ground-state energy by up to 8 MeV. Realistic phenomenological mean-field approach with the deformed Woods-Saxon potential and macroscopic-microscopic method to examine impact of exotic shapes of nuclei associated with the four-fold octupole degrees of freedom on the stabilization of superheavy nuclei in the mass range of Z=114-130, and N=166-206.

doi: 10.1103/PhysRevC.106.054314
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2021BE23      Phys.Rev.Lett. 127, 112501 (2021)

S.Beck, B.Kootte, I.Dedes, T.Dickel, A.A.Kwiatkowski, E.M.Lykiardopoulou, W.R.Plass, M.P.Reiter, C.Andreoiu, J.Bergmann, T.Brunner, D.Curien, J.Dilling, J.Dudek, E.Dunling, J.Flowerdew, A.Gaamouci, L.Graham, G.Gwinner, A.Jacobs, R.Klawitter, Y.Lan, E.Leistenschneider, N.Minkov, V.Monier, I.Mukul, S.F.Paul, C.Scheidenberger, R.I.Thompson, J.L.Tracy, Jr., M.Vansteenkiste, H.-L.Wang, M.E.Wieser, C.Will, J.Yang

Mass Measurements of Neutron-Deficient Yb Isotopes and Nuclear Structure at the Extreme Proton-Rich Side of the N=82 Shell

ATOMIC MASSES 150,151,152,153,154,155,156Yb; measured frequencies, TOF; deduced mass excess values. Comparison with systematics, AME2020 evaluation. TITAN's multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS).

RADIOACTIVITY 151Yb(IT); measured decay products; deduced excitation energy.

doi: 10.1103/PhysRevLett.127.112501
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2021GA18      Phys.Rev. C 103, 054311 (2021)

A.Gaamouci, I.Dedes, J.Dudek, A.Baran, N.Benhamouda, D.Curien, H.L.Wang, J.Yang

Exotic toroidal and superdeformed configurations in light atomic nuclei: Predictions using a mean-field Hamiltonian without parametric correlations

NUCLEAR STRUCTURE 28Si, 28,30,38,40Si, 32,40,42S, 36Ar, 40Ca, 44Ti, 48Cr, 56Ni, 52,56Fe, 82,84,100Zr; A≈30-50; calculated nuclear potential energy surfaces in (α20, α40) and (β2cos(γ+30°)), (β2sin(γ+30°)) planes using mean-field calculations in multidimensional deformation spaces with phenomenological Woods-Saxon Hamiltonian, Monte-Carlo Hamiltonian parameter adjustments based on doubly-magic spherical nuclei: 16O, 40Ca, 48Ca, 56Ni, 90Zr, 132Sn, 146Gd and 208Pb, parametric-correlation removal; tested parametric uncertainties, theoretical prediction uncertainty propagation with nucleon numbers; generated nuclear shape coexistence, low-energy toroidal shape excitations, superdeformed oblate and prolate shapes, exotic shapes and isomers. Comparison with available experimental information for deformation parameters.

doi: 10.1103/PhysRevC.103.054311
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2020HO03      Phys.Lett. B 802, 135200 (2020)

C.Hornung, D.Amanbayev, I.Dedes, G.Kripko-Koncz, I.Miskun, N.Shimizu, S.Ayet S.Andres, J.Bergmann, T.Dickel, J.Dudek, J.Ebert, H.Geissel, M.Gorska, H.Grawe, F.Greiner, E.Haettner, T.Otsuka, W.R.Plass, S.Purushothaman, A.-Ka.Rink, C.Scheidenberger, H.Weick, S.Bagchi, A.Blazhev, O.Charviakova, D.Curien, A.Finlay, S.Kaur, W.Lippert, J.-H.Otto, Z.Patyk, S.Pietri, Y.K.Tanaka, Y.Tsunoda, J.S.Winfield

Isomer studies in the vicinity of the doubly-magic nucleus 100Sn: Observation of a new low-lying isomeric state in 97Ag

RADIOACTIVITY 97Ag, 101,103,105,107,109In(IT) [from 9Be(124Xe, X), E=600 MeV/nucleon]; measured decay products, mass-to-charge spectra; deduced mass excess, excitation energies. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2020.135200
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2019DE16      Phys.Rev. C 99, 054310 (2019)

I.Dedes, J.Dudek

Propagation of the nuclear mean-field uncertainties with increasing distance from the parameter adjustment zone: Applications to superheavy nuclei

NUCLEAR STRUCTURE 208Pb, 278,284,286,294,298,310,328,342Fl; calculated levels, probability distributions of uncertainties in neutron and proton single particle energies by combining the inverse problem theory with the Monte Carlo approach to obtain estimates of the uncertainty distributions for modeling predictions.

doi: 10.1103/PhysRevC.99.054310
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2019DU22      Acta Phys.Pol. B50, 685 (2019)

J.Dudek, I.Dedes, J.Yang, A.Baran, D.Curien, T.Dickel, A.Gozdz, D.Rouvel, H.L.Wang

High-rank Symmetries in Nuclei: Challenges for Prediction Capacities of the Nuclear Mean-field Theories

NUCLEAR STRUCTURE 226Th; calculated total nuclear energy surfaces. Discussed the possible structure of rotational bands in cases of tetrahedral and octahedral nuclear symmetries. Mean-field approach with the phenomenological “universal” Woods–Saxon Hamiltonian.

doi: 10.5506/aphyspolb.50.685
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2019SA61      J.Phys.(London) G46, 055102 (2019); Corrigendum J.Phys.(London) G46, 109501 (2019)

A.Saha, T.Bhattacharjee, D.Curien, J.Dudek, I.Dedes, K.Mazurek, A.Gozdz, S.Tagami, Y.R.Shimizu, S.R.Banerjee, S.Rajbanshi, A.Bisoi, G.de Angelis, S.Bhattacharya, S.Bhattacharyya, S.Biswas, A.Chakraborty, S.Das Gupta, B.Dey, A.Goswami, D.Mondal, D.Pandit, R.Palit, T.Roy, R.P.Singh, M.S.Sarkar, S.Saha, J.Sethi

Spectroscopy of a tetrahedral doubly magic candidate nucleus 16070Yb90

NUCLEAR REACTIONS 148Sm(16O, 4n)160Yb, E=90 MeV; measured reaction products, Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(θ)(ADO) and γγ(linearpol) using INGA array of 20 Compton-suppressed HPGe clover detectors at TIFR pelletron facility. 160Yb; deduced high-spin levels, J, π, multipolarities, rotational bands, alignments, tetrahedral deformation. Systematics of g.s. and negative-parity bands in 152,154,156Gd.

doi: 10.1088/1361-6471/ab0573
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2018DU02      Phys.Rev. C 97, 021302 (2018)

J.Dudek, D.Curien, I.Dedes, K.Mazurek, S.Tagami, Y.R.Shimizu, T.Bhattacharjee

Spectroscopic criteria for identification of nuclear tetrahedral and octahedral symmetries: Illustration on a rare earth nucleus

NUCLEAR STRUCTURE 152Sm; calculated realistic mean-field total nuclear energy; analyzed energy levels. Comparison with group theory predictions, nuclear point-group symmetries, nuclear tetrahedral and octahedral symmetries. Spectral analysis based on irreducible representations; deduced criteria for identification of tetrahedral and octahedral symmetries. Realistic nuclear mean-field theory calculations with the phenomenological macroscopic-microscopic method, the Gogny-Hartree-Fock-Bogoliubov approach.

doi: 10.1103/PhysRevC.97.021302
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2018SA07      Phys.Scr. 93, 034001 (2018)

A.Saha, T.Bhattacharjee, D.Curien, I.Dedes, K.Mazurek, S.R.Banerjee, S.Rajbanshi, A.Bisoi, G.de Angelis, S.Bhattacharya, S.Bhattacharyya, S.Biswas, A.Chakraborty, S.Das Gupta, B.Dey, A.Goswami, D.Mondal, D.Pandit, R.Palit, T.Roy, R.P.Singh, M.S.Sarkar, S.Saha, J.Sethi

Excited negative parity bands in 160Yb

NUCLEAR REACTIONS 148Sm(16O, 4n)160Yb, E=90 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, B(E2)/B(E1) ratios, non-yrast negative parity structures, bands. Comparison with energy calculation results obtained using the standard Woods-Saxon universal Hamiltonian.

doi: 10.1088/1402-4896/aaa1fa
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Data from this article have been entered in the XUNDL database. For more information, click here.


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