NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = U.C.Perera Found 5 matches. 2024TA08 Phys.Rev. C 109, 024321 (2024) A.Taninah, B.Osei, A.V.Afanasjev, U.C.Perera, S.Teeti Toward accurate nuclear mass tables in covariant density functional theory
doi: 10.1103/PhysRevC.109.024321
2023PE09 Phys.Rev. C 107, 064321 (2023) Differential charge radii: Proton-neutron interaction effects NUCLEAR STRUCTURE 198,200,202,204,206,208,210,212,214,216,218Pb; calculated differential charge radii. 218Pb; calculated proton single-particle density redistributions caused by the occupation of neutron subshells, contributions of different spherical subshells to the buildup of differential charge radii. 208,218Pb; single-particle wave functions of proton and neutron subshells. Calculations were performed within the framework of covariant density functional theory (CDFT) with NL3* functional. Comparison with experimental data.
doi: 10.1103/PhysRevC.107.064321
2022PE14 Phys.Rev. C 106, 024321 (2022) Bubble nuclei: Single-particle versus Coulomb interaction effects NUCLEAR STRUCTURE 34Si, 36S, 208Pb, 292120, 310126, 466156, 592186; calculated proton and neutron densities as a function of radial coordinate, rms radii of proton and neutron matter distributions, Coulomb potentials, nucleonic potentials and occupied single-particle states of the ground state configurations, total density from the contributions of spherical subshells as function of orbital angular momentum, Single-particle densities of the s-states occupied in the bubble nuclei, depletion factor for proton and neutron subsystems, proton and neutron potentials. 208Pb, 292120, 310126; calculated density distributions for protons and neutrons, single-particle neutrons, and single-particle neutron and proton s-states. 34Si, 36S; calculated Single-particle proton and neutron density distributions of the occupied states. 208,220,230,246,254Pb, 268Cm, 278Sg, 292,302,304120, 310126; calculated changes in proton and neutron densities with increasing proton and neutron numbers. 56Ni, 100Sn, 164Pb, 240120, 252126, 312156, 372186; calculated proton and neutron densities, proton and neutron nucleonic potentials, depletion factors for proton and neutron subsystems for N=Z nuclei. 592186; calculated single-particle states. 292120, 310126; calculated nucleonic potentials for the single-proton states located between the Fermi level and the top of the Coulomb barrier and for the neutron single-particle states located below the continuum threshold. 312,466156, 372,592186; calculated proton and neutron densities. 372,592186; calculated neutron and proton single-particle states. 254No, 276Cn; calculated Coulomb potentials in deformed ground state and excited spherical solution of the nuclei using RHB. Covariant density functional theory for the formation of bubble structures in nuclei with emphasis on the role of the single-particle degrees of freedom and Coulomb interaction.
doi: 10.1103/PhysRevC.106.024321
2021DA16 Phys.Rev. C 104, 054322 (2021) T.Day Goodacre, A.V.Afanasjev, A.E.Barzakh, L.Nies, B.A.Marsh, S.Sels, U.C.Perera, P.Ring, F.Wienholtz, A.N.Andreyev, P.Van Duppen, N.A.Althubiti, B.Andel, D.Atanasov, R.S.Augusto, J.Billowes, K.Blaum, T.E.Cocolios, J.G.Cubiss, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, L.P.Gaffney, L.Ghys, A.Gottberg, M.Huyse, S.Kreim, P.Kunz, D.Lunney, K.M.Lynch, V.Manea, Y.Martinez Palenzuela, T.M.Medonca, P.L.Molkanov, M.Mougeot, J.P.Ramos, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, P.Spagnoletti, C.Van Beveren, M.Veinhard, E.Verstraelen, A.Welker, K.Wendt, R.N.Wolf, A.Zadvornaya, K.Zuber Charge radii, moments, and masses of mercury isotopes across the N=126 shell closure NUCLEAR MOMENTS 198,202,203,206,207,208Hg; measured hyperfine structure spectra using Versatile Arc Discharge and Laser Ion Source (VADLIS) in CERN-ISOLDE Resonance Ionization Laser Ion Source (RILIS) mode; deduced isotope shifts (δν) and charge radii (δ<r2) with respect to 198Hg, hyperfine factors a and b, static magnetic dipole (μ) and electric quadrupole (Q) moments for the ground states of 203Hg and 207Hg, Comparison of g factors with Schmidt values for 207Hg, 209Pb, 210Bi and 211Po, and charge radii, and odd-even staggering (OES) of the mean square charge radii with relativistic Hartree-Bogoliubov (RHB) calculations using DD-ME2, DD-MEδ, DD-PC1 and NL3* covariant energy-density functionals for 197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214Pb, 201,202,203,204,205,206,207,208,209,210Hg. Source of Hg isotopes were produced in Pb(p, X), E=1.4 GeV reaction, and using VADLIS+RILIS ion source, followed by separation of fragments using ISOLDE General Purpose Separator. 183,184,185,202,203,206,207,208Hg; measured ionization and release efficiency as a function of the half-life of mercury isotopes from a molten lead target, and compared with ABRABLA, FLUKA, and GEANT4 simulations. ATOMIC MASSES 206,207,208Hg, 208Pb; measured time-of-flight ion-cyclotron resonances, with reference to 208Pb using the RILIS+VADIS ion source and ISOLTRAP MR-ToF mass spectrometer (MS) at CERN-ISOLDE; deduced mass excesses for 206,207,208Hg, and compared with AME2020 values.
doi: 10.1103/PhysRevC.104.054322
2021PE14 Phys.Rev. C 104, 064313 (2021) U.C.Perera, A.V.Afanasjev, P.Ring Charge radii in covariant density functional theory: A global view NUCLEAR STRUCTURE 208Pb, 132Sn, 40,48Ca; calculated neutron and proton single-particle states at spherical shape, charge radius, neutron skin, neutron single-particle rms radii without pairing, using DDME2, DDMEδ, DDPC1, NL3*, and PCPK1 interactions. 134Sn; calculated occupation probabilities of the neutron orbitals located above the N=82 shell closure. 198,200,202,204,206,208,210,212,214,216Pb; 176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246,248,250,252,254,256,258,260,262,264,266Pb; calculated rms charge radii without and with pairing, the latter using RHB approach, using DDME2, DDMEδ, DDPC1, NL3*, and PCPK1 interactions and for all the even-even Pb isotopes located between the two-proton and two-neutron drip lines, compared to available experimental data. Z=78, 80, 82, 84, 86, N=104-136 (even); Z=50, 52, 54, 56, 58, 60, 62, 64, N=50-100 (even); Z=36, 38, 42, N=32-70 (even); Z=18, 20, 22, 24, 26, N=12-38 (even); 100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134,136Sn, 72,74,76,78,80,82,84,86,88,90,92,94,96,98,100,102,104,106,108Sr, 34,36,38,40,42,44,46,48,50,52,54,56,58,60Ca; calculated charge radii δ(r2) for even-even nuclei as function of neutron number using DDME2, DDMEδ, DDPC1, NL3*, and PCPK1 interactions, and compared with available experimental data. Z=10, N=9-15; Z=18, N=15-25; Z=20, N=17-31; Z=22, N=23-27; Z=36, N=39-59; Z=38, N=40-61; Z=48, N=55-69; Z=50, N=59-81; Z=54, N=83-89; Z=56, N=65-89; Z=60, N=75-85; Z=62, N=77-91; Z=66, N=83-97; Z=70, N=85-105; Z=72, N=99-107; Z=78, N=101-117; Z=80, N=98-125; Z=82, N=101-129; Z=84, N=108-126; Z=86, N=119-125, 133-135; Z=88, N=121-125, 133-141; Z=90, N=138-139; Z=92, N=142-143; Z=94, N=145-147; compiled odd-even staggering (OES) of experimental charge radii of even-Z nuclei. 30,32,34,36,38,40,42,44,46,48,50Ar, 32,34,36,38,40,42,44,46,48,50,52Ca, 38,40,42,44,46,48,50,52,54,56,58Ti, 44,46,48,50,52,54,56,58,60,62,64Cr, 46,48,50,52,54,56,58,60,62,64Fe, 68,70,72,74,76,78,80,82,84,86,88Kr, 72,74,76,78,80,82,84,86,88,90,92,94,96,98,100Sr, 80,82,84,86,88,90,92,94,96,98,100,102,104,106,108Mo, 94,96,98,100,102,104,106,108,110,112,114Cd, 100,102,104,106,108,110,112,114,116,118,120Sn, 108,110,112,114,116,118,120,122,124,126,128Te, 110,112,114,116,118,120,122,124,126,128,130Xe, 114,116,118,120,122,124,126,128,130,132,134Ba, 118,120,122,124,126,128,130,132,134,136,138Ce, 122,124,126,128,130,132,134,136,138,140,142Nd, 128,130,132,134,136,138,140,142,144,146,148Sm, 132,134,136,138,140,142,144,146,148,150,152Gd, 178,180,182,184,186,188,190,192,194,196,198Pt, 184,186,188,190,192,194,196,198,200,202,204Po, 186,188,190,192,194,196,198,200,202,204,206Rn; calculated potential energy curves as function of deformation parameter β2 obtained with constrained axial RHB calculations using DDME2, DDMEδ, DDPC1, NL3*, and PCPK1 covariant energy density functionals; deduced β2 parameters in different mass regions. These data are from Supplemental Material of the paper. Detailed systematic global investigation of differential charge radii within the covariant density functional theory (CDFT) framework.
doi: 10.1103/PhysRevC.104.064313
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