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Search: Author = K.Heyde

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2020GA31      Phys.Rev. C 102, 054333 (2020)

J.E.Garcia-Ramos, K.Heyde

Subtle connection between shape coexistence and quantum phase transition: The Zr case

NUCLEAR STRUCTURE 94,96,98,100,102,104,106,108,110Zr; calculated E(first 4+)/E(first 2+), S(2n), radii square with reference to 90Zr, energies of the unperturbed regular and intruder IBM bandheads with reference to ground-state energies, β2 corresponding to the unperturbed regular and intruder configurations, matrix coherent-state potential energy surface along the axial axis, matrix coherent-state potential energy surfaces in (β, γ) plane, U(5) decomposition of the yrast band and other states in regular and the intruder configurations, number of 0+ and other states below 4 MeV excitation, shape coexistence or with a quantum phase transition. 100,102Zr, 152Sm; calculated B(E2) and compared to values in X(5) limit. 94Zr; calculated ρ2(E0) for first excited 0+ state to ground state. Interacting boson model calculations with configuration mixing (IBM-CM). Comparison with experimental data. 90,92,94,96,98,100,102,104,106,108,110Zr; compiled experimental data for levels, J, π, 0+ states, two-nucleon and α transfer strengths to the first excited 0+ states.

doi: 10.1103/PhysRevC.102.054333
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2019GA30      Phys.Rev. C 100, 044315 (2019)

J.E.Garcia-Ramos, K.Heyde

Quest of shape coexistence in Zr isotopes

NUCLEAR STRUCTURE 94,96,98,100,102,104,106,108,110Zr; calculated positive-parity levels, J, B(E2), mean-square charge radii, ρ2(E0) for excited 0+ levels, S(2n), absolute energy of the lowest unperturbed regular and intruder first 0+ levels, energies of the two lowest lying regular levels and the lowest-lying intruder levels for J=0+, 2+, 3+, 4+, 5+, 6+ and 8+, B(E2) for levels in yrast bands and non-yrast intraband transitions, mean-field energy surfaces for 98,100,102Zr, intrinsic quadrupole moment, β and γ deformation parameters for first three 0+ states. Interacting boson model with configuration mixing (IBM-CM). Comparison with experimental data. Discussed shape coexistence, and other models such as large-scale shell-model side (LSSM), Monte-Carlo shell model (MCSM), and various mean field methods. 90,92,94,96,98,100,102,104,106,108,110Zr; systematics of experimental positive-parity levels, J, B(E2), spherical and deformed shapes up to 3 MeV excitation. Z=38-42, N=52-68; systematics of experimental S(2n) and difference in charge radii <r2> relative to those of N=50 nuclei.

doi: 10.1103/PhysRevC.100.044315
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2019WR01      Eur.Phys.J. A 55, 130 (2019)

K.Wrzosek-Lipska, K.Rezynkina, N.Bree, M.Zielinska, L.P.Gaffney, A.Petts, A.Andreyev, B.Bastin, M.Bender, A.Blazhev, B.Bruyneel, P.A.Butler, M.P.Carpenter, J.Cederkall, E.Clement, T.E.Cocolios, A.N.Deacon, J.Diriken, A.Ekstrom, C.Fitzpatrick, L.M.Fraile, Ch.Fransen, S.J.Freeman, J.E.Garcia-Ramos, K.Geibel, R.Gernhauser, T.Grahn, M.Guttormsen, B.Hadinia, K.Hadynska-Klek, M.Hass, P.-H.Heenen, R.-D.Herzberg, H.Hess, K.Heyde, M.Huyse, O.Ivanov, D.G.Jenkins, R.Julin, N.Kesteloot, Th.Kroll, R.Krucken, A.C.Larsen, R.Lutter, P.Marley, P.J.Napiorkowski, R.Orlandi, R.D.Page, J.Pakarinen, N.Patronis, P.J.Peura, E.Piselli, L.Prochniak, P.Rahkila, E.Rapisarda, P.Reiter, A.P.Robinson, M.Scheck, S.Siem, K.Singh Chakkal, J.F.Smith, J.Srebrny, I.Stefanescu, G.M.Tveten, P.Van Duppen, J.Van de Walle, D.Voulot, N.Warr, A.Wiens, J.L.Wood

Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of 182Hg, 184Hg, 186Hg and 188Hg

NUCLEAR REACTIONS 112Cd(182Hg, 182Hg'), E=519 MeV; 120Sn, 107Ag, 112Cd(184Hg, 184Hg'), E=524 MeV; 120Sn, 107Ag, 114Cd(186Hg, 186Hg'), E=530 MeV; 120Sn, 107Ag, 114Cd(188Hg, 188Hg'), E=536 MeV; measured reaction products, Eγ, Iγ, X-rays. 182,184,186,188Hg; deduced γ-ray energies, J, π, transition E2 and M1 reduced matrix elements, branching ratios, B(E2). Comparison with theoretical calculations, GOSIA analysis. The Miniball set-up, REX postaccelerator.

doi: 10.1140/epja/i2019-12815-2
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2017AL34      Phys.Rev. C 96, 044325 (2017)

N.A.Althubiti, D.Atanasov, K.Blaum, T.E.Cocolios, T.Day Goodacre, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, S.George, F.Herfurth, K.Heyde, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, D.Neidherr, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber, for the ISOLTRAP Collaboration

Spectroscopy of the long-lived excited state in the neutron-deficient nuclides 195, 197, 199Po by precision mass measurements

ATOMIC MASSES 195,195m,196,197,197m,199m,203,208Po; measured cyclotron frequency ratios, mass excesses using ISOLTRAP Penning-trap mass spectrometer at ISOLDE-CERN. The Po isotopes produced in U(p, X), E=1.4 GeV using RILIS and high-resolution mass spectrometer. 191m,193mPb, 195m,197mPo, 199m,201mRn, 203m,205mRa; deduced level energies of 13/2+ isomers in odd-A polonium isotopes from mass measurements, and other isomers from α decay. Comparison with evaluated data in AME-2016.

RADIOACTIVITY 195,195m,197,197m,199mPo(α)[from U(p, X), E=1.4 GeV using RILIS and high-resolution mass spectrometer at ISOLDE-CERN]; measured Eα, Iα.

doi: 10.1103/PhysRevC.96.044325
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2017SC11      Phys.Rev. C 96, 014302 (2017)

T.Schmidt, K.L.G.Heyde, A.Blazhev, J.Jolie

Shell-model-based deformation analysis of light cadmium isotopes

NUCLEAR STRUCTURE 98,100,102,104,106,108Cd; calculated levels, J, π, B(E2) using large-scale shell model with the ANTOINE code; deduced deformation parameters β and γ from rotational invariants. Comparison with available experimental data.

doi: 10.1103/PhysRevC.96.014302
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2016GR15      Phys.Rev. C 94, 044327 (2016)

T.Grahn, S.Stolze, D.T.Joss, R.D.Page, B.Saygi, D.O'Donnell, M.Akmali, K.Andgren, L.Bianco, D.M.Cullen, A.Dewald, P.T.Greenlees, K.Heyde, H.Iwasaki, U.Jakobsson, P.Jones, D.S.Judson, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, N.Lumley, P.J.R.Mason, O.Moller, K.Nomura, M.Nyman, A.Petts, P.Peura, N.Pietralla, Th.Pissulla, P.Rahkila, P.J.Sapple, J.Saren, C.Scholey, J.Simpson, J.Sorri, P.D.Stevenson, J.Uusitalo, H.V.Watkins, J.L.Wood

Excited states and reduced transition probabilities in 168Os

NUCLEAR REACTIONS 92Mo(78Kr, 2p), E=335, 345, 348 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin, level half-lives by recoil-distance method using a plunger device, RITU separator, GREAT spectrometer, JUROGAM array at Jyvaskyla accelerator facility. 168Os; deduced high-spin levels, J, π, bands, B(E2), B(E1), transition quadrupole and dipole moments. Comparisons with interacting boson model (IBM-2) calculations based on the SkM* energy-density functional. Systematics of ground bands, and excited positive-parity level energies up to 8+ in 168,170,172,174,176,178,180,182,184Os.

doi: 10.1103/PhysRevC.94.044327
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2016WO02      J.Phys.(London) G43, 020402 (2016)

J.L.Wood, K.Heyde

A focus on shape coexistence in nuclei

NUCLEAR STRUCTURE 16O, 40Ca, 32Mg, 42Ca, 43Sc, 72Se, 112,114,116,118Sn; analyzed available data; deduced shape coexistence regions.

doi: 10.1088/0954-3899/43/2/020402
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2015GA29      Phys.Rev. C 92, 034309 (2015)

J.E.Garcia-Ramos, K.Heyde

Nuclear shape coexistence in Po isotopes: An interacting boson model study

NUCLEAR STRUCTURE 190,192,194,196,198,200,202,204,206,208,210Po; calculated levels, J, π, IBM-CM Hamiltonians, B(E2)¬Ěs, electric quadrupole moments, nuclear radii and isotopic shifts, quadrupole shape invariants, wave functions, and deformations. Interacting boson model with configuration mixing (IBM-CM), by fixing the parameters of the Hamiltonians by a least-squares fit to experimental level energies and absolute B(E2) values. Comparison with experimental data.

doi: 10.1103/PhysRevC.92.034309
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2015KE06      Phys.Rev. C 92, 054301 (2015)

N.Kesteloot, B.Bastin, L.P.Gaffney, K.Wrzosek-Lipska, K.Auranen, C.Bauer, M.Bender, V.Bildstein, A.Blazhev, S.Bonig, N.Bree, E.Clement, T.E.Cocolios, A.Damyanova, I.Darby, H.De Witte, D.DiJulio, J.Diriken, C.Fransen, J.E.Garcia-Ramos, R.Gernhauser, T.Grahn, P.-H.Heenen, H.Hess, K.Heyde, M.Huyse, J.Iwanicki, U.Jakobsson, J.Konki, T.Kroll, B.Laurent, N.Lecesne, R.Lutter, J.Pakarinen, P.Peura, E.Piselli, L.Prochniak, P.Rahkila, E.Rapisarda, P.Reiter, M.Scheck, M.Seidlitz, M.Sferrazza, B.Siebeck, M.Sjodin, H.Tornqvist, E.Traykov, J.Van De Walle, P.Van Duppen, M.Vermeulen, D.Voulot, N.Warr, F.Wenander, K.Wimmer, M.Zielinska

Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes

NUCLEAR REACTIONS 104Pd(196Po, 196Po'), (200Po, 200Po'), (202Po, 202Po'), 94Mo(198Po, 198Po'), (202Po, 202Po'), E=2.85 MeV/nucleon, [secondary Po beams from U(p, X), E=1.4 GeV at REX-ISOLDE-CERN facility]; measured Eγ, Iγ, γγ-coin, (Po x ray)γ-coin, (scattered particle)γ-coin, (particle)γ(t), angular distribution of scattered particles, Coulomb excitation yields for excited states in beams and targets during laser-on and laser-off using double-sided silicon-strip detectors (DSSSDs) for particles and Miniball array for γ rays. 196,198,200,202Po; deduced levels, J, π, E2 matrix elements, B(E2), deformation parameters, transition quadrupole moments. 94Mo, 104Pd; deduced levels, Coulomb excitation yields. GOSIA analysis of Coulomb excitation yields. Comparison with predictions of beyond-mean-field (BMF) model, interacting boson model (IBM), general Bohr Hamiltonian (GBH) model, phenomenological two-level mixing model, and with previous measurement of mean-square charge radii.

doi: 10.1103/PhysRevC.92.054301
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2014BR05      Phys.Rev.Lett. 112, 162701 (2014)

N.Bree, K.Wrzosek-Lipska, A.Petts, A.Andreyev, B.Bastin, M.Bender, A.Blazhev, B.Bruyneel, P.A.Butler, J.Butterworth, M.P.Carpenter, J.Cederkall, E.Clement, T.E.Cocolios, A.Deacon, J.Diriken, A.Ekstrom, C.Fitzpatrick, L.M.Fraile, Ch.Fransen, S.J.Freeman, L.P.Gaffney, J.E.Garcia-Ramos, K.Geibel, R.Gernhauser, T.Grahn, M.Guttormsen, B.Hadinia, K.Hadynska-Klek, M.Hass, P.-H.Heenen, R.-D.Herzberg, H.Hess, K.Heyde, M.Huyse, O.Ivanov, D.G.Jenkins, R.Julin, N.Kesteloot, Th.Kroll, R.Krucken, A.C.Larsen, R.Lutter, P.Marley, P.J.Napiorkowski, R.Orlandi, R.D.Page, J.Pakarinen, N.Patronis, P.J.Peura, E.Piselli, P.Rahkila, E.Rapisarda, P.Reiter, A.P.Robinson, M.Scheck, S.Siem, K.Singh Chakkal, J.F.Smith, J.Srebrny, I.Stefanescu, G.M.Tveten, P.Van Duppen, J.Van de Walle, D.Voulot, N.Warr, F.Wenander, A.Wiens, J.L.Wood, M.Zielinska

Shape Coexistence in the Neutron-Deficient Even-Even 182-188Hg Isotopes Studied via Coulomb Excitation

NUCLEAR REACTIONS 120Sn, 107Ag, 112,114Cd(182Hg, 182Hg'), (184Hg, 184Hg'), (186Hg, 186Hg'), (188Hg, 188Hg'), E=2.85 MeV/nucleon; measured reaction products, Eγ, Iγ. 182,184,186,188Hg; deduced energy levels, J, π, nuclear matrix elements, B(E2). Comparison with IBM calculations, experimental data.

doi: 10.1103/PhysRevLett.112.162701
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2014GA02      Phys.Rev. C 89, 014306 (2014)

J.E.Garcia-Ramos, K.Heyde

Nuclear shape coexistence: A study of the even-even Hg isotopes using the interacting boson model with configuration mixing

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192,194,196,198,200Hg; calculated levels, J, π, absolute and relative B(E2), quadrupole moments, quadrupole shape invariants, wave functions, isotopic shifts, rms charge radii, mean-field energy surfaces, α-decay hindrance factor. Interacting boson model with configuration mixing. Comparisons with experimental data

doi: 10.1103/PhysRevC.89.014306
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2014GA08      Phys.Rev. C 89, 034313 (2014)

J.E.Garcia-Ramos, K.Heyde, L.M.Robledo, R.Rodriguez-Guzman

Shape evolution and shape coexistence in Pt isotopes: Comparing interacting boson model configuration mixing and Gogny mean-field energy surfaces

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192Pt; calculated total energy curves as function of β2, energy surface contours in (β, γ) plane, energies of unperturbed regular and intruder IBM bandheads. Interacting boson model with configuration mixing, and Hartree-Fock-Bogolyubov calculations with Gogny-D1S interaction. Detailed comparison of the two methods.

doi: 10.1103/PhysRevC.89.034313
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2013DI01      Phys.Rev. C 87, 017301 (2013)

D.D.DiJulio, J.Cederkall, C.Fahlander, A.Ekstrom, M.Hjorth-Jensen, M.Albers, V.Bildstein, A.Blazhev, I.Darby, T.Davinson, H.De Witte, J.Diriken, Ch.Fransen, K.Geibel, R.Gernhauser, A.Gorgen, H.Hess, K.Heyde, J.Iwanicki, R.Lutter, P.Reiter, M.Scheck, M.Seidlitz, S.Siem, J.Taprogge, G.M.Tveten, J.Van de Walle, D.Voulot, N.Warr, F.Wenander, K.Wimmer

Coulomb excitation of 107In

NUCLEAR REACTIONS 58Ni(107In, 107In'), (107Sn, 107Sn'), [107In and 107Sn secondary beams from LaCx(p, X), E=1.4 GeV primary reaction], E=2.87 MeV/nucleon; measured Eγ, Iγ, scattered particle spectra, (particle)γ-coin, B(E2) using REX-ISOLDE, MINIBALL Ge array facility at CERN. 107In; deduced levels, J, π, B(E2). GOSIA2 analysis for Coulomb excitation. 58Ni; measured Eγ, Iγ, used known B(E2) for first 2+ state for normalization of data for 107In. Comparison with experimental B(E2) values for 113,115In, and with large-scale shell model calculations. 107Sn; observed γ ray spectrum.

doi: 10.1103/PhysRevC.87.017301
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2013HE02      Phys.Scr. T152, 014006 (2013)

K.Heyde

Unveiling the many facets of the atomic nucleus: from Rutherford to exotic nuclei

doi: 10.1088/0031-8949/2013/T152/014006
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2012SM05      Phys.Rev. C 86, 034314 (2012)

N.A.Smirnova, K.Heyde, B.Bally, F.Nowacki, K.Sieja

Nuclear shell evolution and in-medium NN interaction

NUCLEAR STRUCTURE 16,18,20,22,28,36O, 24Ne, 26Mg, 34,42Si, 36,44S, 40,42,44,46,48Ca, 50Ti, 52Cr, 54Fe, 56Ni, 80,82,84,86,88,90Zr, 92Mo, 94Ru, 96Pd, 98Cd, 100Sn; calculated neutron and proton effective single-particle energies (ESPEs) based on an effective two-body shell-model interaction in sdpf shell-model space. Role of central and tensor terms in understanding evolution of the shell gaps at N=20 and N=28.

doi: 10.1103/PhysRevC.86.034314
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2011GA35      Phys.Rev. C 84, 014331 (2011)

J.E.Garcia-Ramos, V.Hellemans, K.Heyde

Platinum nuclei: Concealed configuration mixing and shape coexistence

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192,194Pt; calculated levels, J, π, unperturbed regular states, intruder states, g factors of first 2+ states, isotope shifts, rms charge radii. 174,180,186,192Pt; calculated unperturbed regular levels, intruder (2p-2h) levels, and levels with fully mixed configuration, B(E2), B(E2) ratios. 176,178,180Pt; calculated α-decay hindrance factors from the decay of 180,182,184Hg nuclei. Interacting boson model with configuration mixing (IBM-CM) calculations. Comparison with experimental data. 180,182,184,186,188,190,192,194,196,198,200,202,204,206,208Pb, 168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204Pt, 174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206Hg, 176Yb, 178Hf, 180W, 182Os; analyzed systematics of energy spectra of yrast and non-yrast levels.

doi: 10.1103/PhysRevC.84.014331
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2011HE21      Rev.Mod.Phys. 83, 1467 (2011)

K.Heyde, J.L.Wood

Shape coexistence in atomic nuclei

doi: 10.1103/RevModPhys.83.1467
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2011RA42      Phys.Rev. C 84, 064323 (2011)

E.Rapisarda, I.Stefanescu, D.L.Balabanski, B.Bastin, A.Blazhev, N.Bree, M.Danchev, B.Bruyneel, T.Davinson, P.Delahaye, J.Diriken, J.Eberth, G.Georgiev, D.Fedorov, V.N.Fedosseev, E.Fiori, S.Franchoo, Ch.Fransen, K.Geibel, K.Gladnishki, K.Hadynska, H.Hess, K.Heyde, M.Huyse, O.Ivanov, J.Iwanicki, J.Jolie, M.Kalkuehler, Th.Kroll, R.Krucken, U.Koster, G.Lo Bianco, R.Lozeva, B.A.Marsh, S.Nardelli, F.Nowacki, N.Patronis, P.Reiter, M.Seidlitz, K.Sieja, N.Smirnova, J.Srebrny, J.Van de Walle, P.Van Duppen, N.Warr, F.Wenander, K.Wimmer, K.Wrzosek, S.Zemlyanoi, M.Zielinska

Coulomb excitation of the 3- isomer in 70Cu

NUCLEAR REACTIONS 120Sn(70Cu, 70Cu'), [3- and 6- 70Cu beams from U(p, X), E=1.4 GeV], E=2.8 MeV/nucleon; measured Eγ, Iγ, γγ-coin, particle spectra of scattered projectile and recoiling target nuclei, particle-γ coin. 70Cu; deduced levels, J, π, transition matrix elements, B(E2), configurations. On-Line Isotope Mass Separator (CERN-ISOLDE) facility. Comparison with shell model calculations and with B(E2) values in 68,72Cu.

doi: 10.1103/PhysRevC.84.064323
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2010BI03      Phys.Lett. B 690, 15 (2010)

L.Bianco, R.D.Page, I.G.Darby, D.T.Joss, J.Simpson, J.S.Al-Khalili, A.J.Cannon, B.Cederwall, S.Eeckhaudt, S.Erturk, B.Gall, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, B.Hadinia, K.Heyde, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Labiche, M.Leino, A.-P.Leppanen, M.Nyman, D.O'Donnell, E.S.Paul, M.Petri, P.Peura, A.Puurunen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, P.J.Sapple, J.Saren, C.Scholey, N.A.Smirnova, A.N.Steer, P.D.Stevenson, E.B.Suckling, J.Thomson, J.Uusitalo, M.Venhart

Discovery of 157W and 161Os

NUCLEAR REACTIONS 106Cd(58Ni, 3n), E=290, 310 MeV; measured reaction products; deduced α spectra, α-branching, T1/2, fine structure, ground state J, π.

RADIOACTIVITY 161Os(α), 157W(β+); measured decay products; deduced T1/2, β-branching. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2010.04.056
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2010PA25      Phys.Rev. C 82, 027304 (2010)

D.Pauwels, J.L.Wood, K.Heyde, M.Huyse, R.Julin, P.Van Duppen

Pairing-excitation versus intruder states in 68Ni and 90Zr

NUCLEAR STRUCTURE 68Ni, 90Zr; analyzed proton and neutron intruder 2p-2h, 0+ states, configurations and monopole strengths of E0 transitions using shell-model and spectroscopic factors from relevant particle-transfer reactions.

doi: 10.1103/PhysRevC.82.027304
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2010SM02      Phys.Lett. B 686, 109 (2010)

N.A.Smirnova, B.Bally, K.Heyde, F.Nowacki, K.Sieja

Shell evolution and nuclear forces

NUCLEAR STRUCTURE 28,36O, 34,42Si, 36S, 40,48,52,54,60Ca; calculated systematics of neutron effective single-particle and proton single-hole state energies. 27O, 33Si, 35S, 39Ca; calculated binding energy. Shell model with spin-tensor decomposition and realistic interaction.

doi: 10.1016/j.physletb.2010.02.051
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2009AH01      Phys.Lett. B 679, 19 (2009); Erratum Phys.Lett. B 682, 490 (2010)

T.Ahn, L.Coquard, N.Pietralla, G.Rainovski, A.Costin, R.V.F.Janssens, C.J.Lister, M.Carpenter, S.Zhu, K.Heyde

Evolution of the one-phonon 21, ms mixed-symmetry state in N=80 isotones as a local measure for the proton-neutron quadrupole interaction

NUCLEAR REACTIONS 12C(134Xe, 134Xe'), E=435 MeV; measured Eγ, Iγ, γγ-coin using DSA technique and the Gammasphere array. 134Xe; deduced levels, J, π, δ, B(E2), B(M1), related properties. Systematics of N=80, 82 isotones discussed.

doi: 10.1016/j.physletb.2009.06.066
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2009DE11      Phys.Rev. C 79, 034305 (2009)

S.De Baerdemacker, K.Heyde, V.Hellemans

Spectral properties of a tractable collective Hamiltonian

doi: 10.1103/PhysRevC.79.034305
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2009GA15      Nucl.Phys. A825, 39 (2009)

J.E.Garcia-Ramos, K.Heyde

The Pt isotopes: Comparing the Interacting Boson Model with configuration mixing and the extended consistent-Q formalism

NUCLEAR STRUCTURE 172,174,176,178,180,182,184,186,188,190,192,194Pt; calculated level energies, B(E2), quadrupole moments and effect of intruder states using interacting boson model. Comparison with previous results and data.

doi: 10.1016/j.nuclphysa.2009.04.003
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2009HE04      Nucl.Phys. A819, 11 (2009)

V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde

Criticality in the configuration-mixed interacting boson model:(2) Q^(x1)Q^(x1)-Q^(x2)Q^(x2) mixing

doi: 10.1016/j.nuclphysa.2009.01.002
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2009SC11      Phys.Rev.Lett. 103, 012501 (2009)

W.Schwerdtfeger, P.G.Thirolf, K.Wimmer, D.Habs, H.Mach, T.R.Rodriguez, V.Bildstein, J.L.Egido, L.M.Fraile, R.Gernhauser, R.Hertenberger, K.Heyde, P.Hoff, H.Hubel, U.Koster, T.Kroll, R.Krucken, R.Lutter, T.Morgan, P.Ring

Shape Coexistence Near Neutron Number N = 20: First Identification of the E0 Decay from the Deformed First Excited Jπ = 0+ State in 30Mg

RADIOACTIVITY 30Na(β-); measured Eγ, Iγ; deduced J, π, monopole strength, partial E0 lifetime. Comparison with beyond mean field calculations.

doi: 10.1103/PhysRevLett.103.012501
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2009VA01      Phys.Rev. C 79, 014309 (2009)

J.Van de Walle, F.Aksouh, T.Behrens, V.Bildstein, A.Blazhev, J.Cederkall, E.Clement, T.E.Cocolios, T.Davinson, P.Delahaye, J.Eberth, A.Ekstrom, D.V.Fedorov, V.N.Fedosseev, L.M.Fraile, S.Franchoo, R.Gernhauser, G.Georgiev, D.Habs, K.Heyde, G.Huber, M.Huyse, F.Ibrahim, O.Ivanov, J.Iwanicki, J.Jolie, O.Kester, U.Koster, T.Kroll, R.Krucken, M.Lauer, A.F.Lisetskiy, R.Lutter, B.A.Marsh, P.Mayet, O.Niedermaier, M.Pantea, R.Raabe, P.Reiter, M.Sawicka, H.Scheit, G.Schrieder, D.Schwalm, M.D.Seliverstov, T.Sieber, G.Sletten, N.Smirnova, M.Stanoiu, I.Stefanescu, J.-C.Thomas, J.J.Valiente-Dobon, P.Van Duppen, D.Verney, D.Voulot, N.Warr, D.Weisshaar, F.Wenander, B.H.Wolf, M.Zielinska

Low-energy Coulomb excitation of neutron-rich zinc isotopes

NUCLEAR REACTIONS 120Sn(74Zn, 74Zn'), E=2.87 MeV/nucleon; 120Sn(76Zn, 76Zn'), E=2.83 MeV/nucleon; 108Pd(78ZN, 78Zn'), E=2.87 MeV/nucleon; 108Pd(80Zn, 80Zn'), E=2.79 MeV/nucleon; measured Eγ, Iγ, charged particle spectra, (particle)-γ coin, measured half-lives of first 2+ state, B(E2). 74,76,78,80Zn, 80Ga, 80Rb, 108Pd, 120Sn; deduced levels. Fe, Ni, Zn, Ge, Se; systematics of B(E2) values. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.79.014309
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2009VA03      Phys.Rev. C 79, 024302 (2009)

K.Van Houcke, S.M.A.Rombouts, K.Heyde, Y.Alhassid

Microscopic calculation of symmetry projected nuclear level densities

NUCLEAR STRUCTURE 55,56,57Fe; calculated level densities as a function of angular momentum, moments of inertia and pair correlation energies as a function of excitation energy. 56Fe; calculated parity-projected level densities and total quantum Monte Carlo densities as a function of excitation energy. Quantum Monte Carlo microscopic calculation of symmetry projected level densities.

doi: 10.1103/PhysRevC.79.024302
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2008HE06      Phys.Rev. C 77, 064324 (2008)

V.Hellemans, S.De Baerdemacker, K.Heyde

Configuration mixing in the neutron-deficient 186-196Pb isotopes

NUCLEAR STRUCTURE 188,190,192,194,196Pb; calculated levels, J, π, B(E2), weights of the IBM wave function, quadrupole deformations, mixing strengths between 0p-0h, 2p-2h, 4p-4h levels. Comparison with experimental data.

doi: 10.1103/PhysRevC.77.064324
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2007BO01      Phys.Rev. C 75, 014316 (2007)

N.Boelaert, N.Smirnova, K.Heyde, J.Jolie

Shell model description of the low-lying states of the neutron deficient Cd isotopes

NUCLEAR STRUCTURE 98,100,102,104,106Cd; calculated levels, J, π, B(E2), possible mixed-symmetry states. Shell model, comparison with data.

doi: 10.1103/PhysRevC.75.014316
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2007BO17      Phys.Rev. C 75, 054311 (2007); Erratum Phys.Rev. C 77, 019901 (2008)

N.Boelaert, A.Dewald, C.Fransen, J.Jolie, A.Linnemann, B.Melon, O.Moller, N.Smirnova, K.Heyde

Low-spin electromagnetic transition probabilities in 102, 104Cd

NUCLEAR REACTIONS 92Mo(12C, 2n), E=41 MeV; 94Mo(12C, 2n), E=42 MeV; measured Eγ, Iγ and lifetimes for low lying states using recoil distance Doppler shift technique. Deduced B(E2).

doi: 10.1103/PhysRevC.75.054311
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2007DE09      Phys.Rev.Lett. 98, 112502 (2007)

H.De Witte, A.N.Andreyev, N.Barre, M.Bender, T.E.Cocolios, S.Dean, D.Fedorov, V.N.Fedoseyev, L.M.Fraile, S.Franchoo, V.Hellemans, P.H.Heenen, K.Heyde, G.Huber, M.Huyse, H.Jeppesen, U.Koster, P.Kunze, S.R.Lesher, B.A.Marsh, I.Mukha, B.Roussiere, J.Sauvage, M.Seliverstov, I.Stefanescu, E.Tengborn, K.Van de Vel, J.Van de Walle, P.Van Duppen, Yu.Volkov

Nuclear Charge Radii of Neutron-Deficient Lead Isotopes Beyond N = 104 Midshell Investigated by In-Source Laser Spectroscopy

ATOMIC PHYSICS 182,183,183m,184,185,185m,186,187,187m,188,189,189m,190Pb; measured isotope shifts; deduced charge radii.

doi: 10.1103/PhysRevLett.98.112502
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2007HE21      Acta Phys.Pol. B38, 1599 (2007)

V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde

Phase Transitions in the Configuration Mixed Interacting Boson Model: U(5)-O(6) Mixing


2007HE27      Nucl.Phys. A789, 164 (2007), Erratum Nucl.Phys. A801, 80 (2008)

V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde

Criticality in the configuration-mixed interacting boson model:(1) U(5)-Q(X) Q(X) mixing

doi: 10.1016/j.nuclphysa.2007.12.003
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2007PA05      Phys.Rev. C 75, 014302 (2007)

J.Pakarinen, V.Hellemans, R.Julin, S.Juutinen, K.Heyde, P.-H.Heenen, M.Bender, I.G.Darby, S.Eeckhaudt, T.Enqvist, T.Grahn, P.T.Greenlees, F.Johnston-Theasby, P.Jones, H.Kettunen, M.Leino, A.-P.Leppanen, P.Nieminen, M.Nyman, R.D.Page, P.M.Raddon, P.Rahkila, C.Scholey, J.Uusitalo, R.Wadsworth

Investigation of nuclear collectivity in the neutron mid-shell nucleus 186Pb

NUCLEAR REACTIONS 106Pd(83Kr, 3n), E=355 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 186Pb deduced levels, J, π, rotational and vibrational bands, deformation. Recoil-decay tagging, interacting boson model and mean-field model calculations.

doi: 10.1103/PhysRevC.75.014302
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2007ST03      Phys.Rev.Lett. 98, 122701 (2007)

I.Stefanescu, G.Georgiev, F.Ames, J.Aysto, D.L.Balabanski, G.Bollen, P.A.Butler, J.Cederkall, N.Champault, T.Davinson, A.De Maesschalck, P.Delahaye, J.Eberth, D.Fedorov, V.N.Fedosseev, L.M.Fraile, S.Franchoo, K.Gladnishki, D.Habs, K.Heyde, M.Huyse, O.Ivanov, J.Iwanicki, J.Jolie, B.Jonson, Th.Kroll, R.Krucken, O.Kester, U.Koster, A.Lagoyannis, L.Liljeby, G.Lo Bianco, B.A.Marsh, O.Niedermaier, T.Nilsson, M.Oinonen, G.Pascovici, P.Reiter, A.Saltarelli, H.Scheit, D.Schwalm, T.Sieber, N.Smirnova, J.Van De Walle, P.Van Duppen, S.Zemlyanoi, N.Warr, D.Weisshaar, F.Wenander

Coulomb Excitation of 68, 70Cu: First Use of Postaccelerated Isomeric Beams

NUCLEAR REACTIONS 120Sn(68Cu, 68Cu'), (70Cu, 70Cu'), E=2.83 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin following projectile Coulomb excitation. 68,70Cu deduced transitions B(E2). Isomeric beams, comparison with large-scale shell model calculations.

doi: 10.1103/PhysRevLett.98.122701
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2007VA20      Phys.Rev.Lett. 99, 142501 (2007)

J.Van de Walle, F.Aksouh, F.Ames, T.Behrens, V.Bildstein, A.Blazhev, J.Cederkall, E.Clement, T.E.Cocolios, T.Davinson, P.Delahaye, J.Eberth, A.Ekstrom, D.V.Fedorov, V.N.Fedosseev, L.M.Fraile, S.Franchoo, R.Gernhauser, G.Georgiev, D.Habs, K.Heyde, G.Huber, M.Huyse, F.Ibrahim, O.Ivanov, J.Iwanicki, J.Jolie, O.Kester, U.Koster, T.Kroll, R.Krucken, M.Lauer, A.F.Lisetskiy, R.Lutter, B.A.Marsh, P.Mayet, O.Niedermaier, T.Nilsson, M.Pantea, O.Perru, R.Raabe, P.Reiter, M.Sawicka, H.Scheit, G.Schrieder, D.Schwalm, M.D.Seliverstov, T.Sieber, G.Sletten, N.Smirnova, M.Stanoiu, I.Stefanescu, J.-C.Thomas, J.J.Valiente-Dobon, P.Van Duppen, D.Verney, D.Voulot, N.Warr, D.Weisshaar, F.Wenander, B.H.Wolf, M.Zielinska

Coulomb Excitation of Neutron-Rich Zn Isotopes: First Observation of the 2+1 State in 80Zn

NUCLEAR REACTIONS 108Pd, 120Sn(74Zn, 74Zn'), (76Zn, 76Zn'), (78Zn, 78Zn'), (80Zn, 80Zn'), E=2.79-2.87 MeV/nucleon; measured Eγ, Iγ. 74,76,78,80Zn deduced B(E2).

doi: 10.1103/PhysRevLett.99.142501
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2006DE13      Nucl.Phys. A769, 16 (2006)

S.De Baerdemacker, L.Fortunato, V.Hellemans, K.Heyde

Solution of the Bohr Hamiltonian for a periodic potential with minimum at γ=π/6

doi: 10.1016/j.nuclphysa.2006.01.016
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2006FO09      Phys.Rev. C 74, 014310 (2006)

L.Fortunato, S.De Baerdemacker, K.Heyde

Solution of the Bohr Hamiltonian for soft triaxial nuclei

NUCLEAR STRUCTURE 172,174,176,178,180,184,186,188,190,192Os; calculated band-head energies, deformation, related parameters. 188,192Os; calculated levels, J, π. Bohr-Mottelson model, comparison with data and previous calculations.

doi: 10.1103/PhysRevC.74.014310
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2006GE18      Int.J.Mod.Phys. E15, 1505 (2006)

G.Georgiev, I.Stefanescu, D.L.Balabanski, P.Butler, J.Cederkall, T.Davinson, P.Delahaye, V.N.Fedosseev, L.M.Fraile, S.Franchoo, K.Gladnishki, K.Heyde, M.Huyse, O.Ivanov, J.Iwanicki, Th.Kroll, U.Koster, A.Lagoyannis, G.Lo Bianco, A.De Maesschalck, A.Saltarelli, T.Sieber, N.Smirnov, P.Van Duppen, N.Warr, F.Wenander, J.van de Walle, and the REX-ISOLDE and MINIBALL Collaborations

First use of post-accelerated isomeric beams for Coulomb excitations studies of odd-odd nuclei around N=40

NUCLEAR REACTIONS 120Sn(68Cu, 68Cu'), (70Cu, 70Cu'), E=2.86 MeV/nucleon; measured Eγ, Iγ, (particle)γ-coin following projectile Coulomb excitation. 68,70Cu deduced transitions B(E2). Isomeric beams.

doi: 10.1142/S0218301306005095
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2006NE06      Phys.Rev.Lett. 97, 062502 (2006)

A.Negret, T.Adachi, B.R.Barrett, C.Baumer, A.M.van den Berg, G.P.A.Berg, P.von Brentano, D.Frekers, D.De Frenne, H.Fujita, K.Fujita, Y.Fujita, E.-W.Grewe, P.Haefner, M.N.Harakeh, K.Hatanaka, K.Heyde, M.Hunyadi, E.Jacobs, Y.Kalmykov, A.Korff, K.Nakanishi, P.Navratil, P.von Neumann-Cosel, L.Popescu, S.Rakers, A.Richter, N.Ryezayeva, Y.Sakemi, A.Shevchenko, Y.Shimbara, Y.Shimizu, Y.Tameshige, A.Tamii, M.Uchida, J.Vary, H.J.Wortche, M.Yosoi, L.Zamick

Gamow-Teller Strengths in the A = 14 Multiplet: A Challenge to the Shell Model

NUCLEAR REACTIONS 14N(d, 2p), E=175 MeV; 14N(3He, t), E=420 MeV; measured excitation energy spectra, σ(E, θ); deduced Gamow-Teller strength distributions. Comparison with no-core shell model predictions.

doi: 10.1103/PhysRevLett.97.062502
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2005FO02      Acta Phys.Pol. B36, 1351 (2005)

R.Fossion, V.Hellemans, S.De Baerdemacker, K.Heyde

Shape coexistence in the lead isotopes using algebraic models: description of spectroscopic and ground-state related properties

NUCLEAR STRUCTURE 186,188,190,192,194,196Pb; calculated levels, J, π, two-neutron separation energies. Interacting boson model, three-configuration mixing.


2005FO16      Eur.Phys.J. A 25, Supplement 1, 439 (2005)

L.Fortunato, S.De Baerdemacker, K.Heyde

Soft triaxial rotor in the vicinity of γ = π/6 and its extensions

doi: 10.1140/epjad/i2005-06-018-0
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2005GA58      Eur.Phys.J. A 26, 221 (2005)

J.E.Garcia-Ramos, K.Heyde, R.Fossion, V.Hellemans, S.De Baerdemacker

A theoretical description of energy spectra and two-neutron separation energies for neutron-rich zirconium isotopes

NUCLEAR STRUCTURE 94,96,98,100,102,104Zr; calculated level energies, B(E2), two-neutron separation energies. Interacting boson model.

doi: 10.1140/epja/i2005-10176-1
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2005HE09      Phys.Rev. C 71, 034308 (2005)

V.Hellemans, R.Fossion, S.De Baerdemacker, K.Heyde

Configuration mixing in 188Pb: Band structure and electromagnetic properties

NUCLEAR STRUCTURE 188Pb; calculated rotational bands level energies, J, π, B(E2), monopole transition strengths, quadrupole moments, deformation, configuration mixing features. Interacting boson model, collective rotational model, comparisons with data.

doi: 10.1103/PhysRevC.71.034308
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2005JA07      Phys.Rev. C 71, 034604 (2005)

N.Jachowicz, K.Vantournhout, J.Ryckebusch, K.Heyde

Spin-dependent neutrino-induced nucleon knockout

NUCLEAR REACTIONS 16O, 208Pb(ν, ν'n), (ν, ν'p), E=0-500 MeV; calculated σ(E, θ), polarization asymmetries.

doi: 10.1103/PhysRevC.71.034604
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2005JA16      Nucl.Phys. A758, 51c (2005)

N.Jachowicz, K.Vantournhout, K.Heyde, J.Ryckebusch

Detecting supernova neutrinos using neutrino-nucleus scattering reactions

NUCLEAR REACTIONS 208Pb(ν, X), E=25, 50, 75, 100 MeV; calculated nucleon knock-out σ(θ), polarization dependence.

doi: 10.1016/j.nuclphysa.2005.05.014
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2005PA42      Phys.Rev. C 72, 011304 (2005)

J.Pakarinen, I.G.Darby, S.Eeckhaudt, T.Enqvist, T.Grahn, P.T.Greenlees, V.Hellemans, K.Heyde, F.Johnston-Theasby, P.Jones, R.Julin, S.Juutinen, H.Kettunen, M.Leino, A.-P.Leppanen, P.Nieminen, M.Nyman, R.D.Page, P.M.Raddon, P.Rahkila, C.Scholey, J.Uusitalo, R.Wadsworth

Evidence for oblate structure in 186Pb

NUCLEAR REACTIONS 106Pd(83Kr, 3n), E=355 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 186Pb deduced levels, J, π, oblate deformation. Jurogam array, recoil-decay tagging, interacting boson model calculations.

doi: 10.1103/PhysRevC.72.011304
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2005VA19      Phys.Rev. C 71, 054307 (2005)

J.Van Roosbroeck, H.De Witte, M.Gorska, M.Huyse, K.Kruglov, D.Pauwels, J.-Ch.Thomas, K.Van de Vel, P.Van Duppen, S.Franchoo, J.Cederkall, V.N.Fedoseyev, H.Fynbo, U.Georg, O.Jonsson, U.Koster, L.Weissman, W.F.Mueller, V.I.Mishin, D.Fedorov, A.De Maesschalck, N.A.Smirnova, K.Heyde

Evolution of the nuclear structure approaching 78Ni: β decay of 74-78Cu

RADIOACTIVITY 74,76,78Cu(β-); 78Cu(β-n) [from 238U(n, F), (p, F)]; measured Eγ, Iγ, βγ-coin, T1/2. 74,76,77,78Zn deduced levels, J, π, configurations. Mass separator, comparisons with model predictions.

doi: 10.1103/PhysRevC.71.054307
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2004AN07      Phys.Rev. C 69, 054308 (2004)

A.N.Andreyev, D.Ackermann, F.P.Hessberger, K.Heyde, S.Hofmann, M.Huyse, D.Karlgren, I.Kojouharov, B.Kindler, B.Lommel, G.Munzenberg, R D.Page, K.Van de Vel, P.Van Duppen, W.B.Walters, R.Wyss

Shape-changing particle decays of 185Bi and structure of the lightest odd-mass Bi isotopes

RADIOACTIVITY 185Bi(p), (α) [from 93Nb(95Mo, 3n)]; measured Ep, Eα, T1/2, branching ratios. 185Bi deduced levels, configurations, deformation. 184Pb, 181Tl, 181Hg(α) [from 185Bi decay]; analyzed α-spectra; deduced branching ratios.

NUCLEAR REACTIONS 93Nb(95Mo, 3n), E=438 MeV; measured particle spectra from residual nucleus decay; deduced approximate σ.

NUCLEAR STRUCTURE 185,187,189,191,193,195Bi; calculated level energies, potential energy surfaces.

doi: 10.1103/PhysRevC.69.054308
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2004HE12      Phys.Rev. C 69, 054304 (2004)

K.Heyde, J.Jolie, R.Fossion, S.De Baerdemacker, V.Hellemans

Phase transitions versus shape coexistence

NUCLEAR STRUCTURE 110Ru, 114Cd, 118Te, 122Ba, 182,184,186,188,190,192,194,196,198,200,202,204,206Pb; analyzed levels, J, π, B(E2), phase transition and shape coexistence features.

doi: 10.1103/PhysRevC.69.054304
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2004JA12      Phys.Rev.Lett. 93, 082501 (2004)

N.Jachowicz, K.Vantournhout, J.Ryckebusch, K.Heyde

Identifying Neutrinos and Antineutrinos in Neutral-Current Scattering Reactions

NUCLEAR REACTIONS 16O, 208Pb(ν, nX), (ν, pX), E=50-500 MeV; calculated induced polarization; deduced asymmetries between neutrino-induced and antineutrino-induced processes.

doi: 10.1103/PhysRevLett.93.082501
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2004SM03      Phys.Rev. C 69, 044306 (2004)

N.A.Smirnova, A.De Maesschalck, A.Van Dyck, K.Heyde

Shell-model description of monopole shift in neutron-rich Cu

NUCLEAR STRUCTURE 57,59,61,63,65,67,69,71,73,75,77Cu; calculated level energies, spectroscopic factors, monopole shift. Shell model, comparison with data.

doi: 10.1103/PhysRevC.69.044306
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2004VA07      Phys.Rev.Lett. 92, 112501 (2004)

J.Van Roosbroeck, C.Guenaut, G.Audi, D.Beck, K.Blaum, G.Bollen, J.Cederkall, P.Delahaye, A.De Maesschalck, H.De Witte, D.Fedorov, V.N.Fedoseyev, S.Franchoo, H.O.U.Fynbo, M.Gorska, F.Herfurth, K.Heyde, M.Huyse, A.Kellerbauer, H.-J.Kluge, U.Koster, K.Kruglov, D.Lunney, V.I.Mishin, W.F.Mueller, Sz.Nagy, S.Schwarz, L.Schweikhard, N.A.Smirnova, K.Van de Vel, P.Van Duppen, A.Van Dyck, W.B.Walters, L.Weissman, C.Yazidjian

Unambiguous Identification of Three β-Decaying Isomers in 70Cu

RADIOACTIVITY 70Ni(β-); 70mCu(β-), (IT) [from U(p, F) and subsequent decay]; measured Eγ, Iγ, T1/2; deduced log ft. 70Cu deduced levels J, π, configurations. Large scale shell model calculations.

ATOMIC MASSES 70mCu; measured isomeric states mass excesses. Penning trap.

doi: 10.1103/PhysRevLett.92.112501
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2004VA08      Phys.Rev. C 69, 034313 (2004)

J.Van Roosbroeck, H.De Witte, M.Gorska, M.Huyse, K.Kruglov, K.Van de Vel, P.Van Duppen, S.Franchoo, J.Cederkall, V.N.Fedoseyev, H.Fynbo, U.Georg, O.Jonsson, U.Koster, L.Weissman, W.F.Mueller, V.I.Mishin, D.Fedorov, W.B.Walters, N.A.Smirnova, A.Van Dyck, A.De Maesschalck, K.Heyde, and the IS365 and ISOLDE Collaborations

Coupling a proton and a neutron to the semidoubly magic nucleus 68Ni: A study of 70Cu via the β decay of 70Ni and 70Cu

RADIOACTIVITY 70Ni, 70Cu(β-); measured Eγ, Iγ, βγ-coin; deduced log ft. 70Cu, 70Zn levels deduced β-branching ratios. 70Cu deduced isomeric states J, π, T1/2. In-source laser spectroscopy, shell model analysis.

doi: 10.1103/PhysRevC.69.034313
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2003AN26      Eur.Phys.J. A 18, 39 (2003)

A.N.Andreyev, D.Ackermann, S.Antalic, H.J.Boardman, P.Cagarda, J.Gerl, F.P.Hessberger, S.Hofmann, M.Huyse, D.Karlgren, A.Keenan, H.Kettunen, A.Kleinbohl, B.Kindler, I.Kojouharov, A.Lavrentiev, C.D.O'Leary, M.Leino, B.Lommel, M.Matos, C.J.Moore, G.Munzenberg, R.D.Page, S.Reshitko, S.Saro, H.Schaffner, C.Schlegel, M.J.Taylor, K.Van de Vel, P.Van Duppen, L.Weissman, K.Heyde

α-decay spectroscopy of light odd-odd Bi isotopes - I: 188, 190Bi nuclei

RADIOACTIVITY 188,190Bi(α) [from 142Nd(50Cr, 3np), (52Cr, 3np), (52Cr, 5np)]; measured Eα, Eγ, (X-ray)α-, γα-coin, T1/2 following α-decay of ground and isomeric states. 184,186Tl deduced levels, J, π, configurations.

doi: 10.1140/epja/i2003-10050-2
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2003AN27      Eur.Phys.J. A 18, 55 (2003)

A.N.Andreyev, D.Ackermann, F.P.Hessberger, S.Hofmann, M.Huyse, I.Kojouharov, B.Kindler, B.Lommel, G.Munzenberg, R.D.Page, K.Van de Vel, P.Van Duppen, K.Heyde

α-decay spectroscopy of light odd-odd Bi isotopes - II: 186Bi and the new nuclide 184Bi

RADIOACTIVITY 184,186Bi(α) [from 93Nb(94Mo, 3n), (95Mo, 2n)]; measured Eα, Eγ, αγ-coin, T1/2. 180Tl(α) [from 184Bi decay]; measured α-branching ratio.

doi: 10.1140/epja/i2003-10051-1
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2003AR07      Nucl.Phys. A720, 71 (2003)

S.Aroua, P.Navratil, L.Zamick, M.S.Fayache, B.R.Barrett, J.P.Vary, K.Heyde

Allowed Gamow-Teller excitations from the ground state of 14N

NUCLEAR REACTIONS 14N(d, 2p), E not given; calculated Gamow-Teller transition strengths to ground and excited states, role of two-particle spin-orbit and tensor forces.

NUCLEAR STRUCTURE 14C, 14N; calculated levels, J, π. Shell model, comparison with data.

doi: 10.1016/S0375-9474(03)00746-2
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2003FO02      Phys.Rev. C 67, 024306 (2003)

R.Fossion, K.Heyde, G.Thiamova, P.Van Isacker

Intruder bands and configuration mixing in lead isotopes

NUCLEAR STRUCTURE 186,188,190,192,194,196Pb; calculated levels, J, π, configurations. Interacting boson model, three-configuration mixing calculation, comparisons with data.

doi: 10.1103/PhysRevC.67.024306
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2003JA14      Phys.Rev. C 68, 055502 (2003)

N.Jachowicz, K.Heyde

Influence of supernova-neutrino spectra on the neutrino signal in a terrestrial detector

NUCLEAR REACTIONS 208Pb(ν, ν'), E=spectrum; calculated σ(E), sensitivity to incident neutrino spectrum.

doi: 10.1103/PhysRevC.68.055502
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2002FO02      Nucl.Phys. A697, 703 (2002)

R.Fossion, C.De Coster, J.E.Garcia-Ramos, T.Werner, K.Heyde

Nuclear Binding Energies: Global collective structure and local shell-model correlations

NUCLEAR STRUCTURE Z=50-82; analyzed binding energies, two-neutron separation energies; deduced possible shell, deformation, or configuration-mixing effects. Liquid drop model, shell model, interacting boson model.

doi: 10.1016/S0375-9474(01)01270-2
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2002FO04      Phys.Rev. C65, 044309 (2002)

R.Fossion, C.De Coster, J.E.Garcia-Ramos, K.Heyde

Proton-Neutron Quadrupole Interactions: An effective contribution to the pairing field

doi: 10.1103/PhysRevC.65.044309
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2002HE07      Eur.Phys.J. A 13, 401 (2002)

K.Heyde, R.Fossion, J.E.Garcia-Ramos, C.De Coster, R.F.Casten

Differences between Pairing and Zero-Range Effective Interactions for Nuclear Binding Energies

doi: 10.1007/s10050-002-8769-2
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2002JA03      Phys.Rev. C65, 025501 (2002)

N.Jachowicz, K.Heyde, J.Ryckebusch, S.Rombouts

Continuum Random Phase Approximation Approach in Charged-Current Neutrino-Nucleus Scattering

NUCLEAR REACTIONS 12C, 16O(μ-, ν), (ν, e), (ν, μ), E not given; calculated σ. 12C(ν, ν'), (ν, e), (ν-bar, e+), E=50 MeV; 12C(ν, μ-), E=spectrum; calculated σ(E, θ). Continuum RPA, comparisons with data.

doi: 10.1103/PhysRevC.65.025501
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2002JA13      Prog.Part.Nucl.Phys. 48, 39 (2002)

N.Jachowicz, K.Heyde

Supernova-Neutrino Detection and the 208Pb(ν, ν')208Pb* Cross Section

NUCLEAR REACTIONS 208Pb(ν, ν'), E=50 MeV; calculated σ(E). Continuum RPA approach.

doi: 10.1016/S0146-6410(02)00109-6
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2002JA18      Phys.Rev. C 66, 055501 (2002)

N.Jachowicz, K.Heyde, J.Ryckebusch

Cross sections for neutral-current neutrino scattering on 208Pb

NUCLEAR REACTIONS 208Pb(ν, ν'), E=50 MeV; calculated neutral-current σ(E, θ), multipole contributions. 208Pb(ν, ν'), E=10-120 MeV; calculated neutral-current σ. 208Pb(ν, ν'p), (ν, ν'n), E not given; calculate branching ratios. Continuum RPA approach.

doi: 10.1103/PhysRevC.66.055501
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2002VY03      Phys.Lett. 538B, 33 (2002)

K.Vyvey, A.M.Oros-Peusquens, G.Neyens, D.L.Balabanski, D.Borremans, S.Chmel, N.Coulier, R.Coussement, G.Georgiev, H.Hubel, N.Nenoff, D.Rossbach, S.Teughels, K.Heyde

Quadrupole Moments of the 11- Intruder Isomers in 194, 196Pb in the Particle-Core Coupling Model

NUCLEAR STRUCTURE 198,200,204,206,208,210Po, 194,196,200,202,204,206Pb; analyzed isomeric states quadrupole moments; deduced configurations.

doi: 10.1016/S0370-2693(02)01950-0
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2001AN07      Nucl.Phys. A682, 482c (2001)

A.N.Andreyev, M.Huyse, P.Van Duppen, L.Weissman, D.Ackermann, J.Gerl, F.P.Hessberger, S.Hofmann, A.Kleinbohl, G.Munzenberg, S.Reshitko, C.Schlegel, H.Schaffner, P.Cagarda, M.Matos, S.Saro, A.Keenan, C.J.Moore, C.D.O'Leary, R.D.Page, M.J.Taylor, H.Kettunen, M.Leino, A.Lavrentiev, R.Wyss, K.Heyde

The Discovery of a Prolate-Spherical Shape Triple of Spin 0+ States in the Atomic Nucleus 186Pb

RADIOACTIVITY 190Po(α) [from 142Nd(52Cr, 4n)]; measured Eα, Iα, (ce)α-coin; deduced reduced α-decay widths, hindrance factors. 186Po deduced levels, J, π, shape coexistence features.

doi: 10.1016/S0375-9474(00)00676-X
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2001GA33      Nucl.Phys. A688, 735 (2001)

J.E.Garcia-Ramos, C.De Coster, R.Fossion, K.Heyde

Two-Neutron Separation Energies, Binding Energies and Phase Transitions in the Interacting Boson Model

NUCLEAR STRUCTURE Sm, Gd, Ru, Pd, Os, Pt; calculated binding energies. 150,152,154,156,158,160,162Gd, 100,102,104,106,108,110,112Pd, 184,186,188,190,192,194,196Pt; calculated level energies, two-neutron separation energies. Interacting boson model, comparisons with data.

doi: 10.1016/S0375-9474(00)00592-3
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2001HE23      Nucl.Phys. A690, 3c (2001)

K.Heyde

From Shell-Model Correlations to Collective Modes of Motion

doi: 10.1016/S0375-9474(01)00926-5
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2001JA12      Nucl.Phys. A688, 593c (2001)

N.Jachowicz, K.Heyde, S.Rombouts

Many-Body Description of Neutrino-Nucleus Interactions

NUCLEAR REACTIONS 12C(ν, μ-)12N, E=150 MeV; calculated σ(θ). 12C, 16O(ν, ν'), E not given; calculated σ averaged over a Fermi-Dirac ν energy distribution and as function of stellar temperature. Continuum Random Phase Approximation method.

doi: 10.1016/S0375-9474(01)00799-0
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2001SC41      Nucl.Phys. A693, 533 (2001)

S.Schwarz, F.Ames, G.Audi, D.Beck, G.Bollen, C.De Coster, J.Dilling, O.Engels, R.Fossion, J.-E.Garcia Ramos, S.Henry, F.Herfurth, K.Heyde, A.Kellerbauer, H.-J.Kluge, A.Kohl, E.Lamour, D.Lunney, I.Martel, R.B.Moore, M.Oinonen, H.Raimbault-Hartmann, C.Scheidenberger, G.Sikler, J.Szerypo, C.Weber, and the ISOLDE Collaboration

Accurate Masses of Neutron-Deficient Nuclides Close to Z = 82

ATOMIC MASSES 179,180,181,182,183,184,185,185m,186,187,187m,188,189m,190,191,191m,192,193,193m,194,195,196,197,197m,200Hg, 196,198,204Pb, 197Bi, 198Po, 203At; measured masses. Penning trap.

doi: 10.1016/S0375-9474(01)00881-8
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2000AN14      Nature(London) 405, 430 (2000)

A.N.Andreyev, M.Huyse, P.Van Duppen, L.Weissman, D.Ackermann, J.Gerl, F.P.Hessberger, S.Hofmann, A.Kleinbohl, G.Munzenberg, S.Reshitko, C.Schlegel, H.Schaffner, P.Cagarda, M.Matos, S.Saro, A.Keenan, C.Moore, C.D.O'Leary, R.D.Page, M.Taylor, H.Kettunen, M.Leino, A.Lavrentiev, R.Wyss, K.Heyde

A Triplet of Differently Shaped Spin-Zero States in the Atomic Nucleus 186Pb

RADIOACTIVITY 190Po(α) [from 142Nd(52Cr, 4n)]; measured Eα, Iα, (ce)α-coin; deduced reduced α-decay widths. 186Pb deduced levels, J, π, spherical-oblate-prolate deformation triplet. Comparison with model predictions.

doi: 10.1038/35013012
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2000DE28      Phys.Rev. C61, 067306 (2000)

C.De Coster, B.Decroix, K.Heyde

Evidence for Proton Four-Particle-Four-Hole Intruder Excitations in Neutron Deficient Nuclei in the Pb Region

NUCLEAR STRUCTURE 184,186,188,190Pb; analyzed levels, J, π; deduced four-particle four-hole configuration.

doi: 10.1103/PhysRevC.61.067306
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2000DE44      Phys.Scr. T88, 33 (2000)

C.De Coster, B.Decroix, J.De Beule, K.Heyde

An Algebraic Approach to Shape Coexistence: New symmetries and applications

NUCLEAR STRUCTURE 192,194,196,198,200,202,204,206,208,210Po; calculated levels, J, π, configurations, shape coexistence properties. Extended IBM approach.

doi: 10.1238/Physica.Topical.088a00033
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2000HE23      Hyperfine Interactions 127, 65 (2000)

K.Heyde, J.De Beule, B.Decroix, C.De Coster

Shape coexistence in atomic nuclei and its spectroscopic fingerprints

NUCLEAR STRUCTURE Pt, Hg, Pb, Po; analyzed level energy systematics, shape coexistence features.

doi: 10.1023/A:1012698224101
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2000KA07      Phys.Rev. C61, 034307 (2000)

M.Kadi, P.E.Garrett, M.Yeh, S.W.Yates, T.Belgya, A.M.Oros-Peusquens, K.Heyde

Decay Properties of States Populated with the 207Pb(n, n'γ) Reaction and Weak Coupling in 207Pb

NUCLEAR REACTIONS 207Pb(n, n'γ), E=2.5-4.6 MeV; measured Eγ, Iγ(θ), γγ-coin, DSA; deduced γ-ray excitation functions. 207Pb deduced levels, J, π, configurations, T1/2, B(E1). Particle-core model.

doi: 10.1103/PhysRevC.61.034307
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1999BA45      Eur.Phys.J. A 5, 49 (1999)

J.C.Batchelder, K.S.Toth, C.R.Bingham, L.T.Brown, L.F.Conticchio, C.N.Davids, R.J.Irvine, D.Seweryniak, W.B.Walters, J.Wauters, E.F.Zganjar, J.L.Wood, C.De Coster, B.Decroix, K.Heyde

Behavior of Intruder Based States in Light Bi and Tl Isotopes: The study of 187Bi α Decay

RADIOACTIVITY 187Bi(α) [from 97Mo(92Mo, np)]; measured Eα, Iα, T1/2. 183Tl deduced levels, possible J, π. 187Bi deduced excited level. Fragment mass analyzer. Neutron intruder state systematics discussed.

doi: 10.1007/s100500050255
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1999DE13      J.Phys.(London) G25, 671 (1999)

C.De Coster, J.De Beule, B.Decroix, K.Heyde, A.M.Oros, P.Van Isacker

An Algebraic Approach to Shape Coexistence

doi: 10.1088/0954-3899/25/4/017
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1999DE15      J.Phys.(London) G25, 855 (1999)

B.Decroix, C.De Coster, K.Heyde, A.M.Oros, J.De Beule, P.Van Isacker

The Extended Proton-Neutron Interacting Boson Model and Possible Applications

NUCLEAR STRUCTURE 16O, 24Mg; calculated levels, J, π; deduced SU(4) symmetry features. Extended proton-neutron IBM.

doi: 10.1088/0954-3899/25/4/054
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1999DE16      Nucl.Phys. A651, 31 (1999)

C.De Coster, B.Decroix, K.Heyde, J.Jolie, H.Lehmann, J.L.Wood

Particle-Hole Excitations in the Interacting Boson Model (IV). The U(5)-SU(3) Coupling

NUCLEAR STRUCTURE 192,194,195,196,198,200,202Po; calculated levels, J, π. Extended IBM, U(5)-SU(3) coupling.

doi: 10.1016/S0375-9474(99)00124-4
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1999JA06      Phys.Rev. C59, 3246 (1999)

N.Jachowicz, S.Rombouts, K.Heyde, J.Ryckebusch

Cross Sections for Neutral-Current Neutrino-Nucleus Interactions: Applications for 12C and 16O

NUCLEAR REACTIONS 12C, 16O(ν, ν'), E=50 MeV; calculated σ(ω), multipole contributions. RPA approach.

doi: 10.1103/PhysRevC.59.3246
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1999OR01      Nucl.Phys. A645, 107 (1999)

A.M.Oros, K.Heyde, C.De Coster, B.Decroix, R.Wyss, B.R.Barrett, P.Navratil

Shape Coexistence in the Light Po Isotopes

NUCLEAR STRUCTURE 192,194,196,198,200,202,204,206,208,210Po; calculated levels, J, π, potential energy surfaces; deduced shape coexistence effects. Particle-core model, two-state mixing.

doi: 10.1016/S0375-9474(98)00602-2
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1999RO06      Phys.Rev.Lett. 82, 4155 (1999)

S.M.A.Rombouts, K.Heyde, N.Jachowicz

Quantum Monte Carlo Method for Fermions, Free of Discretization Errors

doi: 10.1103/PhysRevLett.82.4155
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1999WO07      Nucl.Phys. A651, 323 (1999)

J.L.Wood, E.F.Zganjar, C.De Coster, K.Heyde

Electric Monopole Transitions from Low Energy Excitations in Nuclei

NUCLEAR STRUCTURE A=12-238; compiled, analyzed electric monopole transition strengths; deduced role of deformation, shape coexistence.

doi: 10.1016/S0375-9474(99)00143-8
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1998DE18      Phys.Rev. C57, 2329 (1998)

B.Decroix, J.De Beule, C.De Coster, K.Heyde, A.M.Oros, P.Van Isacker

Particle-Hole Excitations in the Interacting Boson Models IBM-2 and IBM-3

doi: 10.1103/PhysRevC.57.2329
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1998DE30      Phys.Rev. C58, 232 (1998)

B.Decroix, C.De Coster, K.Heyde, A.M.Oros, J.De Beule

1+ Mixed Symmetry States and Dipole Transitions in the Extended Proton-Neutron Interacting Boson Model

doi: 10.1103/PhysRevC.58.232
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1998DE47      Phys.Lett. 439B, 237 (1998)

B.Decroix, J.De Beule, C.De Coster, K.Heyde

SU(4) Symmetry in the Extended Proton-Neutron Interacting Boson Model: Multiplets and symmetry breaking

NUCLEAR STRUCTURE 16O, 24Mg; calculated levels, J, π; deduced SU(4) symmetry related features. Extended interacting boson model.

doi: 10.1016/S0370-2693(98)01083-1
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1998OR01      Phys.Rev. C57, 990 (1998)

A.M.Oros, K.Heyde, C.De Coster, B.Decroix

Local Electric Dipole Strength in Heavy Nuclei

NUCLEAR STRUCTURE 116Sn; calculated single-particle energies, E1 strength distributions; deduced local dipole states. Two-group RPA model.

doi: 10.1103/PhysRevC.57.990
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1998RO01      Phys.Rev.Lett. 80, 885 (1998)

S.Rombouts, K.Heyde

Comment on ' Monte Carlo Computation of Pair Correlations in Excited Nuclei '

doi: 10.1103/PhysRevLett.80.885
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1998RO30      Phys.Rev. C58, 3295 (1998)

S.Rombouts, K.Heyde, N.Jachowicz

Thermodynamical Properties of a Mean-Field Plus Pairing Model and Applications for the Fe Nuclei

NUCLEAR STRUCTURE 56Fe; calculated thermodynamical properties; deduced pairing-related phase transition. Finite-temperature quantum Monte Carlo method.

doi: 10.1103/PhysRevC.58.3295
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1998WH05      Nucl.Phys. A640, 322 (1998)

G.White, J.Rikovska, N.J.Stone, J.Copnell, I.S.Towner, A.M.Oros, K.Heyde, B.Fogelberg, L.Jacobsson, F.Gustavsson

Magnetic Dipole Moments Near 132Sn: Measurement on isomeric 11/2- states in odd-A 131Te and 133Te by NMR/ON

RADIOACTIVITY 131,133Te(β-) [from 233U(n, F)]; measured Eγ, Iγ(θ, T, H), NMR on oriented nuclei. 131,133Te deduced isomeric states g, μ. Shell model, core polarization, mesonic exchange currents, particle-core coupling model.

doi: 10.1016/S0375-9474(98)00461-8
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1997DE28      Nucl.Phys. A621, 802 (1997)

C.De Coster, B.Decroix, K.Heyde, J.L.Wood, J.Jolie, H.Lehmann

Particle-Hole Excitations in the Interacting Boson Model (III): The O(6)-SU(3) coupling

NUCLEAR STRUCTURE 180,182,184,186Os, 184,186,188,190Po, 180,178W, 190,192,182,184Pt, 196,194,188,186Pb, 192,190Rn, 196Th; calculated levels. 182,184,186,188,190,192,194,196,198Pt; calculated g factors. Extended interacting boson model.

doi: 10.1016/S0375-9474(97)00195-4
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1997HE04      Phys.Lett. 392B, 7 (1997)

K.Heyde, C.De Coster

Electric Dipole Transitions Near the Z = 50 and N = 82 Closed Shells

NUCLEAR STRUCTURE Z=50; N=82; analyzed E1 transition related features; deduced 1p-1h admixtures role at the tail of GDR.

doi: 10.1016/S0370-2693(96)01611-5
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1997LE16      Nucl.Phys. A621, 767 (1997)

H.Lehmann, J.Jolie, C.De Coster, B.Decroix, K.Heyde, J.L.Wood

Particle-Hole Excitations in the Interacting Boson Model (II): The U(5)-O(6) coupling

NUCLEAR STRUCTURE 108,110,112,114Cd, 112,114,116,118Te, 114Cd, 122Ba; calculated levels, B(λ). Extended interacting boson model.

doi: 10.1016/S0375-9474(97)00196-6
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1997OR01      Nucl.Phys. A613, 209 (1997)

A.M.Oros, P.von Brentano, R.V.Jolos, L.Trache, G.Graw, G.Cata-Danil, B.D.Valnion, A.Gollwitzer, K.Heyde

New 0+ States in 146Sm from a (p, t) Experiment and the Particle-Core Coupling Model

NUCLEAR REACTIONS 148Sm(p, t), E=26 MeV; measured σ(θ). 146Sm deduced levels, J, π. Particle-core coupling calculations. Enriched targets.

doi: 10.1016/S0375-9474(96)00437-X
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1997RO11      Nucl.Phys. A621, 371c (1997)

S.Rombouts, K.Heyde

Calculation of Neutrino-Nucleus Scattering Cross-Sections Relevant for Supernova Processes

doi: 10.1016/S0375-9474(97)00273-X
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1997RY01      Nucl.Phys. A624, 581 (1997)

J.Ryckebusch, V.Van der Sluys, K.Heyde, H.Holvoet, W.Van Nespen, M.Waroquier, M.Vanderhaeghen

Electroinduced Two-Nucleon Knockout and Correlations in Nuclei

NUCLEAR REACTIONS 12C(e, e'2p), (e, e'np), E=700 MeV; 16O(e, e'2p), (e, e'np), E=1.2 GeV; calculated σ(θ), pn(θ), pp(θ); 12C(e, e'pX), (γ, pX), E ≈ 200 MeV; analyzed σ(θ) vs missing energy; deduced reaction mechanisms relative importance.

doi: 10.1016/S0375-9474(97)00385-0
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1997ST06      Phys.Rev.Lett. 78, 820 (1997)

N.J.Stone, D.Doran, M.Lindroos, J.Rikovska, M.Veskovic, G.White, D.A.Williams, B.Fogelberg, L.Jacobsson, I.S.Towner, K.Heyde

Magnetic Moments of Odd-A Sb Isotopes to 133Sb: Significant evidence for mesonic exchange current contributions and on core collective g factors

RADIOACTIVITY 129,131,133Sb(β-) [from 235U(n, F), E=thermal]; measured NMR, oriented nuclei; deduced μ, meson exchange effects role. Particle-core coupling model.

doi: 10.1103/PhysRevLett.78.820
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1997VA07      Phys.Rev. C55, 1982 (1997)

V.Van der Sluys, K.Heyde, J.Ryckebusch, M.Waroquier

Systematic Study of Coulomb Distortion Effects in Exclusive (e, e'p) Reactions

NUCLEAR REACTIONS 16O(e, e'p), E=455.8 MeV; 40Ca(e, e'p), E=460 MeV; 90Zr(e, e'p), E=346.5, 350.7 MeV; 208Pb(e, e'p), E=412.3 MeV; analyzed reduced σ vs missing momentum. 15N, 39K, 89Y, 207Tl levels deduced spectroscopic factors. CDWBA approach, systematic study of Coulomb distortion.

doi: 10.1103/PhysRevC.55.1982
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