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Search: Author = E.Hammaren

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2000HJ01      Eur.Phys.J. A 7, 201 (2000)

T.Hjelt, K.W.Schmid, E.Hammaren, A.Faessler

Unrestricted Symmetry-Projected Hartree-Fock-Bogoliubov Calculations for Some PF-Shell Nuclei

NUCLEAR STRUCTURE 46Ti, 50Cr, 62Zn; calculated levels, J, π, binding energy. Unrestricted HFB calculation, comparison with truncated shell model.

doi: 10.1007/s100500050382
Citations: PlumX Metrics


1998HA52      Eur.Phys.J. A 2, 371 (1998)

E.Hammaren, K.W.Schmid, A.Faessler

Unrestricted Symmetry-Projected Hartree-Fock-Bogoliubov Calculations for SD-Shell Nuclei

NUCLEAR STRUCTURE 24Mg, 28Si, 26,27Al; calculated levels, J, π. Symmetry-projected HFB calculations with unrestricted vacua, comparisons with complete shell-model diagonalizations.

doi: 10.1007/s100500050133
Citations: PlumX Metrics


1993SU02      Phys.Rev. C47, 757 (1993)

J.Suhonen, E.Hammaren

Massive Neutrinos and Right-Handed Weak Currents in Double Beta Decay

RADIOACTIVITY 76Ge(2β); analyzed T1/2 data; deduced effective right-handed coupling upper limit, two scenarios for massive neutrinos.

doi: 10.1103/PhysRevC.47.757
Citations: PlumX Metrics


1992HA16      Nucl.Phys. A541, 226 (1992)

E.Hammaren, P.Heikkinen, K.W.Schmid, A.Faessler

Microscopic and Phenomenological Analysis of the Alaga Rule for Dipole States

NUCLEAR STRUCTURE 156Gd, 164Dy; calculated B(M1), γ-branching ratio for dipole excitations. Microscopic approach. Alaga rule phenomenological analysis.

doi: 10.1016/0375-9474(92)90095-2
Citations: PlumX Metrics


1992PE11      Nucl.Phys. A549, 352 (1992)

A.Petrovici, E.Hammaren, K.W.Schmid, F.Grummer, A.Faessler

Shape Coexistence in the A ≈ 70 Region Including Neutron-Proton Interaction and Unnatural-Parity Correlations in the Mean Field

NUCLEAR STRUCTURE 72Ge, 72Kr; calculated levels. 68Ge; calculated levels, B(λ), spectroscopic quadrupole moments. Neutron-proton interaction, unnatural parity correlations, mean field approach.

doi: 10.1016/0375-9474(92)90084-W
Citations: PlumX Metrics


1987LI11      Nucl.Phys. A469, 348 (1987)

P.O.Lipas, P.Toivonen, E.Hammaren

IBA-1 Calculations of E2/M1 Mixing Ratios

NUCLEAR STRUCTURE 146,148,150,152Sm, 152,154,156Gd, 162Dy, 162,164,166,168Er, 172Yb, 190Os; calculated levels, δ(E2/M1). Interacting boson approximation.

doi: 10.1016/0375-9474(87)90115-1
Citations: PlumX Metrics


1986HA11      Phys.Lett. 171B, 347 (1986)

E.Hammaren, K.W.Schmid, A.Faessler, F.Grummer

Microscopic Prediction of the M1 Strength Distributions in Medium Heavy Nuclei

NUCLEAR STRUCTURE 128,130,132,134Ce, 126,128,130Ba; calculated B(M1); deduced branching state dependence.

doi: 10.1016/0370-2693(86)91418-8
Citations: PlumX Metrics


1986HA14      Nucl.Phys. A454, 301 (1986)

E.Hammaren, K.W.Schmid, F.Grummer, A.Faessler, B.Fladt

Microscopic Description of Even-Even Nuclei in the Mass A = 130 Region

NUCLEAR STRUCTURE 128,130,132,134Ce, 126,128,130Ba, 120,124,126Xe; calculated levels, yrast sequence, transition energies, B(E2). 124,126,128,130,132Ba; calculated two-quasiparticle contributions to ground band energies. 128Ba; calculated static, electric quadrupole moments vs spin. 126,130Ba; calculated g vs spin. Self-consistent HFB mean field, microscopic treatment.

doi: 10.1016/0375-9474(86)90271-X
Citations: PlumX Metrics


1986HA28      Nucl.Phys. A456, 317 (1986)

E.Hammaren, O.Hausser, H.R.Andrews, P.Taras, A.Larabee

136Xe(13C, 4nγ) Reaction Study of 145Nd

NUCLEAR REACTIONS 136Xe(13C, 4nγ), E=49-60 MeV; measured E(γ), I(γ)(E), I(γ)(θ), γγ-, energy-coin. 145Nd deduced levels, J, π. Pulsed beam, enriched solid 136Xe target, Ge(Li) detectors.

doi: 10.1016/0375-9474(86)90396-9
Citations: PlumX Metrics


1986PA14      J.Phys.(London) G12, 1047 (1986)

A.Passoja, J.Kantele, M.Luontama, R.Julin, E.Hammaren, P.O.Lipas, P.Toivonen

Electromagnetic Decay of 02+ and O3+ States in the N = 88-90 Nuclei of 150,152Sm

RADIOACTIVITY 152m,150mEu(EC), (β+), (β-) [from 150Sm(p, n), E=9.5 MeV; 151Eu(n, γ), E=thermal]; measured Iγ, Eγ, I(ce), I(ce)(X-ray)-coin. 150,152Sm deduced levels, J, π, B(λ), E0 strength parameter. Enriched targets, Ge(Li) detectors, magnetic plus Si-Li conversion electron spectrometer. Interacting boson model.

doi: 10.1088/0305-4616/12/10/013
Citations: PlumX Metrics


1986SC19      Nucl.Phys. A456, 437 (1986)

K.W.Schmid, F.Grummer, E.Hammaren, M.Kyotoku, A.Faessler

Alignment and Electromagnetic Properties of the Yrast Bands in 128Ba and 130Ce: An analysis of the VAMPIR wave functions

NUCLEAR STRUCTURE 128Ba, 130Ce; calculated levels, yrast sequence, occupation probabilities, g, B(E2), static hexadecapole, dynamic quadrupole moments. HFB, angular momentum, particle number projection before variation.

doi: 10.1016/0375-9474(86)90404-5
Citations: PlumX Metrics


1985HA34      Nucl.Phys. A437, 1 (1985)

E.Hammaren, K.W.Schmid, F.Grummer, A.Faessler, B.Fladt

Microscopic Description of Odd-Mass Nuclei in the Mass A = 130 Region

NUCLEAR REACTIONS 130,132,134,136Ba(d, p), E not given; calculated spectroscopic amplitudes. Microscopic model.

NUCLEAR STRUCTURE 127,129,131,133Ce, 125,127,129,131Ba, 123,125,127,129Xe, 127,129,131La, 123,125,127,129Cs, 121,123,125,127I; calculated levels, rotational parameters. 132,134,136Ba; calculated one-neutron pickup spectroscopic amplitudes. 130,132,134,136Ba; calculated one-proton stripping, one-proton pickup stripping spectroscopic amplitudes. Microscopic model.

doi: 10.1016/0375-9474(85)90225-8
Citations: PlumX Metrics


1985SC06      Nucl.Phys. A436, 417 (1985)

K.W.Schmid, F.Grummer, E.Hammaren, A.Faessler

VAMPIR Calculations for 128Ba and 130Ce: Two mechanisms of backbending

NUCLEAR STRUCTURE 128Ba, 130Ce; calculated yrast band, total binding energies, intrinsic pairing gap energy vs spin, quadrupole, hexadecapole moments, occupation numbers. HFB with spin, number projections before variation.

doi: 10.1016/0375-9474(85)90077-6
Citations: PlumX Metrics


1984KA12      Z.Phys. A316, 361 (1984)

R.Katajanheimo, R.Jaderholm, A.Siivola, T.Tuurnala, E.Hammaren, E.Liukkonen

Low-Lying Levels in the Nuclei 151Nd and 155Sm

NUCLEAR REACTIONS 150Nd, 154Sm(d, pγ), E=10 MeV; measured γγ-coin. 151Nd deduced levels, tentative J, π, γ-branching. 155Sm deduced levels, γ-branching. Axial particle-rotor model calculations.

doi: 10.1007/BF01439909
Citations: PlumX Metrics


1984KA35      Z.Phys. A319, 91 (1984)

R.Katajanheimo, H.Liljavirta, A.Siivola, E.Hammaren, E.Liukkonen

Low-Energy Rotational Bands in the Nucleus 155Eu

NUCLEAR REACTIONS 154Sm(3He, np), E=22, 27 MeV; measured Eγ, Iγ, γγ-coin. 155Eu deduced levels, J, π, γ-branching, rotational parameters. Particle-rotor model.

doi: 10.1007/BF01429772
Citations: PlumX Metrics


1984KR02      J.Phys.(London) G10, 571 (1984)

T.I.Kracikova, M.Finger, V.N.Pavlov, V.A.Deryuga, P.O.Lipas, E.Hammaren, P.Toivonen

Nuclear Orientation Study of the Decay of 146Eu

RADIOACTIVITY 146Eu(EC), (β+) [from Er(p, X), E=660 MeV]; measured γ(θ), oriented nuclei; deduced orientation coefficients. 146Sm deduced levels, J, π, δ, B(λ), X(E0/E2). Interacting boson approximation model.

doi: 10.1088/0305-4616/10/4/017
Citations: PlumX Metrics


1984KR09      J.Phys.(London) G10, 667 (1984)

T.I.Kracikova, M.Finger, J.Konicek, N.A.Lebedev, V.A.Deryuga, P.O.Lipas, E.Hammaren, P.Toivonen

Nuclear Orientation Study of the Decay of 148Eu

NUCLEAR STRUCTURE 148Sm; calculated levels, δ, B(E2), X(E0/E2), quasirotational band structure. Interacting boson model.

RADIOACTIVITY 148Eu(EC), (β+), (α) [from Er(p, X), E=660 MeV]; measured γ(θ), oriented nuclei. 148Sm deduced levels, J, π, δ, X(E0/E2). Interacting boson model.

doi: 10.1088/0305-4616/10/5/010
Citations: PlumX Metrics


1984KR14      J.Phys.(London) G10, 1115 (1984)

T.I.Kracikova, S.Davaa, M.Finger, M.I.Fominykh, W.D.Hamilton, P.O.Lipas, E.Hammaren, P.Toivonen

Nuclear Orientation Study of the Decay of 172Lu

RADIOACTIVITY 172Lu(EC) [from Ta(p, X)172Hf(EC-decay)]; measured Eγ, Iγ, γ(θ), oriented nuclei. 172Yb levels deduced J, π, γ-branching, δ, X(E0/E2), monopole transition density. Mass separated source implantation in Gd, Fe, 3He-4He dilution refrigerator, Ge(Li) detectors. Interacting boson model.

doi: 10.1088/0305-4616/10/8/016
Citations: PlumX Metrics


1984LI06      Phys.Lett. 139B, 10 (1984)

P.O.Lipas, E.Hammaren, P.Toivonen

IBA-1 Calculation of E2/M1 Mixing Ratios in 154Gd

NUCLEAR STRUCTURE 154Gd; calculated reduced (E2/M1) mixing ratio. Generalized interacting boson approximation.

doi: 10.1016/0370-2693(84)90023-6
Citations: PlumX Metrics


1984RA03      Nucl.Phys. A414, 269 (1984)

T.Ramsoy, J.Rekstad, A.Henriquez, F.Ingebretsen, M.Guttormsen, E.Hammaren, T.F.Thorsteinsen

Deep-Lying νh11/2 Hole States in 145Nd

NUCLEAR REACTIONS 146Nd(3He, α), E=26 MeV; measured σ(Eγ, θ), Eγ, Iγ, γα-coin. 145Nd deduced levels, γ-ray multiplicity, level density, spectroscopic strength. Enriched target, Ge(Li), NaI(Tl), Si detectors. Fermi gas model analysis.

doi: 10.1016/0375-9474(84)90644-4
Citations: PlumX Metrics


1984RE04      Nucl.Phys. A417, 376 (1984)

J.Rekstad, B.Nordmoen, A.Henriques, F.Ingebretsen, S.Messelt, T.F.Thorsteinsen, E.Hammaren

The (3He, α) Strength Functions in Rare-Earth Nuclei

NUCLEAR REACTIONS 156,157Gd, 171Yb(3He, α), E=26 MeV; measured σ(Eα, θ), αγ-coin. 155,156Gd, 170Yb levels deduced L, J, π, S. Enriched targets. DWBA calculations. Comparison to particle-plus-rotor model.

doi: 10.1016/0375-9474(84)90403-2
Citations: PlumX Metrics


1983LI06      Phys.Scr. 27, 8 (1983)

P.O.Lipas, J.Kumpulainen, E.Hammaren, T.Honkaranta, M.Finger, T.I.Kracikova, I.Prochazka, J.Ferencei

Study of Even Gd Nuclei by Decay of Oriented Tb, with Analysis by Simple Boson Models

NUCLEAR STRUCTURE 150,152,154,156,158,160Gd; calculated levels, B(E2), monopole transition densities, B(E2)/B(E0). Interacting boson model.

RADIOACTIVITY 150,152,154Tb(EC), (β+), 156Tb(EC) [from Ta(p, X), E=660 MeV]; measured γ(θ), oriented nuclei. 150,152,154,156Gd deduced levels, J, π, γ-multipolarity, δ, rotational band characteristics. TbGd samples, dilution refrigeration. Interacting boson model.

doi: 10.1088/0031-8949/27/1/002
Citations: PlumX Metrics


1983MA71      Nucl.Phys. A411, 125 (1983)

K.Maki-Kuutti, E.Hammaren

A Quasiparticle-Rotor Model with Variable Moments of Inertia: Application to 149,151,153Sm and 109Pd

NUCLEAR STRUCTURE 149,151,153Sm, 109Pd; calculated levels, rotational level characteristics. Quasiparticle-rotor model, variable moments of inertia.

doi: 10.1016/0375-9474(83)90511-0
Citations: PlumX Metrics


1983RE09      Phys.Scr. T5, 45 (1983)

J.Rekstad, A.Henriquez, F.Ingebretsen, G.Midttun, B.Skaali, R.Oyan, J.Wikne, T.Engeland, T.G.Thorsteinsen, E.Hammaren, E.Liukkonen

A Study of the Nuclear Structure at High Energy and Low Spin

NUCLEAR REACTIONS 147,149Sm, 155,157Gd, 161,163Dy(3He, α), E=26 MeV; measured Eα, Iα, γα-coin, γ-multiplicity spectra; deduced structure change in deformed nuclei. 146,148Sm, 156Gd, 160,162Dy deduced < Eγ > vs excitation energy. 154Gd deduced < Eγ > vs excitation energy, γ-transition relative intensities.

doi: 10.1088/0031-8949/1983/T5/007
Citations: PlumX Metrics


1982HA17      Z.Phys. A305, 143 (1982)

E.Hammaren, D.G.Burke

Single-Proton States of 159Ho Studied with the (p, α) Reaction. Spectroscopic Evidence for the Unusual Coriolis Strengths in 159,161,163Ho Nuclei

NUCLEAR REACTIONS 162,164Er(p, α), E=17 MeV; measured σ(Eα), σ(θ). 161Ho levels deduced normalization factors. 159Ho deduced levels, J, π, S, rotational bands, Nilsson assignments. Enriched targets. Triton cluster transfer DWBA, Coriolis mixing calculations.


1982KA07      Nucl.Instrum.Methods 193, 495 (1982)

J.Kantele, E.Hammaren, D.G.Burke, J.C.Waddington

A Test of the Feasibility of γp-Coincidence Techniques in Conjunction with the (t, pγ) Reaction

NUCLEAR REACTIONS 150Sm(t, pγ), E=15 MeV; measured Eγ, Iγ, pγ-coin. Ge(Li), Si-Au detectors.

doi: 10.1016/0029-554X(82)90241-5
Citations: PlumX Metrics


1982KA36      Phys.Scr. 26, 417 (1982)

R.Katajanheimo, A.Siivola, E.Liukkonen, E.Hammaren

Remeasurement of the Lifetime of the Isomeric (9/2)+ State in 155Dy

NUCLEAR REACTIONS 155Gd(3He, 3n), E=27 MeV; measured γ(3He)(t), E(K X-ray), I(K X-ray). 155Dy deduced isomer T1/2, level decay characteristics, hindrance factors. Particle-rotor model.

doi: 10.1088/0031-8949/26/6/001
Citations: PlumX Metrics


1981BU03      Nucl.Phys. A359, 36 (1981)

D.G.Burke, E.Hammaren, G.Lovhoiden, J.A.Cizewski, E.R.Flynn, J.W.Sunier

The Nuclear Structure of 161,163Ho Studied with the (t(pol), α) Reaction

NUCLEAR REACTIONS 162,164Er(polarized t, α), E=17 MeV; measured σ(Eα, θ), A(Eα, θ). 161,163Ho deduced levels, J, π, Nilsson assignments. Enriched targets.

doi: 10.1016/0375-9474(81)90210-4
Citations: PlumX Metrics


1981BU10      Nucl.Phys. A366, 202 (1981)

D.G.Burke, E.Hammaren, C.L.Swift, J.A.Cizewski, E.R.Flynn, J.W.Sunier, G.Lovhoiden

The 159Tb(t, α)158Gd Reaction with 17 MeV Polarized Tritons

NUCLEAR REACTIONS 159Tb(polarized t, α), E=17 MeV; measured σ(Eα, θ), A(Eα, θ). 158Gd deduced levels, J, π, two-quasiparticle Nilsson assignments.

doi: 10.1016/0375-9474(81)90284-0
Citations: PlumX Metrics


1981PI09      Z.Phys. A300, 133 (1981)

M.Piiparinen, R.Pengo, Y.Nagai, E.Hammaren, P.Kleinheinz, N.Roy, L.Carlen, H.Ryde, Th.Lindblad, A.Johnson, S.A.Hjorth, J.Blomqvist

High Spin Shell Model Excitations in 149Gd

NUCLEAR REACTIONS 150Sm(α, 5n), E=67 MeV; 149Sm(α, 4n), E=51 MeV; 148Sm(α, 3n), E=44 MeV; measured Eγ, Iγ, γ(θ), γγ-coin, linear polarization, I(ce). 149Gd deduced levels, J, π, configuration, ICC, γ-branching, T1/2, B(E2). Shell model.

doi: 10.1007/BF01412290
Citations: PlumX Metrics


1980HA13      Nucl.Phys. A339, 465 (1980)

E.Hammaren, E.Liukkonen, R.Katajanheimo, T.Tuurnala

Nanosecond Lifetimes of the Low-Spin States in the Nucleus 147Nd. A Particle-Rotor Model Interpretation of the Results

NUCLEAR REACTIONS 146Nd(d, pγ), E=10 MeV; measured Eγ, Iγ, γγ-coin, γ(t). 147Nd levels deduced T1/2, B(λ). Enriched target. Intrinsic Ge, Ge(Li) detectors, pulsed beam. Rotational model interpretation.

doi: 10.1016/0375-9474(80)90027-5
Citations: PlumX Metrics


1980KO07      Nucl.Phys. A337, 464 (1980)

J.Kownacki, Z.Sujkowski, E.Hammaren, E.Liukkonen, M.Piiparinen, T.Lindblad, H.Ryde, V.Paar

Excited States in 146Sm and 147Sm

NUCLEAR REACTIONS 144,146Nd(α, 2n), (α, 3n), E=20-43 MeV; 146,148Nd(3He, 3n), (3He, 4n), E=19-27 MeV; measured Eγ, Iγ(E), Iγ(θ), γγ(t), αγ(t), I(ce). 146,147Sm deduced levels, J, π, T1/2, ICC. Enriched targets, Ge(Li), Ge detectors, solenoidal, double focusing electron spectrometers with Si(Li) detectors.

doi: 10.1016/0375-9474(80)90154-2
Citations: PlumX Metrics


1979HA19      Nucl.Phys. A321, 71 (1979)

E.Hammaren, E.Liukkonen, M.Piiparinen, J.Kownacki, Z.Sujkowski, T.Lindblad, H.Ryde

Structural Connections between 148Sm and 149Sm Nuclei

NUCLEAR REACTIONS 146Nd(α, 2n), 148Nd(α, 3n), E=20-37 MeV; 148Nd(3He, 3n), 150Nd(3He, 4n), E=19-27 MeV; measured Eγ, Iγ(E), Iγ(θ), γγ-coin, αγ(t), Iγ(t), I(ce), I(ce)(t). 148,149Sm deduced levels, J, π, T1/2, ICC. Enriched targets. Ge(Li), Ge intrinsic detectors, solenoidal, double focussing electron spectrometers, Si(Li) detectors.

doi: 10.1016/0375-9474(79)90686-9
Citations: PlumX Metrics


1979KA11      Phys.Scr. 19, 497 (1979)

R.Katajanheimo, E.Hammaren

Particle-Rotor Model Study of the Transitional N = 89 and Some N = 91-95 Nuclei

NUCLEAR STRUCTURE 161,163Er, 155,157,161Dy, 153,155,157Gd, 151,153Sm, 149Nd; calculated energy levels, relative Iγ; deduced Nilsson assignments. Particle-rotor model.

doi: 10.1088/0031-8949/19/5-6/002
Citations: PlumX Metrics


1979KA16      Phys.Scr. 20, 125 (1979)

R.Katajanheimo, A.Siivola, T.Tuurnala, E.Hammaren, E.Liukkonen

The Isomeric 9/2+ and the Lowest 7/2- State in the Weakly Deformed N = 89 Nuclei

NUCLEAR REACTIONS 148Nd(d, pγ), E=10 MeV; 154Sm(3He, 4nγ), 155Gd(3He, 3nγ), E=27 MeV; measured γγ(t), pγ(t), Eγ. 149Nd, 151Sm, 153Gd, 155,157Dy, 159,161Er deduced levels, T1/2, J, π. Nilsson assignments, B(E1) particle-rotor model, nonspheroidal Woods-Saxon potential.

doi: 10.1088/0031-8949/20/1/023
Citations: PlumX Metrics


1979KO35      Nucl.Phys. A332, 422 (1979)

M.Kortelahti, A.Pakkanen, M.Piiparinen, E.Hammaren, T.Komppa, R.Komu

In-Beam Study and a Rotational Description of Low-Lying Levels in the N = 88 Nucleus 149Pm

NUCLEAR REACTIONS 150Nd(p, 2nγ), E=12.1-15.8 MeV; measured Eγ, Iγ(E), Iγ(θ), γγ-coin, pγ-delay. 149Pm deduced levels, J, π, T1/2. Enriched targets.

doi: 10.1016/0375-9474(79)90011-3
Citations: PlumX Metrics


1978KA16      Z.Phys. A286, 57 (1978)

R.Katajanheimo, T.Tuurnala, E.Hammaren

Level Structure of 170Er Observed in the Decay of the 2.76 min 170Ho

RADIOACTIVITY 170Ho [from 170Er(n, p)]; measured Eβ, T1/2, Eγ, Iγ, γγ-coin, βγ-coin; deduced Q, log ft. 170Er deduced levels, J, π, λ. 169Ho; measured T1/2.

doi: 10.1007/BF01434613
Citations: PlumX Metrics


1977TU01      Z.Phys. A280, 309 (1977)

T.Tuurnala, R.Katajanheimo, E.Hammaren

States of 167Ho from the Decay of Neutron Rich Nuclide 167Dy

RADIOACTIVITY 167Dy; measured T1/2, Eβ, γγ-, βγ-coin, Eγ, Iγ, γ(t), I(ce); deduced Q, ICC. 167Ho deduced levels, K, J, π, λ, B(λ).

doi: 10.1007/BF01434358
Citations: PlumX Metrics


1975HA18      Z.Phys. A272, 341 (1975)

E.Hammaren, P.Puhakka, A.Siivola, T.Tuurnala

Low-Spin States in 151Gd

RADIOACTIVITY 151Tb; measured Eγ, Iγ, I(ce), γγ-coin; deduced ICC, log ft. 151Gd deduced levels, J, π, λ, β.


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