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Search: Author = G.A.Leander

Found 38 matches.

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1989ME06      Phys.Rev. C39, 1876 (1989)

B.S.Meyer, W.M.Howard, G.J.Mathews, K.Takahashi, P.Moller, G.A.Leander

Beta-Delayed Fission and Neutron Emission Calculations for the Actinide Cosmochronometers

NUCLEAR STRUCTURE 234,244,252Fr, 246,248,252,264Ac, 250,252,254,260,270Pa, 252,254,276Np, 251,258,264,277Am; calculated Gamow-Teller strength functions; deduced beta-delayed fission, beta delayed neutron emission, galactic age uncertainities. Actinide cosmochronometers.

doi: 10.1103/PhysRevC.39.1876
Citations: PlumX Metrics

1988BE41      Phys.Scr. 38, 657 (1988)

C.E.Bemis, Jr., F.K.McGowan, J.L.C.Ford, Jr., W.T.Milner, R.L.Robinson, P.H.Stelson, G.A.Leander, C.W.Reich

Coulomb Excitation of States in 229Th

NUCLEAR REACTIONS 229Th(α, α), (α, α'), E=17 MeV; measured σ(Eα), σ(Eα') following Coulomb excitation. 229Th levels deduced excitation probability, B(E2), intrinsic quadrupole, hexadecapole moments, J, π, K, Nilsson assignments.

doi: 10.1088/0031-8949/38/5/004
Citations: PlumX Metrics

1988LE13      Phys.Rev. C37, 2744 (1988)

G.A.Leander, Y.S.Chen

Reflection-Asymmetric Rotor Model of Odd A ≈ 219-229 Nuclei

NUCLEAR STRUCTURE 219,221,223,225Rn, 221,223,225,227Fr, 219,221,223,225,227Ra, 219,223,225,227,229Ac, 221,223,225,227,229Th, 229Pa; calculated levels, B(λ), relative spectroscopic factors, electromagnetic properties; deduced deformation parameters.

doi: 10.1103/PhysRevC.37.2744
Citations: PlumX Metrics

1988LE16      Phys.Rev. C38, 728 (1988)


Statistical E1 and M1 Gamma Strength Functions from Heavy-Ion, xnγ Data

NUCLEAR STRUCTURE A=15-255; 152Dy, 160Er, 162Yb, 164Hf; analyzed M1 transition strengths, E1 strength functions. Statistical model, fusion data input.

doi: 10.1103/PhysRevC.38.728
Citations: PlumX Metrics

1988SH34      Nucl.Phys. A486, 306 (1988)

R.K.Sheline, Y.-S.Chen, G.A.Leander

The Nuclear Spectroscopy and Structure of 223Ra

NUCLEAR STRUCTURE 223Ra; calculated levels, magnetic moment, quadrupole moment. Reflection asymmetric rotor model.

doi: 10.1016/0375-9474(88)90238-2
Citations: PlumX Metrics

1987BO44      Phys.Rev. C36, 2560 (1987)

J.A.Bounds, C.R.Bingham, H.K.Carter, G.A.Leander, R.L.Mlekodaj, E.H.Spejewski, W.M.Fairbank, Jr.

Nuclear Structure of Light Thallium Isotopes as Deduced from Laser Spectroscopy on a Fast Atom Beam

RADIOACTIVITY 189m,190m,191m,192m,193,193m,194m,201Tl; measured hfs; deduced hfs constants. 190m,192m,193,194,194m,201,203Tl deduced μ, rms radii differences. 193m,191m,189mTl deduced quadrupole moment, deformation, μ, rms radii differences. Other data input, fast atom beam laser spectroscopy.

doi: 10.1103/PhysRevC.36.2560
Citations: PlumX Metrics

1987DU04      Phys.Rev.Lett. 59, 1405 (1987)

J.Dudek, W.Nazarewicz, Z.Szymanski, G.A.Leander

Abundance and Systematics of Nuclear Superdeformed States; Relation to the pseudospin and pseudo-SU(3) symmetries

NUCLEAR STRUCTURE 148,152,154Dy, 136,144,150Sm, 132,134,144Nd, 128,132,142Ce; calculated potential energy surfaces; deduced super elongation particle number dependence, superdeformation effects.

doi: 10.1103/PhysRevLett.59.1405
Citations: PlumX Metrics

1987HE01      J.Phys.(London) G13, 43 (1987)

M.A.Herath-Banda, A.V.Ramayya, L.Cleemann, J.Eberth, J.Roth, T.Heck, N.Schmal, T.Mylaeus, W.Koenig, B.Martin, K.Bethge, G.A.Leander

Signature Splitting of Electromagnetic Transitions in 75Kr

NUCLEAR REACTIONS 46Ti(32S, n2p), E=85-150 MeV; measured σ(Eγ, E), σ(θ), nγγ-, γγ-coin, Eγ, Iγ. 75Kr deduced levels, J, π. Enriched target, Ge(Li), neutron multiplicity detectors. Theoretical analysis.

doi: 10.1088/0305-4616/13/1/008
Citations: PlumX Metrics

1987KE05      Phys.Rev. C36, 1514 (1987)

B.D.Kern, R.L.Mlekodaj, G.A.Leander, M.O.Kortelahti, E.F.Zganjar, R.A.Braga, R.W.Fink, C.P.Perez, W.Nazarewicz, P.B.Semmes

Transition through Triaxial Shapes of the Light Samarium Isotopes and the Beta Decay of 136,138,140Eu

NUCLEAR REACTIONS 92Mo(48Ti, xnp), E=220 MeV; 112Sn(28Si, xnp), E=170, 190 MeV; measured Eγ, Iγ, γγ-coin. Enriched targets, Ge detectors, magnetic isotope separator.

RADIOACTIVITY 136,138,140Eu(β+), (EC) [from 92Mo(48Ti, pxn), E=220 MeV; 112Sn(28Si, xnp), E=170, 190 MeV]; measured Eγ, Iγ, γγ-coin. 136,138,140Sm deduced levels. Enriched targets, Ge detectors, magnetic isotope separator.

NUCLEAR STRUCTURE 136,138,140Sm; calculated levels. Wood-Saxon Strutinsky, triaxial models, interacting boson approximation.

doi: 10.1103/PhysRevC.36.1514
Citations: PlumX Metrics

1987LE05      Phys.Rev. C35, 1145 (1987)

G.A.Leander, Y.S.Chen

Rigid Reflection-Asymmetric Rotor Description of the Nucleus 227Ac

NUCLEAR STRUCTURE 227Ac; calculated levels, structure factor. Particle-rotor model, static octupole deformation.

doi: 10.1103/PhysRevC.35.1145
Citations: PlumX Metrics

1987NA10      Nucl.Phys. A467, 437 (1987)

W.Nazarewicz, G.A.Leander, J.Dudek

Octupole Shape and Shape Changes at High Spins in Ra and Th Nuclei

NUCLEAR STRUCTURE 218,220,222,224,226Ra, 230,222,224,226,228Th; calculated levels, routhians, rotational band properties, shapes, B(E1)/B(E2) ratios; deduced shape spin dependence. Cranking model.

doi: 10.1016/0375-9474(87)90539-2
Citations: PlumX Metrics

1987PA02      Phys.Rev.Lett. 58, 984 (1987)

E.S.Paul, C.W.Beausang, D.B.Fossan, R.Ma, W.F.Piel, Jr., N.Xu, L.Hildingsson, G.A.Leander

Collective Oblate Band in 131La Due to the Rotational Alignment of h11/2 Neutrons

NUCLEAR REACTIONS 116Cd(19F, 4nγ), E=76 MeV; measured γγ-coin. 131La deduced levels, J, π, band structure, shape characteristics. Ge detectors. Cranked shell model calculations.

doi: 10.1103/PhysRevLett.58.984
Citations: PlumX Metrics

1987WE06      Phys.Rev. C36, 431 (1987)

J.C.Wells, N.R.Johnson, C.Baktash, I.Y.Lee, F.K.McGowan, M.N.Rao, L.L.Riedinger, V.Janzen, W.C.Ma, Shuxian Wen, Ze-Min Chen, P.B.Semmes, G.A.Leander, Y.S.Chen

Low-Frequency Anomaly in 172Os Moment of Inertia

NUCLEAR STRUCTURE 172Os; calculated dynamical moments of inertia. Cranked shell model, three-band-mixing calculations.

NUCLEAR REACTIONS 144Nd(32S, 4n), E=162 MeV; measured Eγ, Iγ, γγ-coin. 172Os deduced levels, yrast sequence moments of inertia, J, π. Cranked shell model, three-band mixing calculations.

doi: 10.1103/PhysRevC.36.431
Citations: PlumX Metrics

1986BA14      Phys.Rev. C33, 1461 (1986)

D.Ballon, Y.Niv, S.Vajda, N.Benczer-Koller, L.Zamick, G.A.Leander

Magnetic Moments of the (3/2)1- and (5/2)1- States in 107,109Ag

NUCLEAR REACTIONS 107,109Ag(32S, 32S'), E=80 MeV; measured γγ(θ, H), γ(32S)-coin following Coulomb excitation. 107,109Ag levels deduced g ratio.

doi: 10.1103/PhysRevC.33.1461
Citations: PlumX Metrics

1986CH40      Phys.Rev. C34, 1935 (1986)

Y.S.Chen, P.B.Semmes, G.A.Leander

Calculation of M1 Transition Rates at High Spin in Axial Nuclei

NUCLEAR STRUCTURE 165Lu, 81Kr, 166Hf; calculated yrast levels, g factors, B(M1). Cranking, particle-rotor models.

doi: 10.1103/PhysRevC.34.1935
Citations: PlumX Metrics

1986LA08      Phys.Lett. 169B, 21 (1986)

A.J.Larabee, M.P.Carpenter, L.L.Riedinger, L.H.Courtney, J.C.Waddington, V.P.Janzen, W.Nazarewicz, J.-Y.Zhang, R.Bengtsson, G.A.Leander

Shape Coexistence and Alignment Processes in the Light Pt and Au Region

NUCLEAR REACTIONS 170Yb(19F, 4n), E=97 MeV; measured γγ-coin. 185Au deduced levels, J, π, γ-branching, band deformations, shape coexistence.

doi: 10.1016/0370-2693(86)90678-7
Citations: PlumX Metrics

1986LE05      Nucl.Phys. A453, 58 (1986)

G.A.Leander, W.Nazarewicz, G.F.Bertsch, J.Dudek

Low-Energy Collective E1 Mode in Nuclei

NUCLEAR STRUCTURE 218,220,222,224,226Ra, 220,222,224,226,228Th; calculated B(E1)/B(E2) branching ratio; deduced isovector E1 moment shell effect dependence.

doi: 10.1016/0375-9474(86)90029-1
Citations: PlumX Metrics

1986MO03      Z.Phys. A323, 41 (1986)

P.Moller, G.A.Leander, J.R.Nix

On the Stability of the Transeinsteinium Elements

NUCLEAR STRUCTURE Z>100; calculated Q(α), fission T1/2, ground state property microscopic corrections; deduced 288100, 299100 superheavy high stability.

1986RA07      Phys.Rev.Lett. 57, 667 (1986)

M.N.Rao, N.R.Johnson, F.K.McGowan, I.Y.Lee, C.Baktash, M.Oshima, J.W.McConnell, J.C.Wells, A.Larabee, L.L.Riedinger, R.Bengtsson, Z.Xing, Y.S.Chen, P.B.Semmes, G.A.Leander

Loss of Collectivity at High Spin in 172W and a Three-Band Interpretation of First Yrast Upbends

NUCLEAR REACTIONS 124Sn(52Cr, 4n), E=230 MeV; measured γγ-coin, Doppler shift recoil distance. 172W deduced levels, J, π, T1/2, yrast sequence, dynamical moment of inertia, configuration, transition quadrupole moments.

doi: 10.1103/PhysRevLett.57.667
Citations: PlumX Metrics

1986RE04      Phys.Lett. 169B, 148 (1986)

C.W.Reich, I.Ahmad, G.A.Leander

E1 Transition Probabilities Within the K(π) = 1/2(±) Parity-Doublet Bands in 225Ra

NUCLEAR STRUCTURE 225Ra; analyzed data; deduced parity doublet band B(E1) systematics.

doi: 10.1016/0370-2693(86)90639-8
Citations: PlumX Metrics

1985BO46      Phys.Rev.Lett. 55, 2269 (1985)

J.A.Bounds, C.R.Bingham, P.Juncar, H.K.Carter, G.A.Leander, R.L.Mlekodaj, E.H.Spejewski, W.M.Fairbank, Jr.

Role of Deformation in the Intrusion of the h9/2 Levels below the Z = 82 Proton Shell

RADIOACTIVITY 189,191,193Tl(β+), (EC); 193mTl(IT); measured hfs, isotope shift; deduced isomer intrinsic, spectroscopic quadrupole moments, deformation β2.

doi: 10.1103/PhysRevLett.55.2269
Citations: PlumX Metrics

1985LE04      Phys.Lett. 152B, 284 (1985)

G.A.Leander, W.Nazarewicz, P.Olanders, I.Ragnarsson, J.Dudek

A New Region of Intrinsic Reflection Asymmetry in Nuclei Around 145Ba ( Question )

NUCLEAR STRUCTURE 146Ba; calculated single particle level vs quadrupole, octupole deformation. 145Cs, 145Ba; calculated ground state J, μ; deduced region of intrinsic reflection asymmetry.

doi: 10.1016/0370-2693(85)90496-4
Citations: PlumX Metrics

1985RA04      Phys.Rev.Lett. 54, 982 (1985)

I.Ragnarsson, T.Bengtsson, W.Nazarewicz, J.Dudek, G.A.Leander

Band Termination at Very High Spin in 158Yb

NUCLEAR STRUCTURE 158,168Yb, 152Dy; analyzed level, yrast E2 transition data. 158Yb deduced band termination at high spin.

doi: 10.1103/PhysRevLett.54.982
Citations: PlumX Metrics

1984CO17      Phys.Rev. C30, 1267 (1984)

J.D.Cole, J.H.Hamilton, A.V.Ramayya, W.Lourens, B.van Nooijen, H.Kawakami, L.A.Mink, E.H.Spejewski, H.K.Carter, R.L.Mlekodaj, G.A.Leander, L.L.Riedinger, C.R.Bingham, E.F.Zganjar, J.L.Wood, R.W.Fink, K.S.Toth, B.D.Kern, K.S.R.Sastry

Decay of 188Tl and Observed Shape Coexistence in the Bands of 188Hg

RADIOACTIVITY 188Tl(β+), (EC) [from 181Ta(16O, 9n), E=143-145 MeV; 180W(14N, 6n), E=184-188 MeV]; measured Eγ, Iγ, I(ce), γγ-, γ(ce)-coin. 188Tl levels deduced T1/2. 188Hg deduced levels, J, π, γ-branching, δ, ICC.

doi: 10.1103/PhysRevC.30.1267
Citations: PlumX Metrics

1984EL07      ATOMKI Kozlem. 26, 30 (1984)

H.El-Samman, V.Barci, T.Bengtsson, A.Gizon, J.Gizon, L.Hildingsson, D.Jerrestam, W.Klamra, R.Kossakowski, G.A.Leander, Th.Lindblad

Collective Moment of Inertia of 118,122Xe and 128,130Ba

NUCLEAR REACTIONS 112,117,122Sn, 123Sb(12C, xnyp), E not given; measured γγ-coin, energy correlations. 122,118Xe, 128,130Ba deduced dynamic moment of inertia.

1984EL08      Nucl.Phys. A427, 397 (1984)

H.El-Samman, V.Barci, A.Gizon, J.Gizon, L.Hildingsson, D.Jerrestam, W.Klamra, R.Kossakowski, Th.Lindblad, T.Bengtsson, G.A.Leander

On the Difference of the Dynamic Moment of Inertia I(2) Band for Xe and Ba Nuclei

NUCLEAR REACTIONS 112,117,112Sn(12C, X), E=80-118 MeV; 123Sb(12C, X), E=118 MeV; measured γγ-coin, γ-ray multiplicity; deduced γγ-energy correlation matrices. 118,122Xe, 128,130Ba deduced dynamic I(2) band moment of inertia.

doi: 10.1016/0375-9474(84)90091-5
Citations: PlumX Metrics

1984LE04      Nucl.Phys. A413, 375 (1984)

G.A.Leander, R.K.Sheline

Intrinsic Reflection Asymmetry in Odd-A Nuclei

NUCLEAR STRUCTURE 225Ac, 225Ra; calculated Nilsson quasiparticle levels. 221,223,225,227,229Ac; calculated K=1/2 band decoupling parameter. 221,223,225,227Ra; calculated K=1/2 band decoupling parameter, μ. 229Ra; calculated μ. 223,225,227Ac; calculated α-transition rates, hindrance factors. 227,229,231Pa; calculated α-decay hindrance factors. 229Th; calculated levels. Intrinsic reflection symmetry.

doi: 10.1016/0375-9474(84)90417-2
Citations: PlumX Metrics

1984LE12      Phys.Rev. C30, 416 (1984)

G.A.Leander, J.Dudek, W.Nazarewicz, J.R.Nix, Ph.Quentin

Single-Particle Levels in the Doubly Magic 132Sn and 100Sn Nuclei

NUCLEAR STRUCTURE 56Ni, 100,132Sn, 208Pb; calculated single particle binding energies. Woods-Saxon, folded Yukawa, Skyrme interaction models.

doi: 10.1103/PhysRevC.30.416
Citations: PlumX Metrics

1984NA08      Phys.Rev.Lett. 52, 1272 (1984); Erratum Phys.Rev.Lett. 53, 2060 (1984)

W.Nazarewicz, P.Olanders, I.Ragnarsson, J.Dudek, G.A.Leander

High-Spin Consequences of Octupole Shape in Nuclei around 222Th

NUCLEAR STRUCTURE 222Th; calculated β2, β3, potential energy deformation, neutron quasiparticle Routhians, rotational band angular momentum vs rotational frequency; deduced no octupole deformation backbend relationship. Woods-Saxon-Bogolyubov cranking calculation.

doi: 10.1103/PhysRevLett.52.1272
Citations: PlumX Metrics

1984NA22      Nucl.Phys. A429, 269 (1984)

W.Nazarewicz, P.Olanders, I.Ragnarsson, J.Dudek, G.A.Leander, P.Moller, E.Ruchowska

Analysis of Octupole Instability in Medium-Mass and Heavy Nuclei

NUCLEAR STRUCTURE 146Ba, 224Ra; calculated octupole deformation energy. 72Se, 92Kr, 146Ba, 224Th; calculated octupole deformation potential energy. 74,90Kr; calculated shell plus pairing, Strutinsky energies. 140,142,144,146,148Xe, 142,144,146,148,150Ba, 142,144,146,148,150,152Ce, 146,148,150,152,154Nd, 218Po, 218,220,222,224,226Rn, 218,220,222,224,226,228,230Ra, 220,222,224,226,228,230Th, 222,224,226,228,230U; calculated equilibrium shapes. Strutinsky type calculations.

doi: 10.1016/0375-9474(84)90208-2
Citations: PlumX Metrics

1983AR18      Phys.Scr. T5, 157 (1983)

P.Arve, Y.S.Chen, G.A.Leander

Microscopic Calculations of Nuclear Wobbling Rotation

NUCLEAR STRUCTURE 179Hf; calculated high-K configuration moment of inertia. 179W; calculated levels. 158Yb; calculated quasicontinuum level energy vs K. Microscopic model, nuclear wobbling rotation.

doi: 10.1088/0031-8949/1983/T5/029
Citations: PlumX Metrics

1983CH46      Phys.Rev. C28, 2437 (1983)

Y.S.Chen, S.Frauendorf, G.A.Leander

Shape of Rotating Quasiparticle Orbits and Signature Splitting in La, Ce, and Pr Nuclei

NUCLEAR STRUCTURE 129,130,131,133,134,135Ce, 129,130,133,134La, 130,131,134,135Pr; calculated yrast, near-yrast band Routhians, (γ) deformation signature splitting. Cranking model.

doi: 10.1103/PhysRevC.28.2437
Citations: PlumX Metrics

1983KE08      Phys.Rev. C28, 2168 (1983)

B.D.Kern, K.S.Toth, D.M.Moltz, J.Lin, F.T.Avignone III, H.Noma, G.A.Leander

Beta Decay of 75Rb to Low-Lying Levels in 75Kr

RADIOACTIVITY 75Rb(β+) [from 58Ni(20Ne, p2n)]; measured T1/2, Eγ, Iγ, γγ-coin. 75Kr deduced levels, J, π. Mass separated samples.

doi: 10.1103/PhysRevC.28.2168
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1983LE15      Nucl.Phys. A400, 97c (1983)

G.A.Leander, P.Arve, T.Bengtsson, I.Ragnarsson, J.Y.Zhang

Theoretical Aspects of High-Spin States

NUCLEAR STRUCTURE 160Er; calculated level spin vs transition energy. Cranking model.

doi: 10.1016/0375-9474(83)90429-3
Citations: PlumX Metrics

1983SH16      Phys.Rev.Lett. 51, 359 (1983)

R.K.Sheline, G.A.Leander

Strong and Weak Coupling to the Octupole-Deformed Mode in 22789Ac

NUCLEAR STRUCTURE 227Ac; analyzed level scheme; deduced degenerate band intrinsic g, absolute decoupling parameters, bandhead K, π.

doi: 10.1103/PhysRevLett.51.359
Citations: PlumX Metrics

1983YA03      Phys.Lett. 128B, 33 (1983)

H.Yamada, A.Ahmed, H.Banda, J.H.Hamilton, C.F.Maguire, R.B.Piercey, A.V.Ramayya, S.A.Hjorth, D.C.Hensley, J.D.Cole, G.A.Leander

Eγ - Eγ Correlations from Partial Fusion Reactions

NUCLEAR REACTIONS 154Sm(14N, xnp), (14N, xnd), (14N, xnt)157Er/158Er/159Er, E=167 MeV; measured γγ energy correlations, (particle)γ-coin. 158Er deduced rotational band structure. Partial fusion reaction.

doi: 10.1016/0370-2693(83)90068-0
Citations: PlumX Metrics

1982CH30      Phys.Rev. C26, 2607 (1982)

Y.-S.Chen, G.A.Leander

Quasicontinuum Properties of M1 Spectra in the Particle-Rotor Model

NUCLEAR STRUCTURE 159,161,163,165,167,169,171,173,175,177Yb, 127,129,131,133,135,137,139Ce, 131Pr, 129La, 127Cs, 125I, 123Sb; calculated M1 quasicontinuum γ-spectra; deduced particle, quasiparticle number dependence. Core-quasiparticle coupling models.

doi: 10.1103/PhysRevC.26.2607
Citations: PlumX Metrics

1982LE19      Nucl.Phys. A388, 452 (1982)

G.A.Leander, R.K.Sheline, P.Moller, P.Olanders, I.Ragnarsson, A.J.Sierk

The Breaking of Intrinsic Reflection Symmetry in Nuclear Ground States

NUCLEAR STRUCTURE 218,220Po, 218,220,222,224,226Rn, 220,222,224,226,228,230,232,234Ra, 220,222,224,226,228,230,232,234,236Th, 222,224,226,228,230,232U; calculated potential energy minima. 223,225,227Ac, 227Ra, 229,231Th, 233Pa, 233U; calculated octupole separation energy. Intrinsic reflection symmetry breaking.

doi: 10.1016/0375-9474(82)90471-7
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