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Search: Author = R.G.Lovas

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2016LO08      Phys.Rev. C 93, 069801 (2016)

R.G.Lovas

Comment on "α decay in the complex-energy shell model"

RADIOACTIVITY 212Po(α); discussed eigenvalue problem of the core+α norm operator in connection with calculations of fragmentation amplitude, α-decay width, and α-spectroscopic factor in 2012Be31 reference. Probability of clustering. Complex-energy shell model, cluster-configuration shell model, and stochastic shell model.

doi: 10.1103/PhysRevC.93.069801
Citations: PlumX Metrics


2014SA32      Phys.Rev. C 89, 054609 (2014)

P.Salamon, R.G.Lovas, R.M.Id Betan, T.Vertse, L.Balkay

Strictly finite-range potential for light and heavy nuclei

doi: 10.1103/PhysRevC.89.054609
Citations: PlumX Metrics


2012DA07      Phys.Rev. C 86, 014314 (2012)

J.Darai, A.Racz, P.Salamon, R.G.Lovas

Antibound poles in cut-off Woods-Saxon and strictly finite-range potentials

doi: 10.1103/PhysRevC.86.014314
Citations: PlumX Metrics


2004LO12      Acta Phys.Hung.N.S. 19, 305 (2004)

R.G.Lovas, K.Varga, Y.Suzuki

Description of Nuclei in Terms of Their Substructures

NUCLEAR STRUCTURE 6,11Li; calculated binding energies, radii, quadrupole moments, μ. Cluster models.

NUCLEAR REACTIONS 12C(11Li, X), E=800 MeV/nucleon; calculated reaction σ.

doi: 10.1556/APH.19.2004.3-4.27
Citations: PlumX Metrics


2002SU11      Nucl.Phys. A706, 123 (2002)

Y.Suzuki, M.Takahashi, R.G.Lovas, K.Varga

Cluster Correlations, Clustering and Halo Structure

NUCLEAR STRUCTURE 3H, 4He, 6Li, 12C, 16O; calculated binding energies. 6He, 8Be; calculated pair correlation functions. 4,6He; calculated particle densities. Comparison of correlated and uncorrelated bases.

doi: 10.1016/S0375-9474(02)00864-3
Citations: PlumX Metrics


2002SU30      Prog.Theor.Phys.(Kyoto), Suppl. 146, 413 (2002)

Y.Suzuki, R.G.Lovas, K.Varga

Study of Light Exotic Nuclei with a Stochastic Variational Method - Application to Lithium Isotopes -

NUCLEAR STRUCTURE 7,8,9,10,11Li; calculated level energies, configurations, μ, quadrupole moments. Extended cluster model, comparison with data.

doi: 10.1143/PTPS.146.413
Citations: PlumX Metrics


2002VA19      Phys.Rev. C66, 041302 (2002)

K.Varga, Y.Suzuki, R.G.Lovas

Microscopic multicluster model of 9, 10, 11Li

NUCLEAR STRUCTURE 9,10,11Li; calculated energies, radii, wave functions. 9,11Li calculated μ, quadrupole moments. Microscopic cluster model.

doi: 10.1103/PhysRevC.66.041302
Citations: PlumX Metrics


1999AR08      Phys.Rev. C59, 1432 (1999)

K.Arai, Y.Suzuki, R.G.Lovas

Structure of 6He with an Extended Three-Cluster Model

NUCLEAR STRUCTURE 6He; calculated binding energy, radii, density distributions. Extended three-cluster model, core structure considered.

doi: 10.1103/PhysRevC.59.1432
Citations: PlumX Metrics


1999TA07      Phys.Rev. C59, 1391 (1999)

N.Tanaka, Y.Suzuki, K.Varga, R.G.Lovas

Unbound States by Analytic Continuation in the Coupling Constant

NUCLEAR STRUCTURE 5He, 5Li, 8,9Be, 9B; calculated unbound states E, Γ. Analytic continuation in the coupling constant, comparison with complex scaling method.

doi: 10.1103/PhysRevC.59.1391
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1998LO10      Phys.Rep. 294, 265 (1998)

R.G.Lovas, R.J.Liotta, A.Insolia, K.Varga, D.S.Delion

Microscopic Theory of Cluster Radioactivity

doi: 10.1016/S0370-1573(97)00049-5
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1997LO15      Nuovo Cim. 110A, 907 (1997)

R.G.Lovas, K.Arai, Y.Suzuki, K.Varga

Numerically Exact Description of Multicluster Bound States

NUCLEAR STRUCTURE 6He; calculated binding energy, separation energy, radii. Cluster model.

doi: 10.1007/BF03035925
Citations: PlumX Metrics


1996CS01      Phys.Rev. C53, 1444 (1996)

A.Csoto, R.G.Lovas

Comment on ' Large-Space Shell-Model Calculations for Light Nuclei '

NUCLEAR STRUCTURE 7Li; calculated quadrupole moment vs α+t separation energy; deduced sensitivity, implications for 6Li, 5He nuclei studies. No-core, large space shell model.

doi: 10.1103/PhysRevC.53.1444
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1994CO10      Phys.Rev. C50, 1308 (1994)

S.G.Cooper, R.S.Mackintosh, A.Csoto, R.G.Lovas

Local 4He-p Potentials from Resonating-Group Method Phase Shifts

NUCLEAR REACTIONS 4He(p, p), E ≤ 20 MeV; calculated phase shifts vs E; deduced phase equivalent potentials, local potentials comparison. Multi-channel resonating group method.

doi: 10.1103/PhysRevC.50.1308
Citations: PlumX Metrics


1994VA07      Nucl.Phys. A571, 447 (1994)

K.Varga, Y.Suzuki, R.G.Lovas

Microscopic Multicluster Description of Neutron-Halo Nuclei with a Stochastic Variational Method

NUCLEAR STRUCTURE 8,6He; calculated energy, rms radius; deduced models dependence convergence. Halo nuclei, microscopic multi-cluster description, stochastic variational method.

doi: 10.1016/0375-9474(94)90221-6
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1994VA31      Z.Phys. A349, 345 (1994)

K.Varga, R.G.Lovas, R.J.Liotta

Absolute Alpha-Decay Width of 212Po in an Mixed Shell-and-Cluster Model

RADIOACTIVITY 212Po(α); calculated absolute α-decay width. Shell plus α-cluster models.

doi: 10.1007/BF01288990
Citations: PlumX Metrics


1994VA32      Z.Phys. A349, 347 (1994)

K.Varga, R.G.Lovas, Y.Suzuki

Microscopic Multicluster Description of Neutron Halos

NUCLEAR STRUCTURE 6,8He; calculated energies, rms radii. Microscopic, multi-cluster approach, different model spaces.

doi: 10.1007/BF01288991
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1993CS02      Phys.Rev.Lett. 70, 1389 (1993)

A.Csoto, R.G.Lovas, A.T.Kruppa

Two-Pole Structure of the (3/2)+ Resonance of 5He in a Dynamical Microscopic Model

NUCLEAR REACTIONS 3H(d, d), E ≤ 150 keV; 4He(n, n), ≤ 6 MeV; analyzed phase shifts. 5He, 5Li deduced 3/2 resonance characteristics. Dynamical microscopic model.

doi: 10.1103/PhysRevLett.70.1389
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1992CS04      Phys.Rev. C46, 576 (1992)

A.Csoto, R.G.Lovas

Dynamical Microscopic Three-Cluster Description of 6Li

NUCLEAR STRUCTURE 6Li; calculated d+α, α+p+n breakup spectroscopic factors, ground state energy vs clusterization components. Dynamical microscopic cluster model.

doi: 10.1103/PhysRevC.46.576
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1992VA09      Phys.Rev.Lett. 69, 37 (1992)

K.Varga, R.G.Lovas, R.J.Liotta

Absolute Alpha Decay Width of 212Po in a Combined Shell and Cluster Model

RADIOACTIVITY 212Po(α); calculated α-decay width. Combined shell, cluster models.

doi: 10.1103/PhysRevLett.69.37
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1992VA15      Nucl.Phys. A550, 421 (1992)

K.Varga, R.G.Lovas, R.J.Liotta

Cluster-Configuration Shell Model for Alpha Decay

NUCLEAR STRUCTURE 212Po; calculated cluster states, transition to 208Pb ground state by α-emission. One-, two-nucleon plus 208Pb systems also studied. Shell, cluster models, linear variational approach, R-matrix description of decay.

doi: 10.1016/0375-9474(92)90017-E
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1991VA01      Phys.Rev. C43, 1201 (1991)

K.Varga, R.G.Lovas

Signature of Cluster Substructure: α + d spectroscopic factor of 6Li

NUCLEAR STRUCTURE 6Li; calculated (α+d) spectroscopic factors, relative momentum distribution. Three-Particle model.

doi: 10.1103/PhysRevC.43.1201
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1990LO14      Nucl.Phys. A516, 325 (1990)

R.G.Lovas, A.T.Kruppa, J.B.J.M.Lanen

Cluster-Model Interpretation of the 6Li(e, e'p) Reaction

NUCLEAR REACTIONS 6Li(e, e'p), E not given; calculated missing energy, momentum distributions. Cluster model.

doi: 10.1016/0375-9474(90)90312-A
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1989LA22      Phys.Rev.Lett. 63, 2793 (1989)

J.B.J.M.Lanen, R.G.Lovas, A.T.Kruppa, H.P.Blok, J.F.J.van den Brand, R.Ent, E.Jans, G.J.Kramer, L.Lapikas, E.N.M.Quint, G.van der Steenhoven, P.C.Tiemeijer, P.K.A.de Witt Huberts

(e, e'p) Study of Triton + Deuteron + Proton Clustering in 6Li

NUCLEAR REACTIONS 6Li(e, e'p), E not given; measured momentum distribution, spectral function missing energy dependences. 6Li deduced clustering effects.

doi: 10.1103/PhysRevLett.63.2793
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1988KR01      Phys.Rev. C37, 383 (1988)

A.T.Kruppa, R.G.Lovas, B.Gyarmati

Complex Scaling in the Cluster Model: Resonances in 8Be

NUCLEAR STRUCTURE 8Be; calculated resonances, Γ. Resonating group model.

doi: 10.1103/PhysRevC.37.383
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1988VA18      Phys.Rev. C37, 2906 (1988)

K.Varga, R.G.Lovas

Eigenvalue Problem of the Resonating-Group Norm Operator with Mixed Cluster States

NUCLEAR STRUCTURE 6Li; calculated ground state wave function; deduced configuration mixing role. Cluster states, resonating group norm operator.

doi: 10.1103/PhysRevC.37.2906
Citations: PlumX Metrics


1987LO16      Nucl.Phys. A474, 451 (1987)

R.G.Lovas, A.T.Kruppa, R.Beck, F.Dickmann

Fragmentation Properties of 6Li

NUCLEAR REACTIONS 6Li(p, pd), E=670, 590 MeV; 6Li(α, 2α), E=700 MeV; 6Li(p, p3He), E not given; calculated fragmentation strengths.

NUCLEAR STRUCTURE 6Li; calculated α+d, t+3He cluster fragmentation amplitudes. 3,2H, 3,4He; calculated rms charge radii, binding energies.

doi: 10.1016/0375-9474(87)90626-9
Citations: PlumX Metrics


1986KR12      Phys.Lett. 179B, 317 (1986)

A.T.Kruppa, R.G.Lovas, R.Beck, F.Dickmann

Breathing Cluster Model for Nuclei of Two s-Wave Clusters

NUCLEAR STRUCTURE 5He, 6,7Li, 7,8Be; calculated binding energies. 6Li; calculated charge form factor square, α-d fragmentation strength. Breathing model, two s-wave clusters.

doi: 10.1016/0370-2693(86)90484-3
Citations: PlumX Metrics


1985BE60      Nucl.Phys. A446, 703 (1985)

R.Beck, F.Dickmann, R.G.Lovas

Quasielastic Cluster Knock-Out Reactions and the Microscopic Cluster Model

NUCLEAR REACTIONS 6Li(p, pd), (α, 2α), E not given; calculated spectroscopic amplitude vs α-d relative momentum; deduced Sα. Quasielastic cluster knockout reactions.

NUCLEAR STRUCTURE 6Li; calculated fragmentation amplitude, Sα. Microscopic cluster model, (α+d), (5He+p) clusters.

doi: 10.1016/0375-9474(85)90638-4
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1985LO16      Z.Phys. A322, 589 (1985)

R.G.Lovas

On Fliessbach's Approaches to Direct Reactions

NUCLEAR REACTIONS 16O(7Li, t), E not given; calculated spectroscopic factors. Fleissbach approach, direct reactions.

doi: 10.1007/BF01415138
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1985SH22      J.Phys.(London) G11, 1199 (1985)

R.Shyam, R.G.Lovas, K.F.Pal, V.K.Sharma, M.A.Nagarajan

DWBA Analyses of (7Li, t) Reactions with Realistic Potential Overlap

NUCLEAR REACTIONS 12C, 40,44Ca, 58Ni(7Li, t), E=34 MeV; calculated σ(θ); deduced optical model potentials. 16O, 44,48Ti, 62Zn levels deduced Sα. Finite-range DWBA analysis.

doi: 10.1088/0305-4616/11/11/006
Citations: PlumX Metrics


1984LO09      Nucl.Phys. A424, 143 (1984)

R.G.Lovas, K.F.Pal

Cluster Transfer Form Factor and Intercluster Relative Motion in the Orthogonality-Condition Model

NUCLEAR REACTIONS 4He(t, t), E not given; calculated potential parameters, overlap vs separation distance. Orthogonality condition model.

NUCLEAR STRUCTURE 7Li; calculated (α+t) cluster form factor, intercluster relative motion. Orthogonality condition model.

doi: 10.1016/0375-9474(84)90132-5
Citations: PlumX Metrics


1983LO09      Nucl.Phys. A402, 141 (1983)

R.G.Lovas, K.F.Pal, M.A.Nagarajan

Generator-Coordinate Calculation of the Potential Overlap for the DWBA Description of Cluster Transfer Reactions

NUCLEAR REACTIONS 12C(7Li, t), E not given; calculated σ(θ). DWBA, cluster transfer, generator coordinate potential overlap calculation.

doi: 10.1016/0375-9474(83)90565-1
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1983LO17      Phys.Rev. C28, 2463 (1983)

R.G.Lovas

Transition Density of Charge-Exchange Processes

NUCLEAR STRUCTURE 42,48Ca, 90Zr, 116Sn, 208Pb; calculated charge exchange transition density coefficient correction terms. Perturbative approach, Coulomb, core polarization effects.

doi: 10.1103/PhysRevC.28.2463
Citations: PlumX Metrics


1983PA06      Nucl.Phys. A402, 114 (1983)

K.F.Pal, R.G.Lovas, M.A.Nagarajan, B.Gyarmati, T.Vertse

Microscopic Description of 7Li and 7Be for the DWBA Treatment of Cluster Transfer Reactions

NUCLEAR REACTIONS 12C(7Li, t), E=34 MeV; calculated σ(θ); deduced potential parameters. Finite range DWBA, generator coordinate cluster for projectile, schematic nucleon-nucleon forces.

doi: 10.1016/0375-9474(83)90564-X
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1981GY02      J.Phys.(London) G7, L209 (1981)

B.Gyarmati, R.G.Lovas, T.Vertse, P.E.Hodgson

Low-Energy Behaviour of the Real Depth of the Proton Optical Potential

NUCLEAR REACTIONS 116Sn(p, p), (n, n), E=5-25 MeV; calculated σ(E); deduced collective effects on optical potential real term energy dependence. Model calculation, elastic to inelastic channel coupling.

doi: 10.1088/0305-4616/7/9/005
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1981LO03      Nucl.Phys. A357, 205 (1981)

R.G.Lovas, B.A.Brown, P.E.Hodgson

Coulomb Mixing and Core Polarization in (p, n(bar)) Quasi-Elastic Scattering

NUCLEAR REACTIONS 42,44,48Ca(p, n), E=25 MeV; 58Ni(p, n), E=22.8 MeV; calculated σ(θ). Generalized Lane model, Coulomb distortions, excess neutron polarizing effect.

doi: 10.1016/0375-9474(81)90634-5
Citations: PlumX Metrics


1980BR12      Nucl.Phys. A341, 377 (1980)

F.A.Brieva, R.G.Lovas

Lane Model on Microscopic Grounds

NUCLEAR REACTIONS 48Ca, 90Zr, 208Pb(p, n), E=25, 35, 45 MeV; calculated σ(θ); deduced microscopic Lane potential. Energy, density dependent complex effective interactions.

doi: 10.1016/0375-9474(80)90371-1
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1980PA20      Phys.Lett. B96, 19 (1980)

K.F.Pal, R.G.Lovas

Local-Potential α-Cluster Model for 40Ca and 44Ti

NUCLEAR STRUCTURE 44Ti, 40Ca; calculated levels, rotational bands, B(E2). Local potential, α-cluster model.

doi: 10.1016/0370-2693(80)90202-6
Citations: PlumX Metrics


1979LO10      J.Phys.(London) G5, L175 (1979)

R.G.Lovas

Deformation of the Neutron Excess and (p, n) Scattering

NUCLEAR REACTIONS 26Mg(p, n), E=22.8 MeV; calculated σ(θ). 26Mg deduced deformation of neutron excess. Coupled-channels analysis, Lane model.

doi: 10.1088/0305-4616/5/10/006
Citations: PlumX Metrics


1978CS01      Nucl.Phys. A294, 41 (1978)

L.P.Csernai, J.Zimanyi, B.Gyarmati, R.G.Lovas

Strength Decoupling from the Giant Dipole Resonance Upon Diagonalizing a Gaussian Force and a δ-Force on a Particle-Hole Basis

NUCLEAR STRUCTURE 116Sn; calculated transition rate. Finite-range gaussian.

doi: 10.1016/0375-9474(78)90393-7
Citations: PlumX Metrics


1978LO11      Nucl.Phys. A304, 282 (1978)

R.G.Lovas

Charge-Exchange Transitions on Neighbouring Nuclei in a Semi-Microscopic Model

NUCLEAR REACTIONS 91Zr(p, n), E=22.8, 28 MeV; 25,26Mg, 27Al(p, n), E=22.8 MeV; calculated σ(θ).

doi: 10.1016/0375-9474(78)90238-5
Citations: PlumX Metrics


1977LO16      Phys.Lett. 71B, 16 (1977)

R.G.Lovas

Fluctuations in the Lane Potential and (p, n) Transitions to Anti-Analogue States

NUCLEAR REACTIONS 48Ca, 40Ar, 54,56Fe, 58Ni(p, n);calculated delayed neutrons, potential.

doi: 10.1016/0370-2693(77)90728-6
Citations: PlumX Metrics


1976LO05      Nucl.Phys. A262, 356 (1976)

R.G.Lovas

On the Self-Consistency of the Lane Model

NUCLEAR REACTIONS 58Ni, 90Zr(p, ν-bar), E=22.8 MeV; 90Zr(n, n), E=14.1 MeV; calculated σ. Lane model.

doi: 10.1016/0375-9474(76)90626-6
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