NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = L.C.Vaz Found 32 matches. 1990DE11 Phys.Rev. C41, R1885 (1990) P.A.DeYoung, C.J.Gelderloos, D.Kortering, J.Sarafa, K.Zienert, M.S.Gordon, B.J.Fineman, G.P.Gilfoyle, X.Lu, R.L.McGrath, D.M.de Castro Rizzo, J.M.Alexander, G.Auger, S.Kox, L.C.Vaz, C.Beck, D.J.Henderson, D.G.Kovar, M.F.Vineyard Particle-Particle Correlations and Lifetimes of Composite Nuclei: New tests for the evaporation model and for statistical equilibration NUCLEAR REACTIONS 27Al(16O, 2p), (16O, pd), E=80-250 MeV; measured pp-, pd-correlations; deduced evaporative decay T1/2. Statistical model.
doi: 10.1103/PhysRevC.41.R1885
1989DE02 Phys.Rev. C39, 128 (1989) P.A.DeYoung, M.S.Gordon, Xiuqin Lu, R.L.McGrath, J.M.Alexander, D.M.de Castro Rizzo, L.C.Vaz Emission Times in Low-Energy Heavy-Ion Reactions by Particle-Particle Correlations NUCLEAR REACTIONS 27Al(16O, 2p), (16O, 2α), E=140 MeV; measured pp, αα correlations; deduced successive proton emission interval T1/2, (αα) correlations problematics.
doi: 10.1103/PhysRevC.39.128
1989PE01 Phys.Rev. C39, 488 (1989) G.F.Peaslee, N.N.Ajitanand, J.M.Alexander, R.Lacey, L.C.Vaz, M.Kaplan, M.Kildir, D.J.Moses, D.Logan, M.S.Zisman Particle-Particle Coincidence Measurements for 1,2,3H and 4He in the Reaction 480 MeV 56Fe + (nat)Ag NUCLEAR REACTIONS Ag(56Fe, pX), (56Fe, dX), (56Fe, tX), (56Fe, αX), E=480 MeV; measured (particle)(particle)-coin; deduced average particle multiplicities, energy removed, effective emission barriers.
doi: 10.1103/PhysRevC.39.488
1988LA12 Phys.Rev. C37, 2540 (1988) R.Lacey, N.N.Ajitanand, J.M.Alexander, D.M.de Castro Rizzo, G.F.Peaslee, L.C.Vaz, M.Kaplan, M.Kildir, G.La Rana, D.J.Moses, W.E.Parker, D.Logan, M.S.Zisman, P.DeYoung, L.Kowalski Mechanisms for Light Charged Particle Emission in the Reactions 247 and 337 MeV 40Ar + (nat)Ag NUCLEAR REACTIONS Ag(40Ar, pX), (40Ar, dX), (40Ar, tX), (40Ar, αX), (40Ar, X), E=247, 337 MeV; measured σ(θ), σ(Eα, θα); deduced pre-, post scission emission multiplicities. Deformed emitters.
doi: 10.1103/PhysRevC.37.2540
1988LA13 Phys.Rev. C37, 2561 (1988) R.Lacey, N.N.Ajitanand, J.M.Alexander, D.M.de Castro Rizzo, G.F.Peaslee, L.C.Vaz, M.Kaplan, M.Kildir, G.La Rana, D.J.Moses, W.E.Parker, D.Logan, M.S.Zisman, P.DeYoung, L.Kowalski Large-Angle Correlations between 4He and 1,2,3H or 4He in the Reactions 247 and 337 MeV 40Ar + (nat)Ag: Unexpected properties of the nuclear stratosphere NUCLEAR REACTIONS Ag(40Ar, αX), E=247, 337 MeV; measured α(light fragment)-coin, energy correlations; deduced emission source properties, mechanism.
doi: 10.1103/PhysRevC.37.2561
1988PE16 Phys.Rev. C38, 1730 (1988) G.F.Peaslee, N.N.Ajitanand, J.M.Alexander, D.Guerreau, R.Lacey, L.C.Vaz, M.Kaplan, M.Kildir, D.J.Moses, D.Logan, M.S.Zisman Sources of Light-Charged-Particle Emission in the Reaction 480 MeV 56Fe + (nat)Ag NUCLEAR REACTIONS Ag(56Fe, pX), (56Fe, dX), (56Fe, tX), (56Fe, αX), E=480 MeV; measured σ(fragment θ), σ(E(X), θ(X)) for X=p, d, t, α; deduced reaction, particle emission mechanisms.
doi: 10.1103/PhysRevC.38.1730
1987LA13 Phys.Lett. 191B, 253 (1987) R.Lacey, N.N.Ajitanand, J.M.Alexander, D.M.De Castro Rizzo, P.DeYoung, M.Kaplan, L.Kowalski, G.La Rana, D.Logan, D.J.Moses, W.E.Parker, G.F.Peaslee, L.C.Vaz Surprising Properties of the Nuclear Stratosphere Indicated by Energy Spectra and Large-Angle Correlations between 4He and 1,2,3H or 4He NUCLEAR REACTIONS Ag(40Ar, pα), (40Ar, dα), (40Ar, tα), (40Ar, 2α), E=337 MeV; measured σ(Eα, θα), αp-, αd-, αt-, αα-coin. Gas ionization, solid state Si telescopes. Theoretical calculations.
doi: 10.1016/0370-2693(87)90250-4
1987MO05 Nucl.Phys. A465, 339 (1987) D.J.Moses, M.Kaplan, M.Kildir, D.R.G.Logan, G.La Rana, W.E.Parker, R.Lacey, G.F.Peaslee, J.M.Alexander, N.N.Ajitanand, L.C.Vaz, M.S.Zisman Light Charged Particle Emission in 485 MeV 56Fe + 197Au Reactions: Correlations with heavy fragments and relationships to spin and lifetime NUCLEAR REACTIONS 197Au(56Fe, X), (56Fe, F), E=485 MeV; measured σ(Eα, θα, fragment θ), σ(Ep), σ(Eα), σ(Ep, θp, fragment θ) following fission, deep inelastic scattering; deduced evaporative light-particle multiplicities for each emission source. 252Db deduced T1/2.
doi: 10.1016/0375-9474(87)90438-6
1986AJ03 Phys.Rev. C34, 877 (1986) N.N.Ajitanand, G.La Rana, R.Lacey, D.J.Moses, L.C.Vaz, G.F.Peaslee, D.M.de Castro Rizzo, M.Kaplan, J.M.Alexander Clues to the Shapes of very Hot Nuclei: Calculated patterns for evaporative emission from deformed nuclei NUCLEAR REACTIONS 197Au(56Fe, X), E=485 MeV; 27Al(40Ar, X), E=190 MeV; calculated evaporative <Eα>, anisotropies; deduced nuclear shape dependences.
doi: 10.1103/PhysRevC.34.877
1986VA20 Z.Phys. A324, 331 (1986) L.C.Vaz, J.M.Alexander, N.Carjan Comparison of Semiclassical and Quantum Mechanical Angular Distributions for Nuclear Fission and Evaporation NUCLEAR REACTIONS 56Fe(α, αX), E=17 MeV; 159Tb(22Ne, αX), E=60, 176 MeV; calculated evaporation α-anisotropy. 248Cm(32S, F), E=218 MeV; calculated fission fragment anisotropy. Semi-classical, quantum mechanical methods.
1985MO04 Z.Phys. A320, 229 (1985) D.J.Moses, M.Kaplan, J.M.Alexander, D.Logan, M.Kildir, L.C.Vaz, N.N.Ajitanand, E.Duek, M.S.Zisman Particle Spectra from Reversed Kinematics: Powerful probes of hot rotating nuclei NUCLEAR REACTIONS 12C(40Ar, pX), (40Ar, αX), (56Fe, pX), (56Fe, αX), (86Kr, pX), (86Kr, αX), E=8.5 MeV/nucleon; measured inclusive σ(θ, Ep), σ(θ, Eα); deduced effective evaporation emission, fusion barriers. Hot spot, moving source model.
doi: 10.1007/BF01881270
1984AJ02 Z.Phys. A316, 169 (1984) N.N.Ajitanand, J.M.Alexander, H.Delagrange, E.Duek, D.O.Eriksen, D.Guerreau, M.Kaplan, M.Kildir, L.Kowalski, R.Lacey, D.Logan, D.J.Moses, G.F.Peaslee, L.C.Vaz, M.S.Zisman Multiplicities for Evaporative 4He Emission in Heavy Ion Reactions: Relationships to spin and lifetime expectancy of the composite nucleus NUCLEAR REACTIONS Ag, 238U(40Ar, αX), (56Fe, αX), (40Ar, αF), (56Fe, αF), E=8.5 MeV/nucleon; measured σ(fragment θ, θα, Eα), fission-fusion, projectile-like fragment-coin; deduced reaction mechanism, hot nucleus thermodynamic properties.
doi: 10.1007/BF01412259
1984DU09 Z.Phys. A317, 83 (1984) E.Duek, N.N.Ajitanand, J.M.Alexander, D.Logan, M.Kildir, L.Kowalski, L.C.Vaz, D.Guerreau, M.S.Zisman, M.Kaplan, D.J.Moses Mechanisms for Emission of 4He in the Reactions of 334 MeV 40Ar with 238U NUCLEAR REACTIONS 238U(40Ar, αF), E=334 MeV; measured fission (fragment)(fragment)(α)-coin, σ(θα, Eα); deduced fission, α-emission mechanisms.
doi: 10.1007/BF01420452
1984KI07 Z.Phys. A317, 291 (1984) M.Kildir, D.Logan, D.O.Eriksen, D.J.Moses, M.Kaplan, E.Duek, L.C.Vaz, N.N.Ajitanand, J.M.Alexander, M.S.Zisman Fission Reactions of 468-MeV 56Fe + 238U: Detection of 4He/1H Emission from Pre- and Post-Fission Sources NUCLEAR REACTIONS 238U(56Fe, pF), (56Fe, αF), E=469 MeV; measured fission (fragment)(fragment)(θ), σ(θp, Ep, fragment θ), σ(θα, Eα, fragment θ), proton, α differential multiplicities, σ(θα, Eα); deduced light particle emission mechanism.
doi: 10.1007/BF01438361
1984VA01 Phys.Rev.Lett. 52, 396 (1984) Fission Anisotropies and Sequential Fission NUCLEAR REACTIONS 238U(16O, F), E=110, 130, 148 MeV; calculated fission σ following fusion, fissile nucleus maximum spin, moment of inertia ratios. Reanalysis of data.
doi: 10.1103/PhysRevLett.52.396
1984VA05 Z.Phys. A315, 169 (1984) L.C.Vaz, D.Logan, E.Duek, J.M.Alexander, M.F.Rivet, M.S.Zisman, M.Kaplan, J.W.Ball Fission and Emission of H and He in the Reactions of 215 MeV 16O with 181Ta, 208Pb and 238U NUCLEAR REACTIONS 12C, 181Ta, 208Pb, 238U(16O, pX), (16O, αX), E=215 MeV; 181Ta, 208Pb, 238U(16O, dX), (16O, tX), E=215 MeV; measured inclusive σ(Ep), σ(Eα), σ(Ed), σ(Et), σ(θ), σ(θ, Ep), σ(θ, Eα). 209Bi, 238U(16O, F), E=215 MeV; measured fission σ; deduced evaporative emission effective barriers.
doi: 10.1007/BF01419376
1984VA26 Z.Phys. A318, 231 (1984) Empirical and Theoretical Fusion Barriers for 1H and 4He: Connections to evaporation from hot nuclei NUCLEAR REACTIONS, ICPND 59Co, 94Zr(p, X), E(cm)=2-6 MeV; 116Cd, 139La(p, X), E(cm)=2-8 MeV; 98Mo, 119Sn(p, X), E(cm) ≈ 2.5-7 MeV; 103Rh(p, X), E(cm)=2-12 MeV; 233U(p, X), E(cm)=5-13 MeV; 40Ca(α, X), E(cm) ≈ 5-19 MeV; 48Ti(α, X), E(cm) ≈ 5-8 MeV; 51V(α, X), E(cm)=6-10 MeV; 59Co(α, X), E(cm) ≈ 8-20 MeV; 164Dy(α, X), E(cm) ≈ 15-25 MeV; 208Pb(α, X), E(cm) ≈ 17-21 MeV; 209Bi(α, X), E(cm) ≈ 16-20 MeV; 233U(α, X), E(cm)=18-30 MeV; calculated fusion σ(E); deduced projectile fusion barriers. 181Ta(16O, α), E=215 MeV; 56Fe(12C, p), E=480 MeV; calculated evaporation σ(θα, Eα), σ(θp, Ep).
doi: 10.1007/BF01413474
1983DU14 Phys.Lett. 131B, 297 (1983) E.Duek, N.N.Ajitanand, J.M.Alexander, D.Logan, M.Kildir, L.Kowalski, L.C.Vaz, D.Guerreau, M.S.Zisman, M.Kaplan New Probe of Interediate Reaction Times: Near-Scission Emission of 4He for 334 MeV 40Ar + 238U NUCLEAR REACTIONS 238U(40Ar, αX), (40Ar, αF), E= 334 MeV; measured α(fragment)-coin following fusion, fission; deduced fragment, composite nucleus evaporation upper limit, near scission role.
doi: 10.1016/0370-2693(83)90502-6
1983VA10 Z.Phys. A311, 89 (1983) L.C.Vaz, D.Logan, J.M.Alexander, E.Duek, D.Guerreau, L.Kowalski, M.F.Rivet, M.S.Zisman Products of 3 ≤ Z ≤ 9 from Long-Lived Intermediates in the Reactions 336 MeV 40Ar + Ag, 154Sm and Au NUCLEAR REACTIONS 107,109Ag, 197Au, 154Sm(40Ar, 7Li), (40Ar, 9Be), (40Ar, 11B), (40Ar, 12C), (40Ar, 14N), (40Ar, 16O), (40Ar, 19F), E=336 MeV; measured σ(fragment θ), σ(fragment θ, E); deduced fission σ, σ(evaporation residue), σ(fusion), σ(reaction). 149Tb, 194Hg deduced effective emission barriers, rms spin values. Semi-classical analysis.
doi: 10.1007/BF01411611
1983VA17 Z.Phys. A312, 163 (1983) A Reconsideration of Fission Fragment Angular Distributions from Nuclei of High Spin NUCLEAR REACTIONS 197Au, 209Bi(20Ne, F), E=220 MeV; 238U(16O, F), E=90-148 MeV; 208Pb(32S, F), E=185-225 MeV; 238U(40Ar, F), E=340 MeV; analyzed fission fragment anisotropy data; deduced effective moment of inertia, other fission parameters. Standard rigid rotor theory, limitations discussed.
doi: 10.1007/BF01412159
1982AL26 Z.Phys. A307, 149 (1982) J.M.Alexander, H.Delagrange, M.Rajagopalan, M.F.Rivet, L.C.Vaz Anomalous Behavior of Evaporative H/He from 194Hg Compound Nuclei NUCLEAR REACTIONS 174Yb(20Ne, xp), (20Ne, xα), E=252 MeV; 154Sm(40Ar, xp), (40Ar, xα), E=340 MeV; analyzed σ(evaporation) data. 194Hg deduced decay energy, spin dependence, mechanism. Bohr's independence hypothesis.
doi: 10.1007/BF01414829
1982KI06 Z.Phys. A306, 323 (1982) M.Kildir, D.Logan, M.Kaplan, M.S.Zisman, D.Guerreau, J.M.Alexander, L.C.Vaz Studies of 4He Emission in Both Fusion-Like and Inelastic Reactions of 340-MeV 40Ar + 238U NUCLEAR REACTIONS 238U(40Ar, αF), E=340 MeV; measured σ(θα, Eα), (fragment)(fragment)α-coin; deduced fusion-fission, sequential fission induced direct, evaporation α emission.
doi: 10.1007/BF01432373
1982RA06 Phys.Rev. C25, 2417 (1982) M.Rajagopalan, D.Logan, J.W.Ball, M.Kaplan, H.Delagrange, M.F.Rivet, J.M.Alexander, L.C.Vaz, M.S.Zisman Charged Particle Emission from 194Hg Compound Nuclei: Energy and spin dependence of fission-evaporation competition NUCLEAR REACTIONS, ICPND 182W(12C, F), (12C, p), (12C, d), (12C, t), (12C, α), E=77-167 MeV; 175Lu(19F, F), (19F, p), (19F, d), (19F, t), (19F, α), E=135, 184 MeV; 174Yb(20Ne, F), (20Ne, p), (20Ne, d), (20Ne, t), (20Ne, α), E=125, 252 MeV; 154Sm(40Ar, F), (40Ar, p), (40Ar, d), (40Ar, t), (40Ar, α), E=196-340 MeV; measured σ(E), fission σ, fusion σ, evaporation residue σ vs E; deduced reaction mechanism. 194Hg deduced fission, evaporation competition spin, energy dependences. Statistical model.
doi: 10.1103/PhysRevC.25.2417
1979DE38 Phys.Rev. C20, 1731 (1979) H.Delagrange, L.C.Vaz, J.M.Alexander Optical Model Analysis for 16O + 208Pb: Evidence for Dynamic Shape or Density Changes NUCLEAR REACTIONS 208Pb(16O, X), E=80-102 MeV; analyzed fusion, reaction data. 208Pb(16O, 16O), E=80-313 MeV; analyzed σ(θ); deduced dynamical shape or density adjustment during collision. Optical potential, proximity formulation.
doi: 10.1103/PhysRevC.20.1731
1978VA10 Phys.Rev. C18, 820 (1978) L.C.Vaz, J.M.Alexander, E.H.Auerbach Classical, Semiclassical, and Quantum Mechanical Calculations for Scattering and Reactions of 16O + 208Pb NUCLEAR REACTIONS 208Pb(16O, X), (16O, 16O), E=80-192 MeV; calculated σ(θ).
doi: 10.1103/PhysRevC.18.820
1978VA11 Phys.Rev. C18, 833 (1978) Elastic Scattering and Total Reaction Cross Sectons: Refractive Scattering or Strong Absorption NUCLEAR REACTIONS 108Ag(14N, 14N), E=113 MeV; 28Si(16O, 16O), E=81 MeV; 208Pb(20Ne, 20Ne), E=161.2 MeV; 27Al(32S, 32S), E=110 MeV; 60Ni(16O, 16O), E=61.4 MeV; calculated σ(θ).
doi: 10.1103/PhysRevC.18.833
1974AL21 Phys.Rev.Lett. 33, 1487 (1974) J.M.Alexander, L.C.Vaz, S.Y.Lin Static Nuclear Deformation and the Total Reaction Cross Section NUCLEAR REACTIONS 208Pb, 209Bi, 233U, 237Np(α, X), E=16-22 MeV; calculated total σ.
doi: 10.1103/PhysRevLett.33.1487
1974VA14 Phys.Rev. C10, 464 (1974) Systematics of Reaction Cross Sections and Interaction Barriers for Charged Particles COMPILATION Z=8-92; compiled interaction barrier parameters.
doi: 10.1103/PhysRevC.10.464
1972LU03 Nucl.Phys. A190, 229 (1972) Level Densities from Spectra of Different Reactions Populating the Same Nucleus NUCLEAR REACTIONS 59Co, 62Ni, 63,65Cu(p, p'), (p, α), E approx 12 MeV; 56Fe, 59Co, 60,62Ni(α, p), (α, α'), E approx 16 MeV; 63,65Cu(α, α'), E=17 MeV; measured, calculated σ(Eα'), σ(Eα), σ(Ep'), σ(Ep). 56Fe, 59Co, 60Ni, 62Ni, 63Cu, 65Cu deduced level density parameters. Isotopically separated targets.
doi: 10.1016/0375-9474(72)90139-X
1972LU09 Nucl.Phys. A197, 321 (1972) Spin Distribution of the Nuclear Level Density Near A = 60 NUCLEAR REACTIONS 56Fe(α, α'), 59Co(α, α'), 60Ni(α, α'), 62Ni(α, α'), 63Cu(α, α'), E=17.0 MeV; 60Ni(α, p), , 62Ni(α, p), E=16.5, 16.2 MeV; measured σ(Eα', θ), σ(Ep, θ). 56Fe, 59Co, 60,62Ni, 63,65Cu deduced spin cut-off factors. Isotopically separated targets.
doi: 10.1016/0375-9474(72)91014-7
1972VA03 Phys.Rev. C5, 463 (1972) Isospin and the Bohr Independence Hypothesis NUCLEAR REACTIONS 63Cu(p, p'), (p, α), E=12 MeV; 60Ni(α, α'), (α, p), E=16.6 MeV; measured σ(Ep'), σ(Eα), σ(Eα'), σ(Ep), σ ratios.
doi: 10.1103/PhysRevC.5.463
1972VA31 Phys.Rev. C6, 1896 (1972) Level Densities from Analysis of Particle Spectra
doi: 10.1103/PhysRevC.6.1896
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