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NSR database version of May 3, 2024.

Search: Author = R.da Silveira

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2018DA03 Phys.Rev. C 97, 034626 (2018)

R.da Silveira, Ch.Leclercq-Willain

Absorption effects in nuclear particle correlations

doi: 10.1103/PhysRevC.97.034626
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2013DA07 Phys.Rev. C 87, 067603 (2013)

R.da Silveira, Ch.Leclercq-Willain

Fraunhofer diffraction of coherent and incoherent nuclear matter waves by complementary screens

doi: 10.1103/PhysRevC.87.067603
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2011DA04 Phys.Rev. C 83, 044603 (2011)

R.da Silveira, Ch.Leclercq-Willain

Coulomb effects on edge scattering in elastic nuclear collisions

NUCLEAR REACTIONS ²⁸Si(¹²C, ¹²C), E=65, 186.4 MeV; ²⁸Si(¹⁶O, ¹⁶O), E=75, 1503 MeV; ²⁰⁸Pb(p-bar, p-bar), E=48.6 MeV; ⁴⁰Ca(p-bar, p-bar), E=179.8 MeV; analyzed experimental σ(θ) data for large to small Coulomb effects in nuclear elastic collisions. Optical model. Surface and shadow scattering.

doi: 10.1103/PhysRevC.83.044603
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2008DA03 Phys.Rev. C 77, 014602 (2008)

R.da Silveira, C.Leclercq-Willain

Separation of two partially coherent beams from their interference pattern

NUCLEAR REACTIONS ¹²C(¹²C, X), E(cm)=5 MeV; ¹⁴N(¹⁴N, X), E(cm)=5.49 MeV; analyzed σ(θ).

doi: 10.1103/PhysRevC.77.014602
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2004DA27 Phys.Rev. C 70, 044604 (2004)

R.da Silveira, Ch.Leclercq-Willain

Distinction between shadow and edge effects in heavy-ion elastic angular distributions

NUCLEAR REACTIONS ²⁸Si(¹⁶O, ¹⁶O), E=55, 75, 1503 MeV; ²⁸Si(¹²C, ¹²C), E=33.64, 65 MeV; analyzed σ(θ); deduced shadow and edge scattering effects.

doi: 10.1103/PhysRevC.70.044604
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2003LE25 Nucl.Phys. A722, 403c (2003)

Ch.Leclercq-Willain, R.da Silveira, M.Azzouz

Nuclear forward glory scattering with stable and unstable nuclei; how to deduce σ_r and f_N(0°)?

NUCLEAR REACTIONS ²⁸Si(¹²C, ¹²C), E=65 MeV; ²⁸Si(¹³C, ¹³C), E=60 MeV; ²⁸Si(¹⁶O, ¹⁶O), E=75 MeV; ¹²C(⁶He, ⁶He), E=5.9 MeV; ¹²C(⁶Li, ⁶Li), E=13 MeV; analyzed σ(θ); deduced parameters.

doi: 10.1016/S0375-9474(03)01397-6
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2000DA15 Eur.Phys.J. A 7, 503 (2000)

R.da Silveira, A.Boukour, Ch.Leclercq-Willain

On the Identification of the Nuclear Forward Glory in Heavy-Ion Scattering

NUCLEAR REACTIONS ²⁸Si(¹²C, ¹²C), E=65 MeV; ²⁸Si(¹³C, ¹³C), E=60 MeV; ²⁸Si(¹⁵N, ¹⁵N), E=85 MeV; ²⁸Si(¹⁶O, ¹⁶O), E=75 MeV; analyzed σ(θ); deduced forward glory scattering.

doi: 10.1007/s100500050423
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1997DA02 Phys.Rev. C55, 958 (1997); Erratum Phys.Rev. C56, 1656 (1997)

R.da Silveira, Ch.Leclercq-Willain

Possible Detection of Quantum-Mechanical Interferences between Gravitational Forces and Nucleus-Nucleus Coulomb Forces

NUCLEAR REACTIONS ²⁰⁸Pb(²⁰⁸Pb, X), E=5 MeV; calculated angular precision needed for detection of gravitational, nucleus-nucleus Coulomb forces interference.

doi: 10.1103/PhysRevC.55.958
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1995DA04 Phys.Rev. C51, 1572 (1995)

R.da Silveira, S.Klarsfeld, A.Boukour, Ch.Leclercq-Willain

Quantal Particle Flux and Nuclear Halo Effects

NUCLEAR REACTIONS ¹²C(¹¹Li, ¹¹Li), (¹¹C, ¹¹C), E=60 MeV/nucleon; ¹²C(¹⁶O, ¹⁶O), E=1503 MeV; calculated σ(θ); deduced halo effects related features. Refractive scattering, quantal particle flux.

doi: 10.1103/PhysRevC.51.1572
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1993DA09 Phys.Rev. C48, 468 (1993)

R.da Silveira, S.Klarsfeld, A.Boukour, Ch.Leclercq-Willain

Qualitative Behavior of Halo Nuclei Elastic Scattering Angular Distributions

NUCLEAR REACTIONS ¹²C(¹⁶O, ¹⁶O), E=1.503 GeV; ¹²C(¹¹Li, ¹¹Li), E=637 MeV; ¹²C(¹¹C, ¹¹C), E=620 MeV; calculated σ(θ); deduced nuclear attraction role.

doi: 10.1103/PhysRevC.48.468
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1991DA15 Phys.Lett. 264B, 248 (1991)

R.da Silveira

Forward-Backward Phase Relation in Elastic Diffractive Scattering

NUCLEAR REACTIONS ²⁰⁹Bi(n, n), E=7 MeV; Ca(n, n), E=14 MeV; ⁴⁰Ca(α, α), E=29 MeV; ²⁸Si(α, α), E=22.5 MeV; analyzed σ(θ); deduced forward-backward phase relation.

doi: 10.1016/0370-2693(91)90343-O
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1988DA12 Phys.Rev. C38, 543 (1988)

R.da Silveira, Ch.Leclercq-Willain

Spin Determination from the Angular Distributions of Identical Colliding Nuclei

NUCLEAR REACTIONS ¹⁴N(¹⁴N, ¹³N), E(cm)=9 MeV; ²⁴Mg(²⁴Mg, ²⁴Mg), E(cm)=17.37 MeV; calculated σ(θ); deduced spin dependent parameter. Envelope method.

doi: 10.1103/PhysRevC.38.543
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1987DA02 J.Phys.(London) G13, 149 (1987)

R.da Silveira, Ch.Leclercq-Willain

Nucleus-Nucleus Potential from the Scattering Data by Quasi-Classical Inversion

NUCLEAR REACTIONS ¹²C(¹⁶O, ¹⁶O), E=1503 MeV; calculated σ(θ); deduced optical potential. Quasiclassical inversion method.

doi: 10.1088/0305-4616/13/2/005
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1987DA17 J.Phys.(London) G13, 1061 (1987)

R.da Silveira, Ch.Leclercq-Willain

Interference Effects in Heavy-Ion Collions: Elastic-transfer in-phase rule

NUCLEAR REACTIONS ¹³⁸Ba(¹⁴C, ¹⁴C), (¹⁴C, ¹³C), E=64 MeV; ²⁰⁸Pb(¹¹B, ¹¹B), (¹¹B, ¹¹B'), (¹¹B, ¹²B), E=72.2 MeV; calculated σ(θ). Semi-classical approximation, phase rules.

doi: 10.1088/0305-4616/13/8/013
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1984DA10 J.Phys.(London) G10, L157 (1984)

R.da Silveira, Ch.Leclercq-Willain

A Refractive Phase Relation in Light-Composite-Particle-Nucleus Elastic and Inelastic Scattering at Intermediate Energies

NUCLEAR REACTIONS ⁵⁸Ni(α, α), (α, α'), E=140 MeV; calculated σ(θ); deduced refractive phase relation, multipolarity independence.

doi: 10.1088/0305-4616/10/7/002
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1983DA27 Z.Phys. A314, 63 (1983)

R.da Silveira, Ch.Leclercq-Willain

On the Separation of the Nuclear and Coulomb Rainbow Components from the Elastic Scattering Data

NUCLEAR REACTIONS ⁵⁸Ni(α, α), E=140 MeV; ⁴⁰Ca(α, α), E=104 MeV; analyzed σ(θ); deduced Coulomb, nuclear rainbow components, nuclear force induced refraction. Simple wave mechanical treatment.

1979BI01 Z.Phys. A290, 157 (1979)

R.Bimbot, D.Gardes, J.Cugnon, R.da Silveira

Simple Formulae for Heavy Ion Subcoulomb Transfer Probabilities. Application to One and Two-Proton Transfers in Bismuth

NUCLEAR REACTIONS ²⁰⁹Bi(¹⁴N, ¹³C), (¹⁴N, ¹²B), E=50-70 MeV; ²⁰⁹Bi(¹⁶O, ¹⁵N), (¹⁶O, ¹⁴C), E=70-80 MeV; ²⁰⁹Bi(¹⁹F, ¹⁸O), (¹⁹F, ¹⁷N), E=70-90 MeV; ²⁰⁹Bi(⁴⁰Ar, ³⁹Cl), (⁴⁰Ar, ³⁸S), E=150-170 MeV; ²⁰⁹Bi(⁴⁰Ca, ³⁹K), (⁴⁰Ca, ³⁸Ar), E=150-180 MeV; ²⁰⁹Bi(⁵⁷Fe, ⁵⁵Mn), (⁵⁶Fe, ⁵⁴Cr), E=200-230 MeV; ²⁰⁹Bi(⁶³Cu, ⁶²Ni), (⁶³Cu, ⁶¹Co), E=220-250 MeV; calculated σ(E). DWBA approach.

doi: 10.1007/BF01408110
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1979DA21 J.Phys.(Paris), Lett. 40, L-319 (1979)

R.da Silveira

Sur Une Classification Topologique des Courbes de Distribution de Masse des Fragments de Fission

NUCLEAR REACTIONS, Fission ¹⁹⁷Au(α, F), E=42 MeV; ²⁰⁹Bi(p, F), E=36, 56 MeV; ²²⁶Ra(p, F), E=11, 12.5, 15.5 MeV; ²²⁶Ra(d, F), E=19 MeV; ²³²Th(p, F), E=13, 20, 35, 45, 53 MeV; ²³⁹Pu(d, F), E=9.2, 12.3, 16.1, 17.9, 23.4 MeV; analyzed σ(fragment E, mass); deduced symmetric to asymmetric fission transition. Topological model, catastrophe theory.

doi: 10.1051/jphyslet:019790040014031900
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1978DA25 J.Phys.(Paris), Lett. 39, L-311 (1978)

R.Da Silveira

A Classical Inversion Procedure to Obtain the Real Part of the Heavy-Ion Optical Potential

NUCLEAR REACTIONS ⁵⁸Ni(¹⁶O, ¹⁶O), (¹⁶O, ¹⁶O'), E=60 MeV; measured σ(θ); deduced long range tail of real part of HI optical potential. Parameterization of classical deflection function.

doi: 10.1051/jphyslet:019780039018031100
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1976DA21 Nucl.Phys. A272, 208 (1976)

R.Da Silveira

Simple Determination of the Heavy-Ion Critical Angular Momentum from Both Elastic and Inelastic Data

NUCLEAR REACTIONS ²⁰⁸Pb(¹¹B, ¹¹B'), ⁹²Mo, ¹²⁰Sn(¹⁸O, ¹⁸O'), E=72 MeV; ¹⁴⁴Nd(¹²C, ¹²C'), E=70 MeV; ⁶⁴Ni(¹⁶O, ¹⁶O'), ⁵⁸Ni(¹⁸O, ¹⁸O'), E=50 MeV; ⁵⁸Ni(¹⁶O, ¹⁶O'), E=60 MeV; ⁴⁸Ca(¹⁶O, ¹⁶O), E=56 MeV; ²⁰⁸Pb(¹²C, ¹²C), E=96, 98 MeV; ²⁰⁸Pb(¹⁶O, ¹⁶O'), E=104, 170 MeV; ²⁰⁸Pb(¹⁴N, ¹⁴N), E=142 MeV; ⁴⁰Ca(³²S, ³²S'), E=100 MeV; ¹⁸¹Ta(¹²C, ¹²C), E=124 MeV; calculated angular momentum. Blair quarter-point recipe.