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Search: Author = J.B.Martins

Found 32 matches.

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1993TA05      J.Phys.(London) G19, 805 (1993)

O.A.P.Tavares, J.B.Martins, E.de Paiva, E.L.Moreira, J.L.Vieira, M.L.Terranova, M.Capogni, L.Casano, A.D'Angelo, D.Moricciani, F.Ghio, B.Girolami, D.Babusci

Fission Induced in (nat)Ta, (nat)W and (nat)Pt Targets by 69 MeV Monochromatic Photons

NUCLEAR REACTIONS Ta, W, Pt(γ, F), E=69 MeV; measured fission σ; deduced fissility, absolute photofission σ.

doi: 10.1088/0954-3899/19/5/014
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0380.

1993TA18      J.Phys.(London) G19, 2145 (1993)

O.A.P.Tavares, J.B.Martins, E.L.Moreira, M.L.Terranova, M.Capogni, L.Casano, A.D'Angelo, D.Moricciani, C.Schaerf, B.Girolami, F.Ghio, D.Babusci

Fission of 27Al Nucleus by 69 MeV Monochromatic Photons

NUCLEAR REACTIONS 27Al(γ, F), E=69 MeV; measured absolute fission σ, fissility. 154Sm, 174Yb(γ, F), E=69 MeV; analyzed absolute fission σ, fissility data. Monochromatic photon beam, plastic track detectors. Two-step model, other data discussed.

doi: 10.1088/0954-3899/19/12/017
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0665.

1992MA56      Nuovo Cim. 105A, 1621 (1992)

J.B.Martins, M.L.Terranova, M.M.Correa

Half-Life for Alpha-Decay of 147Sm

RADIOACTIVITY 147Sm(α); measured T1/2. Gran Sasso underground laboratory, cosmic-ray neutron free conditions, CR-39 plate detectors.

doi: 10.1007/BF02731075
Citations: PlumX Metrics

1992TE01      Nuovo Cim. 105A, 197 (1992)

M.L.Terranova, A.D'Angelo, J.D.Pinheiro-Filho, E.S.de Almeida, E.Z.Bilbao, J.B.Martins

Fission Yields of 209Bi and (nat)Pb Nuclei Induced by Photon Beams of 226 MeV Maximum Energy from Compton Backscattered Laser Light

NUCLEAR REACTIONS, ICPND 209Bi, Pb(γ, F), E=226 MeV; measured fission yields. Quasi-monochromatic beam, makrofol plates as solid-state detectors.

doi: 10.1007/BF02826028
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0502.

1991MA22      Phys.Rev. C44, 354 (1991)

J.B.Martins, E.L.Moreira, O.A.P.Tavares, J.L.Vieira, L.Casano, S.D'Angelo, C.Schaerf, M.L.Terranova, D.Babusci, B.Girolami

Absolute Photofission Cross Section of 197Au, (nat)Pb, 209Bi, 232Th, 238U, and 235U Nuclei by 69-MeV Monochromatic and Polarized Photons

NUCLEAR REACTIONS, ICPND 197Au, Pb, 209Bi, 232Th, 235,238U(polarized γ, F), E=69 MeV; measured fission σ(E). 197Au, 208Pb, 209Bi, 235,238U, 232Th deduced nuclear fissility. Other data input. Nuclear-track detectors, monochromatic beam. Quasi-deuteron photoabsorption, evaporation-fission competition models.

doi: 10.1103/PhysRevC.44.354
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0388.

1991TA15      Phys.Rev. C44, 1683 (1991)

O.A.P.Tavares, M.L.Terranova, L.Casano, S.D'Angelo, D.Moricciani, C.Schaerf, D.Babusci, B.Girolami, J.B.Martins, E.L.Moreira, J.L.Vieira

Fission of Complex Nuclei Induced by 52-MeV Monochromatic and Polarized Photons

NUCLEAR REACTIONS 232Th, 235,238U(polarized γ, F), E=52 MeV; measured absolute fission σ(E). 237Np, 209Bi, 208Pb, 174Yb(γ, F), E not given; analyzed fission data. 237Np, 235,238U, 232Th, 209Bi, 208Pb, 174Yb deduced fissility. Monochromatic photons, nuclear-track detectors. Quasi-deuteron photoabsorption, evaporation-fission competition models.

doi: 10.1103/PhysRevC.44.1683
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0387.

1991TE04      Nuovo Cim. 104A, 1429 (1991)

M.L.Terranova, J.D.Pinheiro Filho, E.S.De Almeida, J.B.Martins, O.A.P.Tavares

Analysis of Fission and Fragmentation Events Produced in Ag and Br Nuclei by Interaction of Bremsstrahlung Beams in the Energy Range (1.0-5.5) GeV

NUCLEAR REACTIONS Ag, Br(γ, F), (γ, X), E=1-5.5 GeV bremsstrahlung; measured fission, fragmentation product σ(θ), (fragment)(fragment)(θ); deduced mean σ per photon, fissilities.

doi: 10.1007/BF02817425
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0568.

1990DE17      Nuovo Cim. 103A, 701 (1990)

D.A.De Lima, J.B.Martins, O.A.P.Tavares

Fission of Al, Ti, Co, Zr, Nb, Ag, In, Nd, Sm and Ta Nuclei Induced by (0.8 - 1.8) GeV Photons

NUCLEAR REACTIONS, ICPND 27Al, Ti, 59Co, Zr, 93Nb, Ag, In, Nd, Sm, Ta(γ, F), E=0.8-1.8 GeV bremmsstrahlung; measured photofission yields; deduced fissility. Solid state track detectors.

doi: 10.1007/BF02789022
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0569.

1989FO05      Radiochim.Acta 46, 57 (1989)

M.Foshina, J.B.Martins, O.A.P.Tavares, V.Di Napoli

Systematics of Photon- and Electron-Induced Spallation Reactions

NUCLEAR REACTIONS 51V(γ, X), E=0.075-5 GeV bremsstrahlung; 55Mn(γ, X), E=0.3-5 GeV bremsstrahlung; 59Co, Fe(γ, X), E=0.3-1.5 GeV bremsstrahlung; Cu(γ, X), E=0.32-5 GeV bremsstrahlung; 75As, Ga(γ, X), E=0.320 GeV; calculated fragment yield distributions. Semi-empirical four parameter formula.

1989MA36      Nuovo Cim. 101A, 789 (1989)

J.B.Martins, E.L.Moreira, O.A.P.Tavares, J.L.Vieira, J.D.Pinheiro Filho, R.Bernabei, S.d'Angelo, M.P.De Pascale, C.Schaerf, B.Girolami

Nuclear Fission of 197Au, (nat)Pb and 209Bi Induced by Polarized and Monochromatic Photons of 60 and 64 MeV

NUCLEAR REACTIONS 197Au, Pb, 209Bi(γ, F), (polarized γ, F), E=60, 64 MeV; measured fission σ, fissionability. 197Au, 208Pb, 209Bi deduced first chance fission probability.

doi: 10.1007/BF02844870
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0402.

1988BE37      Nuovo Cim. 100A, 131 (1988)

R.Bernabei, V.C.De Oliveira, J.B.Martins, O.A.P.Tavares, J.D.Pinheiro Filho, S.D'Angelo, M.P.De Pascale, C.Schaerf, B.Girolami

Photofission Cross-Section of 238U in the Quasi-Deuteron Region

NUCLEAR REACTIONS 238U(γ, F), E=46-72 MeV; measured fission σ(E).

doi: 10.1007/BF02902646
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0407.

1986DE32      Phys.Rev. C34, 2261 (1986)

H.G.de Carvalho, J.B.Martins, O.A.P.Tavares

Radioactive Decay of Radium and Radon Isotopes by 14C Emission

RADIOACTIVITY 220,221,222,223,224,225,226,228Ra, 217,218,219,220,221,222,223Rn(14C); calculated T1/2; deduced branching ratios.

doi: 10.1103/PhysRevC.34.2261
Citations: PlumX Metrics

1984FO22      Radiochim.Acta 35, 121 (1984)

M.Foshina, J.B.Martins, O.A.P.Tavares, V.di Napoli

Systematics of Spallation Yields with a Four-Parameter Formula

NUCLEAR REACTIONS 51V(p, X), E=0.06-29 GeV; 55Mn(p, X), E=170 MeV; 56Fe(p, X), E=0.34-29 GeV; 59Co(p, X), E=370 MeV; Cu(p, X), E=0.34-24 GeV; 75As(p, X), E=0.49-29 GeV; 93Nb(p, X), E=0.5-0.72 GeV; calculated spallation yields, fragment charge, mass yield distributions; deduced model parameters. Semi-empirical four-parameter formula.

1982DE22      Nucl.Instrum.Methods 197, 417 (1982)

H.G.De Carvalho, J.B.Martins, E.L.Medeiros, O.A.P.Tavares

Decay Constant for the Spontaneous-Fission Process in 238U

RADIOACTIVITY, Fission 238U(SF); measured decay constant. Etched track technique.

doi: 10.1016/0167-5087(82)90337-4
Citations: PlumX Metrics

1979DI09      J.Inorg.Nucl.Chem. 41, 895 (1979)

V.di Napoli, M.L.Terranova, J.B.Martins, J.D.Pinheiro Filho, O.A.P.Tavares

Intermediate-Energy Isomeric Ratios of Some Photospallation Residuals From Targets in the Vanadium-Cobalt Region

NUCLEAR REACTIONS 51V, 55Mn, Fe, Co(γ, xnyp), E=0.3-1 GeV; measured production σ for 44Sc, 34Cl, 54Mn.

doi: 10.1016/0022-1902(79)80290-0
Citations: PlumX Metrics

1978DI02      Lett.Nuovo Cim. 21, 83 (1978)

V.di Napoli, M.L.Terranova, J.B.Martins, O.A.P.Tavares

A Modified Mass Yield Formula for Intermediate-Energy Photospallation Of Medium-Weight Nuclei

NUCLEAR REACTIONS 39K, 40Ca, 51V, 55Mn, Fe, 59Co, Cu(γ, X); calculated yields of 24Na.

doi: 10.1007/BF02762793
Citations: PlumX Metrics

1978DI03      J.Inorg.Nucl.Chem. 40, 175 (1978)

V.di Napoli, F.Salvetti, M.L.Terranova, H.G.de Carvalho, J.B.Martins, O.A.P.Tavares

Photodisintegration of Light and Medium Weight Nuclei at Intermediate Energies-III

NUCLEAR REACTIONS 51V, 55Mn, 59Co, Fe(γ, X), E=0.3-1.0 GeV; measured σ(E, A, Z).

doi: 10.1016/0022-1902(78)80106-7
Citations: PlumX Metrics

1978DI06      J.Inorg.Nucl.Chem. 40, 1619 (1978)

V.di Napoli, J.B.Martins, G.Rosa, F.Salvetti, O.A.P.Tavares, M.L.Terranova, H.G.de Carvalho

Photodisintegration of Light and Medium-Weight Nuclei at Intermediate Energies-IV. Photoproduction of 7Be and 11C from Targets with Masses up to 40

NUCLEAR REACTIONS 19F, 27Al, 28Si, 32S, 10,11B(γ, 7Be), 19F, 27Al, 28Si, 32S, 14N, 16O(γ, 11C), E=0.3-1.0 GeV; measured σ(E).

doi: 10.1016/0022-1902(78)80336-4
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0965.

1978DI12      Lett.Nuovo Cim. 23, 424 (1978)

V.Di Napoli, M.L.Terranova, J.B.Martins, J.D.Pinheiro Filho, O.A.P.Tavares

Ineffectiveness of the Quasi-Deuteron Mechanism of Interaction in Yielding (γ, Nucleon) Reactions on Complex Nuclei

NUCLEAR REACTIONS 9Be, 14N, 30Si, 40Ca, 75As, 127I, 209Bi(γ, n), (γ, p), (γ, np); calculated σ. Levinger quasi-deuteron model. Valid up to 150 MeV.

doi: 10.1007/BF02787003
Citations: PlumX Metrics

1977DI16      J.Inorg.Nucl.Chem. 39, 1727 (1977)

V.di Napoli, M.L.Terranova, H.G.de Carvalho, J.B.Martins, J.D.Pinheiro Filho, O.A.P.Tavares

Cross Sections of (γ, nn) Reactions in Complex Nuclei at Intermediate Energies

NUCLEAR REACTIONS 209Bi, 59Co(γ, 3n), (γ, 4n), 209Bi(γ, 2n), 51V(γ, 3n), E=0.3-1.0 GeV bremsstrahlung; measured σ(E). 9Be, 12C, 16O, 59Co, 103Rh, 127I, 197Au, 209Bi(γ, 2n), 51V, 59Co, 75As, 89Y, 127I, 197Au, 209Bi(γ, 3n), 55Mn, 59Co, 75As, 127I, 209Bi(γ, 4n); calculated σ.

doi: 10.1016/0022-1902(77)80191-7
Citations: PlumX Metrics

1976DI01      J.Inorg.Nucl.Chem. 38, 1 (1976)

V.di Napoli, G.Rosa, F.Salvetti, M.L.Terranova, H.G.de Carvalho, J.B.Martins, O.A.P.Tavares

Photodisintegration of Light and Medium-Weight Nuclei at Intermediate Energies-II

NUCLEAR REACTIONS 40Ca(γ, 7Be), (γ, 11C), E=0.3-1.0 GeV bremsstrahlung ; measured σ(E); deduced reaction mechanism.

doi: 10.1016/0022-1902(76)80038-3
Citations: PlumX Metrics

1976MA62      Lett.Nuovo Cim. 15, 364 (1976)

J.B.Martins, O.A.P.Tavares, M.L.Terranova, V.di Napoli

Some Remarks on 13N Photoproduction from 16O and 19F at Intermediate Energies

NUCLEAR REACTIONS 16O(γ, 2np), 19F(γ, 4n2p), E=0.3-1 GeV; measured σ.

doi: 10.1007/BF02725898
Citations: PlumX Metrics

1975DE34      Lett.Nuovo Cim. 14, 615 (1975)

H.G.de Carbalho, J.B.Martins, O.A.P.Tavares, V.di Napoli, M.L.Terranova, K.Tesch

Photofission Cross-Sections of 209Bi, 232Th and 238U Above 1 GeV

NUCLEAR REACTIONS 209Bi(γ, F), E=1-16 GeV; 232Th, 238U(γ, F), E=1-5.5 GeV; measured σ.

doi: 10.1007/BF02743343
Citations: PlumX Metrics

1975DI03      J.Inorg.Nucl.Chem. 37, 1101 (1975)

V.di Napoli, G.Rosa, F.Salvetti, M.L.Terranova, H.G.de Carvalho, J.B.Martins, O.A.P.Tavares

Photodisintegration of Light and Medium-Weight Nuclei at Intermediate Energies. I. Photoproduction of 18F, 22Na, and 24Na from Targets with Masses up to 40

NUCLEAR REACTIONS 23Na, 27Al, 28Si, 31P, 32S, 35,37Cl, 39K, 40Ca(γ, X), E=0.3-1 GeV bremsstrahlung; measured photoproduction cross sections for 18F, 22,24Na.

doi: 10.1016/0022-1902(75)80451-9
Citations: PlumX Metrics

1974DI13      Lett.Nuovo Cim. 11, 179 (1974)

V.di Napoli, J.B.Martins, G.Persichelli, M.L.Terranova

On the Isomeric-Yield Ratio of 52Mn-g and 52Mn-m Photoproduction from 55Mn at Intermediate Energies

NUCLEAR REACTIONS 55Mn(γ, 3nγ), E=0.3-1 MeV; measured Eγ, σ. 52,52mMn deduced isomeric yield ratio.

doi: 10.1007/BF02820383
Citations: PlumX Metrics

1973DI05      J.Inorg.Nucl.Chem. 35, 1419 (1973)

V.di Napoli, A.M.Lacerenza, F.Salvetti, S.M.Terenzi, H.G.de Carvalho, J.B.Martins

Photoproduction of 18F from 27Al at Energies between 0.3 and 1 GeV

NUCLEAR REACTIONS 27Al(γ, 4p5n), E=0.3-1.0 GeV; measured σ(E).

doi: 10.1016/0022-1902(73)80227-1
Citations: PlumX Metrics

1973DI09      Phys.Rev. C8, 206 (1973)

V.di Napoli, F.Salvetti, M.L.Terranova, H.G.de Carvalho, J.B.Martins

Photon-Induced Fragmentation in 27Al and 32S by 1-GeV Bremsstrahlung

NUCLEAR REACTIONS 12C, 16O, 19F, 27Al, 32S(γ, X), E=1 GeV; measured yields of 7Be, 11C, 27Al, 32S.

doi: 10.1103/PhysRevC.8.206
Citations: PlumX Metrics

1972DE37      Lett.Nuovo Cim. 4, 365 (1972)

H.G.De Carvalho, J.B.Martins, O.A.P.Tavares, R.A.M.S.Nazareth, V.di Napoli

Some Remarks on the Transparency of Complex Nuclei to Photoproduced Charged Pions at Intermediate Energies

doi: 10.1007/BF02756536
Citations: PlumX Metrics

1971DE43      Lett.Nuovo Cim. 2, 1139 (1971)

H.G.de Carvalho, J.B.Martins, O.A.P.Tavares, R.A.M.S.Nazareth, V.di Napoli

Transparencies of Complex Nuclei to Photoproduced Pions and Recoil Nucleons

NUCLEAR REACTIONS 12C, 27Al, 55Mn, 100Ru, 209Bi, 238U(π0, X), (π+, X), (n, X), (p, X), E < 500 MeV; calculated nuclear transparencies.

doi: 10.1007/BF02757184
Citations: PlumX Metrics

1971DI07      Lett.Nuovo Cim. 1, 835 (1971)

V.di Napoli, A.M.Lacerenza, F.Salvetti, H.G.de Carvalho, J.B.Martins

Production of 24Na and 22Na from 27Al by High-Energy Photons

NUCLEAR REACTIONS 27Al(γ, X), E < 0.3-1 GeV; measured σ(E) for 22,24Na production.

doi: 10.1007/BF02785238
Citations: PlumX Metrics

1969DI09      Nuovo Cimento Lett. 1, 308 (1969)

V.di Napoli, D.Margadonna, F.Salvetti, H.G.de Carvalho, J.B.Martins

Gamma-Neutron Reactions in Rhodium at Energies Between 0.4 GeV and 0.9 GeV

NUCLEAR REACTIONS 103Rh(γ, xn), E = 0.4 - 0.9 GeV; measured σ(E).

doi: 10.1007/BF02752512
Citations: PlumX Metrics

1969DI10      Nuovo Cimento Lett. 1, 121 (1969)

V.di Napoli, D.Margadonna, F.Salvetti, H.G.de Carvalho, J.B.Martins

Th (γ, n) Reaction in Gold at Energies Between 0.4 GeV and 0.9 GeV

NUCLEAR REACTIONS 197Au(γ, n), E = 0.4 - 0.9 GeV; measured σ(E).

doi: 10.1007/BF02753725
Citations: PlumX Metrics

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