NSR Query Results
Output year order : Descending NSR database version of April 29, 2024. Search: Author = O.A.Tavares Found 77 matches. 2022ME08 Phys.Rev. C 106, 024608 (2022) E.L.Medeiros, N.Teruya, S.B.Duarte, O.A.P.Tavares Nonlocality effect in α decay of heavy and superheavy nuclei RADIOACTIVITY 185mPt(α); calculated contribution of the nonlocal effect on tunneling calculations. Z=52-103(α); Z=104-118(α); calculated T1/2 for 239 heavy and 16 superheavy nuclei using α-cluster potential barrier penetration model with semiclassical WKB approach. Comparison of experimental results with new universal plot (NUP), and with universal decay law (UDL). 110Te, 155Tm, 157Lu, 161,163Ta, 161,167Re, 165Ir, 169,171Au, 183Tl, 220,236U, 224Pu, 232,250Cm, 242,244Fm, 258No, 257Lr, 260,264,266Rf, 257Db, 258,262,264,266Sg, 274,276Hs, 278,280,282Cn, 284Fl(α); calculated T1/2 and compared with experimental values.
doi: 10.1103/PhysRevC.106.024608
2020TA06 Appl.Radiat.Isot. 160, 109034 (2020) Partial alpha-decay half-lives for alpha-emitting Osmium isotopes: Accurate determinations by a semi-empirical model RADIOACTIVITY 161,162,163,164,165,166,167,168,169,170,171,172,173,174Os, 184Os, 186,187,188Os(α);calculated partial T1/2, α-decay schemes. Comparison with ENSDF library data.
doi: 10.1016/j.apradiso.2020.109034
2020TA19 Appl.Radiat.Isot. 166, 109381 (2020) O.A.P.Tavares, E.L.Medeiros, M.L.Terranova Alpha-decay half-life of Hafnium isotopes reinvestigated by a semi-empirical approach RADIOACTIVITY 159,161,174,176Hf(α); analyzed available data; calculated T1/2, Q-values using heavy-particle decay calculation model.
doi: 10.1016/j.apradiso.2020.109381
2019TA14 Int.J.Mod.Phys. E28, 1950021 (2019) Nuclear radii from nuclear masses
doi: 10.1142/S0218301319500216
2018TA09 Eur.Phys.J. A 54, 65 (2018) A calculation model to half-life estimate of two-proton radioactive decay process RADIOACTIVITY A=19-67(2p); calculated proton-rich nuclei 2p-decay T1/2, partial T1/2 using tunelling mechanism through potential barrier. Compared with available data. Remark: Double-proton decay not yet observed for all calculated nuclei.
doi: 10.1140/epja/i2018-12495-4
2018TA16 Appl.Radiat.Isot. 139, 26 (2018) Toward an accurate determination of half-life of 147Sm isotope RADIOACTIVITY 147Sm(α); analyzed available data; deduced T1/2.
doi: 10.1016/j.apradiso.2018.04.001
2017GO17 Phys.Lett. B 774, 14 (2017) M.Goncalves, N.Teruya, O.A.P.Tavares, S.B.Duarte Two-proton emission half-lives in the effective liquid drop model RADIOACTIVITY 16Ne, 19Mg, 45Fe, 48Ni, 54Zn, 67Kr(2p); calculated Q-values and T1/2. Comparison with experimental data.
doi: 10.1016/j.physletb.2017.09.032
2013DE37 Phys.Rev. C 88, 064609 (2013) A.Deppman, E.Andrade, II, V.Guimaraes, G.S.Karapetyan, O.A.P.Tavares, A.R.Balabekyan, N.A.Demekhina, J.Adam, F.Garcia, K.Katovsky Superasymmetric fission of heavy nuclei induced by intermediate-energy protons NUCLEAR REACTIONS 237Np, 238U(p, F)28Mg/34mCl/38S/38Cl/39Cl/41Ar/42K/43K/43Sc/44Ar/44K/44Sc/44mSc/45K/46Sc/46mSc/47Ca/47Sc/48Sc/48V/48Cr/49Cr/51Cr/52Mn/52mMn/52Fe/54Mn/55Co/56Mn/56Co/56Ni/57Co/57Ni/58Co/58mCo/59Fe/60Co/60mCo/60Cu/61Cu/65Ni/65Zn/65Ga/66Ni/66Ga/66Ge/67Cu/67Ga/69mZn/69Ge, E=660 MeV; measured Eγ, Iγ, production σ of intermediate-mass fragments (IMF) by induced activation method at LNR Phasotron-JINR cyclotron facility. A total of 93 isotopes in A=30-200 range identified with high precision. Comparison with simulation code CRISP for multimodal fission. Discussed superasymmetric fragment production mechanism.
doi: 10.1103/PhysRevC.88.064609
2013TA07 Eur.Phys.J. A 49, 6 (2013) A calculation method to estimate partial half-lives for exotic radioactivities RADIOACTIVITY 222,223Fr, 225Ra, 227Ac, 224Th(14C);224Ac, 225Pa(15N);226,227Th(18O);229Th(20O);232Th(26Ne);233,235U, 235,236Np(28Mg);235U(29Mg);238U, 239,240Pu, 241,243Am, 240Cm(34Si);237Np(30Mg);237Np, 241Am, 240Cm(32Si); calculated T1/2 using semi-empirical model; deduced model parameters. Compared with other calculations.
doi: 10.1140/epja/i2013-13006-y
2012TA10 Phys.Scr. 86, 015201 (2012) A simple description of cluster radioactivity RADIOACTIVITY 238U, 239,240Pu, 241,243Am, 240,242,243Cm(34Si), 236,237Np, 238Pu, 241Am, 240,242Cm(32Si), 252Cf, 254Es(46Ar), 252Es(48Ca), 254Es, 258Md, 259No(50Ca), 259No(49Ca), 228Th(20O), 240Pu(34Si), 259No(50Ca), 282Rg(73Ni), 291Mc(85Br); calculated T1/2, Q-values, branching ratios. Comparison with available data.
doi: 10.1088/0031-8949/86/01/015201
2011AN29 J.Phys.:Conf.Ser. 312, 082010 (2011) E.Andrade, II, J.C.M.Menezes, S.B.Duarte, F.Garcia, P.C.R.Rossi, O.A.P.Tavares, A.Deppman Fragment mass distributions for heavy nuclei fission induced by intermediate energy probes NUCLEAR REACTIONS 237Np, 241Am(p, F), E=660 MeV;238U(γ, F), E=0-50 MeV; calculated mass distribution from bremsstrahlung reaction using Monte Carlo for nuclear cascade followed by competition between fission and particle emission. Compared with data and other calculations.
doi: 10.1088/1742-6596/312/4/082010
2011TA23 Phys.Scr. 84, 045202 (2011) Natural and artificial alpha radioactivity of platinum isotopes RADIOACTIVITY 166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,192,194,195,196,198Pt(α);calculated T1/2. Comparison with experimental values.
doi: 10.1088/0031-8949/84/04/045202
2010TA24 Eur.Phys.J. A 45, 57 (2010) Proton radioactivity: The case for 53mCo proton-emitter isomer RADIOACTIVITY 53mCo(p); calculated T1/2 using semi-empirical model. 53mCo deduced deformation. Re-analysis of older results also using data on other proton emitters.
doi: 10.1140/epja/i2010-10974-2
2009LE22 Phys.Rev. C 80, 014606 (2009) T.N.Leite, N.Teruya, A.Dimarco, S.B.Duarte, O.A.P.Tavares, M.Goncalves 12O resonant structure evaluated by the two-proton emission process RADIOACTIVITY 12O(2p); analyzed characteristics of resonant ground state, decay energy distribution, channel distribution ratios, and widths using statistical model for the sequential and simultaneous two-proton emission decay modes. Comparison with experimental data.
doi: 10.1103/PhysRevC.80.014606
2007ME28 Eur.Phys.J. A 34, 417 (2007) E.L.Medeiros, M.M.N.Rodrigues, S.B.Duarte, O.A.P.Tavares Systematics of half-lives for proton radioactivity NUCLEAR STRUCTURE A=30-186; analyzed proton-decay partial T1/2. RADIOACTIVITY 30Cl, 53Co, 58Ge, 68Br, 89Rh, 105Sb, 108,109I, 112,113Cs, 117La, 121Pr, 130,131Eu, 135Tb, 140,141Ho, 145,146,147Tm, 150,151Lu, 155,156,157Ta, 159,160,161Re, 164,165,166,167Ir, 170,171,173Au, 176,177Tl, 184,185,186Bi(p); calculated proton-decay partial T1/2. Semi-empirical model including effect of deformation.
doi: 10.1140/epja/i2007-10513-4
2006DE27 Phys.Rev. C 73, 064607 (2006) A.Deppman, G.Silva, S.Anefalos, S.B.Duarte, F.Garcia, F.H.Hisamoto, O.A.P.Tavares Photofission and total photoabsorption cross sections in the energy range of shadowing effects NUCLEAR REACTIONS 12C, 27Al, 63Cu, 118Sn, 207Pb(γ, X), E=1000-3000 MeV; calculated total photoabsorption σ. 207Pb, 232Th, 233,235,238U, 237Np(γ, F), E=900-3400 MeV; calculated photofission σ. Comparison with data.
doi: 10.1103/PhysRevC.73.064607
2006ME15 J.Phys.(London) G32, B23 (2006) E.L.Medeiros, M.M.N.Rodrigues, S.B.Duarte, O.A.P.Tavares Systematics of alpha-decay half-life: new evaluations for alpha-emitter nuclides NUCLEAR STRUCTURE A=100-300; analyzed α-decay T1/2; deduced parameters. RADIOACTIVITY 110Te, 113I, 151Gd, 174Hf, 163Ta, 180W, 184Os, 210Po, 200,206,208,211,218At, 203,228Ra, 231Pa, 250Cm, 266Sg, 272Rg(α); calculated α-decay partial T1/2. Semiempirical model.
doi: 10.1088/0954-3899/32/8/B01
2006ME20 J.Phys.(London) G32, 2345 (2006) E.L.Medeiros, M.M.N.Rodrigues, S.B.Duarte, O.A.P.Tavares Comments on the rarest alpha activity observed in nature RADIOACTIVITY 180W(α); compiled, analyzed T1/2.
doi: 10.1088/0954-3899/32/11/N01
2006MO44 Braz.J.Phys. 36, 1383 (2006) Fissility of Actinide Nuclei by 60-130 MeV Photons NUCLEAR REACTIONS 232Th, 233,235,238U, 237Np(γ, F), Eγ=60-130 MeV; calculated total nuclear photoabsorption cross section based on the quasi-deuteron nuclear photabsorption model, and nuclear fissility from the available data.
doi: 10.1590/S0103-97332006000800011
2006TA01 Nucl.Instrum.Methods Phys.Res. B243, 256 (2006) O.A.P.Tavares, M.L.Terranova, E.L.Medeiros New evaluation of alpha decay half-life of 190Pt isotope for the Pt-Os dating system RADIOACTIVITY 166,167,168,170,171,172,174,175,176,177,178,180,181,182,183,184,186,188Pt(α); analyzed T1/2, Qα; deduced parameters. 190Pt(α); calculated T1/2. Semi-empirical model, astrophysical implications discussed.
doi: 10.1016/j.nimb.2005.08.122
2005TA03 J.Phys.(London) G31, 129 (2005) O.A.P.Tavares, E.L.Medeiros, M.L.Terranova Alpha decay half-life of bismuth isotopes RADIOACTIVITY 187,189,191,193,195,197,199,200,201,202,203,204,205,206,207,208,209,211,212,213,214Bi(α); calculated α-decay partial T1/2. Comparison with data.
doi: 10.1088/0954-3899/31/2/005
2005TA37 Braz.J.Phys. 35, 915 (2005) O.A.P.Tavares, S.B.Duarte, V.Morcelle, A.Deppman Photofissility at 1 GeV for Nuclei Throughout the Periodic Table NUCLEAR REACTIONS 48Ti, 56Fe, 59Ni, 63Cu, 65Zn, 93Nb, 96Mo, 108Ag, 112Cd, 115In, 119Sn, 122Sb, 128Te, 139La, 140Ce, 144Nd, 150Sm, 157Gd, 159Tb, 163Dy, 165Ho, 169Tm, 173,174Yb, 175Lu, 178Hf, 181Ta, 184W, 186Re, 190Os, 195Pt, 197Au, 201Hg, 204Tl, 207,208Pb, 209Bi, 232Th, 233,235,238U, 237Np(γ, F), E=1 GeV; calculated first-chance fission probability.
doi: 10.1590/S0103-97332005000500054
2004DU23 J.Phys.(London) G30, 1487 (2004) S.B.Duarte, O.A.P.Tavares, M.Goncalves, O.Rodriguez, F.Guzman, T.N.Barbosa, F.Garcia, A.Dimarco Half-life predictions for decay modes of superheavy nuclei NUCLEAR STRUCTURE Z=110-135; calculated α-decay, cluster-decay, and cold fission T1/2. Effective liquid-drop model. RADIOACTIVITY 287,288Mc, 283,284Nh, 279,280Rg(α); calculated T1/2, Qα. Effective liquid-drop model, comparison with data.
doi: 10.1088/0954-3899/30/10/014
2004LI78 Braz.J.Phys. 34, 753 (2004) V.P.Likhachev, J.D.T.Arruda-Neto, M.T.F.da Cruz, H.Dias, S.B.Duarte, W.R.Carvalho, Jr., M.S.Hussein, A.C.S.Lima, L.F.R.Macedo, J.Mesa, S.A.Pashchuk, T.E.Rodrigues, G.Silva, H.R.Schelin, O.A.P.Tavares Residual Nucleus Excitation Energy in (e, e'p)- Reaction
doi: 10.1590/S0103-97332004000500012
2004RO22 Phys.Rev. C 69, 064611 (2004) T.E.Rodrigues, J.D.T.Arruda-Neto, A.Deppman, V.P.Likhachev, J.Mesa, C.Garcia, K.Shtejer, G.Silva, S.B.Duarte, O.A.P.Tavares Photonuclear reactions at intermediate energies investigated via the Monte Carlo multicollisional intranuclear cascade model NUCLEAR REACTIONS Sn, Ce, Ta, Pb(γ, X), E=20-140 MeV; calculated total photoabsorption σ, neutron multiplicities. Monte Carlo multicollisional intranuclear cascade model, comparison with data.
doi: 10.1103/PhysRevC.69.064611
2004TA04 J.Phys.(London) G30, 377 (2004) O.A.P.Tavares, S.B.Duarte, A.Deppman, V.P.Likhachev Nuclear photofissility of natPb and 232Th at energies above the pion photoproduction threshold NUCLEAR REACTIONS Pb, 232Th(γ, F), E=0.2-6 GeV; calculated fissility, fragment production probabilities. Intranuclear cascade and evaporation-fission competition mechanisms, comparison with data.
doi: 10.1088/0954-3899/30/4/001
2004TA05 J.Phys.(London) G30, 395 (2004) Level density parameter at the fission saddle point from intermediate-energy photofission cross section data NUCLEAR REACTIONS 232Th, 233,235,238U, 237Np(γ, F), E ≈ 40-130 MeV; analyzed photofission data; deduced level density parameter.
doi: 10.1088/0954-3899/30/4/002
2004TA48 Braz.J.Phys. 34, 924 (2004) O.A.P.Tavares, S.B.Duarte, A.Deppman, V.P.Likhachev New Approach to Nuclear Photofission Reactions above 0.15 GeV NUCLEAR REACTIONS Pb(γ, F), E ≈ 0.1-7 GeV; analyzed fission probability. Two-step model.
doi: 10.1590/S0103-97332004000500058
2003DE20 Nucl.Instrum.Methods Phys.Res. B211, 15 (2003) A.Deppman, O.A.P.Tavares, S.B.Duarte, J.D.T.Arruda-Neto, M.Goncalves, V.P.Likhachev, J.Mesa, E.C.de Oliveira, S.R.de Pina, O.Rodriguez A Monte Carlo method for nuclear evaporation and fission at intermediate energies NUCLEAR STRUCTURE 237Np, 238U, 232Th; calculated fissility vs excitation energy, competition with evaporation channels. Monte Carlo approach.
doi: 10.1016/S0168-583X(03)01265-5
2002DE35 J.Phys.(London) G28, 2259 (2002) S.R.de Pina, J.Mesa, A.Deppman, J.D.T.Arruda-Neto, S.B.Duarte, E.C.de Oliveira, O.A.P.Tavares, E.L.Medeiros, M.Goncalves, E.de Paiva Nucleon Effective Mass Effects on the Pauli-Blocking Function
doi: 10.1088/0954-3899/28/8/311
2002DE60 Phys.Rev. C 66, 067601 (2002) A.Deppman, O.A.P.Tavares, S.B.Duarte, J.D.T.Arruda-Neto, M.Goncalves, V.P.Likhachev, E. C.de Oliveira Photofissility of heavy nuclei at intermediate energies NUCLEAR REACTIONS 209Bi, 232Th, 238U, 237Np, 243Am(γ, F), E=200-1000 MeV; calculated fissility. 209Bi, 243Am(γ, F), E=200-1000 MeV; calculated photofission σ. Monte Carlo approach.
doi: 10.1103/PhysRevC.66.067601
2002DU16 At.Data Nucl.Data Tables 80, 235 (2002) S.B.Duarte, O.A.P.Tavares, F.Guzman, A.Dimarco, F.Garcia, O.Rodriguez, M.Goncalves Half-Lives for Proton Emission, Alpha Decay, Cluster Radioactivity, and Cold Fission Processes Calculated in a Unified Theoretical Framework RADIOACTIVITY 105Sb, 109I, 112,113Cs, 117La, 131Eu, 140,141Ho, 145,146,147Tm, 150,151Lu, 156,157Ta, 160,161Re, 165,166,167Ir, 171Au, 185Bi(p); calculated proton emission T1/2. 221Fr, 221,222,223,224,226Ra, 225Ac(14C); 228Th(20O); 230Th, 231Pa, 232,233,234U(24Ne); 234U(26Ne); 234U, 236,238Pu(28Mg); 238Pu(30Mg), (32Si); 242Cm(34Si); calculated cluster emission T1/2. 258,259Fm, 259,260Md, 258,262No(SF); calculated fission fragment mass distributions. Z=27-111; A=50-273; calculated T1/2, Q for p-decay, α-decay, cluster emission. Z=82-111; A=180-272; calculated cold fission T1/2. Effective liquid drop model, comparisons with data.
doi: 10.1006/adnd.2002.0881
2001DE27 J.Phys.(London) G27, 1435 (2001) E.de Paiva, O.A.P.Tavares, M.L.Terranova Nuclear Photofissility in the Quasi-Deuteron Energy Region NUCLEAR REACTIONS 27Al, 48Ti, 51V, 154Sm, 174Yb, 178Hf, 181Ta, 184W, 186Re, 190Os, 195Pt, 197Au, 204Tl, 207,208Pb, 209Bi(γ, F), E ≈ 20-160 MeV; analyzed fission data; deduced reaction mechanism features. Two-step model, quasi-deuteron photon absorption.
doi: 10.1088/0954-3899/27/7/305
2001DE41 Phys.Rev.Lett. 87, 182701 (2001) A.Deppman, O.A.P.Tavares, S.B.Duarte, E.C.de Oliveira, J.D.T.Arruda-Neto, S.R.de Pina, V.P.Likhachev, O.Rodriguez, J.Mesa, M.Goncalves Photofissility of Actinide Nuclei at Intermediate Energies NUCLEAR REACTIONS 237Np, 238U, 232Th(γ, F), E ≈ 200-1000 MeV; analyzed fissility; deduced role of proton and α evaporation. Monte Carlo approach.
doi: 10.1103/PhysRevLett.87.182701
2000DI17 Int.J.Mod.Phys. E9, 205 (2000) A.Dimarco, S.B.Duarte, O.A.P.Tavares, M.Goncalves, F.Garcia, O.Rodriguez, F.Guzman Effect of Nuclear Deformation on the Alpha-Decay Half-Life of Even-Even Alpha Emitters NUCLEAR STRUCTURE Z=52-108; calculated α-decay T1/2, deformation effects. Comparison with data.
doi: 10.1016/S0218-3013(00)00014-3
2000GA25 J.Phys.(London) G26, 755 (2000) F.Garcia, O.Rodriguez, M.Goncalves, S.B.Duarte, O.A.P.Tavares, F.Guzman Alpha Decay and Nuclear Deformation: The case for favoured alpha transitions of even-even emitters RADIOACTIVITY A=106-264(α); calculated T1/2 including quadrupole deformation effects. Comparison with experimental values.
doi: 10.1088/0954-3899/26/6/301
1999GU08 Phys.Rev. C59, R2339 (1999) F.Guzman, M.Goncalves, O.A.P.Tavares, S.B.Duarte, F.Garcia, O.Rodriguez Proton Radioactivity from Proton-Rich Nuclei RADIOACTIVITY 55Cu, 58Ge, 105Sb, 109I, 112,113Cs, 142Ho, 146,147Tm, 150,151Lu, 156,157Ta, 160,161Re, 165,166,167Ir, 171Au, 177,178,179Tl, 185,187Bi(p); calculated proton decay T1/2. Effective liquid drop model. Comparison with data.
doi: 10.1103/PhysRevC.59.R2339
1999RO01 Phys.Rev. C59, 253 (1999) O.Rodriguez, F.Guzman, S.B.Duarte, O.A.P.Tavares, F.Garcia, M.Goncalves New Valleys of Cold Fission and Cluster Radioactivity Processes from Nuclei Far from the β-Stability Line RADIOACTIVITY Rn, Po, Pb; calculated α-decay T1/2. Ba, Sn, Po, Bi; calculated cluster decay T1/2 in neutron-deficient isotopes; deduced shell effects. Geiger-Nutall systematics.
doi: 10.1103/PhysRevC.59.253
1999TA27 J.Phys.(London) G25, 1979 (1999) O.A.P.Tavares, E.De Paiva, G.Ya.Kezerashvili, R.Ya.Kezerashvili, N.Yu.Muchnoi, A.I.Naumenkov, I.Ya.Protopopov, E.A.Simonov, M.L.Terranova Photofission of 27Al Nucleus in the Quasi-Deuteron Region of Photonuclear Absorption NUCLEAR REACTIONS 27Al(γ, F), E ≈ 108 MeV; measured absorption, fission σ. 27Al deduced fissility.
doi: 10.1088/0954-3899/25/9/315
1998DU05 Phys.Rev. C57, 2516 (1998) S.B.Duarte, O.Rodriguez, O.A.P.Tavares, M.Goncalves, F.Garcia, F.Guzman Cold Fission Description with Constant and Varying Mass Asymmetries RADIOACTIVITY 234U(SF); calculated T1/2, fragments mass distributions. Comparison of constant, variable mass asymmetry descriptions. Alpha, cluster radioactivity also discussed.
doi: 10.1103/PhysRevC.57.2516
1998TA21 J.Phys.(London) G24, 1757 (1998) O.A.P.Tavares, S.B.Duarte, O.Rodriguez, F.Guzman, M.Goncalves, F.Garcia Effective Liquid Drop Description for Alpha Decay of Atomic Nuclei NUCLEAR STRUCTURE Z=52-111; calculated α-decay T1/2. Effective liquid drop model. Comparison with data.
doi: 10.1088/0954-3899/24/9/009
1998TE02 J.Phys.(London) G24, 205 (1998) M.L.Terranova, G.Ya.Kezerashvili, A.M.Milov, S.I.Mishnev, N.Yu.Muchnoi, A.I.Naumenkov, I.Ya.Protopopov, E.A.Simonov, D.N.Shatilov, O.A.P.Tavares, E.De Paiva, E.L.Moreira Photofission Cross Section and Fissility of Pre-Actinide and Intermediate-Mass Nuclei by 120 and 145 MeV Compton Backscattered Photons NUCLEAR REACTIONS 209Bi, Pt, 197Au, W, 181Ta, 51V, Ti(γ, F), E=120, 145 MeV; measured photofission, total photoabsorption σ; deduced fissility Z2/A dependence.
doi: 10.1088/0954-3899/24/1/023
1997DU14 Phys.Rev. C56, 3414 (1997) S.B.Duarte, O.A.P.Tavares, M.Goncalves Importance of the Inner Potential Barrier in Nuclear Spontaneous Cold Fission Processes RADIOACTIVITY 234U, 242Pu, 248Cf, 252Cf(SF); calculated potential barrier for several decay modes; deduced inner barrier role.
doi: 10.1103/PhysRevC.56.3414
1997TA18 Nuovo Cim. 110A, 497 (1997) Anisotropy of Favoured Alpha Transitions Producing Even-Even Deformed Nuclei RADIOACTIVITY 252Cf(α); calculated Coulomb barrier for favored α-decay; deduced daughter nucleus deformation effects. Other nuclei discussed.
doi: 10.1007/BF03035896
1997TA33 Radiat.Meas. 27, 19 (1997) Alpha activity of 190Pt isotope measured with CR-39 track detector RADIOACTIVITY 190Pt(α); measured decay products, Eα, Iα; deduced T1/2 of 190Pt decay using CR-39 track detector at Gran-Sasso Underground Laboratory (INFN-LNGS). Natural platinum sample. Comparison with previous measurements of half-lives by direct counting.
doi: 10.1016/S1350-4487(96)00154-0
1996TE05 J.Phys.(London) G22, 511 (1996) M.L.Terranova, O.A.P.Tavares, G.Ya.Kezerashvili, V.A.Kiselev, A.M.Milov, N.Yu.Muchnoi, A.I.Naumenkov, V.V.Petrov, I.Ya.Protopopov, E.A.Simonov, E.de Paiva, E.L.Moreira Fissility of Bi, Pb, Au, Pt, W, Ta, V and Ti Nuclei Measured with 100 MeV Compton Backscattered Photons NUCLEAR REACTIONS, ICPND 209Bi, Pb, 197Au, Pt, W, 181Ta, 51V, Ti(γ, F), E=100 MeV; measured fission yield; deduced absolute photofission σ, photofissility for elemental targets. 209Bi, 197Au, 181Ta, 51V deduced photofissility.
doi: 10.1088/0954-3899/22/4/012
1996TE08 J.Phys.(London) G22, 1661 (1996) M.L.Terranova, G.Ya.Kezerashvili, V.A.Kiselev, A.M.Milov, S.I.Mishnev, I.Ya.Protopopov, V.N.Rotaev, D.N.Shatilov, O.A.P.Tavares Fission Cross Section and Fissility of 209Bi by 60-270 MeV Tagged Photons NUCLEAR REACTIONS 209Bi(γ, F), E=60-270 MeV; measured photon induced fission σ(E); analyzed other data. 209Bi deduced fissility vs Eγ. Multi-wire spark counters based fragment detector. Two-step model analysis.
doi: 10.1088/0954-3899/22/11/013
1994TE02 Phys.Scr. 49, 267 (1994) Total Nuclear Photoabsorption Cross Section in the Range 0.2-1.0 GeV for Nuclei Throughout the Periodic Table NUCLEAR STRUCTURE A=3-238; analyzed photoabsorption σ(E) for targets in this mass range for E ≈ 0.2-1 GeV; deduced mean σ.
doi: 10.1088/0031-8949/49/3/004
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
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
1992TA06 J.Phys.(London) G18, 521 (1992) Nuclear Photoabsorption by Quasi-Deuterons and an Updated Evaluation of Levinger's Constant NUCLEAR STRUCTURE A ≤ 200; analyzed photoabsorption, rms radius data; deduced Levinger constant. Quasideuteron model.
doi: 10.1088/0954-3899/18/3/006
1992TA13 Z.Phys. A343, 407 (1992) Analysis of 209Bi and 238U Photofission Cross Section in the Quasi-Deuteron Region of Photonuclear Absorption NUCLEAR REACTIONS 209Bi, 238U(γ, F), E=30-140 MeV; analyzed photofission σ(E). Quasideuteron photoabsorption followed by evaporation fission model.
doi: 10.1007/BF01289817
1992TA14 Nuovo Cim. 105A, 723 (1992) A New Systematics of Fragment Total Kinetic Energy Release in Fission
doi: 10.1007/BF02730778
1991DE04 Nuovo Cim. 104A, 263 (1991) D.A.De Lima, W.C.C.Milomem, O.A.P.Tavares Probability of Ternary Fission of 93Nb and (nat)Ag Nuclei Induced by (0.8 - 1.8) GeV Photons NUCLEAR REACTIONS 93Nb, Ag(γ, F), E=0.8-1.8 GeV bremsstrahlung; measured ternary to binary fission σ ratio. 93Nb, Ag deduced ternary fission probability.
doi: 10.1007/BF02910880
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
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
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
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
1989DE30 Nuovo Cim. 101A, 975 (1989) D.A.De Lima, E.V.De Sousa, W.C.C.Milomem, O.A.P.Tavares Cross-Section of Ternary Fission of Al, Ti, Co, and Zr Nuclei Induced by (0.8-1.8) GeV Photons NUCLEAR REACTIONS 27Al, Ti, 59Co, Zr(γ, F), E=0.8-1.4 GeV bremsstrahlung; measured ternary fission σ(E); deduced ternary fission probability. Fission track detectors.
doi: 10.1007/BF02800164
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Back to query form |