NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = M.C.Alfonso Found 6 matches. 2015MA63 Phys.Rev. C 92, 054601 (2015) D.A.Mayorov, T.A.Werke, M.C.Alfonso, E.E.Tereshatov, M.E.Bennett, M.M.Frey, C.M.Folden Evaporation residue excitation function measurements in 50Ti- and 54Cr-induced reactions with lanthanide targets NUCLEAR REACTIONS 160Gd, 159Tb, 162Dy(50Ti, 3n), (50Ti, 4n), (50Ti, 5n), 159Tb, 162Dy(50Ti, 2np), (50Ti, 3np), 159Tb(50Ti, 4np), E=4.9 MeV/nucleon; 162Dy(54Cr, 4n), (54Cr, 5n), (54Cr, 2np), (54Cr, 3np), 5.1 MeV/nucleon; measured reaction products, Eα and half-lives of the radioactive isotopes produced, σ(E) of evaporation residues (ER), (ER)αα-correlations, using MARS spectrometer at Texas A and M cyclotron facility. Enriched targets. 159Tb, 162Dy(48Ca, 3n), 154Gd, 159Tb, 162Dy, 165Ho(48Ca, 4n), (48Ca, 5n), 176Hf(40Ar, 4n), (40Ar, 5n), 124Sn(92Zr, 4n), (92Zr, 5n), E(*)=35-60 MeV; analyzed σ(E). Statistical model analysis, and comparison with predictions of Bohr-Wheeler transition-state theory. Discussed effect of collective enhancement of level density (CELD). RADIOACTIVITY 204,205,206Rn, 204,205,206,208,209Fr, 208,209Ra(α)[from 160Gd, 159Tb, 162Dy(50Ti, X), E=4.9 MeV/nucleon; 212,213Ac(α)[from 162Dy(54Cr, X), E=5.1 MeV/nucleon]; measured Eα, half-lives of 205Fr and 208Ra decays.
doi: 10.1103/PhysRevC.92.054601
2015WE13 Phys.Rev. C 92, 034613 (2015) T.A.Werke, D.A.Mayorov, M.C.Alfonso, M.E.Bennett, M.J.DeVanzo, M.M.Frey, E.E.Tereshatov, C.M.Folden Hot fusion-evaporation cross sections of 45Sc-induced reactions with lanthanide targets NUCLEAR REACTIONS 156,157,158,160Gd, 159Tb, 162Dy(45Sc, 3n), (45Sc, 4n), (45Sc, 5n), (45Sc, 6n), (45Sc, 2np), (45Sc, 3np), 162Dy(45Sc, α), (45Sc, nα), (45Sc, 2nα), E≈5 MeV/nucleon; measured reaction products, Eα from decay products, evaporation residue cross sections σ(E) for 3n-, 4n-, 5n-, 6n-, p2n-, p3n-, p4n-, p5n-channels and α-, αn, α2n-channels for 162Dy using Momentum Achromat Recoil Spectrometer (MARS) at Texas A and M; deduced influence of collective enhancements to level density (CELD). Comparison with theoretical model for the fusion-evaporation process. Relevance to production of SHE region nuclei. RADIOACTIVITY 197,198,199,200m,201At, 197,198,199,201mPo, 200,203mRn, 203Fr(α)[from 156,157,158,160Gd, 159Tb, 162Dy(45Sc, 4n), (45Sc, 3np), E≈5 MeV/nucleon]; measured Eα. Comparison with previously measured values.
doi: 10.1103/PhysRevC.92.034613
2015WE16 Phys.Rev. C 92, 054617 (2015) T.A.Werke, D.A.Mayorov, M.C.Alfonso, E.E.Tereshatov, C.M.Folden, III Hot fusion-evaporation cross sections of 44Ca-induced reactions with lanthanide targets NUCLEAR REACTIONS 158Gd(44Ca, 3n), (44Ca, 4n), (44Ca, 5n), (44Ca, 6n), E=177.6, 184.2, 185.7, 188.4, 191.3, 196.0; 159Tb(44Ca, 3n), (44Ca, 4n), (44Ca, 5n), (44Ca, 3np), (44Ca, 4np), (44Ca, 5np), E=184.7, 189.8, 196.3, 200.5, 208.0; 162Dy(44Ca, 3n), (44Ca, 4n), (44Ca, 5n), (44Ca, 2np), (44Ca, 3np), (44Ca, 4np), (44Ca, 5np), E=183.7, 188.9, 195.4, 199.5, 207.1; measured reaction products, σ(E) using Momentum Recoil Achromat Spectrometer (MARS) at Cyclotron Institute of Texas A and M University. Comparison with theoretical model calculations with and without consideration of collective enhancements to level density (CELD), and with experimental σ(E) for 45Sc induced reactions on the same targets; deduced little evidence for cross-sectional enhancement due to shell stabilization of compound nucleus. RADIOACTIVITY 197,198Po(α)[from 158Gd(44Ca, 5n), (44Ca, 4n), E≈5 MeV/nucleon]; 199At, 199mPo(α)[from 159Tb(44Ca, 4n), (44Ca, 3np), E≈5 MeV/nucleon]; 202Rn, 202At(α)[from 162Dy(44Ca, 4n), (44Ca, 3np), E≈5 MeV/nucleon]; Measured Eα, and T1/2 of 199At, 202Rn decays. Comparison with evaluated data in the chart of nuclides on NNDC webpage.
doi: 10.1103/PhysRevC.92.054617
2014MA66 Phys.Rev. C 90, 024602 (2014) D.A.Mayorov, T.A.Werke, M.C.Alfonso, M.E.Bennett, C.M.Folden Production cross sections of elements near the N=126 shell in 48Ca-induced reactions with 154Gd, 159Tb, 162Dy, and 165Ho targets NUCLEAR REACTIONS 154Gd(48Ca, 3n)199mPo, 154Gd(48Ca, 4n)198Po, 154Gd(48Ca, 5n)197mPo, 159Tb(48Ca, 3n)204At, (48Ca, 4n)203At, (48Ca, 5n)202At, (48Ca, 6n)201At, 162Dy(48Ca, 3n)207Rn, (48Ca, xn)206Rn/205Rn, (48Ca, 6n)204Rn, 165Ho(48Ca, 3n)210Fr, (48Ca, xn)209Fr/208Fr, (48Ca, 6n)207Fr, E=180-210 MeV; measured reaction products, α spectra from residues, evaporation residue σ(E) using MARS spectrometer at Texas A-M cyclotron facility; deduced signature of collective effects. Comparison with theoretical σ(E), calculated with and without the inclusion of collective enhancement of level density. Discussed implications for production of superheavy elements. RADIOACTIVITY 198,199mPo, 203,204At, 206,207Rn, 209,210Fr(α)[from 154Gd, 159Tb, 162Dy, 165Ho(48Ca, xn), E=180-210 meV]; measured Eα, compared with previous experimental values.
doi: 10.1103/PhysRevC.90.024602
2012BE07 Nucl.Instrum.Methods Phys.Res. B276, 62 (2012) M.E.Bennett, D.A.Mayorov, K.D.Chapkin, M.C.Alfonso, T.A.Werke, C.M.Folden III Measurement of the natLu(p, x)175Hf excitation function NUCLEAR REACTIONS Lu(p, X)175Hf, E=5.2-16.7 MeV; Ti(p, X)48V, E=6.9-16 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with available data.
doi: 10.1016/j.nimb.2012.01.039
2012FO09 Nucl.Instrum.Methods Phys.Res. A678, 1 (2012) C.M.Folden III, M.C.Alfonso, D.A.Mayorov, K.R.Lawrence, A.A.Alharbi, E.Berdugo, P.J.Cammarata, A.C.Raphelt, B.T.Roeder, T.A.Werke Development of the MARS separator for heavy element studies NUCLEAR REACTIONS 165Ho(40Ar, xnyp)197Po/197mPo/198Po/198At/199Po/199mPo/199At/200At, E=220.2 MeV; measured Eα, half-lives, (EVR)α correlations, excitation functions, σ for production of heavy-element studies using MARS separator at Texas A
doi: 10.1016/j.nima.2012.02.035
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