Juan Antonio Alcántara-Núñez
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Interests
Juan Antonio Alcántara-Núñez has a total of 37 co-authors. Here are the top co-authors by number of shared publications:
- A. Barioni
Departamento de Ciências do Mar, Universidade Federal de São Paulo, Santos, 11070-100 São Paulo, Brazil
1 shared publication - A. L. de Lara
IJCLab
1 shared publication - A. S. Serra
Universidade de São Paulo
1 shared publication - Alinka Lepine-Szily
Universidade de São Paulo
1 shared publication - Antonio M. Moro
Universidad de Sevilla
1 shared publication - Cleber Lima Rodrigues
University of São Paulo
1 shared publication
Latest Publications
- 1 June 2021
- Published by American Physical Society (APS) in Physical Review C
- Vol. 103 (6) , 064601
Evidence of the effect of strong stripping channels on the dynamics of the reactionThe collision is investigated at 23.9, 26.1, 28.7, and 30 MeV bombarding energies. Quasielastic angular distributions and the singles angular and energy distributions are presented. Coupled-reaction channels (CRC) calculations, which include the coupling of the elastic channel to states above and below the neutron threshold, provide a simultaneous description of the quasielastic and transfer distributions and evidence the strong effect of the one-neutron transfer/breakup channels on the quasielastic scattering. The angular and energy distributions have been also successfully analyzed combining the continuum discretized coupled channels (CDCC) method, for the elastic breakup, and the IAV model of Ichimura, Austern, and Vincent [ Phys. Rev. C 32, 431 (1985)], for the nonelastic breakup. These calculations indicate that most of the yields are due to nonelastic breakup contributions (transfer), whereas elastic breakup plays a minor role.- 1 June 2021
- Published by American Physical Society (APS) in Physical Review C
- Vol. 103 (6) , 064601
Evidence of the effect of strong stripping channels on the dynamics of the reactionThe collision is investigated at 23.9, 26.1, 28.7, and 30 MeV bombarding energies. Quasielastic angular distributions and the singles angular and energy distributions are presented. Coupled-reaction channels (CRC) calculations, which include the coupling of the elastic channel to states above and below the neutron threshold, provide a simultaneous description of the quasielastic and transfer distributions and evidence the strong effect of the one-neutron transfer/breakup channels on the quasielastic scattering. The angular and energy distributions have been also successfully analyzed combining the continuum discretized coupled channels (CDCC) method, for the elastic breakup, and the IAV model of Ichimura, Austern, and Vincent [ Phys. Rev. C 32, 431 (1985)], for the nonelastic breakup. These calculations indicate that most of the yields are due to nonelastic breakup contributions (transfer), whereas elastic breakup plays a minor role.- 9 November 2020
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 36 (1) , 120-132
Determination of stable isotope ratios using nuclear reaction analysis coupled with a particle–gamma coincidence method
A non-destructive standard-free analytical method of obtaining stable isotope ratios in materials using nuclear reactions excited by an 11.75 MeV proton beam is demonstrated for a special 63Cu/65Cu target characterized traceably by Rutherford backscattering spectrometry (using 2.2 MeV protons). The method is general and is capable of being a useful alternative to standard ICP-MS methods. Relatively high energy proton beams are required to excite multiple isotopes of most elements of interest, and the many resulting nuclear reaction products are filtered by coincidence methods to characterize the desired isotope ratios. Specifically: the use of particle–gamma coincidences permits identification of specific channels populated in the nuclear reaction and avoids or minimizes typical drawbacks of this method including high backgrounds and interfering reactions. The test Cu target was a sandwich of a natural Cu and an enriched 65Cu foil, and particle–gamma coincidences were measured for the reactions 63Cu(p,πγ){63Cu,60Ni} and the corresponding reactions for 65Cu (where “π” represents the energetic charged particle reaction product: proton or alpha). Limitations of the method, and applications in cultural heritage and other fields are discussed.
- 9 November 2020
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 36 (1) , 120-132
Determination of stable isotope ratios using nuclear reaction analysis coupled with a particle–gamma coincidence method
A non-destructive standard-free analytical method of obtaining stable isotope ratios in materials using nuclear reactions excited by an 11.75 MeV proton beam is demonstrated for a special 63Cu/65Cu target characterized traceably by Rutherford backscattering spectrometry (using 2.2 MeV protons). The method is general and is capable of being a useful alternative to standard ICP-MS methods. Relatively high energy proton beams are required to excite multiple isotopes of most elements of interest, and the many resulting nuclear reaction products are filtered by coincidence methods to characterize the desired isotope ratios. Specifically: the use of particle–gamma coincidences permits identification of specific channels populated in the nuclear reaction and avoids or minimizes typical drawbacks of this method including high backgrounds and interfering reactions. The test Cu target was a sandwich of a natural Cu and an enriched 65Cu foil, and particle–gamma coincidences were measured for the reactions 63Cu(p,πγ){63Cu,60Ni} and the corresponding reactions for 65Cu (where “π” represents the energetic charged particle reaction product: proton or alpha). Limitations of the method, and applications in cultural heritage and other fields are discussed.