Search

Your search keyword '"Ashton Falduto"' showing total 4 results
Start Over Author "Ashton Falduto"
4 results on '"Ashton Falduto"'

1. Coulomb dissociation of 16O into 4He and 12C

Author

Lukas Thomas Bott, Kathrin Göbel, Michael Heil, Aleksandra Kelić-Heil, René Reifarth, Marialuisa Aliotta, Tahani Almusidi, Hector Alvarez-Pol, Leyla Atar, Liam Atkins, Thomas Aumann, Daniel Bemmerer, José Benlliure, Carlos Bertulani, Konstanze Boretzky, Benjamin Brückner, Leonhard Brandenburg, Giovanni Bruni, Pablo Cabanelas Eiras, Christoph Caesar, Enrique Casarejos, Joakim Cederkall, Leonid Chulkov, Dolores Cortina-Gil, Andrey Danilov, Enrico De Filippo, Sophia Florence Dellmann, Isabell Deuter, José Antonio Dueñas Díaz, Meytal Duer, Zoltan Elekes, Philipp Erbacher, Sonia Escribano Rodriguez, Zsolt Fülöp, Ashton Falduto, Manuel Feijoo, Stefan Fiebiger, Igor Gašparić, Daniel Galaviz, María José García Borge, Gabriel García-Jiménez, Elena Geraci, Roman Gernhäuser, Jan Glorius, Brunilde Gnoffo, David González Caamaño, Antia Graña González, Alexander Grein, AnnaLena Hartig, Tanja Heftrich, Henning Heggen, Marcel Heine, Andreas Heinz, Corinna Henrich, Thomas Hensel, Matthias Holl, Ilja Homm, Ákos Horváth, Andrea Horvat, Andrea Jedele, Desa Jelavic Malenica, Tobias Jenegger, Håkan T. Johansson, Björn Jonson, Julian Kahlbow, Nasser Kalantar-Nayestanaki, Armel Kamenyero, Kafa Khasawneh, Oleg Kiselev, Philipp Klenze, Marco Knösel, Karsten Koch, Marvin Kohls, Daniel Körper, Thorsten Kröll, Sabina Krasilovskaja, Dmytro Kresan, Deniz Kurtulgil, Nikolaus Kurz, Bastian Löher, Christoph Langer, Claudia Lederer-Woods, Christopher Lehr, Yuri A Litvinov, Enis Lorenz, Nunzia Simona Martorana, Tohru Motobayashi, Silvia Murillo Morales, Enrique Nacher, Thomas Nilsson, Emanuele Vincenzo Pagano, Valerii Panin, Joochun Park, Stefanos Paschalis, Angel Perea, Marina Petri, Sara Pirrone, Ralf Plag, Lukas Ponnath, Romana Popočovski, Markus Reich, Han-Bum Rhee, Jose Luis Rodriguez Sanchez, Dominic Rossi, Paolo Russotto, Ángel-Miguel Sánchez-Benítez, Christian Sürder, Deniz Savran, Heiko Scheit, Konrad Schmidt, Hendrik Schulte, Haik Simon, Johannes Simon, Viktor Starostin, Sonja Storck-Dutine, Hans Toshihide Törnqvist, Junki Tanaka, Olof Tengblad, Benedikt Thomas, Marina Trimarchi, Stefan Typel, László Varga, Klaus Volk, Meiko Volknandt, Vadim Wagner, Felix Wamers, Mario Weigand, and Lorenzo Zanetti

Subjects
General Medicine
Abstract

We measured the Coulomb dissociation of 16O into 4He and 12C within the FAIR Phase-0 program at GSI Helmholtzzentrum für Schwerionenforschung Darmstadt, Germany. From this we will extract the photon dissociation cross section 16O(α,γ)12C, which is the time reversed reaction to 12C(α,γ)16O. With this indirect method, we aim to improve on the accuracy of the experimental data at lower energies than measured so far. The expected low cross section for the Coulomb dissociation reaction and close magnetic rigidity of beam and fragments demand a high precision measurement. Hence, new detector systems were built and radical changes to the R3B setup were necessary to cope with the high-intensity 16O beam. All tracking detectors were designed to let the unreacted 16O ions pass, while detecting the 12C and 4He.

Published
2023

2. A technique for the study of (p,n) reactions with unstable isotopes at energies relevant to astrophysics

Author

Ashton Falduto, R. G. T. Zegers, Antonio Villari, Alfredo Estrade, J. S. Randhawa, Sean Liddick, Fernando Montes, Mihai Horoi, Jonathan Sheehan, Kun Wang, Pelagia Tsintari, A. C. Dombos, S. Lipschutz, J. Pereira, Thomas Redpath, Georgios Perdikakis, Stephanie Lyons, P. Gastis, J. Schmitt, Matthew Redshaw, A. Palmisano, G. P. A. Berg, and Mallory Smith

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Spectrometer, Isotope, 010308 nuclear & particles physics, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Nuclear astrophysics, Neutron detection, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Beam (structure), Line (formation)
Abstract

We have developed and tested an experimental technique for the measurement of low-energy (p,n) reactions in inverse kinematics relevant to nuclear astrophysics. The proposed setup is located at the ReA3 facility at the National Superconducting Cyclotron Laboratory. In the current approach, we operate the beam-transport line in ReA3 as a recoil separator while tagging the outgoing neutrons from the (p,n) reactions with the low-energy neutron detector array (LENDA). The developed technique was verified by using the $^{40}$Ar(p,n)$^{40}$K reaction as a probe. The results of the proof-of-principle experiment with the $^{40}$Ar beam show that cross-section measurements within an uncertainty of $\sim$25\% are feasible with count rates up to 7 counts/mb/pnA/s. In this article, we give a detailed description of the experimental setup, and present the analysis method and results from the test experiment. Future plans on using the technique in experiments with the separator for capture reactions (SECAR) that is currently being commissioned are also discussed., Comment: Submitted to NIMA. Revised manuscript after referees' first review

Published
2020
Full Text
View/download PDF

3. Experimental constraint on stellar electron-capture rates from the Sr88(t,He3+γ)Rb88 reaction at 115 MeV/u

Author

Jonathan Engel, J. C. Zamora, P. Gastis, E. M. Ney, H. L. Crawford, A. O. Macchiavelli, Alexandra Gade, Sam M. Austin, J. Schmitt, R. G. T. Zegers, Ashton Falduto, D. Weisshaar, R. Titus, C. J. Guess, P. C. Bender, B. Gao, D. Bazin, Kenjiro Miki, Shumpei Noji, T. N. Ginter, C. Sullivan, Brenden Longfellow, S. Lipschutz, J. Pereira, and B. A. Brown

Subjects
Physics, 010308 nuclear & particles physics, Electron capture, 01 natural sciences, Nuclear physics, symbols.namesake, Supernova, Pauli exclusion principle, Distribution (mathematics), 0103 physical sciences, Quasiparticle, symbols, 010306 general physics, Excitation, Order of magnitude, Energy (signal processing)
Abstract

The Gamow-Teller strength distribution from ${}^{88}$Sr was extracted from a $(t,{}^{3}\text{He}+\gamma)$ experiment at 115 MeV/$u$ to constrain estimates for the electron-capture rates on nuclei around $N=50$, between and including $^{78}$Ni and $^{88}$Sr, which are important for the late evolution of core-collapse supernovae. The observed strength below an excitation energy of 8 MeV was consistent with zero and below 10 MeV amounted to $0.1\pm0.05$. Except for a very-weak transition that could come from the 2.231-MeV $1^{+}$ state, no $\gamma$ lines that could be associated with the decay of known $1^{+}$ states were identified. The derived electron-capture rate from the measured strength distribution is more than an order of magnitude smaller than rates based on the single-state approximation presently used in astrophysical simulations for most nuclei near $N=50$. Rates based on shell-model and quasiparticle random-phase approximation calculations that account for Pauli blocking and core-polarization effects provide better estimates than the single-state approximation, although a relatively strong transition to the first $1^{+}$ state in $^{88}$Rb is not observed in the data. Pauli unblocking effects due to high stellar temperatures could partially counter the low electron-capture rates. The new data serves as a zero-temperature benchmark for constraining models used to estimate such effects.

Published
2019

4. Coulomb dissociation of $^{16}$O into $^{4}$He and $^{12}$C

Author

Markus Reich, Zsolt Fülöp, Ralf Plag, J. Benlliure, D. Cortina-Gil, Marcel Heine, T. Kröll, H. Törnqvist, A. Kelic-Heil, Kafa Khasawneh, B. Thomas, Tanja Heftrich, Joochun Park, O. Kiselev, Håkan T Johansson, Haik Simon, Tahani Almusidi, Olof Tengblad, Christopher Lehr, Ángel Perea, Lukas Ponnath, Thomas Nilsson, H. Alvarez-Pol, Sonja Storck, C. Caesar, Junki Tanaka, Heiko Scheit, Bastian Löher, Z. Slavkovská, M. Volknandt, rey Danilov, Konrad Schmidt, Sonia Escribano Rodriguez, Rene Reifarth, Isabell Deuter, Enrique Casarejos, T. Hensel, Deniz Kurtulgil, Liam Atkins, Anna-Lena Hartig, Lukas Bott, B. Brückner, Armel Kamenyero, Silvia Murillo Morales, Yuri A. Litvinov, S. Fiebiger, Jan Glorius, Matthias Holl, Igor Gašparić, Hendrik Schulte, Romana Popocovski, Enis Lorenz, José L. Sánchez, Stefan Typel, V. Wagner, Viktor Starostin, Stefanos Paschalis, Deniz Savran, David Gonzales Caamaño, Leonard Brandenburg, Daniel Körper, Felix Wamers, Ashton Falduto, Christoph Langer, Björn Jonson, Christian Sürder, María José García Borge, P. Erbacher, László Varga, N. Kurz, Philipp Klenze, Dmytro Kresan, Klaus Volk, Alexander Grein, Marvin Kohls, Kathrin Göbel, Pablo Cabanelas Eiras, Han-Bum Rhee, Roman Gernhäuser, Lorenzo Zanetti, Daniel Bemmerer, Konstanze Boretzky, Enrique Nácher, reas Heinz, D. M. Rossi, Leonid Chulkov, Mario Weigand, Joakim Cederkäll, Michael Heil, Nasser Kalantar-Nayestanaki, Marina Petri, Thomas Aumann, Henning Heggen, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Energy and Sustainability Research Institute Groni, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Technische Universität Darmstadt, Federal Ministry of Education and Research (Germany), and Croatian Science Foundation

Subjects
Paper, History, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Dissociation (chemistry), Education, Ion, Nuclear physics, nucleosynthesis, 12C(α, γ)16O, Coulomb dissociation, R3B setup, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, Coulomb, Nuclear fusion, ddc:530, 010306 general physics, Physics, 010308 nuclear & particles physics, Scattering, Charge number, ddc, Computer Science Applications, Nucleon
Abstract

8 pags., 3 figs., We measured the Coulomb dissociation of 16O into 4He and 12C at the R3B setup in a first campaign within FAIR Phase 0 at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt. The goal was to improve the accuracy of the experimental data for the 12C(α,γ)16O fusion reaction and to reach lower center-ofmass energies than measured so far. The experiment required beam intensities of 109 16O ions per second at an energy of 500 MeV/nucleon. The rare case of Coulomb breakup into 12C and 4He posed another challenge: The magnetic rigidities of the particles are so close because of the same mass-to-charge-number ratio A/Z = 2 for 16O, 12C and 4He. Hence, radical changes of the R3B setup were necessary. All detectors had slits to allow the passage of the unreacted 16O ions, while 4He and 12C would hit the detectors’ active areas depending on the scattering angle and their relative energies. We developed and built detectors based on organic scintillators to track and identify the reaction products with sufficient precision., This project was carried out within FAIR Phase 0 at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt. This project was supported by the Bundesministerium für Bildung und Forschung (BMBF) (05P19RFFN1, 05P15RFFN1, 05P15RDFN1), HGS-HIRE, HIC for FAIR and the GSI-TU Darmstadt cooperation agreement. I. Gašparić and R. Popočovski have been supported by the Croatian Science Foundation under projects no. 1257 and 7194.

Published
2019

Catalog

Books, media, physical & digital resources
See catalog results