Angular dependence in proton-proton correlation functions in central 40 Ca + 40 Ca and 48 Ca + 48 Ca reactions
Year: 2012
Type: article
Abstract: The angular dependence of proton-proton correlation functions is studied in central ${}^{\text{40}}\text{Ca}+{\phantom{\rule{0.16em}{0ex}}}^{\text{40}}\text{Ca}$ and ${}^{\text{48}}\text{Ca}+{\phantom{\rule{0.16em}{0ex}}}^{\text{48}}\text{Ca}$ nuclear reactions at $E/A=80$ MeV. Measurements were performed with the High Resolution Array (HiRA) complemented by the 4$\ensuremath{\pi}$ Array at the National Superconducting Cyclotron Laboratory. A striking angular dependence in the laboratory frame is found within proton-proton correlation functions for both systems that greatly exceeds the measured and expected isospin dependent difference between the neutron-rich and neutron-deficient systems. Sources measured at backward angles reflect the participant zone of the reaction, while much larger sources observed at forward angles reflect the expanding, fragmenting, and evaporating projectile remnants. The decrease of the size of the source with increasing momentum is observed at backward angles while a weaker trend in the opposite direction is observed at forward angles. The results are compared to the theoretical calculations using the Boltzmann-Uehling-Uhlenbeck (BUU) transport model.
Source: Physical Review C
Authors: V. Henzl, M. A. Kilburn, Z. Chajęcki, D. Henzlova, W. G. Lynch, D. Brown, A. Chbihi, D. D. S. Coupland, P. Danielewicz, R. T. deSouza, M. Famiano, C. Herlitzius, S. Hudan, Jenny Lee, S. Lukyanov, A. M. Rogers, A. Sanetullaev, L. G. Sobotka, Z. Y. Sun, M. B. Tsang, A. Vander Molen, G. Verde, M. S. Wallace, M. Youngs
Institutions: National Superconducting Cyclotron Laboratory, Michigan State University, Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Institut National de Physique Nucléaire et de Physique des Particules, Grand Accélérateur National d'Ions Lourds, Indiana University Bloomington, Indiana University, Western Michigan University, Joint Institute for Nuclear Astrophysics, Joint Institute for Nuclear Research, Washington University in St. Louis, Chinese Academy of Sciences, Institute of Modern Physics, Istituto Nazionale di Fisica Nucleare, Sezione di Catania
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2056490446