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Quasifree (p, 2p) Reactions on Oxygen Isotopes : Observation of Isospin Independence of the Reduced Single-Particle Strength

Atar, L.; Paschalis, S.; Barbieri, C.; Bertulani, C. A.; Díaz Fernández, P.; Holl, M.; Najafi, M. A.; Panin, V.; Alvarez-Pol, H. and Aumann, T., et al. (2018) In Physical Review Letters 120(5).
Abstract

Quasifree one-proton knockout reactions have been employed in inverse kinematics for a systematic study of the structure of stable and exotic oxygen isotopes at the R3B/LAND setup with incident beam energies in the range of 300-450 MeV/u. The oxygen isotopic chain offers a large variation of separation energies that allows for a quantitative understanding of single-particle strength with changing isospin asymmetry. Quasifree knockout reactions provide a complementary approach to intermediate-energy one-nucleon removal reactions. Inclusive cross sections for quasifree knockout reactions of the type OA(p,2p)NA-1 have been determined and compared to calculations based on the eikonal reaction theory. The reduction factors for the... (More)

Quasifree one-proton knockout reactions have been employed in inverse kinematics for a systematic study of the structure of stable and exotic oxygen isotopes at the R3B/LAND setup with incident beam energies in the range of 300-450 MeV/u. The oxygen isotopic chain offers a large variation of separation energies that allows for a quantitative understanding of single-particle strength with changing isospin asymmetry. Quasifree knockout reactions provide a complementary approach to intermediate-energy one-nucleon removal reactions. Inclusive cross sections for quasifree knockout reactions of the type OA(p,2p)NA-1 have been determined and compared to calculations based on the eikonal reaction theory. The reduction factors for the single-particle strength with respect to the independent-particle model were obtained and compared to state-of-the-art ab initio predictions. The results do not show any significant dependence on proton-neutron asymmetry.

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@article{613b71e4-25ef-4711-b80e-2359dca8b2ad,
  abstract     = {<p>Quasifree one-proton knockout reactions have been employed in inverse kinematics for a systematic study of the structure of stable and exotic oxygen isotopes at the R3B/LAND setup with incident beam energies in the range of 300-450 MeV/u. The oxygen isotopic chain offers a large variation of separation energies that allows for a quantitative understanding of single-particle strength with changing isospin asymmetry. Quasifree knockout reactions provide a complementary approach to intermediate-energy one-nucleon removal reactions. Inclusive cross sections for quasifree knockout reactions of the type OA(p,2p)NA-1 have been determined and compared to calculations based on the eikonal reaction theory. The reduction factors for the single-particle strength with respect to the independent-particle model were obtained and compared to state-of-the-art ab initio predictions. The results do not show any significant dependence on proton-neutron asymmetry.</p>},
  articleno    = {052501},
  author       = {Atar, L. and Paschalis, S. and Barbieri, C. and Bertulani, C. A. and Díaz Fernández, P. and Holl, M. and Najafi, M. A. and Panin, V. and Alvarez-Pol, H. and Aumann, T. and Avdeichikov, V. and Beceiro-Novo, S. and Bemmerer, D. and Benlliure, J. and Boillos, J. M. and Boretzky, K. and Borge, M. J.G. and Caamaño, M. and Caesar, C. and Casarejos, E. and Catford, W. and Cederkall, J. and Chartier, M. and Chulkov, L. and Cortina-Gil, D. and Cravo, E. and Crespo, R. and Dillmann, I. and Elekes, Z. and Enders, J. and Ershova, O. and Estrade, A. and Farinon, F. and Fraile, L. M. and Freer, M. and Galaviz Redondo, D. and Geissel, H. and Gernhäuser, R. and Golubev, P. and Göbel, K. and Hagdahl, J. and Heftrich, T. and Heil, M. and Heine, M. and Heinz, A. and Henriques, A. and Hufnagel, A. and Ignatov, A. and Johansson, H. T. and Knyazev, A. and , },
  issn         = {0031-9007},
  language     = {eng},
  month        = {01},
  number       = {5},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Quasifree (p, 2p) Reactions on Oxygen Isotopes : Observation of Isospin Independence of the Reduced Single-Particle Strength},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.120.052501},
  volume       = {120},
  year         = {2018},
}