open access publication

Article, 2024

New insight into knockout reactions from the two-proton halo nucleus 17Ne

PHYSICAL REVIEW C, ISSN 2469-9985, 2469-9985, Volume 109, 5, 10.1103/PhysRevC.109.054602

Contributors

Wamers, F. (Corresponding author) [1] [2] Lehr, C. [3] Marganiec-Galazka, J. [3] [4] Aksouh, F. [1] [2] [5] Aksyutina, Yu [1] [2] Alvarez-Pol, H. [6] Atar, L. [3] Aumann, T. [1] [2] [3] Beceiro-Novo, S. [6] Bertulani, C. A. [7] Boretzky, K. [1] [2] Borge, M. J. G. [8] [9] Caesar, C. [1] [2] [3] [10] Chartier, M. [11] Chatillon, A. [1] [2] Chulkov, L. [1] [2] [12] Cortina-Gil, D. [6] Fernandez, P. Diaz [13] Emling, H. [1] [2] Ershova, O. [10] Fraile, L. M. [14] Fynbo, H. 0000-0003-0316-4548 [15] Galaviz, D. [8] [9] Geissel, H. [1] [2] Heil, M. [1] [2] Holl, M. [13] Johansson, H. T. [13] Jonson, B. [13] Karagiannis, Ceorgios Th. [1] [2] Kiselev, O.A. [1] [2] Kratz, J. V. [16] Kulessa, R. [17] Kurz, Nathan [1] [2] Langer, C. [18] Lantz, M. [19] Le Bleis, T. [1] [2] Lemmon, R 0000-0002-1259-979X [20] Litvinov, Yu. A. [1] [2] Mahata, K. [1] [2] Muentz, C. [1] [2] Nilsson, T. [13] Nociforo, C. [1] [2] Panin, V. [1] [2] [3] Paschalis, S. [7] [21] Perea, A. [15] [16] [17] [18] [19] [20] Plag, R. [1] [2] [10] Reifarth, R. [1] [2] [10] Richter, A. [3] Riisager, K. [10] Rodriguez-Tajes, C. [6] Rossi, D. [3] Savran, D. [1] [2] Scheit, H. [1] [2] Schrieder, G. [3] Simon, H. [1] [2] Stroth, J. [10] Suemmerer, K. [1] [2] Tengblad, O. [8] [9] Typel, S. [1] [2] Weick, H. [1] [2]

Affiliations

  1. [1] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany
    2. [NORA names: Germany; Europe, EU; OECD];
  2. [2] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany
    3. [NORA names: Germany; Europe, EU; OECD];
  3. [3] Tech Univ, Inst Kernphys, D-64289 Darmstadt, Germany
    4. [NORA names: Germany; Europe, EU; OECD];
  4. [4] Natl Ctr Nucl Res, Radioisotope Ctr POLATOM POLATOM, Andrzeja Soltana 7, PL-05400 Otwock, Poland
    5. [NORA names: Poland; Europe, EU; OECD];
  5. [5] King Saud Univ, Coll Sci, Phys & Astron Dept, Riyadh 12372, Saudi Arabia
    6. [NORA names: Saudi Arabia; Asia, Middle East];

Abstract

Background: The unexplained disagreement in the dependence of spectroscopic factors ( C 2 S exp ) on the binding energy obtained by nucleon knockout using different targets is still a puzzle that needs to be addressed. Purpose: To find an explanation of this riddle through exclusive measurements using different targets. Method: The exclusive measurements were performed by using a 17 Ne beam with an energy of 500 MeV / u incident on C and CH 2 targets. Through the standard theoretical approach, C 2 S exp were derived from the analysis of the experimental data on proton ejection from the proton halo in 17 Ne as well as from its core 15 O. Result: For the C target, proton ejection from the proton halo gave C 2 S exp about 37% smaller than for the H target. But when protons are ejected from the core of 17 Ne, C 2 S exp are identical within statistical uncertainties. Conclusion: An explanation for the difference in C 2 S exp could be the removal of both halo protons, a more important reaction pathway for the C target. The C 2 S exp values obtained by analyzing the proton ejection from the core indicate that it is not affected by the interaction with the halo protons.

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