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

Abstract

Background: The unexplained disagreement in the dependence of spectroscopic factors (C2Sexp) 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 Ne17 beam with an energy of 500 MeV/u incident on C and CH2 targets. Through the standard theoretical approach, C2Sexp were derived from the analysis of the experimental data on proton ejection from the proton halo in Ne17 as well as from its core O15. Result: For the C target, proton ejection from the proton halo gave C2Sexp about 37% smaller than for the H target. But when protons are ejected from the core of Ne17, C2Sexp are identical within statistical uncertainties. Conclusion: An explanation for the difference in C2Sexp could be the removal of both halo protons, a more important reaction pathway for the C target. The C2Sexp 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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Item Type:	Article
Authors/Creators:	Wamers, F. Lehr, C. Marganiec-Gałązka, J. Aksouh, F. Aksyutina, Yu Álvarez-Pol, H. Atar, L. Aumann, T. Beceiro-Novo, S. Bertulani, C. A. Boretzky, K. Borge, M. J.G. Caesar, C. Chartier, M. Chatillon, A. Chulkov, L. V. Cortina-Gil, D. Díaz Fernández, P. Emling, H. Ershova, O. Fraile, L. M. Fynbo, H. O.U. Galaviz, D. Geissel, H. Heil, M. Holl, M. Johansson, H. T. Jonson, B. Karagiannis, C. Kiselev, O. A. Kulessa, R. Kurz, N. Langer, C. Lantz, M. Le Bleis, T. Lemmon, R. Litvinov, Yu A. Mahata, K. Müntz, C. Nilsson, T. Nociforo, C. Panin, V. Paschalis, S. https://orcid.org/0000-0002-9113-3778 Perea, A. Plag, R. Reifarth, R. Richter, A. Riisager, K. Rodriguez-Tajes, C. Rossi, D. Savran, D. Scheit, H. Schrieder, G. Simon, H. Stroth, J. Sümmerer, K. Tengblad, O. Typel, S. Weick, H.
Copyright, Publisher and Additional Information:	Funding Information: This work is supported by the German Federal Ministry for Education and Research (BMBF) under Contract No. 05P15RDFN1, and the GSI-TU Darmstadt cooperation agreement. This work was partly supported by the Spanish Funding Agency MCIN/AEI/10.13039/501100011033 and FEDER under Grants No. RTI2018-098868-B-I00, No. PID2019-104390GB-I00, No. PID2021-126998OB-I00, and No. PDI2022-140162-I00. C.A.B. acknowledges support by U.S. DOE Grant No. DE-FG02-08ER41533 and the Helmholtz Research Academy Hesse for FAIR. Publisher Copyright: © 2024 authors. Published by the American Physical Society.
Dates:	Accepted: 28 March 2024 Published: 3 May 2024
Institution:	The University of York
Academic Units:	The University of York > Faculty of Sciences (York) > Physics (York)
Depositing User:	Pure (York)
Date Deposited:	07 Jun 2024 12:30
Last Modified:	10 Apr 2025 23:37
Published Version:	https://doi.org/10.1103/PhysRevC.109.054602
Status:	Published
Refereed:	Yes
Identification Number:	10.1103/PhysRevC.109.054602
Related URLs:	http://www.scopus.com/inward/record.url?...
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:213224

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

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

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