One-neutron knockout from Sc51-55

S. Schwertel; P. Maierbeck; R. Kruecken; R. Gernhaeuser; T. Kroell; H. Alvarez-Pol; F. Aksouh; T. Aumann; K. Behr; E. A. Benjamim; J. Benlliure; V. Bildstein; M. Boehmer; K. Boretzky; M. J. G. Borge; A. Bruenle; A. Burger; M. Caamano; E. Casarejos; A. Chatillon; L. V. Chulkov; D. Cortina-Gil; J. Enders; K. Eppinger; T. Faestermann; J. Friese; L. Fabbietti; M. Gascon; H. Geissel; J. Gerl; M. Gorska; P. G. Hansen; B. Jonson; R. Kanungo; O. Kiselev; I. Kojouharov; A. Klimkiewicz; T. Kurtukian; N. Kurz; K. Larsson; T. Le Bleis; K. Mahata; L. Maier; T. Nilsson; C. Nociforo; G. Nyman; C. Pascual-Izarra; A. Perea; D. Perez; A. Prochazka; C. Rodriguez-Tajes; D. Rossi; H. Schaffner; G. Schrieder; H. Simon; B. Sitar; M. Stanoiu; K. Suemmerer; O. Tengblad; H. Weick; S. Winkler; B. A. Brown; T. Otsuka; J. A. Tostevin; W. D. M. Rae

doi:10.1140/epja/i2012-12191-5

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One-neutron knockout from Sc51-55

S. Schwertel, P. Maierbeck, R. Kruecken, R. Gernhaeuser, T. Kroell, H. Alvarez-Pol, F. Aksouh, T. Aumann, K. Behr, E. A. Benjamim, …

The European physical journal. A, Hadrons and nuclei, Vol.48(12), p.191

01/12/2012

DOI: https://doi.org/10.1140/epja/i2012-12191-5

Abstract

Physical Sciences

Physics

Physics, Nuclear

Physics, Particles & Fields

Science & Technology

Results are presented from a one-neutron knockout experiment at relativistic energies of approximate to 420 A MeV on Sc51-55 using the GSI Fragment Separator as a two-stage magnetic spectrometer and the Miniball array for gamma-ray detection. Inclusive longitudinal momentum distributions and cross-sections were measured enabling the determination of the contributions corresponding to knockout from the nu p(1/2), nu p(3/2), (L = 1) and nu f(7/2), nu f(5/2) (L = 3) neutron orbitals. The observed L = 1 and L = 3 contributions are compared with theoretical cross-sections using eikonal knockout theory and spectroscopic factors from shell model calculations using the GXPF1A interaction. The measured inclusive knockout cross-sections generally follow the trends expected theoretically and given by the spectroscopic strength predicted from the shell model calculations. However, the deduced L = 1 cross-sections are generally 30-40% higher while the L = 3 contributions are about a factor of two smaller than predicted. This points to a promotion of neutrons from the nu f(7/2) to the nu p(3/2) orbital indicating a weakening of the N = 28 shell gap in these nuclei. While this is not predicted for the phenomenological GXPF1A interaction such a weakening is predicted by recent calculations using realistic low-momentum interactions V-lowk obtained by evolving a chiral N3LO nucleon-nucleon potential.

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Title: One-neutron knockout from Sc51-55
Creators - without role: S. Schwertel - Technical University of Munich
P. Maierbeck - Technical University of Munich
R. Kruecken - Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany
R. Gernhaeuser - Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany
T. Kroell - Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany
H. Alvarez-Pol - Universidade de Santiago de Compostela
F. Aksouh - GSI Helmholtz Centre for Heavy Ion Research
T. Aumann - GSI Helmholtz Centre for Heavy Ion Research
K. Behr - GSI Helmholtz Centre for Heavy Ion Research
E. A. Benjamim - Universidade de Santiago de Compostela
J. Benlliure - Universidade de Santiago de Compostela
V. Bildstein - Technical University of Munich
M. Boehmer - Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany
K. Boretzky - GSI Helmholtz Centre for Heavy Ion Research
M. J. G. Borge - Instituto de Estructura de la Materia
A. Bruenle - GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany
A. Burger - University of Oslo
M. Caamano - Universidade de Santiago de Compostela
E. Casarejos - Universidade de Vigo
A. Chatillon - GSI Helmholtz Centre for Heavy Ion Research
L. V. Chulkov - GSI Helmholtz Centre for Heavy Ion Research
D. Cortina-Gil - Universidade de Santiago de Compostela
J. Enders - Technical University of Darmstadt
K. Eppinger - Technical University of Munich
T. Faestermann - Technical University of Munich
J. Friese - Technical University of Munich
L. Fabbietti - Technical University of Munich
M. Gascon - Universidade de Santiago de Compostela
H. Geissel - GSI Helmholtz Centre for Heavy Ion Research
J. Gerl - GSI Helmholtz Centre for Heavy Ion Research
M. Gorska - GSI Helmholtz Centre for Heavy Ion Research
P. G. Hansen - Michigan State University
B. Jonson - Chalmers University of Technology
R. Kanungo - GSI Helmholtz Centre for Heavy Ion Research
O. Kiselev - GSI Helmholtz Centre for Heavy Ion Research
I. Kojouharov - GSI Helmholtz Centre for Heavy Ion Research
A. Klimkiewicz - GSI Helmholtz Centre for Heavy Ion Research
T. Kurtukian - Universidade de Santiago de Compostela
N. Kurz - GSI Helmholtz Centre for Heavy Ion Research
K. Larsson - GSI Helmholtz Centre for Heavy Ion Research
T. Le Bleis - GSI Helmholtz Centre for Heavy Ion Research
K. Mahata - GSI Helmholtz Centre for Heavy Ion Research
L. Maier - Technical University of Munich
T. Nilsson - Chalmers University of Technology
C. Nociforo - GSI Helmholtz Centre for Heavy Ion Research
G. Nyman - Chalmers University of Technology
C. Pascual-Izarra - Instituto de Estructura de la Materia
A. Perea - Instituto de Estructura de la Materia
D. Perez - Universidade de Santiago de Compostela
A. Prochazka - GSI Helmholtz Centre for Heavy Ion Research
C. Rodriguez-Tajes - Universidade de Santiago de Compostela
D. Rossi - Johannes Gutenberg University Mainz
H. Schaffner - GSI Helmholtz Centre for Heavy Ion Research
G. Schrieder - Technical University of Darmstadt
H. Simon - GSI Helmholtz Centre for Heavy Ion Research
B. Sitar - Comenius University Bratislava
M. Stanoiu - GSI Helmholtz Centre for Heavy Ion Research
K. Suemmerer - GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany
O. Tengblad - Instituto de Estructura de la Materia
H. Weick - GSI Helmholtz Centre for Heavy Ion Research
S. Winkler - Technical University of Munich
B. A. Brown - Universidade de Vigo
T. Otsuka - The University of Tokyo
J. A. Tostevin - University of Surrey
W. D. M. Rae
Publication Details: The European physical journal. A, Hadrons and nuclei, Vol.48(12), p.191
Publisher: Springer Nature
Number of pages: 10
Grant note: DFG cluster of excellence Origin and Structure of the Universe; German Research Foundation (DFG) 1068217 / Direct For Mathematical & Physical Scien; Division Of Physics; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) RII3-CT-2004-506065 / European Commission within the Sixth Framework Programme through I3-EURONS; European Union (EU); European Commission Joint Research Centre ST/J000051 / United Kingdom Science and Technology Facilities Council (STFC); UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) 06MT238; 06MT9156 / BMBF; Federal Ministry of Education & Research (BMBF)
Identifiers: 9949753208331
Academic Unit: King Saud University
Language: English
Resource Type: Journal article