Unveiling the two-proton halo character of 17Ne: Exclusive measurement of quasi-free proton-knockout reactions
Artikel i vetenskaplig tidskrift, 2022
The proton drip-line nucleus 17Ne is investigated experimentally in order to determine its two-proton halo character. A fully exclusive measurement of the 17Ne(p,2p)16F→15⁎O+p quasi-free one-proton knockout reaction has been performed at GSI at around 500 MeV/nucleon beam energy. All particles resulting from the scattering process have been detected. The relevant reconstructed quantities are the angles of the two protons scattered in quasi-elastic kinematics, the decay of 16F into 15O (including γ decays from excited states) and a proton, as well as the 15O+p relative-energy spectrum and the 16F momentum distributions. The latter two quantities allow an independent and consistent determination of the fractions of l=0 and l=2 motion of the valence protons in 17Ne. With a resulting relatively small l=0 component of only around 35(3)%, it is concluded that 17Ne exhibits a rather modest halo character only. The quantitative agreement of the two values deduced from the energy spectrum and the momentum distributions supports the theoretical treatment of the calculation of momentum distributions after quasi-free knockout reactions at high energies by taking into account distortions based on the Glauber theory. Moreover, the experimental data allow the separation of valence-proton knockout and knockout from the 15O core. The latter process contributes with 11.8(3.1) mb around 40% to the total proton-knockout cross section of 30.3(2.3) mb, which explains previously reported contradicting conclusions derived from inclusive cross sections.
Författare
C. Lehr
Technische Universität Darmstadt
F. Wamers
Helmholtz
Technische Universität Darmstadt
F. Aksouh
Helmholtz
Technische Universität Darmstadt
Y. Aksyutina
Helmholtz
H. Alvarez-Pol
Universidade de Santiagode Compostela
L. Atar
Helmholtz
Technische Universität Darmstadt
T. Aumann
Technische Universität Darmstadt
Helmholtz
Helmholtz Forschungsakademie Hessen für FAIR (HFHF)
S. Beceiro-Novo
Universidade de Santiagode Compostela
C.A. Bertulani
Texas A&M University
K. Boretzky
Helmholtz
M. Borge
CSIC - Instituto de Estructura de la Materia (IEM)
C. Caesar
Helmholtz
Technische Universität Darmstadt
M. Chartier
University of Liverpool
A. Chatillon
Helmholtz
L. V. Chulkov
Helmholtz
National Research Centre "Kurchatov Institute"
D. Cortina-Gil
Universidade de Santiagode Compostela
Paloma Diaz Fernandez
Chalmers, Fysik, Subatomär fysik och plasmafysik
Universidade de Santiagode Compostela
H. Emling
Helmholtz
O. Ershova
Johann Wolfgang Goethe Universität Frankfurt am Main
Helmholtz
L. M. Fraile
Universidad Complutense de Madrid
H. O. U. Fynbo
Aarhus Universitet
D. Galaviz
CSIC - Instituto de Estructura de la Materia (IEM)
H. Geissel
Helmholtz
M. Heil
Helmholtz
M. Heine
Technische Universität Darmstadt
D. H.H. Hoffmann
Technische Universität Darmstadt
Matthias Holl
Technische Universität Darmstadt
Helmholtz
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
Håkan T Johansson
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
Björn Jonson
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
C. Karagiannis
Helmholtz
O. A. Kiselev
Helmholtz
J. V. Kratz
Johannes Gutenberg-Universität Mainz
R. Kulessa
Uniwersytet Jagiellonski w Krakowie
N. Kurz
Helmholtz
C. Langer
Johann Wolfgang Goethe Universität Frankfurt am Main
Helmholtz
Mattias Lantz
Chalmers, Fysik
T. Le Bleis
Technische Universität München
Helmholtz
R. Lemmon
Cockcroft Institute
Y. Litvinov
Helmholtz
B. Loher
Technische Universität Darmstadt
Helmholtz
K. Mahata
Helmholtz
Bhabha Atomic Research Centre (BARC)
J. Marganiec-Gałazka
Technische Universität Darmstadt
C. Muntz
Johann Wolfgang Goethe Universität Frankfurt am Main
Thomas Nilsson
Chalmers, Fysik
C. Nociforo
Helmholtz
W. Ott
Helmholtz
V. Panin
Technische Universität Darmstadt
Helmholtz
S. Paschalis
University of Liverpool
Helmholtz
A. Perea
CSIC - Instituto de Estructura de la Materia (IEM)
R. Plag
Helmholtz
Johann Wolfgang Goethe Universität Frankfurt am Main
R. Reifarth
Johann Wolfgang Goethe Universität Frankfurt am Main
Helmholtz
A. Richter
Technische Universität Darmstadt
K. Riisager
Aarhus Universitet
C. Rodriguez-Tajes
Universidade de Santiagode Compostela
D. M. Rossi
Technische Universität Darmstadt
Johannes Gutenberg-Universität Mainz
Helmholtz
D. Savran
Helmholtz
H. Scheit
Technische Universität Darmstadt
G. Schrieder
Technische Universität Darmstadt
P. Schrock
Technische Universität Darmstadt
H. Simon
Helmholtz
J. Stroth
Helmholtz
Johann Wolfgang Goethe Universität Frankfurt am Main
K. Summerer
Helmholtz
O. Tengblad
CSIC - Instituto de Estructura de la Materia (IEM)
H. Weick
Helmholtz
C. Wimmer
Johann Wolfgang Goethe Universität Frankfurt am Main
Helmholtz
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 827 136957Exotiska nukleära system vid gränsen för existens - fysik i frontlinjen med perspektiv mot FAIR
Vetenskapsrådet (VR) (2017-03839), 2018-01-01 -- 2021-12-31.
Ämneskategorier
Acceleratorfysik och instrumentering
Subatomär fysik
Fundament
Grundläggande vetenskaper
DOI
10.1016/j.physletb.2022.136957