RT Journal Article
T1 Exclusive measurements of quasi-free proton scattering reactions in inverse and complete kinematics
A1 Panin, V.
A1 Taylor, J. T.
A1 Paschalis, S.
A1 Wamers, F.
A1 Aksyutina, Y.
A1 Álvarez Pol, Héctor
A1 Aumann, T.
A1 Bertulani, C. A.
A1 Boretzky, K.
A1 Caesar, C.
A1 Chartier, M.
A1 Chulkov, L. V.
A1 Cortina Gil, María Dolores
A1 Enders, J.
A1 Ershova, O.
A1 Geissel, H.
A1 Gernhäuser, R.
A1 Heil, M.
A1 Johansson, H. T.
A1 Jonson, B.
A1 Kelić-Heil, A.
A1 Langer, C.
A1 Le Bleis, T.
A1 Lemmon, R.
A1 Nilsson, T.
A1 Petri, M.
A1 Plag, R.
A1 Reifarth, R.
A1 Rossi, D.
A1 Scheit, H.
A1 Simon, H.
A1 Weick, H.
A1 Wimmer, C.
K1 Quasi-free scattering
K1 Inverse kinematics
K1 Single-particle states
K1 Spectroscopic factors
AB Quasi-free scattering reactions of the type (p, 2p) were measured for the first time exclusively in completeand inverse kinematics, using a 12C beam at an energy of ∼400 MeV/u as a benchmark. This newtechnique has been developed to study the single-particle structure of exotic nuclei in experiments withradioactive-ion beams. The outgoing pair of protons and the fragments were measured simultaneously,enabling an unambiguous identification of the reaction channels and a redundant measurement of thekinematic observables. Both valence and deeply-bound nucleon orbits are probed, including those leadingto unbound states of the daughter nucleus. Exclusive (p, 2p) cross sections of 15.8(18) mb, 1.9(2) mb and1.5(2) mb to the low-lying 0p-hole states overlapping with the ground state (3/2−) and with the boundexcited states of 11B at 2.125 MeV (1/2−) and 5.02 MeV (3/2−), respectively, were determined via γ -rayspectroscopy. Particle-unstable deep-hole states, corresponding to proton removal from the 0s-orbital,were studied via the invariant-mass technique. Cross sections and momentum distributions were extractedand compared to theoretical calculations employing the eikonal formalism. The obtained resultsare in a good agreement with this theory and with direct-kinematics experiments. The dependence ofthe proton–proton scattering kinematics on the internal momentum of the struck proton and on its separationenergy was investigated for the first time in inverse kinematics employing a large-acceptancemeasurement.
PB Elsevier
SN 0370-2693
YR 2016
FD 2016
LK http://hdl.handle.net/10347/22756
UL http://hdl.handle.net/10347/22756
LA eng
NO Panin, V., Taylor, J. T., Paschalis, S., Wamers, F., Aksyutina, Y., Alvarez-Pol, H., ... & Chartier, M. (2016). Exclusive measurements of quasi-free proton scattering reactions in inverse and complete kinematics. Physics Letters B, 753, 204-210
NO The authors acknowledge support from HIC for FAIR, the GSI-TU Darmstadt cooperation agreement, the BMBF under Contract No. 05P12RDFN8, the Helmholtz Alliance EMMI, the Swedish Re-search Council, the U.S. NS Grant No. 1415656, the DOE grant No. DE-FG02-08ER41533 and the Spanish research agency CICYT under Project No. FPA2009-07387
DS Minerva
RD 24 abr 2026