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HK: Fachverband Physik der Hadronen und Kerne
HK 24: Structure and Dynamics of Nuclei IV
HK 24.4: Talk
Tuesday, February 27, 2018, 17:30–17:45, HZO 70
Proton Knockout Reactions from Neutron-Rich N Isotopes at R3B — •Ina Syndikus1,2, Marina Petri3, and Thomas Aumann1,2 for the R3B collaboration — 1IKP, TU Darmstadt, Germany — 2GSI, Germany — 3University of York, UK
The R3B/LAND setup at GSI was used to measure the proton-knockout reaction on neutron-rich N isotopes in a kinematically complete way.
The aim of this study is to determine the proton amplitude of the first 2+ excited state of 16,18,20C isotopes. This can be achieved by studying the proton-knockout reaction from 17,19,21N to 16,18,20C. By measuring the ratio of the cross sections for the population of the first excited 2+ state and the ground state the proton amplitude can be determined.
An increase in the proton amplitude approaching the dripline can be explained by the reduction of the spin-orbit splitting between the proton p3/2 and p1/2 orbits due to the tensor and two-body spin-orbit components of the force between the protons and the added neutrons in the sd-shell [1]. This would explain the increase in the transition strength as observed in previous studies [2].
This work is supported by HIC for FAIR, GSI-TU Darmstadt cooperation and the BMBF project 05P15RDFN1.
[1] A. O. Macchiavelli et al., Phys. Rev. C 90 067305 (2014)
[2] M. Petri et al., Phys. Rev. Lett. 107, 102501 (2011)