Three-Body Correlations In $^{6}$He Revealed In The Quasi-Free Knockout Reaction $^{4}He($^{6}$He,2$\alpha$)2n

• Published in: AIP Conference Proceedings
• Main Authors: I. Sidorchuk, S., S. Fomichev, A., S. Golovkov, M., A. Gorshkov, V., V. Gorshkov, A., Krupko, S.A., Ts. Oganessian, Yu., M. Rodin, A., S. Slepnev, R., V. Stepantsov, S., M. Ter-Akopian, G., Wolski, R., A. Korsheninnikov, A., Yu. Nikolskii, E., Roussel-Chomaz, P., Mittig, W.
• Other Authors: RIKEN Nishina Center for Accelerator-Based Science Wako (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research Japon (RIKEN), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Yu. E. Penionzhkevich, E. A. Cherepanov
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2006
• Subjects: quasi-free reactions; knock-out reactions; helium; nuclei with mass number 6 to 19; 21.45.+v; 24.50.+g; 25.60.Gc; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]; khanty
• Online Access: https://hal.in2p3.fr/in2p3-00158770; https://doi.org/10.1063/1.2746579

International audience The 4He(6He,2$\alpha$)2n reaction was studied in experiments designed for the observation of a quasi-free scattering (QFS) occurring between the $\alpha$ core of the Borromean 6He nuclei and the 4He target nuclei. The helium gas target cooled down to 14 K was bombarded by a 25A MeV secondary beam of 6He nuclei produced at the fragment separator ACCULINNA (Dubna). The data were analyzed with the use of the Plane Wave Impulse Approximation (PWIA) and the three-body wave function of 6He and taking into account the n − n final state interaction. Correlation obtained in the reaction exit channel between the momentum values characteristic to the $\alpha$-2n and n-n subsystems were found to be consistent with the PWIA predictions. This suggests that QFS could be suitable for the study of other Borromean nuclei.