https://doi.org/10.1140/epja/i2019-12876-1
Letter
Investigation of the quasi-free domain in deuteron-deuteron break-up using spin observables
1
Department of Physics, University of Tehran, Tehran, Iran
2
KVI-CART, University of Groningen, Groningen, The Netherlands
3
Institute of Nuclear Physics, PAS, PL-31342, Kraków, Poland
4
Institute of Physics, Jagiellonian University, Kraków, Poland
5
Department of Physics, University of Sistan and Baluchestan, Zahedan, Iran
6
Department of Physics, Faculty of Science, University of Kashan, Kashan, Iran
7
Institute of Physics, University of Silesia, Chorzów, Poland
8
Department of Physics, School of Science, Yazd University, Yazd, Iran
* e-mail: j.g.messchendorp@rug.nl
Received:
15
June
2019
Accepted:
2
September
2019
Published online:
16
October
2019
Precision measurements of vector and tensor analyzing powers of the 2H( d, dp)n break-up process for configurations in the vicinity of the quasi-free scattering regime with the neutron as spectator are presented. These measurements are performed with a polarized deuteron-beam with an energy of 65MeV/nucleon impinging on a liquid-deuterium target. The experiment was conducted at the AGOR facility at KVI using the BINA 4
-detection system. Events for which the final-state deuteron and proton are coplanar have been analyzed and the data have been sorted for various momenta of the missing neutron. In the limit of vanishing neutron momentum and at large deuteron-proton momentum transfer, the data agree well with the measured and theoretically predicted spin observables of the elastic deuteron-proton scattering process. The agreement deteriorates rapidly with increasing neutron momentum and/or decreasing momentum transfer from the deuteron beam to the outgoing proton. This study reveals the presence of a significant contribution of final-state interactions even at very small neutron momenta.
© The Author(s), 2019
