2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C 17, 83-95
DOI 10.1007/s100520000465

Measurement of spin observables
in neutron-proton elastic scattering

Part II: Rescattering parameters

J. Arnold2 - B. van den Brandt3 - M. Daum3 - Ph. Demierre1 - M. Finger4,5 - M. Finger,Jr.5 - J. Franz2 - N. Goujon-Naef1 - P. Hautle3 - R. Hess1 - A. Janata5 - J.A. Konter3 - H. Lacker2 - C. Lechanoine-Leluc1 - F. Lehar6 - S. Mango3 - D. Rapin1 - E. Rössle2 - P.A. Schmelzbach3 - H. Schmitt2 - P. Sereni2 - M. Slunecka4,5 - A. Teglia1,3 - B. Vuaridel1

1 DPNC, Université de Genève, 1211 Genève4, Switzerland
2 Fakultät für Physik der Universität Freiburg, 79104 Freiburg, Germany
3 PSI, Paul-Scherrer-Institut, 5232 Villigen-PSI, Switzerland
4 MFF, Karlova Universita, 18000 Praha, Czech Republic
5 LNP, Joint Institute for Nuclear Research, 141980 Dubna, Russia
6 DAPNIA/SPP, CEA/Saclay, 91191 Gif-sur-Yvette (CEDEX) France

Received: 24 May 2000 / Published online: 31 August 2000 - © Springer-Verlag 2000

A double scattering experiment, performed at the Paul-Scherrer-Institut (PSI), has measured a large variety of spin observables for free np elastic scattering from 260 to 535 MeV in the c.m. angle range from 60$^\circ$ to 164$^\circ$. Results are presented for the depolarization parameters Donon, Dos''os and Dos''ok, the polarization transfer parameters Konno, Kos''so and Kos''ko, and the 3-index parameters Nonkk, Nos''kn, Nos''sn and Nos''ns. The last four parameters have been measured for the first time in this energy range. These measurements considerably improve the data base available for neutron-proton scattering and will allow a direct reconstruction of the I = 0 scattering matrix, providing complete information about the nucleon-nucleon interaction in a model-independent way.

Copyright Società Italiana di Fisica, Springer-Verlag 2000