ISSN - 05562813, EISSN - 1089490X, Physical Review C - Nuclear Physics, 1998, vol. 58, p. 2667-2670
Measurement of the quasifree pn → pn η reaction
The first measurement of the cross section of the quasifree pn→pn η reaction has been carried out at the CELSIUS storage ring using a deuterium internal cluster jet target. The energy dependence of the cross section is extracted using a fixed incident proton energy of Tp, = 1350 MeV and exploiting the Fermi momentum of the struck neutron. The data cover a range of center-of-mass excess energies from 16 to 109 MeV. The shape of the excitation function is broadly similar to that of the pp→pp η reaction, though with a cross section about a factor of 6.5 larger.