Gamma radiation in the 143Nd (n, n', γ) reaction on fast neutrons of the reactor

Gamma radiation spectrum in the 143Nd(n, n', γ) reaction with the target of Nd2O3 enriched up to 83% in 143Nd has been measured under the angle of 90 deg to the fast neutron beam with Ge(Li) detector. The energies and intensities of 86 γ-transitions, which are placed in the scheme consisting of 37 levels, have been determined in the energy range of 90-2600 keV. The characteristics of the following levels are defined more exactly: 1228.29 (13/2+), 1407.28 (9/2-), 1431.49 (11/2-), 1739.12 (9/2-), 1851.96 (7/2-, 9/2-), 1852.78 (3/2-), 1910.74 (5/2-), 1988.24 (11/2-), 2011.49 (7/2-), 2019.17 (15/2+), 2075.39 (11/2+), 2094.53 (11/2-), 2135.17 (7/2-), 2186.43 (7/2-), 2197.31 (11/2-), 2398.85 (7/2-, 9/2-), 2483.42 (11/2+, 13/2+), 2556.67 (5/2-, 7/2-). Unplaced transitions allow us to suppose an existence of several unknown levels with I=5/2-9/2 in the energy interval 2.5-3.0 MeV, which arise in the given reaction