ISOMERIC CROSS-SECTION RATIO FOR THE (N,2N) REACTION ON SC-45 FROM 13.6 TO 14.9 MEV

The isomeric cross section ratio sigma(m)/sigma(g) for the reaction Sc -45(n,2n) Sc-44(m,g) was measured in the neutron energy range of 13.6- 14.9 MeV for six different neutron energies. The neutrons were produce d by the H-3(d,n)He-4 reaction utilizing a SAMES T-400 neutron generat or. Isomeric cross section ratios were determined by applying the meth od of least squares to the time behavior of the ground-state decay of isomeric pair. The absolute cross section for the formation of the met astable state was measured by the usual activation technique. The grou nd-state cross section was then obtained by using the absolute truss s ection of the metastable state and isomeric cross section ratio for ea ch neutron energy. Experimental cross section values and isomeric cros s section ratios were compared with those obtained by a statistical mo del calculation.