The energy and angular distribution of the a particles from the Fe(n, a) and Ni(n, o;} reactions for 14.1 MeV incident neutron energy were measured by means of a multitelescope system. The results concerning the total He-production cross sections and the angle-integrated u-emission cross sections der/dE are in fair agreement with previous measurements; for the angular distribution no detailed measurements have as yet been reported. The results are analyzed in the framework of the statistical model of nuclear reactions. Comparison of such calculations with the measured aemission cross sections allows one to extract nuclear level densities for ' Cr and Fe, the residual nuclei reached in the studied reactions in the energy region up to the neutron binding energy, and for Fe and Ni, the residual nuclei reached by neutron emission for energies around 11 MeV. Within experimental error a purely exponential increase of the level density with excitation energy was found for both ' Cr and Fe. The spin cutoff parameters for ' Cr and Fe derived from the data indicate that there is no reduction of the effective moment of inertia below the rigid body value.
Photon scattering experiments on the odd, deformed nuclei ' " Dy and ' Gd provided detailed information on the excitation energies and transition probabilities of low-lying dipole excitations. In the case of the even-even nuclei ' ' Dy in addition spins and parities of the excited states could be determined model independently by measuring the angular distributions and the linear polarization of the scattered photons using a Compton polarimeter. The results are compared with the systematics obtained for the neighboring even-even isotopes ' Dy and ' ' ' Gd in previous photon scattering experiments. Whereas in the odd Dy isotopes a concentration of dipole strength is observed, which fits nicely into the systematics of the orbital M1 mode, the dipole strength in ' Gd is completely fragmented into about 90 transitions.
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