H. Vignau’s research while affiliated with University of Cuenca del Plata and other places

Using an electron-gamma directional correlation spectrometer, the mixing ratios of the 280 keV and 265 keV transitions have been measured. The experimental results are delta280 = -0.250-0.009+0.008 and delta265 = -0.044-0.017+0.016. The multipolarities of these transitions and the K-conversion coefficient of the 280 keV transition deduced from this information are given. For the 136 keV transition, the L-shell particle parameter was measured. The result b2L(E1) = -1.609+/-0.252 is in agreement with the theoretical value.

Ratios between the cross-sections as a function of deuteron energy have been experimentally determined for the isomers 134mCs, 134Cs produced by the reaction 133Cs (d, p)134C and for the isomers 133mBa and 133Ba produced by the reaction 133Cs (d, 2n)133Ba.

Yield ratios for the isomeric pair 44mSc, 44Sc formed in (d,t) reaction on 45Sc have been experimentally determined. By means of the stacked foils technique, deuterons energy was varied from the threshold for the studied reaction up to 28·6 MeV.

The isomer yield ratios for the 58Co isomers produced by (d, t) reactions have been investigated from threshold to 26 MeV. Experimental results are briefly discussed.

The variation of the yield ratio between the isomeric pair formed in the reaction for deuteron energies up to 27 MeV has been measured.