Narrow Results

The negative parity yrast bands of neutron-deficient ^119–127Ba nuclei are studied by using the Projected Shell Model approach. Energy levels, transition energies and B(M1)/B(E2) ratios are calculated and compared with the available experimental data. The calculations reproduce the band head spins of negative parity yrast bands and indicate the multi-quasiparticle structure for these bands.

The projected shell model framework is employed to study the band spectra in ${}^{242-248}$Cm isotopes. The present calculations reproduce the available experimental data on the yrast bands. Besides this, B(E2) transition probabilities of even–even Cm isotopes have also been calculated. The low spin states of yrast band are seen to arise purely from zero-quasi-particle (o-qp) intrinsic states whereas the high spin states have multi-quasi-particle structure. For the odd-neutron (odd-$N$) isotopes, the calculated results qualitatively reproduce the available data on ground and lowest excited state bands for ${}^{243,245}$Cm. However, for ${}^{247}$Cm the negative-parity ground state band is in reasonable agreement with the experimental data.

Some positive and negative parity energy bands of odd-A isotopes of Europium ${}^{\text{153–159}}\text{Eu}$ have been studied within the Projected Shell Model (PSM) framework. Calculated excitation energy spectra, transition energies, E2 and M1 transition probabilities, quadrupole and magnetic moments are compared with experimental data wherever available. Reasonably good agreement is obtained with the observed data.

In this study we have used a beam generated by a clinical linac to activate an Indium sample. The beam used was generated by electrons of 18 MeV impacting on a tungsten target. The beam was mainly composed of bremsstrahlung photons with a small admixture of neutrons. The gamma-ray spectrum of the sample was recorded with a HPGe in an offline setup. Here we present the values obtained from the analysis of the spectrum. Both transition energies of several Indium isotopes as well as half-lives of some of them were obtained. The results shown were compared to the literature values. In majority of the cases there is good agreement and in some case we see significant improvement of uncertainties for transition energies. We have also measured the transition energies and half-lives of Scandium, Antimony, Bromine, Chlorine, Gallium and Praseodymium nuclei experimentally by photonuclear reaction and further results will be submitted for the publication.