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The cyclotron at Variable Energy Cyclotron Centre (VECC), Kolkata has recently completed its 40 years of operation in 2017. During the past four decades, VECC has been able to cross several milestones in exploring the properties of nuclei with the help of low energy light as well as heavy ions accelerated by the cyclotron. In this review, we endeavour to present an overall picture of the intense research activities in various branches of nuclear physics carried out in the past four decades using cyclotron, with special emphasis on the important achievements in each field. [ABSTRACT FROM AUTHOR]

The cyclotron at Variable Energy Cyclotron Centre (VECC), Kolkata, has recentlyrecently completed its 40 years of operation in 2017. During the past four decades, VECC has been able to cross several milestones in exploring the properties of nuclei with the help of low energy light as well as heavy ions accelerated by the cyclotron. In this review, we endeavour to present an overall picture of the intense research activities in various branches of nuclear physics carried out in the past four decades using cyclotron, with special emphasis on the important achievements in each field. [ABSTRACT FROM AUTHOR]

Resistive heating and mechanical rolling methods have been employed to prepare isotopically enriched thin target foils of 116Sn (∼380 μg/cm2), 124Sn (∼400 μg/cm2) and thicker foils of 112Sn (∼1.7 mg/cm2), 120Sn (∼1.6 mg/cm2), respectively. Preparation of enriched targets with a small amount of material, selection of releasing agent for thin targets and separation of deposited material in solvent were among the several challenges during fabrication of the thin targets. The uniformity of the targets has been measured using 241Am α-source. NaCl has been used as releasing agent in preparation of the thin targets. These targets have been successfully used in nuclear physics experiments at VECC. • Isotopically enriched targets of Sn from lowest to highest isotopes having different thicknesses have been prepared using vacuum evaporation and rolling techniques. • NaCl has been used as releasing agent for preparation of thin target. • Purity and surface study of these targets have been characterized by EDS and FESEM techniques. • The measured energy values of elastically scattered 16O have been compared with theoretical calculation LISE++. [ABSTRACT FROM AUTHOR]

The high spin states in 195Bi were studied by &ggr;-ray spectroscopic method using the 181Ta(20Ne, 6n) fusion-evaporation reaction at 130 MeV. The &ggr; &ggr; coincidence data were taken using an array of eight clover high-purity germanium detectors. The spin and parity assignments of the excited states were made from the measured directional correlation from oriented states ratios and integrated polarization asymmetry ratios. The results show, for the first time, the evidence of a rotational-like band based on a 13/2+ bandhead in this nucleus, indicating the onset of deformation at the neutron number N = 112 for the bismuth isotopes. The results obtained were found to be consistent with the prediction of the total Routhian surface calculations using the Woods-Saxon potential. The same calculations also predicted a change in shape from oblate to triaxial in 195Bi at high rotational frequency. [ABSTRACT FROM AUTHOR]