A S Divatia
Articles written in Pramana – Journal of Physics
Volume 24 Issue 1-2 January 1985 pp 227-244 Nuclear Physics
Accelerator development in India is reviewed with special emphasis on indigenous effort. It started with the 4 MeV cyclotron at the Saha Institute of Nuclear Physics, grew substantially with the installation of the Van de Graaff accelerators at Trombay and really came of age with the 224 cm Variable Energy Cyclotron at Calcutta, which resulted in considerable fall-out of technology. Simultaneously electron linac development has also taken place. Thus the stage is set for developing new types of accelerators such as the electron storage ring synchroton, and a proton/heavy ion synchrotron.
Volume 24 Issue 3 March 1985 pp 544-544 Erratum
Volume 26 Issue 3 March 1986 pp 191-203 Experimental Techniques And Instrumentation
A new approach for lithium drifting in silicon is described where the silicon devices under drift are held at constant temperature and bias at normal air ambient, and the drift process is terminated at the end of an estimated time depending upon the thickness of wafers. A 4-channel lithium drifting unit with electronically controlled oven has been constructed for this purpose. Full details of the fabrication procedure are given. A sizable number of Si(Li) detectors have been fabricated using this approach. The quality of the detectors is tested with241Am alphas and conversion electrons from209Bi and137Cs sources. The detectors are regularly used for nuclear physics experiments at this Centre.
Volume 30 Issue 3 March 1988 pp 193-210 Nuclear Physics
Excitation functions for the reaction181Ta (
Volume 32 Issue 4 April 1989 pp 591-598 Miscellaneous
Trace elements in various materials using nuclear techniques are studied. Results obtained by using energy-dispersive X-ray fluorescence (EDXRF) and proton-induced X-ray emission (PIXE) are examined. The EDXRF method is used to quantitatively evaluate trace elements such as Mn, Fe, Cu, Zn, Br, Rb and Sr in tea leaves. Correlation of trace elements in tea leaves and in the corresponding soil is studied.
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