Biennial Report 2005-2007 - Saha Institute of Nuclear Physics

236 Biennial Report 2005-076.1.11.4 Activation products from Lead-bismuth eutectic (LBE) targetLead-bismuth eutectic (LBE) target (LBE) target is considered to be an efficient spallation targetto be used for accelerator driven transmutation, production of U-233 from thorium, material sciencestudies and largely in accelerator driven sub-critical system (ADS) for power production. Excitationfunctions of different activation products for proton induced reaction on LBE and D9 and T91 steelalloyupto 200 MeV are estimated using the nuclear reaction model codes ALICE91 and EMPIRE2.18 and compared with the experimental data wherever available. It is seen that in the case ofLBE target the measured excitation functions for 207,206 Po and 207,206,205 Bi are well reproducedwhile those for 209 Po are overpredicted at higher energies by both the reaction models which maybe caused due to uncertainty in the fission barrier. Yield of all the activation products from thesereactions are also calculated and the resulting activity estimated. Of the many activation products,500µA proton beam produces highest activity of 207 Po (5x10 6 MBq for 400 hours of irradiation)while the primary neutrons produce highest activity of 210 Bi. For T91 and D9 alloys, highestactivity is generated for 55 Co which has a 931.2 keV gamma ray photon The reaction models usedreproduce satisfactorily the measured data for residual nuclei close to the primary composite whileproducts far-off in the reaction chain are not very well predicted but may be accepted to have anidea. The work finds its application for ADS target design studies and planning of the facility.PK Sarkar†, Maitreyee NandyCSD6.2 Publications6.2.1 Volumes EditedTapas K Kundu, Dipak Dasgupta, Chromatin and Disease (Volume 41 of the series SubcellularBiochemistry) (Springer, New York, USA, 2007)Pradeep K Sengupta, Anwesha Banerjee, Bidisa Sengupta, Photo/Electrochemistry & Photobiologyin the Environment, Energy and Fuel (Research Signpost, Kerala, India, 2006)6.2.2 Publications in Edited VolumesUdayaditya Sen, Sampa Biswas, Chandana Chakrabarti, JK Dattagupta, Structure-function of afew plant proteins using X-ray, in Frontiers in Biophysics: Vol. 6, Indian J of Physics - SpecialIssue, Ed(s) TP Singh & CK Dasgupta (Allied Publishers, India, 2005) p50Parijat Majumder, Suman Kalyan Pradhan, Pukhrambam Grihanjali Devi, Sudipta Pal, DipakDasgupta, Chromatin as a Target for the DNA-Binding Anticancer Drugs, in Chromatin and Disease(Subcellular Biochemistry, Vol-41), Ed(s) Tapas K Kundu and Dipak Dasgupta (Springer,New York, 2007) p145Susanta Lahiri, An ultrasensitive technique for environmental analysis, in Environment Scienceand Thoughts, vol II, Ed(s) Arabinda Das (acb publications, Kolkata, 2005) p186