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Sadhana Mukerji,Pritam Das Krishnani,Byrapura Siddaramaiah Shivashankar,Vikas Kaluram Mulik,Saraswatula Venkat Suryanarayana,Haladhara Naik,Ashok Goswami 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.1
The yields of various fission products in the neutron-induced fission of 238U with the flux-weightedaveragedneutron energies of 9.35 MeV and 12.52 MeV were determined by using an off-line gammarayspectroscopic technique. The neutrons were generated using the 7Li(p, n) reaction at BhabhaAtomic Research Centre-Tata Institute of Fundamental Research Pelletron facility, Mumbai. Thegamma- ray activities of the fission products were counted in a highly-shielded HPGe detector overa period of several weeks to identify the decaying fission products. At both the neutron energies, thefission-yield values are reported for twelve fission product. The results obtained from the presentwork have been compared with the similar data for mono-energetic neutrons of comparable energyfrom the literature and are found to be in good agreement. The peak-to-valley (P/V) ratios werecalculated from the fission-yield data and were found to decreases for neutron energy from 9.35 to12.52 MeV, which indicates the role of excitation energy. The effect of the nuclear structure on thefission product-yield is discussed.