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The alpha induced fission of ""Bi has been carried out at alpha energy of 49.1 MeV and 44.9 MeV using gamma ray spectrometry.

The alpha particle induced reactions on 2 7 Al have been studied using gamma ray spectrometry. The cross sections for the formation of 7 Be, 22 Na, 24 Na, 27 Mg, 28 Mg, 28 A1 and 29 A1 in the alpha particle induced reaction on 27 A1 with alpha particles of energy 55.2 MeV and 58.2 MeV have been determined. The results are discussed in terms of increasing projectile energy and multi nucleon as well as cluster emission from the excited nucleus. o(-BEAM 25 4jjm Al 0-76jum Al Bi TARGET ON 25-4,um AlFig. 1. Target assembly used for irradiation of 209 Bi with alpha particles of energy 60 MeV.

The alpha particle induced reaction studies of 209 Bi have been carried out at alpha particle energies of 55.7 MeV and 58.6 MeV using gamma ray spectrometry. The cross sections for the production of reaction products 207 At, 208 At, 209 At and 210 At have been determined. The variation of experimental production cross section for the reaction products in 209 Bi(a,xn) 213 " Jt At as a function of neutron number of the reaction products at different available energies showed the presence of possible shell effects at neutron number 126.

The alpha particle induced fission of 209 Bi has been investigated for E" = 55.7 and 58.6 MeV using gamma ray spectrometry. The cross sections for the production of fission products have been determined. The mass distributions have been found to be broad with a peak near mass 104. The charge distribution has been studied at the same particle energies. The fractional cumulative yields of 97 Zr, "Mo, 101 Mo, 112 Pd and 117m Cd have been determined using gamma ray spectrometry. The width of charge distribution is broad.

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