1Medium20 marks
(i) Write semi-empirical mass formula. Calculate the atomic number (Z) of most stable nucleus for given mass number (A) using the above formula. (Use the value of fitted coefficients for Coulomb energy a_3 = 0.711 MeV and that for asymmetry energy a_4 = 23.702 MeV).
(ii) Calculate the Q-value of the following nuclear reaction: _4Be^9 + _2He^4 = _6C^{12} + _0n^1 Given: the mass of neutral atoms of Be, He and C are 9.015060, 4.003874 and 12.003815 amu, respectively. The mass of neutron is 1.008986 amu.