A sample of Co (atomic mass= 59.933820u) undergoes ß decay emitting electrons with maximum kinetic energy 0.31 MeV. If the ground state mass of the Ni atom is 59.930788u, then calculate the excitation energy of the state to which the decay occurs.
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- The isotope of Nickel, 66Ni decays by β emission, has a half-life of 2.3 days. and the β particles have an average energy of 65 keV. A source consisting of this isotope has an initial number of atoms N0 = 5 x 1020 atoms. What is the power per unit area initially deposited by this source in a small target placed at 1m distance from the source? Select one: a. 35 W/m2 b. 1.45 W/m2 c. 4.5 kW/m2 d. 7.6 MW/m239.8 An atom of uranium-235 (atomic mass: m(23U) cays to thorium-231 (atomic mass: 231. 00 Th) = 231.03630 u) emission of an 235.04392 u) de- 92 via the a particle (nuclear 4.00151 u). m(ža) c = 2.998 x 108 m s-1. mass: Use %D (a) What is the binding energy of an 235U nucleus (in J)? 92 (b) What is the binding energy of a 231 Th nucleus (in J)? 90 (c) What is the binding energy of an a particle (in J)? (d) What is the maximum possible ki- netic energy (in J) of the a particle emitted during this decay? (Hint: what is the difference between the mass of 23°U and the total mass of 92 231 Th and an a particle?) 90 (e) Whatis the maximum velocity of the emitted a particle?Calculate the energy released in the reaction, in MeV: 6Li + n = 4He + 3H mLi = 6.015123 u; mn = 1.008665 u; mHe = 4.002603 u; mH = 3.016049 u %3D %3D
- Find the binding energy per nucleon in J and eV for the three following isotopes, given their atomic masses in u: 33 Si silicon 32.97800017 u ☐ × 10-12 J ☐ MeV 241 Es einsteinium 241.0685424 u 99 ×10−12 J☐MeV 170 oxygen 16.9991317012 u ×10-¹² J MeV mhydrogen = 1.007825 u mneutron 1.008664915 u -27 u = 1.6605 × 101 kgAn atom of 239Pu decays into 235U and an alpha particle. How much energy (in MeV) is released due to the decay?Q.7 (b) The a-particle of energy 14 MeV incident on a Ni60 nucleus and form the compound nucleus Zn64 via the following reactions: He + Ni60 → Zn64 Calculate the excitation energy of Z64 relative to the ground state Zn64. (Given: M (Ni) = 59.930878u, M(Zn64) = 63.92914u and M(He) = 4.00260 amu.
- The ground state of 17Ne is unstable. Its half-life has been measured to be 109 ms. (a) What is the energy width of the state? (b) List two possible decay mechanisms.A 2.0-MeV neutron is emitted in a fission reactor. If it loses one-half its kinetic energy in each collision with a moderator atom, how many collisions must it undergo to reach an energy associated with a gas at a room temperature of 20.0°CA proton of energy 25 MeV is moving in Pb. How much energy does it lose in a collision with an alpha particle? How many collisions are required to completely stop it?