23 Ne decays to 2³ Na by negative beta emission. What is the maximum kinetic energy of the emitted electrons?
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- As per the mass-energy equivalence principle, energy and mass are interconvertible. Thus when energy is lost in chemical, nuclear, or any other energy transformation the system will also lose mass.
- Q value for a reaction is the amount of energy absorbed or released during the nuclear reaction and will be equal to the energy equivalent to the lost mass.
- Q value of a reaction is given by,
Here mR is the mass of the reactant, mP is the mass of the product, and c is the speed of flight.
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- The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy 6.1 MeV. What is the initial power emitted by a sample of 242 Cm with a starting number of No = 10¹8 atoms? Select one: a. 49 mW. O b. 15.6 W. O c. O d. 308 kW. 2.7 W.What minimum energy E(min) is needed to remove a neutron from K40 and so convert it to K39? The atomic masses of the two isotopes are 39.964000 and 38.963708 u, respectively. E(min) = ? eVWhat is the nuclear equation for 2Pu (alpha decay) wwwwwww 244PU 242 90 1) 244 Pu → 24QU + ¿He 92 248 c. 2Pu -> 94 244Pu → 246TH + ZHe 94 90
- The isotope of Curium 242Cm has a half-life of 160 days and emits alpha particles with an energy 6.1MeV. What is the initial power emitted by a sample of 242Cm with a starting number of N0 = 1018 atoms? Select one: a. 2.7 W. b. 49 mW. c. 308 kW. d. 15.6 W.a.) Calculate the wavelength and energy of the photon emitted in the decay ni=4 to nf=3 for the Li+2 ion. Show calculation. b.) Provide a written explanation for why the value calculated above is different from the value for the same ni and nf values for hydrogen. c.) What is the frequency of energy needed to excite a hydrogen electron from n=1 to n=4? Show calculation.A nucleus of 238 Np captures a thermal neutron to form a nucleus of 23⁹Np. What is the excitation energy (to 1 dp) in MeV for this process?
- When a nucleus decays, the daughter nucleus can be in an excited state. The 93/43Tc nucleus (molar mass 92.910 2 g/mol) in the ground state decays by electron capture and e+ emission to energy levels of the daughter (molar mass 92.906 8 g/mol in the ground state) at 2.44 MeV, 2.03 MeV, 1.48 MeV, and 1.35 MeV. (a) Identify the daughter nuclide. (b) To which of the listed levels of the daughter are electron capture and e+ decay of 93/43Tc allowed?A 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?