1996 5. An unstable nucleus that is initially at rest decays into a nucleus off

Question

1996 5. An unstable nucleus that is initially at rest decays into a nucleus off a. helium-4 and fermium-252 alpha particle that has a kinetic of8.42 Mev. The atomic masses of are 4.00260 containing 100 What is the atomic un and u, respectively number of the original unstable nucleus? b. What is the speed of the alpha particle? (Neglect relativistic effects for this calculation.) c, Determine the speed of the fermium nucleus as it recoils. d. Where does the kinetic energy of the alpha particle come from? Explain briefly. e. Find the mass of the original unstable nucleus. (25 OCH or 4 f. Suppose that the fermium-252 nucleus could undergo a decay which a particle was pr How would this affect the atomic in number of the nucleus? Explain briefly. NOT RS He X io2 No A O2. (1.35-10 2.01.10 m ls 2. 1.35. ID 12. 2mp 2m m He He He (2.01. ID mls 3.9 mls m Fm m Fm 22 10 100m t 152 m IOOLI. 4.22.10 25 ka The mass or alpha is converted nto This comes from the pinding energy In the decay when -ne energy is radiated, energy converted to kinetic energy. 29 37 10 (4:22.10 Am t mat mem No 1.52 ID

Explanation / Answer

Atomic no wil be 253 if it is beta - emission we balance atomic no on th both the sides of the equation atomic no of parent nuclie must be equal to atomic no of daughter nuclie that is Fe252------ X253 +beta -1

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