207 , Which of the following rays has the highest ponetrating power? (a) ax-rays; (b) B-rays (c) y-rays; (d) X-rays. (c) The theory of alpha decay does not connect (a) the Kinetic energy of u-particles. (b) the nuclear charge: (c) the O- value of equation: (d) the disintegration constant. (c) 4 Alpha decay is the nuclear process occurring under the (a) strong interaction, (b) electromagnetic interaction, (c) weak interaction. (d) none of these. ( a) Which of the following is incorrect? (a) The emission of the main group of a-particles with a definite energy corresponds to the energy transitions between the grounds of the parent and daughter nuclei; (b) the fine structure of c-spectra is due to the transitions to excited states of the daughter nucleus, (c) the long-range particles are due to the transitions from the excited state of the parent nucleus; (d) none of these. (d) 7. The energy of the a-particles of various isotopes (a) decreases with increasing mass number; (b) increases with increasing mass number; (c) does not depend on mass number; (d) none of these is correct. (a) $. The existence of the centrifugal barrier is associated (a) with the nature of motion of the particle; (b) with the charge: (c) with the particle of zero angular momentum; (d) with all of these. (a) o. the effect of the centrifugal barrier (a) does not exceed 5 MeV even for / = 10, (b) is stronger than the coulomb potential: (c) decreases much slower than the Coulomb potential with increasing distance; (d) is very small in the interaction of neutral particles with nuclei. (a) 10. The probability of alpha decay is lower than the theoretical value because (a) the probability of the formation of an a-particle is not considered, (b) the alpha particles carry angular momenta / > 10; (c) the contrifugal potential (a) has no contribution; (d) the a-particles are heavy particles