Radioactivity: Activity, gamma radiation and time required
Please answer the following questions (attached) with full explanations thankyou.
A radioactive isotope has a decay constant lambda = 0.0582 s-1. a) What is the half-life of the isotope in seconds? b) What fraction of the activity of a sample of the isotope will remain after 30 seconds? c) Identify the name of the isotope.
A patient undergoing radiation therapy for cancer receives a 215-rad dose of radiation. (a) Assuming that the cancerous growth has a mass of 0.17kg, calculate how much energy it absorbs. (b) Assuming the growth to have the specific heat of water, determine its increase in temperature. Answer A. 0.37 J B 0.51 mK A d ...continues
A radioactive source in the form of a metallic sphere of radius 10^-2 m emits beta particles at the rate of 10^10 particles per second. The source is electrically insulated. What is the time required for its potential to be raised by 4 V assuming 50% of the emitted beta particles escape the source ?
(See attached file for full problem description)
1.) In a Rutherford scattering experiment, an α-particle (charge = +2e) heads directly toward a gold nucleus (charge = +79 e). The -particle had a kinetic energy of 4.9 MeV when very far (r -> ∞ ) from the nucleus. Assuming the gold nucleus to be fixed in space, determine the distance of closest approach. (Hint: Use c ...continues
number of collisions in a nuclear reactor
The question is attached in the file.
Nuclear Energy and Elementary Particles
1.) It has been estimated that the Earth contains 1.0 x 10^9 tons of natural uranium that can be mined economically. If all the world's energy needs (7.0 x 10^12 J/s) were supplied by 235(U) fission, how long would this supply last? Assume that the average energy released in a fission event is 208 MeV. (Hint: 235/92(U) has a per ...continues
Kinetic energy of electron and ground state of the hydrogen atom
An electron has a de Broglie wavelenght equal to the diameter of the Hydrogen atom. What is the kinetic energy of the electron? How does this energy compare to the ground state of the hydrogen atom?
When we developed Gamow's theory of alpha emission, we assumed the alpha particle was preformed in the nucleus. there is some evidence that nucleon clusters continually form and breakup in the nucleus and that alpha emission requires the formation of an alpha cluster at the nuclear surface prior to emission. Using classical (i.e ...continues
