Atomic and Nuclear Physics Answers

write selection rules for semi-leptonic and non-leptonic week decays.discuss by using examples and Feynman diagram?

what will be the rate of spontaneous emission to the stimulated emission in sun?is laser action possible in sun?

What is magnetic moment of Muon, why it is abnormal?

write selection rules for semi-leptonic and non-leptonic weak decays.discuss in detail by using examples and Feynman diagram

In the mercury spectrum one can find a strong emission line with the wavelength
576,960 nm. This corresponds to the energy difference between two energy levels in the mercury atom. Determine this energy difference expressed in electron volts.

A photon falls against a hydrogen atom that is in the first excited state. The photon is absorbed, the hydrogen atom is ionized and the emitted electron receives an energy of 5.6 eV.
a) What energy must the incident photon have?
b) What energy would the emitted electron have received if the atom had instead been in its basic state?

Put the following energy types in the proper order that they would occur during a nuclear fission reaction in a nuclear reactor.
1. Mechanical Energy
2. Electrical Energy
3. Nuclear Potential Energy
4. Kinetic Energy
5. Thermal Energy

Put the following energy types in the proper order that they would occur during a nuclear fission reaction in a nuclear reactor.
2. Electrical Energy
3. Nuclear Potential Energy
4. Kinetic Energy
5. Thermal Energy

Sodium-24 has a half-life of 15 hours. If a sample of sodium-24 has an original activity of 500 Bq, what will its activity be after 60 hours?

A typical atom has a diameter of about 4.56 x10 -10 m
a) What is the diameter in Inches and µm?
b) Approximately how many atoms are there along a 1.0 cm line?