Atomic and Nuclear Physics Answers

Draw a curve of binding energy per nucleon as a function of mass number. With the help
of this curve, explain the process of fission and fusion.

Write down the wave functions (i) ψ210 and (ii) ψ300 for the hydrogen atom. Obtain the
expectation value of r for the ground state hydrogen atom.

The half-life of radon is 3.82 days. How long will it take for 60 percent of a
sample of radon to decay?

Neutral hydrogen atoms are moving along the axis of a vacuum tube with a speed of
2.0 × 106 ms−1. A spectrometer receives light emitted by these atoms in the direction
of their forward motion. If emitted from hydrogen atoms at rest, this light would
have a measured wavelength of 486.13 nm. Calculate the expected wavelength for
light emitted from the approaching atoms, using the relativistic formula.

An X-ray tube emits X-rays with a wavelength of 1.0 x 10-11 m. Calculate the energy, in electron volts, that the X-rays possess.

_____ eV

Calculate the energy,in electron volts,of x-rays that have a frequency of 1.0×1019Hz

Give expressions which define the quantities kerma, exposure and dose in terms of energy fluence and appropriate interaction coefficients. Define each of the terms.

The age of the dead sea scrolls was measured using radiocarbon dating. If the measurement gives a ratio of 0.78 for the ratio of the activity in the sample to the activity in a sample of corresponding live material of similar mass, calculate the age of the scrolls.

Complete the nuclear equations below. Which of them is an incorrect nuclear equation?
121SB->121Sn+-1B

238U->234Th+4/2a

10Be->10B+0/-1B

190Pt->186Os+4/2a

The half-life of a certain radioactive isotope is 32 hours. What fraction of the sample would remain after 16 huors?

0.50
0.25
0.62
0.71