In an experiment on photoelectric emission of `gamma`-rays on platinum, the energy distribution of photoelectron exhibits peaks at a number of descrete energies : 270keV, 339keV and 354keV. The binding energy of K,L and M shell in platinum are known to be 77keV, 13keV and 3.5keV approx., what is the wavelength of `gamma`-rays with which the data are consistent.

The energy of K-electron in tungsten is -20.0 keV and of an L-electron is -2.0 ke V. Find the wavelength of X-rays emitted when an electron jumps from L - shell to K-shell.

When 24.8keV X- rays strike a material, the photoelectrons emitted from K shell are observed to move in a circle of radius 23 mm in a magnetic field of 2xx10^(-2)T . The binding energy of K shell electrons is

To produce characteristic X - rays using a Tungsten target in an x - ray generator , the accelerating should be greater then ……. Volts and the energy of the characteristion is …… eV . (The binding energy of the intermost electron in Tungsten is - 40keV).

The Ka X-ray of molybdenum has wavelength 71 pm. If the energy of a molybdenum atom with a K electron knocked out is 23:32 keV, what will be the energy of this atom when an L electron is knocked out?

Electrons with energy 80 keV are incdent on the tungsten target of an X - rays tube , k- shell electrons of tangsten have 72.5 keV energy X- rays emitted by the tube constain only

X-ray are emitted by a tube containing the electron gt Noibum (Z = 41) as anticathode and the K_(alpha) X-ray an allowed to be incident on an unknown gas containing hydrogen- like atom ions. It is found that the X-ray cause the emission of photoelectrons with an energy of 2.7 keV from these ions. Find a. the minimum voltage at which the X-ray tube should be opreated so that the momentum of the emitted photoelectrons is doubled. b. the approximate value of Z for the target of the anticathode after the momentum has been doubled. c. the approximate value of Z the atomic number of the atom of the gas. d. the number of the ion produced in the gas caused by X-ray , if the inetensity of X-ray is 100 mWm^(-2) and 1% of the X-rays cause ionization.