N is
symbols of number of atoms present
which kind of semiconductor material is not used in construction of detectors
diamond
which kind of semiconductor material is used in construction of detectors
pure silicon, germanium
whats bremsstrahlung
when a high energy electron is stopped in the coloumb field of nuclei effeciency is Z^2
effective half life is
shorter than either the biological and physicsl half life
commonly used filling gasses in GM detectors are
argon and helium
low values of LET mean that ionisations produced are
far away from eachother
which part of scintillation counter converts light photons into low energy electrons
photocathode
what radiation has highest LET
alpha
which radiation has smallest ionisation power
gamma
ionization process takes place through what all phenomena
photoelectric effect , pair productoon , compton scattering
The main physical effects of laser radiation on tissue is an increase in
heat (temp)
The feature of laser light which is mainly responsible for the increase in the perimeter is
intensity
The type of interaction with matter depends on
atomic number
energy of photons
while passing through the absorbent the photon of, radiation lose energy on the way of the following phenomena 
Compton effect
photoelectric effect
pair production
in the diagnosis of MRI ……… radiation in the range of ………. is used while the diagnosis of computer tomography……. radiation in the range of ……….
non ionising
100 mhz to 800 mhz
ionising
0.01 - 10
which of these tests cannot be repeated on the same patient
ct bc ionizing mri cause non
