Thermo-Luminescence Dosimetry questions with
verified answers
How is the light intensity measured? Ans✓✓✓ This light intensity is
measured by photo-multiplier tube
How is Thermoluminescent used for dosimetry and measuring dose?
Ans✓✓✓ Basic principles is the ability of certain imperfect crystals to
absorbed and store the energy of ionising radiations that, upon heating,
is re-emitted in the form of light.
The light is detected, and the light output is correlated with the
absorbed dose.
What happens when it is heated? Ans✓✓✓ Electrons caught in the
traps are unable to leave until they are provided with sufficient energy
What happens when they are released? Ans✓✓✓ When released from
traps electrons return to the conduction band and then they drop to
the valence band
What is done to TLD's due to the fact its difficult to control the amount
of dopant put into each TLD? Ans✓✓✓ it is necessary that the users
calibrate each & every batch of TLDs
So that the response per Grey of dose to be predictable over a known
range of energy and type of radiation
verified answers
How is the light intensity measured? Ans✓✓✓ This light intensity is
measured by photo-multiplier tube
How is Thermoluminescent used for dosimetry and measuring dose?
Ans✓✓✓ Basic principles is the ability of certain imperfect crystals to
absorbed and store the energy of ionising radiations that, upon heating,
is re-emitted in the form of light.
The light is detected, and the light output is correlated with the
absorbed dose.
What happens when it is heated? Ans✓✓✓ Electrons caught in the
traps are unable to leave until they are provided with sufficient energy
What happens when they are released? Ans✓✓✓ When released from
traps electrons return to the conduction band and then they drop to
the valence band
What is done to TLD's due to the fact its difficult to control the amount
of dopant put into each TLD? Ans✓✓✓ it is necessary that the users
calibrate each & every batch of TLDs
So that the response per Grey of dose to be predictable over a known
range of energy and type of radiation
