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Physicists in the US have demonstrated a novel technique to detect radioactive materials remotely using carbon dioxide (CO₂) lasers.
The first CO₂ laser was developed by Indian-American scientist Prof. C.K.N. Patel.
It is a four-level molecular gas laser that operates using vibrational energy states of CO₂ molecules.
Highly efficient, producing high-power continuous or pulsed output.
Principle of CO₂ Laser:
iThe laser transition occurs between vibrational energy states of CO₂ molecules. Energy is transferred from excited nitrogen (N₂) molecules to CO₂, achieving the population inversion necessary for laser action.
Characteristics of CO₂ Laser
iType: Molecular gas, four-level laser.
iiActive medium: Gas mixture of CO₂, N₂, and He.
iiiPumping Method: Electrical discharge.
ivOptical Resonator: Concave mirrors.
vPower Output: Up to 10 kW.
viNature of Output: Continuous wave (CW) or pulsed wave.Wavelength: 9.6 μm & 10.6 μm (Infrared region).
How Does the Detection Work?
iRadioactive decay & ionization
iiAvalanche effect
iiiLaser characteristics
ivDetection mechanism
vFluorescence imaging
viMathematical model
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