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Презентация на тему Electron paramagnetic resonance (epr) dosimetry

ELECTRON PARAMAGNETIC RESONANCE (EPR) DOSIMETRYElectron paramagnetic resonance (EPR) dosimetry is a physical method for the assessment of absorbed dose from ionising radiation. It is based on the measurement of stable radiation induced radicals in human calcified
ELECTRON PARAMAGNETIC RESONANCE (EPR) DOSIMETRYPrepared byThe 4th years studentOf thr FEM, gr. 21051Savin Andrey ELECTRON PARAMAGNETIC RESONANCE (EPR) DOSIMETRYElectron paramagnetic resonance (EPR) dosimetry is a physical RESONANCE CONDITIONhν = gµBBν is resonance frequencyh is Plank’s constantg is the EPR SPECTROMETEREPR spectrometer «Bruker» CLASSES OF EPR SPECTROMETERSLarge research spectrometersMiddle-class spectrometers Small spectrometers ADVANTAGES AND DISADVANTAGES OF THE EPR METHOD + measure the volume of THANKS FOR ATTANTION!!!
Слайды презентации

Слайд 2 ELECTRON PARAMAGNETIC RESONANCE (EPR) DOSIMETRY

Electron paramagnetic resonance (EPR)

ELECTRON PARAMAGNETIC RESONANCE (EPR) DOSIMETRYElectron paramagnetic resonance (EPR) dosimetry is a

dosimetry is a physical method for the assessment of

absorbed dose from ionising radiation. It is based on the measurement of stable radiation induced radicals in human calcified tissues (primarily in tooth enamel).

Слайд 3 RESONANCE CONDITION
hν = gµBB
ν is resonance frequency
h is

RESONANCE CONDITIONhν = gµBBν is resonance frequencyh is Plank’s constantg is

Plank’s constant
g is the g-factor
µB is the Bohr magneton
B

is the magnetic field induction




Слайд 4 EPR SPECTROMETER
EPR spectrometer «Bruker»

EPR SPECTROMETEREPR spectrometer «Bruker»

Слайд 5 CLASSES OF EPR SPECTROMETERS
Large research spectrometers
Middle-class spectrometers
Small

CLASSES OF EPR SPECTROMETERSLarge research spectrometersMiddle-class spectrometers Small spectrometers

spectrometers


Слайд 6 ADVANTAGES AND DISADVANTAGES OF THE EPR METHOD
+

ADVANTAGES AND DISADVANTAGES OF THE EPR METHOD + measure the volume

measure the volume of
samples;

dose reconstruction to the distinctive tissues;
dose reconstruction after long periods of exposure;
dose reconstruction for many years after the exposure.

-
the difficulty in collecting material for analysis;
reconstruction of the individual dose is complicated and labour-consuming.


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