By Eduardo G. Yukihara
Optically prompted luminescence has built into one of many top optical concepts for the size and detection of ionizing radiation. this article covers, in a readable demeanour, complex sleek purposes of the method, the way it can play an invaluable function in several components of dosimetry and the way to method the demanding situations awarded whilst operating with optically inspired luminescence.
The six chapters are as follows:
- Introduction, together with a brief background of OSL and information of profitable purposes
- Theory and useful facets
- Personal Dosimetry
- Space Dosimetry
- Medical Dosimetry
- Other purposes and ideas, together with retrospective and twist of fate dosimetry, environmental tracking and UV dosimetry
during the ebook, the underlying thought is mentioned on an as-needed foundation for a whole knowing of the phenomena, yet with an emphasis of the sensible purposes of the strategy. The authors additionally supply heritage details and appropriate key references on every one procedure, inviting the reader to discover deeper into the topic independently.
Postgraduates, researchers, and people concerned with radiation dosimetry will locate this ebook rather invaluable. the fabric is either appropriate and obtainable for either experts and people new to the sphere, for this reason is prime to any educational attracted to sleek advances of the subject.
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Example text
During irradiation) or increased linearly as during a TL readout. , 1997). 21) Theory and Practical Aspects 35 and dn v /dt ∼ = 0. , trapped holes) is zero before irradiation (m = 0). This means that during irradiation the RL signal given by m(t)Am n c (t) is initially zero, increasing with dose as the concentration of trapped holes m increases. 2). This behavior indicates a pre-existing concentration of recombination centers (m = 0) allowing for immediate recombination from the moment the radiation source is turned on, which is not surprising in real crystals containing many types of defects, or direct transfer of energy from excitons to the luminescence centers.
These defects can also be characterized by other techniques such as photoluminescence and radioluminescence and, therefore, more information is usually available about the recombination and luminescence centers than the trapping centers involved in the OSL process. 8 Rate Equations for OSL and TL Processes A general statistical description for thermally stimulated processes and an arbitrary distribution of defect levels is given by Br¨aunlich (1979) and Chen and McKeever (1997), but the resultant equations are mathematically intractable.
G. , 1998b). , the width, number and position of emission bands) are determined by the type of defect, its site in the crystal, interaction with the vibrating environment of the crystal and the resultant separation of the energy levels. , ion “free in space”) differently according to the symmetry of the site and the strength of the crystal field An excellent introduction to this topic can be found in Blasse and Grabmeir (1994), whereas more in-depth discussions can be found, for example, in Henderson and Imbush (1989) and in Di Bartolo (1968).