Abstract:
Light emission from zinc aluminate nanocrystals have got a great attention in industries
for controlling the quality of some glasses, ceramics, semiconductor products,
biology and biochemistry for studding the properties( involving different chemical
reaction) or contents of proteins,leaves, e.t.c. Thermoluminescence is one of the luminescence,
which is the emission of light from an insulator or semiconductor when it
is being heated, following the previous absorption of energy from radition. Therefore
in this study the mathematical expression for the thermoluminescence intensity of
zinc aluminate as a function of temperature has been derived specifically. The thermoluminescence
(TL) Properties of Zinc aluminate nanocrystal were investigated in
the View of first Order Kinetics. The continuous promotion in numerical methods
has greatly helped to solve the complex thermoluminescence kinetic equations (rate
equations) which can not be solved analytically. The complexity of the rate equations
increase with the number of traps considered. As activation energy increases the glow
curve shifts to higher temperatures with a decrease in the height. As frequency factor
(s) increases the peak shifts to lower temperatures with an increase of the height and
a decrease in width. A trapping center with a high frequency factor needs less energy
or it needs lower temperature to free a charge carrier. linear heating rate ( ) can be
increase the intensity of thermoluminescence also increase and for trapping electron
more energy produce on the less linear heating rate and less energy were produced
on the high linear heating rate
