BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Asia/Thimphu BEGIN:DAYLIGHT DTSTART:20380119T091407 TZOFFSETFROM:+0600 TZOFFSETTO:+0600 RRULE:FREQ=YEARLY;BYDAY=3TU;BYMONTH=1 TZNAME:+06 END:DAYLIGHT BEGIN:STANDARD DTSTART:19871001T003000 TZOFFSETFROM:+0530 TZOFFSETTO:+0600 RRULE:FREQ=YEARLY;BYDAY=1TH;BYMONTH=10 TZNAME:+06 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20110901T161259Z UID:EE80B8EC-E5B6-11E7-833E-0050568D7F66 DTSTART;TZID=Asia/Thimphu:20110826T130000 DTEND;TZID=Asia/Thimphu:20110826T150500 DESCRIPTION:The purpose of this work is to investigate the influence of the rmal quenching in quartz luminescence for the application of quartz in dat ing of archaeological and geological samples. Additionally\, it supports t o bring precise results when quartz is used for accidental and retrospecti ve dosimetric applications. The information delivered in the present work corresponds to the theoretical study of thermal quenching as well as exper imental study on the natural and artificial quartz samples via heating rat es within the range 0.25 to 20K/s. The experimental is concentrated on det ermination of prevalent pair of thermal quenching parameters. It was follo wed to by the attempt of reconstruction of thermally quenched glow curve. The theoretical work is based on numerical simulation of influence of ther mal quenching in various TL parameters which can be evaluated from experim ental glow curve of quartz\; peak height\, peak integral and methods of ev aluation of TL trapping parameters. It also provides valuable information for a) evaluation of thermally quenching parameters (W\, C) b) shift of pe ak maximum temperature (due to thermal quenching)\, c) the influence on th e symmetry factor d) the kinetics order of the glow-peak and e) influence of thermal quenching on the activation energy via different methods of eva luating trapping parameters. The investigation of thermal quenching parame ters\, C and W\, of quartz and their single pair of prevalence values of W and C were determined\; Searching of prevalent values of the thermal quen ching parameters i.e. the activation energy W and the dimensionless parame ter C from the quartz samples of various origins. The observations of infl uence of thermal quenching parameters were analyzed from quartz samples an nealed at different temperature. One new set of thermal quenching paramete rs were observed which we named as intermediate group of thermal quenching parameters. However\, the prevalence pair of thermal quenching parameters of quartz was observed within the narrow range of values of W and C but i t was not able to depict particular prevalent pair of thermal quenching pa rameters for the peaks of high temperature region. Finally the prevalent p air of thermal quenching parameters were selected which satisfy the entire glow peaks of glow curves. These details will be the crucial in the appli ed fields of TL and OSL such as dating\, authenticity testing\, archaeolog ical and geological study. The reconstruction attempt of thermoluminescenc e glow curve of quartz samples was performed. The consistency of the recon structed thermoluminescence glow peaks was observed by retransforming to q uenched glow peaks. It was followed by separate analysis to observe consis tency in their shape of glow peaks (in peak height\, glow peak area and sy mmetry factor of glow peak) and trapping parameters with that of experimen tal quenched glow peaks. This study exhibit the reconstruction attempt was successful to provide alternative way to evaluate trapping parameters of thermoluminescence glow curve.\n\nCo-sponsored by: Nepal Physical society\ n\n LOCATION: ORGANIZER:bhadrapokharel@ioe.edu.np SEQUENCE:0 SUMMARY:[Legacy Report] “Dosimetric Characterization of materials wit h application on archaeometry and retrospective dosimetry”. URL;VALUE=URI:https://events.vtools.ieee.org/m/63708 X-ALT-DESC:Description: <br />The purpose of this work is to investigate th e influence of thermal quenching in quartz luminescence for the applicatio n of quartz in dating of archaeological and geological samples. Additional ly\, it supports to bring precise results when quartz is used for accident al and retrospective dosimetric applications. The information delivered i n the present work corresponds to the theoretical study of thermal quenchi ng as well as experimental study on the natural and artificial quartz samp les via heating rates within the range 0.25 to 20K/s. The experimental is concentrated on determination of prevalent pair of thermal quenching param eters. It was followed to by the attempt of reconstruction of thermally qu enched glow curve. \nThe theoretical work is based on numerical simulation of influence of thermal quenching in various TL parameters which can be e valuated from experimental glow curve of quartz\; peak height\, peak integ ral and methods of evaluation of TL trapping parameters. It also provides valuable information for a) evaluation of thermally quenching parameters ( W\, C) b) shift of peak maximum temperature (due to thermal quenching)\, c) the influence on the symmetry factor d) the kinetics order of the glow- peak and e) influence of thermal quenching on the activation energy via di fferent methods of evaluating trapping parameters.\nThe investigation of t hermal quenching parameters\, C and W\, of quartz and their single pair of prevalence values of W and C were determined\; Searching of prevalent val ues of the thermal quenching parameters i.e. the activation energy W and t he dimensionless parameter C from the quartz samples of various origins. T he observations of influence of thermal quenching parameters were analyzed from quartz samples annealed at different temperature. One new set of the rmal quenching parameters were observed which we named as intermediate gro up of thermal quenching parameters. However\, the prevalence pair of therm al quenching parameters of quartz was observed within the narrow range of values of W and C but it was not able to depict particular prevalent pair of thermal quenching parameters for the peaks of high temperature region. Finally the prevalent pair of thermal quenching parameters were selected w hich satisfy the entire glow peaks of glow curves. These details will be t he crucial in the applied fields of TL and OSL such as dating\, authentici ty testing\, archaeological and geological study. \nThe reconstruction att empt of thermoluminescence glow curve of quartz samples was performed. The consistency of the reconstructed thermoluminescence glow peaks was observ ed by retransforming to quenched glow peaks. It was followed by separate a nalysis to observe consistency in their shape of glow peaks (in peak heigh t\, glow peak area and symmetry factor of glow peak) and trapping paramete rs with that of experimental quenched glow peaks. This study exhibit the r econstruction attempt was successful to provide alternative way to evaluat e trapping parameters of thermoluminescence glow curve. \n END:VEVENT END:VCALENDAR