TLD-(THERMOLUMINESCENT DOSIMETER)

Let’s start this post -TLD-(THERMOLUMINESCENT DOSIMETER)

INTRODUCTION

TLD badge mainly a plastic cassettes and nickel-plated aluminium, containing 3 disc.1- metallic filter,2-plastic transparent, 3-open window.

TLD is capable of using absorbed doses from about 1m rad to thousands of rads (accuracy +,-10%)

TLD badge is more accurate than film badge it consists CaSo4 (calcium sulphate )with Dy(dysprosium 0.05%), ratio – 3:1

CaSo4 also called thermoluminescent material, another most common type of TLD like calcium fluoride, lithium fluoride, beryllium oxide etc.

TLD-badges are radiation recording device which is sensitive to X-ray, Gama ray and Beta radiation, (dose range 10 mR to10,000 mR) Badge service is conducted on a quarterly basis and they are sent to BARC (Bhabha atomic research centre Mumbai ) for dose evaluation.

Also, Ultra tech laboratory private limited Kumhari, Raipur (Chhattisgarh ) provide personnel monitoring service under the supervision of BRAC (Bhabha atomic research centre Mumbai )

In 1975 BARC developed TLD badge system.
BARC is ested on 1954 in the name of Dr Homi Jehangir Bhabha(Birth on 30 Oct 1909- Died on 24 Jan 1966)

Advantage

Fast reading capabilities of radiation
For making patient exposures and making other exposure measurements.
Less given false reading due to environmental condition, such as heat, light, pressure.

Uses of TLD

TLD badges are used medical procedure as radiology, radiotherapy, nuclear medicine and all work in radiation-related research.
TLD badges hang inside the lead apron on chest position of a technician or Profesnnel worker, Doctors who work on radiation-related area.

Proper use (PPE) personal protective equipment-