Mild Steel V- TECH Thermoluminescence, Model: VT101
| I Deal In | New Only |
| Model | VT101 |
| Automation Type | Automatic |
| Warranty | 10 Month |
| Resolution | 0.1% |
may be colored in a number of ways (1) by the introduction of chemical impurities(2) by introducing an excess of the metal ion(3) by X-ray, g-ray, neutron and electron bombardment(4) by electrolysisColour centres produced by irradiation with X-raysWhen a X-ray quantum passes through an ionic crystal, it will usually give rise to a fast photo-electron with an energy of the same order as that of the incident quantum. Such electrons, because of their small mass, do not have sufficient momentum to displace ions and therefore loose their energy inproducing free electrons, holes, excitons and phonons. Evidently these while moving near the vacancies form trapped electrons as well as trapped holes. The trapped-electron or trapped-hole centres so formed can be destroyed (bleached) by illuminating the crystal with light of the appropriate wavelength or warming it.ThermoluminescenceImportant information about the colour centres can be obtained by measuring the changes that occur when a coloured crystal is gradually heated. As the temperature is raised electrons and holes escape from theirtraps at an increasing rate. The freed charges can recombine with each other or with other defects and give out luminescence by recombination.The resulting thermoluminescence or ‘glow’ reaches maximum and then decreases to zero as the supply of trapped electrons or holes becomes exhausted. The plot of luminescence intensity verses temperature, takenat a constant heating rate, is called the ‘glow curve’. It may contain one or many glow peaks, depending upon whether there are one or several different kinds of traps.From the glow curve one determine the trap depth; the deeper the trap, the higher the temperature of the glow peak. A correlation between the temperature at which thermoluminescence occurs and the temperature at which particular band bleach can give valuable information about specificcentres. Typical results obtained from this set-up forKCl crystal are shown in figure.The experiment consists of the followingEXPERIMENTAL SET-UP FOR CREATINGTHERMOLUMINESCENCE(1) Sample: KBr or KCl single crystal(2) Thermolumniscence Temperature Meter, TL-02· Digital Thermometer· Oven Power Supply(3 Sample Holder(4) Thermoluniscence Oven (0-423K)(5) Black BoxFOR MEASUREMENT OF LUMINESCENCEINTENSITY(1) Photomultiplier tube: 931A(2) PMT Housing with biasing circuit and coaxial cables etc.(3) High Voltage Power Supply, Model: EHT-11Output : 0-1500V variable (1mA max.)Regulation : 0.05%Display: 3½ digit 7-segment LED(4) Nanoammeter, Model DNM-121Range : 100nA to 100mA full scale in 4 rangesAccuracy : 0.2%.Display: 3½ digit 7-segment LEDNunes Instruments , is in the field of Instrumentation Sales Service & Repairswith 40 years of experience. We provide service & repairs to your old high precision instruments and equipment. We provide cost effective service & Repair to any brand, any make instruments with service warranty. W hy not try once?
Instruments of Any Type, Any Make, Analog/Digital, Any Condition Indian or Imported
- Laboratory Instrument, Test Equipment,
- Scientific, Measuring, Precision Instrument,
* Analytical, Bio Medical, Survey, Electrical,
* Electronic Instruments , Weather, Metrology.
Exports To: Bangladesh | Sri Lanka | Thailand | Philippines | Saudi Arabia
Nunes Instruments
Product Details
Company Details
Product Specification
| I Deal In | New Only |
| Model | VT101 |
| Automation Type | Automatic |
| Warranty | 10 Month |
| Resolution | 0.1% |
| Is It ISO Certified | ISO Certified |
| Brand | V Tech |
| Color | Mild Steel |
| Test Range | 0-10% |
Product Description
Pure alkali halide crystals are transparent throughout the visible region of the spectrum. The crystals
may be colored in a number of ways
(1) by the introduction of chemical impurities
(2) by introducing an excess of the metal ion
(3) by X-ray, g-ray, neutron and electron bombardment
(4) by electrolysis
Colour centres produced by irradiation with X-rays
When a X-ray quantum passes through an ionic crystal, it will usually give rise to a fast photo-electron with an energy of the same order as that of the incident quantum. Such electrons, because of their small mass, do not have sufficient momentum to displace ions and therefore loose their energy in
producing free electrons, holes, excitons and phonons. Evidently these while moving near the vacancies form trapped electrons as well as trapped holes. The trapped-electron or trapped-hole centres so formed can be destroyed (bleached) by illuminating the crystal with light of the appropriate wavelength or warming it.
Thermoluminescence
Important information about the colour centres can be obtained by measuring the changes that occur when a coloured crystal is gradually heated. As the temperature is raised electrons and holes escape from their
traps at an increasing rate. The freed charges can recombine with each other or with other defects and give out luminescence by recombination.
The resulting thermoluminescence or ‘glow' reaches maximum and then decreases to zero as the supply of trapped electrons or holes becomes exhausted. The plot of luminescence intensity verses temperature, taken
at a constant heating rate, is called the ‘glow curve'. It may contain one or many glow peaks, depending upon whether there are one or several different kinds of traps.
From the glow curve one determine the trap depth; the deeper the trap, the higher the temperature of the glow peak. A correlation between the temperature at which thermoluminescence occurs and the temperature at which particular band bleach can give valuable information about specific
centres. Typical results obtained from this set-up for
KCl crystal are shown in figure.
The experiment consists of the following
EXPERIMENTAL SET-UP FOR CREATING
THERMOLUMINESCENCE
(1) Sample: KBr or KCl single crystal
(2) Thermolumniscence Temperature Meter, TL-02
· Digital Thermometer
· Oven Power Supply
(3 Sample Holder
(4) Thermoluniscence Oven (0-423K)
(5) Black Box
FOR MEASUREMENT OF LUMINESCENCE
INTENSITY
(1) Photomultiplier tube: 931A
(2) PMT Housing with biasing circuit and coaxial cables etc.
(3) High Voltage Power Supply, Model: EHT-11
Output : 0-1500V variable (1mA max.)
Regulation : 0.05%
Display: 3½ digit 7-segment LED
(4) Nanoammeter, Model DNM-121
Range : 100nA to 100mA full scale in 4 ranges
Accuracy : 0.2%.
Display: 3½ digit 7-segment LED
Nunes Instruments , is in the field of Instrumentation Sales Service & Repairswith 40 years of experience. We provide service & repairs to your old high precision instruments and equipment. We provide cost effective service & Repair to any brand, any make instruments with service warranty. W hy not try once?
Instruments of Any Type, Any Make, Analog/Digital, Any Condition Indian or Imported
- Laboratory Instrument, Test Equipment,
- Scientific, Measuring, Precision Instrument,
- Analytical, Bio Medical, Survey, Electrical,
- Electronic Instruments ,Weather, Metrology.
About the Company
Our professionals have several years of experience and are thoroughly trained in all aspects of Instruments repair and service work of Measuring Instruments, Laboratory Instruments, Control Instruments and Test Equipment. We sell and supply all kind of spare parts for Laboratory Instruments and Equipments. We are interested in associating with reputed manufacturers and distributors to work as their authorized dealers and authorized service centers. Our Estimated clients are Southern Railway, Salem Steel Plant, Steel Authority of India Limited, Roots Industries Limited (Coimbatore), The Sree Meenakshi Mills Limited and many others.
Company Video
Seller Contact Details
11a/1, 11a/2, Sundaram Street, Coimbatore - 641027, Tamil Nadu, India
Get Directions