Related Experiment Video
Updated: Mar 31, 2026
06:28
Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
13.4K
Photon energy conversion efficiency in gamma-ray spectrometry.
1Slovak Institute of Metrology, Karloveska 63, 842 55 Bratislava, Slovak Republic.
Summary
A new photon energy conversion efficiency coefficient, unaffected by coincidence phenomena, is introduced for gamma-ray spectrometry. This parameter aids in calibrating radionuclide samples, especially at close geometries.
Area of Science:
- Nuclear Physics
- Spectroscopy
- Radiation Detection
Background:
- Gamma-ray spectrometry is crucial for radionuclide analysis.
- Existing efficiency parameters can be affected by coincidence effects.
- Accurate calibration is essential for reliable measurements.
Purpose of the Study:
- Introduce a novel efficiency parameter for gamma-ray spectrometry.
- Address limitations of existing methods, particularly coincidence phenomena.
- Enhance accuracy in radionuclide sample measurements.
Main Methods:
- Defined photon energy conversion efficiency coefficient as a ratio.
- Calculated the coefficient from conventional gamma-ray histograms.
- Demonstrated its independence from coincidence phenomena.
Main Results:
- The new coefficient is unaffected by coincidence effects.
- This parameter is suitable for close geometry measurements.
- It offers a complementary approach to existing efficiency parameters.
Conclusions:
- The photon energy conversion efficiency coefficient provides a valuable tool for gamma-ray spectrometry.
- It improves calibration and measurement accuracy for radionuclide samples.
- This parameter may influence future spectral display and processing methods.
Related Concept Videos
01:16Spectrophotometry: Introduction
11.1K
Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
11.1K
02:26Photoelectric Effect
41.1K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
41.1K
01:23Photoluminescence: Fluorescence and Phosphorescence
5.1K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
5.1K
01:25Fluorescence and Phosphorescence: Instrumentation
1.9K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
1.9K
01:22Atomic Emission Spectroscopy: Instrumentation
1.6K
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
1.6K
01:14UV–Vis Spectrometers
4.5K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
4.5K