Related Experiment Video
Updated: Dec 16, 2025
06:28
Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
13.1K
EFFECT OF BUILDUP FACTORS ON INDOOR GAMMA DOSE RATE
V Manić1, G Manić2, D Nikezić3,4
1Department of Physics, University of Niš, PO Box 224, 18000 Niš, Serbia.
Radiation Protection Dosimetry
|July 7, 2020
Summary
Radiation buildup factors significantly increase absorbed dose rates and effective doses from primordial radionuclides in building materials, contributing up to 41%. This study quanties this effect in concrete and brick rooms.
Area of Science:
- Radiological Physics
- Radiation Dosimetry
- Environmental Health
Background:
- Primordial radionuclides in building materials emit gamma rays, contributing to indoor radiation exposure.
- Radiation shielding and dose calculations are crucial for assessing health risks.
- Buildup factors account for scattered radiation, influencing dose assessments.
Purpose of the Study:
- To investigate the impact of buildup factors on absorbed dose rate in air and effective dose.
- To quantify the contribution of radiation buildup to total dose from building materials.
- To compare different buildup factor models in various room scenarios.
Main Methods:
- Calculated specific absorbed dose rates in air for standard concrete, brick, and covering material room models.
- Applied Harima (G-P) buildup factors to all models.
- Utilized Berger's and Taylor's buildup factors for the standard concrete room model.
Main Results:
- Radiation buildup was found to contribute significantly, up to 41%, to absorbed dose rate and effective dose.
- Different buildup factor models showed variations in dose calculations.
- Dose rates were assessed for various building material compositions.
Conclusions:
- Buildup factors are essential for accurate dose assessment from gamma rays in building materials.
- The contribution of radiation buildup to effective dose is substantial and must be considered.
- This research highlights the importance of considering scattered radiation in indoor dosimetry.
More Related Videos
Related Concept Videos
02:59Biological Effects of Radiation
17.3K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
17.3K
01:35Mutations
42.4K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
42.4K
01:05Absorption of Radiation
1.1K
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
1.1K
03:23Types of Radioactivity
19.1K
The most common types of radioactivity are α decay, β decay, γ decay, neutron emission, and electron capture.
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
19.1K
01:20Conduction, Convection and Radiation: Problem Solving
2.1K
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
2.1K
02:48Radioactive Decay and Radiometric Dating
36.3K
Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
36.3K