Ionizing Radiation
Ionizing Radiation - Related Videos
09:28
Evaluation of the Spatial Distribution of γH2AX following Ionizing Radiation
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Cited by 7 •
2010
Microscopic analysis of γH2AX foci, which form following the phosphorylation of H2AX at Ser-139 in response to DNA double-strand breaks, has become an invaluable tool in radiation biology. Here we used an antibody to mono-methylated histone H3 at lysine 4 as an epigenetic marker of actively transcribing euchromatin, to evaluate the spatial distribution of radiation-induced γH2AX formation within the nucleus.
06:21
Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model
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Cited by 13 •
2016
We present a diffuse optical spectroscopic (DOS) approach that provides quantitative optical biomarkers of skin response to radiation. We describe DOS instrumentation design, optical parameters extraction algorithms and the animal handling procedures required to yield representative data from a pre-clinical mouse model of radiation induced erythema.
02:59
Biological Effects of Radiation
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2020
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 produce ions...
03:12
Ionization Energy
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2020
The amount of energy required to remove the most loosely bound electron from a gaseous atom in its ground state is called its first ionization energy (IE1). The first ionization energy for an element, X, is the energy required to form a cation with 1+ charge: The energy required to remove the second most loosely bound electron is called the second ionization energy (IE2). The energy required to remove the third electron is the third ionization energy, and so on. Energy is always required...
08:17
Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy
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Cited by 9 •
2015
Stereotactic ablative body radiation therapy (SBRT) involves the precise delivery of high-dose radiation to cancer tumor targets. A novel SBRT platform offers a first-of-its-kind gimbaled radiation accelerator mounted within a pivoting O-ring gantry capable of dynamic image-guided tumor tracking. Here, we describe dynamic tumor tracking for lung targets.
FAQs
Chemical outcomes depend on whether deposited energy causes ionization, excitation, or both. Ionization creates charged ions, while excitation places atoms or molecules in higher-energy states. These energized species can then participate in subsequent chemistry. In a reaction system, the distinction helps explain why radiation may initiate bond breaking, molecular rearrangement, or formation of new products.
Radiation dose, radiation type, and molecular structure jointly influence the chemical outcome. Dose describes the extent of radiation input, while radiation type and the structure of the target affect how that energy interacts with the system. Considering these variables together helps researchers predict whether transformations such as bond breaking, rearrangement, or new reaction formation may occur.
Radicals are important reactive species formed during radiation-driven energy transfer. Because they can initiate bond breaking, molecular rearrangement, or new chemical reactions, their formation connects ionization and excitation with observable changes in a chemical system. Studying these species helps chemists interpret reaction mechanisms and understand how radiation converts energy input into altered molecular products.
Both electromagnetic energy and energetic particles can produce radiation-driven chemical change, but radiation type remains an important experimental variable. Its effects must be considered together with dose and molecular structure rather than treated independently. This comparison helps researchers interpret why related chemical systems may undergo different transformations and supports more accurate prediction of radiation-induced outcomes.
A study can begin by defining the molecular system, selecting a radiation type, and controlling the dose as experimental variables. Researchers then relate the resulting chemical changes to ionization, excitation, and reactive-species formation. This workflow supports analytical chemistry and reaction-mechanism studies because it links controlled energy input with changes such as bond breaking, rearrangement, or new product formation.
Ionizing radiation supports several chemistry applications, including analytical chemistry, radiation chemistry, sterilization, and polymer modification. In these areas, researchers use radiation-driven transformations to examine chemical change, alter materials, or support treatment processes. The relevant outcome depends on the radiation type, dose, and molecular structure, which together help determine how the chemical system responds.
Radiation-driven chemical transformations provide a basis for applications in environmental treatment and nuclear technology. In both contexts, understanding how dose, radiation type, and molecular structure control chemical outcomes helps researchers interpret and guide changes in matter. These applications also connect practical technologies with radiation chemistry and the study of reaction mechanisms.