Ionizing Radiation Detection with Adsorption Layer
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Solution Overview
Problem
Current methods for detecting ionizing radiation, particularly alpha particles, are inefficient and time-consuming due to high absorption and scattering probabilities, and are not suitable for isotopes with short half-lives, requiring complex sample preparation and equipment.
Innovation Solution
A detection system with a semiconductor detector featuring a thin adsorption layer on its surface to bind target particles, reducing absorption and scattering of ionizing radiation and increasing detection efficiency and spectral resolution, using chemisorption or physisorption to immobilize particles close to the detection zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional detection method with complex sample preparation is used, then detection reliability may be improved, but detection time increases and productivity decreases
Solution Approach 1:
The invention merges the sample preparation function and detection function into a single integrated system. The detection device includes a detection chamber with an adsorption surface that directly captures target particles from the sample, eliminating the need for separate electrodeposition and vacuum chamber transfer steps. This integration maintains detection reliability while dramatically reducing preparation time and increasing productivity.
2Measurement precision
If electrodeposition sample preparation is used, then detection precision may be improved, but preparation time increases and is not suitable for short half-life isotopes
Solution Approach 1:
The detection chamber is pre-equipped with an adsorption surface prepared in advance to capture target particles. This preliminary preparation eliminates the need for time-consuming electrodeposition and vacuum transfer steps when detecting short half-life isotopes, while maintaining spectral resolution through the controlled adsorption environment.
Solution Approach 2:
The adsorption surface acts as an intermediary between the sample and the semiconductor detector. It captures target particles directly from the liquid or gaseous sample and holds them in close proximity to the detection zone, enabling rapid detection of short half-life isotopes without compromising measurement precision.
3Quantity of substance
If a thick substrate is used for adsorption, then particle binding capacity increases, but absorption and scattering of ionizing radiation increases
Solution Approach 1:
The invention applies local quality by creating a thin adsorption layer (nanometer to micrometer scale) on the detection surface rather than using a thick substrate. This thin layer provides sufficient particle binding capacity through high surface area while minimizing absorption and scattering of ionizing radiation, as the layer thickness is optimized to balance these competing requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates fast and reliable detection of ionizing radiation, including short-range particles like alpha particles, with improved spectral resolution and reduced preparation time, suitable for isotopes with short half-lives.
Implementation Method 1
using chemisorption or physisorption to immobilize particles close to the detection zone
Implementation Method 2
using chemisorption or physisorption to immobilize particles close to the detection zone
Implementation Method 3
the detector may comprise a detection zone, in which the ionizing radiation is to be detected, e.g. a p-n junction in a semiconductor detector... configured to generate a measurement signal, in particular an electric measurement signal, when ionizing radiation reaches the detection zone, e.g. through the generation of electron-hole pairs
Implementation Method 4
an absorption probability of the ionizing radiation in the detection surface is less than 5%, in one example less than 1% of an absorption probability in the detection zone
Data Source
AI summary
The invention provides a detection system for ionizing radiation, a method of manufacturing a detection system for ionizing radiation, a method of detecting ionizing radiation, a detection chamber for detecting ionizing radiation by liquid scintillation counting, and a method of detecting ionizing radiation by liquid scintillation counting. The detection system for ionizing radiation comprises a detector with a detection surface. The detector is configured to detect ionizing radiation that is incident on the detection surface. An adsorption layer is provided on said detection surface, the adsorption layer being configured to bind target particles, wherein the target particles are radioactive atoms or molecules.