在玛射线照射下,Ga2O3基于X射线探测器的性能降解
Xiao Ouyang1, Silong Zhang2, Tao Bai3
1School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China.
Micromachines
|March 27, 2025
概括
马射线辐射通过改变它们的导电过程来降解β-氧化物 (β-Ga2O3) X射线探测器. 这导致灵敏度,线性和速度降低,影响设备可靠性.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 辐射检测检测器可以检测到辐射.
背景情况:
- 氧化 (Ga2O3) 是辐射探测器的一个有希望的材料,因为它的宽带隙.
- 异质连接二极管 (HJD) 在X射线检测应用中使用.
- 了解这些设备的辐射影响对于它们的长期稳定性至关重要.
研究的目的:
- 为了研究p-NiO/β-Ga2O3 HJD在玛射线照射之前和之后的X射线反应性能.
- 确定影响探测器在辐射下性能的主导传导机制.
- 提供对基于Ga2O3的探测器中的辐射损伤和降解的见解.
主要方法:
- 一个p-NiO/β-Ga2O3异界二极管 (HJD) 的X射线探测器的制造.
- 在玛射线照射 (13.5 kGy(Si)) 之前和之后,在 -200 V 的X射线响应性能的表征.
- 泄漏电流和导电过程的分析,包括普尔-弗伦克尔辐射 (PFE).
主要成果:
- 在辐射之前,陷辅助导电影响了HJD性能,导致电流增加,非线性和响应缓慢.
- 在照射后,由于β-Ga2O3.3的载体度增加,普尔-弗伦克尔发射 (PFE) 变得占主导地位.
- 辐射诱导的PFE显著降低了探测器的灵敏度,输出线性和响应速度.
结论:
- 马射线照射对p-NiO/β-Ga2O3 HJD X射线探测器的性能产生负面影响.
- 主要导电机制的转变 (从陷辅助到PFE) 解释了观察到的性能下降.
- 这些发现为提高基于Ga2O3的辐射探测器在恶劣环境中的可靠性和稳定性提供了指导.
相关概念视频
Genetic Drift
39.1K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
39.1K
Mutation, Gene Flow, and Genetic Drift
57.7K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
57.7K
Gene Evolution - Fast or Slow?
7.0K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.0K
What is Population Genetics?
57.2K
A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
57.2K
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving
35
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
35
What is Genetic Engineering?
73.0K
Overview
73.0K


