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如何确定辐射能量硬度？
本文内容：
- 辐射能量硬度（射束质量）指X射线或伽马射线的穿透能力，由其波长决定——波长越短，辐射越“硬”。
- 硬度与X射线源的管电压（kV）及同位素的能量（keV）直接相关，电压越高产生的辐射越硬、穿透力越强。
- 辐射根据能量谱从极软到超硬进行分类，其适用性取决于不同无损检测（NDT）应用场景。
- 半值厚度（HVT）是量化辐射硬度的关键指标，代表使射束强度降低50%所需的材料厚度。
- 理解辐射硬度至关重要，它能优化工业射线照相中的成像质量、保障操作安全并优化检测参数选择。
Radiation hardness (beam quality) depends on wavelength. Radiation is called hard when its wavelength is small and soft when its wavelength is long. In industry the quality of the X-ray tube ranges from very soft to ultra hard. The beam quality is related to a tube voltage (kV) range, or keV for isotopes.
The first two columns of the table on the right side indicate the relationship hardness/tube voltage range applied in NDT. The third column gives the related qualification of the radiation effect, i.e. half-value thickness (HVT), described in detail in a later blog article.
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