What is BS IEC 61435 - High-purity germanium crystals for radiation detectors about?
BS IEC 61435 is an International Standard applicable to high-purity germanium crystals used for radiation detectors for gamma-rays and X-rays. Such germanium is monocrystalline and has a net concentration of fewer than 1011 electrically active impurity centers per cm3, usually of the order of 1010 cm 3.
BS IEC 61435 specifies terminology and test methods for measurements of basic characteristics of high-purity germanium crystals. These characteristics are net electrically active impurity concentrations (hereinafter (NA – ND)), deep-level impurity-centre concentration and crystallographic quality of crystals.
These test methods are not mandatory but have found general use in the industry and provide
verifiable and desired information to the detector manufacturer.
Test methods for completed assembled germanium detectors are given in IEC 60973 and IEC 60759.
Who is BS IEC 61435 - High-purity germanium crystals for radiation detectors for?
BS IEC 61435 on nuclear instrumentation is useful for:
- Nuclear power stations
- Atomic energy agencies
- Atomic research organizations
- Nuclear power plants electrical systems and equipment manufacturers
- Operators of NPP, systems evaluators and licensors
- Nuclear safety authorities
- Regulatory authorities
Why should you use BS IEC 61435 - High-purity germanium crystals for radiation detectors?
Advanced nuclear instrumentation is used for many sophisticated applications, such as precision imaging systems for medical diagnostics, remote sensors for environmental safety, or the probing and manufacturing of the most modern materials.
BS IEC 61435 provides you with the terminology and test methods for determining basic crystal parameters such as net electrically active impurity concentrations, deep-level impurity-center concentration and crystallographic quality of crystals. This helps you improve the functionality of radiation detectors for gamma-rays and X-rays.
With the terminology and test methods given in BS IEC 61435 for measurements of basic characteristics of high-purity germanium crystals, you can avoid problems in characterization resulting from the high resistivity of the material (~10 kâ‹…cm at 77 K), from the degree of impurity compensation, and from difficulties in suitably describing the impurity distribution in the large volume that may form a single device.
