Personal dose equivalent for strongly-penetrating radiation

Deep Dose Equivalent or Personal Dose Equivalent for Strongly-Penetrating Radiation... 

Use of Personal Dose Equivalent for Strongly-Penetrating Radiation Values Determined from Two Personal Monitors to Estimate Effective Dose Equivalent or Effective Dose... 

It is not practical in the work environment to measure the absorbed doses in the various organs and tissues necessary to compute He or E directly. Therefore, a number of quantitative relationships between He or E and various field or operational quantities have been developed and are available in the literature. The operational quantity named personal dose equivalent, HJ d), has been developed for the purpose of personal monitoring (ICRU, 1992), where d is the depth below a specified point on the body. For strongly-penetrating radiation, a depth of 10 mm is employed and the quantity is then specified as H iVS). The relationship between He or E and /fp(lO) is the most practical for use in determining He or E to workers for external exposure to low-LET radiation. 

Use of Personal Dose Equivalent for a Strongly-Penetrating Radiation Value Determined with One Personal Monitor as a Surrogate for Effective Dose Equivalent... 

This quantity is defined by the ICRU, not by the ICRP, and is used mainly for operational aims in measurement of the radiation impact together with the quantities of directional dose equivalent and personal dose equivalent (see description of equivalent dose). The quantity ff (d) at a point in the radiation field is defined as the dose equivalent that would be produced by the corresponding aligned and expanded field in the ICRU-sphere at a depth d on the radius opposing the direction of the aligned field. The depth d = 10 mm is recommended for strongly penetrating radiation such as y- or neutron radiation. 

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