ISO 12789-2:2008 参照放射場—シミュレートされた職場の中性子場—パート2：基本量に関連する校正の基礎 | ページ 5

2.1

indication

reading

M

quantity value provided by a measuring instrument or a measuring system

Note 1 to entry: An indication may be presented in visual or acoustic form or may be transferred to another device. An indication is often given by the position of a pointer on the display for analog outputs, a displayed or printed number for digital outputs, a code pattern for code outputs, or an assigned quantity value for material measures.

Note 2 to entry: An indication and a corresponding value of the quantity being measured are not necessarily values of quantities of the same kind.

[SOURCE: ISO/IEC Guide 99:2007, 4.1]

2.2

conventional quantity value

conventional value of a quantity

quantity value attributed by agreement to a quantity for a given purpose

Note 1 to entry: The term “conventional true quantity value” is sometimes used for this concept, but its use is discouraged.

Note 2 to entry: Sometimes a conventional quantity value is an estimate of a true quantity value.

Note 3 to entry: A conventional quantity value is generally accepted as being associated with a suitably small measurement uncertainty, which might be zero.

[SOURCE: ISO/IEC Guide 99:2007, 2.12]

2.3

neutron fluence

Φ

Note 1 to entry: The unit of the neutron fluence is metres to the negative 2 (m⁻²).

2.4

neutron fluence rate

φ

Note 1 to entry: The unit of neutron fluence rate is metres to the negative 2 times reciprocal seconds (m⁻² s⁻¹).

Note 2 to entry: This quantity is also termed neutron flux density.

2.5

energy distribution of the neutron fluence

Φ _E

Note 1 to entry: The unit of the energy distribution of the neutron fluence is metres to the negative 2 times reciprocal joules (m⁻²·J⁻¹)

2.6

energy and direction distribution of the neutron fluence

Φ_{E ,Ω}

Note 1 to entry: The unit of the energy and direction distribution of the neutron fluence is metres to the negative 2 times reciprocal joules times reciprocal steradians (m⁻² J⁻¹sr⁻¹).

2.7

ambient dose equivalent at 10 mm depth

H^*(10)

dose equivalent at a point in the radiation field that would be produced by the corresponding expanded and aligned field, in the ICRU sphere at a depth of 10 mm on the radius opposite the direction of the aligned field

Note 1 to entry: The unit of ambient dose equivalent is joules times reciprocal kilograms (J kg⁻¹) with the special name of sievert (Sv).

2.8

personal dose equivalent at 10 mm depth

H_p(10)

dose equivalent in soft tissue at a depth of 10 mm below a specified point on the body

Note 1 to entry: The unit of personal dose equivalent is joules times reciprocal kilograms (J kg⁻¹) with the special name of sievert (Sv).

Note 2 to entry: In ICRU Report 47 ^[12] , the ICRU considers the definition of the personal dose equivalent to include the dose equivalent at a depth, d , in a phantom having the composition of ICRU tissue. Then, H_p(10) for the calibration of personal dosemeters is the dose equivalent at a depth of 10 mm in a phantom composed of ICRU tissue, but of the size and shape of the phantom used for calibration (30 cm × 30 cm × 15 cm parallelepiped) and the conversion coefficients, h_p,slab(10), are calculated for this configuration.

2.9

neutron fluence-to-dose-equivalent conversion coefficient

h_Φ

Note 1 to entry: Any statement of a fluence-to-dose-equivalent conversion coefficient requires a statement of the type of dose equivalent, e.g. ambient dose equivalent h^*_Φ or personal dose equivalent h_{p,slab Φ} .

2.10

response

R

indication or reading divided by the conventional value of the quantity causing it

2.11

calibration factor

N

reciprocal of the response when the response is determined under reference conditions

Note 1 to entry: The calibration factor is the coefficient by which the reading, M , is multiplied to obtain the value of the quantity to be measured.

2.12

energy dependence of response with respect to fluence

R_Φ (E)

response, R , with respect to fluence, Φ, as a function of neutron energy, E

2.13

energy dependence of response with respect to dose equivalent

R_H (E)

response, R , with respect to dose equivalent, H , as a function of neutron energy, E

2.14

point of test

point in the radiation field at which the conventional value of a quantity being measured is determined.

2.15

reference point

point placed at the point of test for calibrating or testing purposes