activity
as defined in Proposal for a COUNCIL DIRECTIVE laying down basic safety standards for…, Article 4, point (144)
the activity, A, of an amount of a radionuclide in a particular energy state at a given time. It is the quotient of d N by d t , where d N is the expectation value of the number of spontaneous nuclear transitions from that energy state in the time interval d t : [pic] The unit of activity is the Becquerel
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Also defined in
- Regulation (EU) 2024/3012 of the European Parliament and of the Council of 27 November 2024 establishing a Union… 32024R3012, Article 2, point (3)
(3) ‘activity’ means one or more practices or processes carried out by an operator, or a group of operators, resulting in a permanent carbon removal, a temporary carbon removal through carbon farming or through carbon storage in products, or soil emission reductions through carbon farming where… - Council Directive 2013/59/Euratom of 5 December 2013 laying down basic safety standards for protection against the… 32013L0059, Article 4, point (5)
the activity of an amount of a radionuclide in a particular energy state at a given time. It is the quotient of dN by dt, where dN is the expectation value of the number of nuclear transitions from that energy state in the time interval dt: The unit of activity is the becquerel (Bq)