Changes

=== Radioactivity, Radiation, Health Physics, and Radiation Safety ===

=== Radioactivity, Radiation, Health Physics, and Radiation Safety ===

==== Becquerel ====

==== Becquerel ====

The '''becquerel''' (symbol Bq, for [[Henri Becquerel]]) is that amount of [[activity]] of a radioactive substance represented by one decaying atom per second.

The '''becquerel''' (symbol Bq, for [[Henri Becquerel]]) is the amount of [[activity]] of a radioactive substance represented by one decaying atom per second.

==== Gray (Unit) ====

==== Gray (Unit) ====

The '''gray''' (symbol Gy) is that [[absorbed dose]] of radiation that imparts one joule of energy to one kilogram of target mass. To calculate, divide imparted energy by mass.

The '''gray''' (symbol Gy) is the [[absorbed dose]] of radiation that imparts one joule of energy to one kilogram of target mass. To calculate, divide imparted energy by mass.

==== Sievert ====

==== Sievert ====

The '''sievert''' (symbol Sv) is the unit of [[dose equivalent]]. It is the amount of energy it would take to deliver 1 joule of energy to 1 kg of tissue.

The '''sievert''' (symbol Sv) is the unit of [[dose equivalent]]. It is the amount of energy it would take to deliver 1 joule of energy to 1 kg of tissue.