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Line 97: − ==== Curie ====+ − The '''curie''' (symbol Ci, for [[Marie Curie]]) is obsolete today. Its original definition was "the amount of radioactivity in one gram of [[radium]]-226." Madame Curie, of course, is most famous as the discoverer of radium. One curie is equal to 3.7 * 10<sup>10</sup> becquerel.+
International System of Units (view source)
Revision as of 23:11, April 22, 2007
, 23:11, April 22, 2007→Curie
==== 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 that 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 that [[absorbed dose]] of radiation that imparts one joule of energy to one kilogram of target mass. To calculate, divide imparted energy by mass.