1""" 2""" 3from __future__ import absolute_import 4 5from ..unitquantity import UnitQuantity 6from .time import s 7from .mass import kg 8from .energy import J 9from .electromagnetism import coulomb 10 11 12Bq = becquerel = UnitQuantity( 13 'becquerel', 14 1/s, 15 symbol='Bq', 16 aliases=['becquerels'] 17) 18Ci = curie = UnitQuantity( 19 'curie', 20 3.7e10*becquerel, 21 symbol='Ci', 22 aliases=['curies'] 23) 24rd = rutherford = UnitQuantity( 25 'rutherford', 26 1e6*Bq, 27 symbol='Rd', 28 aliases=['rutherfords'], 29 doc='this unit is obsolete, in favor of 1e6 Bq' 30) 31Gy = gray = Sv = sievert = UnitQuantity( 32 'gray', 33 J/kg, 34 symbol='Gy', 35 aliases=['grays', 'Sv', 'sievert', 'sieverts'] 36) 37rem = UnitQuantity( 38 'rem', 39 1e-2*sievert, 40 aliases=['rems'] 41) 42rads = UnitQuantity( 43 'rads', 44 1e-2*gray, 45 doc=''' 46 rad is commonly used symbol for radian. 47 rads unit of radiation is deprecated. 48 ''' 49) 50R = roentgen = UnitQuantity( 51 'roentgen', 52 2.58e-4*coulomb/kg, 53 symbol='R', 54 aliases=['roentgens'] 55) 56 57del UnitQuantity, s, kg, J, coulomb 58