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"""
"""
from ..unitquantity import UnitQuantity
from .time import s
from .mass import kg
from .energy import J
from .electromagnetism import coulomb
Bq = becquerel = UnitQuantity(
'becquerel',
1/s,
symbol='Bq',
aliases=['becquerels']
)
Ci = curie = UnitQuantity(
'curie',
3.7e10*becquerel,
symbol='Ci',
aliases=['curies']
)
rd = rutherford = UnitQuantity(
'rutherford',
1e6*Bq,
symbol='Rd',
aliases=['rutherfords'],
doc='this unit is obsolete, in favor of 1e6 Bq'
)
Gy = gray = Sv = sievert = UnitQuantity(
'gray',
J/kg,
symbol='Gy',
aliases=['grays', 'Sv', 'sievert', 'sieverts']
)
rem = UnitQuantity(
'rem',
1e-2*sievert,
aliases=['rems']
)
rads = UnitQuantity(
'rads',
1e-2*gray,
doc='''
rad is commonly used symbol for radian.
rads unit of radiation is deprecated.
'''
)
R = roentgen = UnitQuantity(
'roentgen',
2.58e-4*coulomb/kg,
symbol='R',
aliases=['roentgens']
)
del UnitQuantity, s, kg, J, coulomb
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