/
descriptor.py
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/
descriptor.py
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"""
Definition of descriptors.
"""
__all__ = [
"Element",
"AtomicShell",
"AtomicSubshell",
"XrayTransition",
"XrayLine",
"Language",
"Notation",
"Reference",
]
# Standard library modules.
import dataclasses
from collections.abc import Sequence
# Third party modules.
# Local modules.
# Globals and constants variables.
@dataclasses.dataclass(frozen=True, order=True)
class Element:
atomic_number: int
def __post_init__(self):
if self.atomic_number < 1 or self.atomic_number > 118:
raise ValueError(
"Atomic number ({0}) must be [1, 118]".format(self.atomic_number)
)
def __repr__(self):
return "{}(z={})".format(self.__class__.__name__, self.atomic_number)
@property
def z(self):
return self.atomic_number
@dataclasses.dataclass(frozen=True, order=True)
class AtomicShell:
principal_quantum_number: int
def __post_init__(self):
if self.principal_quantum_number < 1:
raise ValueError(
"Principal quantum number ({0}) must be [1, inf[".format(
self.principal_quantum_number
)
)
def __repr__(self):
return "{}(n={})".format(self.__class__.__name__, self.principal_quantum_number)
@property
def n(self):
return self.principal_quantum_number
@dataclasses.dataclass(frozen=True, order=True)
class AtomicSubshell:
principal_quantum_number: int
azimuthal_quantum_number: int
total_angular_momentum_nominator: int
def __post_init__(self):
if isinstance(self.principal_quantum_number, AtomicShell):
object.__setattr__(
self, "principal_quantum_number", self.principal_quantum_number.n
)
if (
self.principal_quantum_number is not None
and self.azimuthal_quantum_number is not None
):
lmin = 0
lmax = self.principal_quantum_number - 1
if (
self.azimuthal_quantum_number < lmin
or self.azimuthal_quantum_number > lmax
):
raise ValueError(
"Azimuthal quantum number ({0}) must be between [{1}, {2}]".format(
self.azimuthal_quantum_number, lmin, lmax
)
)
if (
self.azimuthal_quantum_number is not None
and self.total_angular_momentum_nominator is not None
):
jmin_n = 2 * abs(self.azimuthal_quantum_number - 0.5)
jmax_n = 2 * abs(self.azimuthal_quantum_number + 0.5)
if (
self.total_angular_momentum_nominator < jmin_n
or self.total_angular_momentum_nominator > jmax_n
):
raise ValueError(
"Total angular momentum ({0}) must be between [{1}, {2}]".format(
self.total_angular_momentum_nominator, jmin_n, jmax_n
)
)
def __repr__(self):
def _format(value):
return "*" if value is None else value
return "{}(n={}, l={}, j={:.1f})".format(
self.__class__.__name__, _format(self.n), _format(self.l), _format(self.j)
)
@property
def atomic_shell(self):
return AtomicShell(self.principal_quantum_number)
@property
def n(self):
return self.principal_quantum_number
@property
def l(self):
return self.azimuthal_quantum_number
@property
def j_n(self):
return self.total_angular_momentum_nominator
@property
def total_angular_momentum(self):
if self.total_angular_momentum_nominator is None:
return None
return self.total_angular_momentum_nominator / 2.0
@property
def j(self):
return self.total_angular_momentum
@dataclasses.dataclass(frozen=True)
class XrayTransition:
source_principal_quantum_number: int = None
source_azimuthal_quantum_number: int = None
source_total_angular_momentum_nominator: int = None
destination_principal_quantum_number: int = None
destination_azimuthal_quantum_number: int = None
destination_total_angular_momentum_nominator: int = None
def __init__(self, *args):
if len(args) == 6:
src_n, src_l, src_j_n, dst_n, dst_l, dst_j_n = args
elif len(args) == 2:
if isinstance(args[0], Sequence):
src_n, src_l, src_j_n = args[0]
elif isinstance(args[0], AtomicSubshell):
src_n = args[0].n
src_l = args[0].l
src_j_n = args[0].j_n
else:
raise ValueError("Unknown argument: {}".format(args[0]))
if isinstance(args[1], Sequence):
dst_n, dst_l, dst_j_n = args[1]
elif isinstance(args[1], AtomicSubshell):
dst_n = args[1].n
dst_l = args[1].l
dst_j_n = args[1].j_n
else:
raise ValueError("Unknown argument: {}".format(args[1]))
elif len(args) == 4:
if isinstance(args[0], Sequence):
src_n, src_l, src_j_n = args[0]
dst_n, dst_l, dst_j_n = args[1:]
elif isinstance(args[0], AtomicSubshell):
src_n = args[0].n
src_l = args[0].l
src_j_n = args[0].j_n
dst_n, dst_l, dst_j_n = args[1:]
elif isinstance(args[-1], Sequence):
src_n, src_l, src_j_n = args[:-1]
dst_n, dst_l, dst_j_n = args[-1]
elif isinstance(args[-1], AtomicSubshell):
src_n, src_l, src_j_n = args[:-1]
dst_n = args[-1].n
dst_l = args[-1].l
dst_j_n = args[-1].j_n
else:
raise ValueError("Unsupported number of arguments: {}".format(len(args)))
object.__setattr__(self, "source_principal_quantum_number", src_n)
object.__setattr__(self, "source_azimuthal_quantum_number", src_l)
object.__setattr__(self, "source_total_angular_momentum_nominator", src_j_n)
object.__setattr__(self, "destination_principal_quantum_number", dst_n)
object.__setattr__(self, "destination_azimuthal_quantum_number", dst_l)
object.__setattr__(
self, "destination_total_angular_momentum_nominator", dst_j_n
)
@classmethod
def is_radiative(cls, source_subshell, destination_subshell):
"""
Inspired from NIST EPQ library by Nicholas Ritchie.
"""
def electric_dipole_permitted(n0, l0, j0_n, n1, l1, j1_n):
delta_j_n = abs(j1_n - j0_n)
if delta_j_n > 2:
return False
assert delta_j_n == 0 or delta_j_n == 2
return abs(l1 - l0) == 1
def electric_quadrupole_permitted(n0, l0, j0_n, n1, l1, j1_n):
delta_j_n = abs(j1_n - j0_n)
if delta_j_n > 4:
return False
if j0_n == 1 and j1_n == 1:
return False
assert delta_j_n == 0 or delta_j_n == 2 or delta_j_n == 4
delta_l = abs(l1 - l0)
return delta_l == 0 or delta_l == 2
n0 = source_subshell.n
l0 = source_subshell.l
j0_n = source_subshell.j_n
n1 = destination_subshell.n
l1 = destination_subshell.l
j1_n = destination_subshell.j_n
if n0 == n1:
return False
if not (
electric_dipole_permitted(n0, l0, j0_n, n1, l1, j1_n)
or electric_quadrupole_permitted(n0, l0, j0_n, n1, l1, j1_n)
):
return False
return True
def __repr__(self):
def _format(value):
return "*" if value is None else value
return "{}([n={}, l={}, j={}] -> [n={}, l={}, j={}])".format(
self.__class__.__name__,
_format(self.source_principal_quantum_number),
_format(self.source_azimuthal_quantum_number),
_format(self.source_total_angular_momentum),
_format(self.destination_principal_quantum_number),
_format(self.destination_azimuthal_quantum_number),
_format(self.destination_total_angular_momentum),
)
@property
def source_subshell(self):
return AtomicSubshell(
self.source_principal_quantum_number,
self.source_azimuthal_quantum_number,
self.source_total_angular_momentum_nominator,
)
@property
def destination_subshell(self):
return AtomicSubshell(
self.destination_principal_quantum_number,
self.destination_azimuthal_quantum_number,
self.destination_total_angular_momentum_nominator,
)
@property
def source_total_angular_momentum(self):
if self.source_total_angular_momentum_nominator is None:
return None
return self.source_total_angular_momentum_nominator / 2.0
@property
def destination_total_angular_momentum(self):
if self.destination_total_angular_momentum_nominator is None:
return None
return self.destination_total_angular_momentum_nominator / 2.0
@dataclasses.dataclass(frozen=True)
class XrayLine:
element: Element
transition: XrayTransition
iupac: str = dataclasses.field(compare=False)
siegbahn: str = dataclasses.field(compare=False)
energy_eV: float = dataclasses.field(compare=False)
probability: float = dataclasses.field(default=None, compare=False)
relative_weight: float = dataclasses.field(default=None, compare=False)
def __post_init__(self):
if not isinstance(self.element, Element):
object.__setattr__(self, "element", Element(self.element))
if not isinstance(self.transition, XrayTransition):
object.__setattr__(self, "transition", XrayTransition(self.transition))
def __repr__(self):
return "{}({})".format(self.__class__.__name__, self.iupac)
@property
def atomic_number(self):
return self.element.atomic_number
@property
def z(self):
return self.element.atomic_number
@dataclasses.dataclass(frozen=True)
class Language:
key: str
def __post_init__(self):
lencode = len(self.key)
if lencode < 2 or lencode > 3:
raise ValueError("Code must be between 2 and 3 characters")
object.__setattr__(self, "key", self.key.lower())
def __repr__(self):
return "{}({})".format(self.__class__.__name__, self.key)
@dataclasses.dataclass(frozen=True)
class Notation:
key: str
def __post_init__(self):
if not self.key:
raise ValueError("Name cannot be empty")
object.__setattr__(self, "key", self.key.lower())
def __repr__(self):
return "{}({})".format(self.__class__.__name__, self.key)
@dataclasses.dataclass(frozen=True)
class Reference:
bibtexkey: str
author: str = None
year: int = None
title: str = None
type: str = None
booktitle: str = None
editor: str = None
pages: str = None
edition: str = None
journal: str = None
school: str = None
address: str = None
url: str = None
note: str = None
number: str = None
series: str = None
volume: str = None
publisher: str = None
organization: str = None
chapter: str = None
howpublished: str = None
doi: str = None
def __repr__(self):
return "{}({})".format(self.__class__.__name__, self.bibtexkey)