def minEdge(elm):
"""Example: minEdge("Ag")
Returns the lowest energy edge which is likely to be visible in an
EDS detector for the specified element"""
elm = dtsa2.element(elm)
if elm.getAtomicNumber() >= MinMElement:
res = epq.AtomicShell(elm, epq.AtomicShell.MV)
elif elm.getAtomicNumber() >= MinLElement:
res = epq.AtomicShell(elm, epq.AtomicShell.LIII)
else:
res = epq.AtomicShell(elm, epq.AtomicShell.K)
return res
def maxEdge(elm, e0, over=1.5):
"""Example: maxEdge("Ag", 20.0, 1.5)
Returns the highest energy edge which is excited with the overvoltage
specified (1.5) for the specified beam energy (20.0)."""
elm = dtsa2.element(elm)
e0 = epq.ToSI.keV(e0)
res = None
if elm.getAtomicNumber() > MinMElement:
sh = epq.AtomicShell.MV
if epq.AtomicShell.getEdgeEnergy(elm, sh) * over <= e0:
res = epq.AtomicShell(elm, sh)
if elm.getAtomicNumber() > MinLElement:
sh = epq.AtomicShell.LIII
if epq.AtomicShell.getEdgeEnergy(elm, sh) * over <= e0:
res = epq.AtomicShell(elm, sh)
sh = epq.AtomicShell.K
if epq.AtomicShell.getEdgeEnergy(elm, sh) * over <= e0:
res = epq.AtomicShell(elm, sh)
return res
