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Use isomeric state, not excited state, for fission products.

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After a discussion with Dave Brown from BNL, it was confirmed that FPS in the
ENDF-6 format for fission product yields refers to the isomeric state, not the
excited state.
This commit is contained in:
Paul Romano 2016-11-21 14:10:40 -06:00
parent 91567fd9f4
commit 4e059a4d2b
1 changed files with 3 additions and 3 deletions
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6
openmc/data/decay.py
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@ -114,10 +114,10 @@ class FissionProductYields(EqualityMixin):
yields = {}
for j in range(n_products):
Z, A = divmod(int(values[4*j]), 1000)
excited_state = int(values[4*j + 1])
isomeric_state = int(values[4*j + 1])
name = ATOMIC_SYMBOL[Z] + str(A)
if excited_state > 0:
name += '_e{}'.format(excited_state)
if isomeric_state > 0:
name += '_m{}'.format(isomeric_state)
yield_j = ufloat(values[4*j + 2], values[4*j + 3])
yields[name] = yield_j