def plotxs(path):
lib = Library(path)
xs_data = lib.get_xs(922350000, 16)[0]
fig = plt.figure()
Eints, sigmas = xs_data['e_int'], xs_data['xs']
plt.step(Eints, sigmas, where = "pre")
plt.suptitle(r'(n, 2n) Reaction in $^{235}$U')
plt.ylabel(r'$\sigma(E)$ (barns)')
plt.xlabel(r'$E_{int} (eV)$')
plt.xscale('log')
plt.yscale('log')
plt.show()
def test_loadtape():
download_file("http://www.nndc.bnl.gov/endf/b6.8/tapes/tape.100",
"endftape.100", "b56dd0aee38bd006c58181e473232776")
testlib = Library("endftape.100")
exp_nuclides = set(
[10010000, 30060000, 40090000, 50110000, 30070000, 60000000, 50100000])
obs_nuclides = set(map(int, testlib.structure.keys()))
assert_equal(exp_nuclides, obs_nuclides)
def test_photoatomic():
try_download("https://www-nds.iaea.org/fendl30/data/atom/endf/ph_3000_30-Zn.txt",
"Zn.txt", 'e6bda2fe6125ad9a8d51a6405ae9cc2a')
photondata = Library('Zn.txt')
xs_data = photondata.get_xs(300000000, 501)[0]
Eints, sigmas = xs_data['e_int'], xs_data['xs']
assert_equal(len(Eints),1864)
assert_equal(len(sigmas),1864)
assert_array_equal(Eints[0:5],[1., 1.109887, 1.217224,
1.2589, 1.334942])
assert_array_equal(Eints[-5:],[6.30960000e+10, 7.94328000e+10,
7.94330000e+10, 8.00000000e+10,
1.00000000e+11])
assert_array_almost_equal(sigmas[0:5],[0.00460498, 0.00710582,
0.01047864, 0.01210534,
0.01556538])
assert_array_almost_equal(sigmas[-5:],[ 6.71525 , 6.716781, 6.716781,
6.716829, 6.717811])
def test_u235():
try_download(
"http://t2.lanl.gov/nis/data/data/ENDFB-VII.1-neutron/U/235",
"U235.txt",
"1b71da3769d8b1e675c3c579ba5cb2d3",
)
u235 = Library("U235.txt")
nuc = 922350000
u235._read_res(nuc)
u235._read_xs(nuc, 37)
exp_a = array_from_ENDF(
io.BytesIO(
b""" 9.223500+4 2.330248+2 0 0 0 0
-1.788560+7-1.788560+7 0 0 1 6
6 2 """ + b"""
1.796240+7 5.05980-10 1.800000+7 3.810030-7 1.850000+7 8.441785-5
1.900000+7 2.387410-4 1.950000+7 1.348763-3 2.000000+7 4.785594-3
"""))
obs = u235.structure[nuc]["data"][nuc]["xs"][37][0]
exp = {
"intpoints": 6,
"intschemes": 2,
"e_int": exp_a[3:5].flat[::2],
"xs": exp_a[3:5].flat[1::2],
}
for key in obs:
assert_array_equal(obs[key], exp[key])
def ignore_future_warnings(func):
"""This is a decorator which can be used to ignore FutureWarnings
occurring in a function."""
def new_func(*args, **kwargs):
with warnings.catch_warnings():
warnings.filterwarnings("ignore", category=FutureWarning)
return func(*args, **kwargs)
new_func.__name__ = func.__name__
new_func.__doc__ = func.__doc__
new_func.__dict__.update(func.__dict__)
return new_func
tape1path = "files_test_endf/sampletape1"
library = Library(tape1path)
nuc1002, nuc1003, nuc40000 = nucname.id(1002), nucname.id(1003), nucname.id(
40000)
library._read_res(nuc1002)
library._read_res(nuc1003)
library._read_res(nuc40000)
nuc40040 = nucname.id(40040)
def array_from_ENDF(fh):
"Convert a chunk of ENDF, stripped of metadata, into a numpy array."
return np.genfromtxt(
fh,
dtype="float",
delimiter=11,
converters={