Prompt Fission Gamma Spectrum

### initializations and import libraries
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.gridspec as gridspec
%matplotlib inline
%pylab inline

from CGMFtk import histories as fh

Populating the interactive namespace from numpy and matplotlib

### rcParams are the default parameters for matplotlib
import matplotlib as mpl

print ("Matplotbib Version: ", mpl.__version__)

mpl.rcParams['font.size'] = 18
mpl.rcParams['font.family'] = 'Helvetica', 'serif'
#mpl.rcParams['font.color'] = 'darkred'
mpl.rcParams['font.weight'] = 'normal'

mpl.rcParams['axes.labelsize'] = 18.
mpl.rcParams['xtick.labelsize'] = 18.
mpl.rcParams['ytick.labelsize'] = 18.
mpl.rcParams['lines.linewidth'] = 2.

font = {'family' : 'serif',
        'color'  : 'darkred',
        'weight' : 'normal',
        'size'   : 18,
        }

mpl.rcParams['xtick.major.pad']='10'
mpl.rcParams['ytick.major.pad']='10'

mpl.rcParams['image.cmap'] = 'inferno'

Matplotbib Version:  3.1.3

First, we load the history file

hist = fh.Histories('98252sf.cgmf')

98252sf.cgmf

Only gamma-ray energies in the laboratory frame are saved in the history files

Elab = hist.getGammaElab()

As for the neutrons, we can pull out the list of energies from individual fragments

print (Elab[5])

[1.075, 0.819, 1.433]

The PFGS can be easily calculated with CGMFtk and plotted

ebins,pfgs = hist.pfgs()

# construct and plot the prompt gamma spectrum
fig = plt.figure(figsize=(16,6))
plt.subplot(121)
ebins,pfgs = hist.pfgs()
plt.step(ebins,pfgs,where='mid')
plt.xlim(0,5)
plt.xlabel(r'Outgoing $\gamma$ energy (MeV)')
plt.ylabel('PFGS')
plt.subplot(122)
plt.step(ebins,pfgs,where='mid')
plt.xlim(0.1,5)
plt.xscale('log')
plt.yscale('log')
plt.xlabel(r'Outgoing $\gamma$ energy (MeV)')
plt.ylabel('PFGS')
plt.ylim(1e-2,30)
plt.tight_layout()
plt.show()