collect

python package to collect nuclear data inputs

installation

move into the collect directory and run

pip install .

to install the package

RIPL Discrete Levels

to collect the discrete levels in the RIPL database, use the collect.ripl.DiscreteLevel object, with the isotope mass number A and either Z or the chemical symbol X:

import collect

levels = collect.ripl.DiscreteLevels(Z=26,A=56)

or

import collect

levels = collect.ripl.DiscreteLevels(X='Fe',A=56)

The DiscreteLevels object has some basic information about the isotope:

• A - mass number
• Z - charge number
• X - chemical symbol
• symbol - isotope symbol, AAAXX
• num_levels - number of levels
• num_transitions - total number of gammas in the level scheme
• num_complete - number of levels in the RIPL complete level scheme
• Sn - neutron separation energy in MeV
• levels - list of Level objects

The Level objects have information about each level:

• index - Index of the level
• energy - Energy of the level in MeV
• spin - Spin of the level
• parity - Parity of the level (-1 or 1)
• half_life - half-live of the level in seconds
• num_transitions - number of transitions from this level
• transitions -The transitions from this level, a list of Transition objects

The Transition objects have information about each transition from the level:

• initial_index - Index of the initial level
• final_index - Index of the final level
• energy - Energy of the transition in MeV
• probability - Probability that the initial level will decay by this transition
• gamma_probability - Probability that the initial level will decay by this transition, and by emission of a gamma (not internal conversion)