Thermal Neutron Capture γ's (CapGam)

Gamma rays observed following thermal-neutron capture are presented here in two forms:

• Ordered by gamma ray energy.
  For each gamma ray in this table, CapGam provides the three strongest gamma rays from that neutron capture.
• Organized by target nuclide.
  Each target dataset provides the intensity per 100 n-captures (I(γ)) of the strongest gamma ray, if it is known.

Gamma energies given are in kilo-electronvolts (keV).

Gamma intensities are given as percentages, relative to the strongest transition.
This is calculated as:

[I(γ) × 100] / I(γ)_max

where:

• I(γ) is the relative intensity of a gamma ray
• I(γ)_max is the relative intensity of the strongest gamma ray emitted by that target nuclide

All datasets are obtained from the Evaluated Nuclear Structure Data File (ENSDF) database.

CapGam and ENSDF are maintained by the National Nuclear Data Center (NNDC) at Brookhaven National Laboratory (BNL).

This website is maintained on behalf of the U.S. Nuclear Data Program (USNDP) and Nuclear Structure and Decay Data (NSDD) networks.