Both of these measure gamma dose. CaF is more sensitive to low energy gammas than 7Lif. Neutron dosimetry is often made with the TLD-700 chip, which is made with 7Lif. Which, as we know, is sensitive to betas and gammas. The TLD-600 chip is made with 6LiF, which is sensitive to betas, gamma, and Neutrons.
Some cards use four TLD chips, arraigned as two pairs, to measure neutron dose.
A second pair is shielded with Cd from the rear. The readings of these four TLD chips is combined into an overall calculation of neutron dose. In the case of neutron dosimetry, it refers to the measurement of neutrons that are moderated and reflected from the body. Most neutron dosimetry uses this principal of reflection. With four independent detection elements, the badge can measure dose from beta, gamma, x-ray, or neutron radiation over a wide range of energies.