Contains basic information about a nuclide (isotope). Its primary key is the NUCLIDE_ID, which is composed from the mass number and proton number.

E.g. nuclide with NUCLIDE_ID=51124 is 124Sb.

Describes one nuclear level of a given nuclide. Contains level energy and lifetime information, and refers to its belonging nuclide.

E.g. level with NUCLEVEL_ID=511240002 is the E=10.86 keV level of 124Sb with HALFLIFE=93 sec.

Describes one specific isomer level (a nuclear level with practically significant life time). Contains a symbol for that isomer (e.g. “124Sb_m1”). Refers to the nuclear level which it belongs to. At most one isomer level may belong to a specific nuclide level.

E.g. ISOMER_ID=511241 refers to the isomer level of 93 sec mentioned before.

Describes one decay which starts from an isomer level. Also contains a descriptive name for that decay, e.g. “124SB IT DECAY (93 S)”. Zero, one or more decay may belong to a specific isomer.

E.g. DECAY_ID=5112410 is the isomer transition, and DECAY_ID=5112411 is the β- decay, both originating from the same 93 sec isomer of 124Sbm1.

Describes one radiation for a decay (or for another nuclear event). Contains energy and intensity information, and refers to its parent decay.

E.g. RADIATION_ID=”D05112411000001” is the 602.72 keV radiation of the 124Sbm1 isomer's β- decay.

This table contains radiation usage flags. One RadUsage record designates if a specific radiation may be used for a given task in HyperLab.

Usage types include “Energy calibration”, “Efficiency evaluation” etc. About their manipulation, see more details in Nuclear data library management.