Disk sources are designed for use as reference sources.
Typical applications include: teaching, training, research, radiation protection, and up-and-coming technologies.
Radioactive material handling license issued by the Philippine Nuclear Research Institute is a requirement prior to the sale of all sources, even exempted quantity ones.
ALPHA DISK SOURCES
Alpha disk sources is designed for use as reference sources. The radioacitve material is chemically plated on to the surface of a silver disk that is mounted at the bottom of the well of a Plexiglas® disk. The completed sources are unsealed and offered in two sizes: 1.0” x 0.125” and 2.0” x 0.125”.
| Nuclide | Minimum Activity | Maximum Activity |
| Polonium 210 | 0.05 µCi (1.85 kBq) | 0.1 µCi (3.7 kBq) |
BETA/GAMMA DISK SOURCES
Beta/Gamma disk sources are designed for use as reference sources. Each source is constructed using a Plexiglas® disk and is offered in two sizes: 1.0” x 0.125” and 2.0” x 0.125”.
All beta/gamma disk sources have an uncertainty of ± 20% of the labeled activity unless calibrated (± 5%) for an additional cost. Activities will not exceed the U.S. NRC Exempt Quantity limit.
| Nuclide | Minimum Activity | Maximum Activity |
| Barium 133 | 0.1 µCi (3.7 kBq) | 10 µCi (370 kBq) |
| Cadmium 109 | 0.1 µCi (3.7 kBq) | 10 µCi (370 kBq) |
| Cesium 137 | 0.05 µCi (1.85 kBq) | 10 µCi (370 kBq) |
| Cobalt 57 | 0.1 µCi (3.7 kBq) | 100 µCi (3700 kBq) |
| Cobalt 60 | 0.05 µCi (1.85 kBq) | 1 µCi (37 kBq) |
| Europium 152 | 0.1 µCi (3.7 kBq) | 1 µCi (37 kBq) |
| Manganese 54 | 0.1 µCi (3.7 kBq) | 10 µCi (370 kBq) |
| Sodium 22 | 0.1 µCi (3.7 kBq) | 10 µCi (370 kBq) |
| Strontium 90 | 0.05 µCi (1.85 kBq) | 0.1 µCi (3.7 kBq) |
| Thallium 204 | 0.1 µCi (3.7 kBq) | 10 µCi (370 kBq) |
| Zinc 65 | 0.1 µCi (3.7 kBq) | 10 µCi (370 kBq) |
RSS2 – GM RESOLVING TIME SOURCE SET
The RSS2 source set is used for determining the resolving time of GM counters. It consists of 3 half-disks: 2 contain Tl-204 and 1 is left blank (contains no material).
Each disk has an uncertainty of ± 20% of the labeled activity. Activities will not exceed the U.S. NRC Exempt Quantity limit.
| Item Number | Description |
| RSS2 | (2) Tl-204, 5 μCi (185 kBq), sealed half-disk sources |
| (1) Blank half-disk |
RSS3 – ALPHA/BETA/GAMMA, THREE SOURCE SET 
The RSS3 source set is designed for demonstrating the basic characteristics of radiation. It consists of 3 disk sources: 1 gamma emitter, 1 beta emitter, and 1 alpha emitter.
Each disk has an uncertainty of ± 20% of the labeled activity. Activities will not exceed the U.S. NRC Exempt Quantity limit.
| Item Number | Description |
| RSS3 | (1) Co-60, 1 μCi (37 kBq), sealed disk (1″ diameter) |
| (1) Sr-90, 0.1 μCi (3.7 kBq), sealed disk (1″ diameter) | |
| (1) Po-210, 0.1 μCi (3.7 kBq), unsealed disk (1″ diameter) |
RSS5 – ALPHA/BETA/GAMMA, FIVE SOURCE SET
The RSS5 source set is designed for demonstrating the basic characteristics of radiation. It consists of 5 disk sources: 2 gamma emitters, 2 beta emitters, and 1 alpha emitter.
Each disk has an uncertainty of ± 20% of the labeled activity. Activities will not exceed the U.S. NRC Exempt Quantity limit.
| Item Number | Description |
| RSS5 | (1) Co-60, 1 μCi (37 kBq), sealed disk (1″ diameter) |
| (1) Cs-137, 5 μCi (185 kBq), sealed disk (1″ diameter) | |
| (1) Tl-204, 1 μCi (37 kBq), sealed disk (1″ diameter) | |
| (1) Sr-90, 0.1 μCi (3.7 kBq), sealed disk (1″ diameter) | |
| (1) Po-210, 0.1 μCi (3.7 kBq), unsealed disk (1″ diameter) |
RSS8 – EIGHT GAMMA SOURCE SET
Designed for gamma spectroscopy, the RSS8 contains eight different gamma emitting isotopes covering the entire energy range from 32 keV to 1333 keV.
Each disk source has an uncertainty of ± 20% of the labeled activity unless calibrated (± 5%) for an additional cost. Activities will not exceed the U.S. NRC Exempt Quantity limit.
| Item Number | Description |
| RSS8 | (1) Ba-133, 1 μCi (37 kBq), sealed disk (1″ diameter) |
| (1) Cd-109, 1 μCi (37 kBq), sealed disk (1″ diameter) | |
| (1) Co-57, 1 μCi (37 kBq), sealed disk (1″ diameter) | |
| (1) Co-60, 1 μCi (37 kBq), sealed disk (1″ diameter) | |
| (1) Cs-137, 1 μCi (37 kBq), sealed disk (1″ diameter) | |
| (1) Mn-54, 1 μCi (37 kBq), sealed disk (1″ diameter) | |
| (1) Na-22, 1 μCi (37 kBq), sealed disk (1″ diameter) | |
| (1) Mixed “Unknown”, Cs-137, 0.5 μCi (18.5 kBq), Zn-65, 1 μCi (37 kBq), sealed disk (1″ diameter) |