Individual sources and sets of radioactive sources, each is mounted in a 2.5 cm diameter sealed plastic disk. All sources and isotopes on this page are USNRC License Exempt (US only). Outside the US, consult local laws and regulations. Local, national, and international regulations may restrict the purchase, storage, transport, use or disposal of radioactive sources. Please consult your local regulations to ensure your compliance before you purchase radioactive sources. PASCO advertised sources are direct shipped to customers from Spectrum Techniques. Please review their "Terms and Conditions" page before purchasing. 

*Note: "Non-Cancellable" and "Non-Returnable", including "End of Life" disposal.

50892
SN-8110
Radioactive Sources (set of 3)

Radioactive Sources (set of 3)    Get Quote

Contains three radioactive sources. See specs for individual sources for details.

Specifications:

  • Po-210: 0.1 µCi, 138 day half-life,α radiation
  • Sr90: 0.1 µCi 28.6 year half-life, βradiation
  • Co-60: 1 µCi, 5.27 year half-life, β,γradiation
50893
SN-7972A
Radioactive Sources (set of 5)

Radioactive Sources (set of 5)    Get Quote

Contains five radioactive sources.

Specifications:

  • Po-210: 0.1 µCi, 138 day half-life,α radiation
  • Sr90: 0.1 µCi 28.6 year half-life, βradiation
  • Ti-204: 0.1 µCi, 3.78 year half-life, βradiation
  • Co-60: 1 µCi, 5.27 year half-life, β,γradiation
  • Cs-137: 0.25 µCi, 30.2 years,β,γradiation
50900
SN-7949A
Gamma Sources (set of 8)

Gamma Sources (set of 8)    Get Quote

Set of eight gamma sources.

Specifications:

  • Co-60: 1 µCi, 5.27 year half-life,β,γ radiation
  • Na-22: 1 µCi, 2.60 year half-life,β+,γ radiation
  • Mn-54: 1 µCi, 3131 day half-life, γ radiation
  • CS-137: 0.25 µCi, 30.2 year half-life,β,γ radiation
  • Ba-133: 1 µCi, 10.5 year half-life, γ radiation
  • Cd-109: 1 µCi, 464 day half-life, γ radiation
  • Co-57: 1 µCi, 270 day half-life, γ radiation
  • "Unknown": mixture of Cs-137 and Zn-65 for student testing
50894
SN-9085
Radioactive Source (Po-210)

Radioactive Source (Po-210)    Get Quote

This radioactive source is mounted in a 2.5 cm diameter sealed plastic disk and requires no licensing.

Specifications:

  • Radioactive Activity: 0.1 µCi
  • Half-life: 138 days
  • Radiation: α
50895
SN-9796
Radioactive Source (Sr-90)

Radioactive Source (Sr-90)    Get Quote

This radioactive source is mounted in a 2.5 cm diameter sealed plastic disk and requires no licensing.

Specifications:

  • Radioactive Activity: 0.1 µCi
  • Half-life: 28.6 years
  • Radiation: β
50896
SN-9797
Radioactive Source (Tl-204)

Radioactive Source (Tl-204)    Get Quote

This radioactive source is mounted in a 2.5 cm diameter sealed plastic disk and requires no licensing.

Specifications:

  • Radioactive Activity: 1 µCi
  • Half-life: 3.78 years
  • Radiation: β
50897
SN-9794
Radioactive Source (Co-60)

Radioactive Source (Co-60)    Get Quote

This radioactive source is mounted in a 2.5 cm diameter sealed plastic disk and requires no licensing.

Specifications:

  • Radioactive Activity: 1 µCi
  • Half-life: 5.27 years
  • Radiation: β,γ
50898
SN-9795
Radioactive Source (Cs-137)

Radioactive Source (Cs-137)    Get Quote

This radioactive source is mounted in a 2.5 cm diameter sealed plastic disk and requires no licensing.

Specifications:

  • Radioactive Activity: 5µCi
  • Half-life: 30.2 years
  • Radiation: β,γ
477695
SN-7942
Radioactive Source (Cs-137)

Radioactive Source (Cs-137)    Get Quote

This source is mounted in a 2.5 cm diameter sealed plastic disk and requires no licensing.

Specifications:

  • Radioactive Activity: 0.25 µCi
  • Half-life: 30.2 years
  • Radiation: β, γ
477686
SN-7941
Radioactive Source (Tl-204)

Radioactive Source (Tl-204)    Get Quote

This source is mounted in 2.5 cm diameter sealed plastic disks and requires no license.

Specifications:

  • Radioactive Activity: 0.25 µCi
  • Half-life: 3.78 years
  • Radiation: β