RSS8 – Gamma Set

A complete eight‑disc set spanning ~32 to 1333 keV for gamma spectroscopy labs and instrument checks. The standard kit includes Ba‑133, Cd‑109, Co‑57, Co‑60, Cs‑137, Eu‑152, Na‑22 and a mixed “unknown” (Cs‑137/Zn‑65) to challenge identification exercises. Standard activity tolerance is ±20%, with an optional ±5% secondary calibration for gamma sources.

Key features

• Wide energy coverage: multiple gamma peaks across approximately 32–1333 keV to calibrate and verify spectroscopy systems.
• Eight curated isotopes: includes a mixed Cs‑137/Zn‑65 disc for “unknown” identification practice.
• Clear tolerances & calibration: supplied activities typically within ±20%; optional secondary calibration available to ±5% (gamma only).
• Durable disc format: sealed plastic discs; 25 mm (1″) is standard with 50 mm (2″) available to order; typical active deposit ~2–3 mm at centre.
• Ready for education & QA: ideal for energy calibration, peak identification, shielding and inverse‑square demonstrations.

Technical specifications

• Energy range (approx.): 32–1333 keV.
• Standard configuration (RSS8): Ba‑133 1 µCi (≈ 37 kBq); Cd‑109 1 µCi (≈ 37 kBq); Co‑57 1 µCi (≈ 37 kBq); Co‑60 1 µCi (≈ 37 kBq); Cs‑137 1 µCi (≈ 37 kBq); Eu‑152 0.5 µCi (≈ 18.5 kBq); Na‑22 1 µCi (≈ 37 kBq); Mixed “Unknown”: Cs‑137 0.5 µCi (≈ 18.5 kBq) & Zn‑65 1 µCi (≈ 37 kBq).
• EU configuration (RSS8EU): Ba‑133 1 µCi; Cd‑109 1 µCi; Co‑57 1 µCi; Co‑60 1 µCi; Cs‑137 0.25 µCi (≈ 9.25 kBq); Eu‑152 0.5 µCi; Na‑22 1 µCi; Zn‑65 1 µCi.
• UN configuration (RSS8UN): Ba‑133 1 µCi; Cd‑109 1 µCi; Co‑57 1 µCi; Co‑60 1 µCi; Cs‑137 0.1 µCi (≈ 3.7 kBq); Eu‑152 0.5 µCi; Na‑22 1 µCi; Zn‑65 1 µCi.
• Activity tolerance: ±20% of labelled activity (typical); optional secondary calibration to ±5% (gamma only).
• Disc format & size: sealed plastic discs; 3.2 mm × 25.4 mm (1″) standard; 3.2 mm × 50.8 mm (2″) available. Typical active deposit ~2–3 mm at centre.
• Regulatory note (manufacturer): activities supplied do not exceed the U.S. NRC Exempt Quantity limit.

Applications

• Teaching & training: energy calibration, peak identification and attenuation demonstrations in undergraduate and vocational labs.
• Radiation protection & QA: quick checks of spectrometers and multichannel analyser setups.
• Exercises & drills: “unknown” identification using the mixed Cs‑137/Zn‑65 disc.

Compliance & Australian context

“Exempt Quantity” is a U.S. supply classification. In Australia, ordering, possession and use may require licences/approvals depending on isotope and state/territory regulator. J3Seven can assist with documentation and local guidance.

What’s included

• Eight sealed disc sources in the selected configuration (see above)
• Manufacturer documentation; optional secondary calibration certificate for gamma discs when selected

Options & related products

• Gamma disc secondary calibration: optional ±5% activity tolerance for tighter confirmation (beta sources not available for calibration).
• Related products: RSS3 (three‑source α/β/γ), RSS5 (five‑source α/β/γ), and individual Beta/Gamma Disc Sources.

Maintenance & support

Store and handle in line with your radiation management plan. J3Seven provides selection advice, compliance documentation and after‑sales support. Australia‑wide delivery.

FAQs

Which isotopes are included?
Standard RSS8 includes Ba‑133, Cd‑109, Co‑57, Co‑60, Cs‑137, Eu‑152, Na‑22 and a mixed Cs‑137/Zn‑65 “unknown”. EU/UN options reduce the Cs‑137 activity and provide a separate Zn‑65 disc.

What energy range does the set cover?
Approximately 32 to 1333 keV, suitable for energy calibration and peak identification exercises.

Can I get calibration certificates?
Yes—secondary calibration is available for gamma discs to ±5%. Beta sources are not available for calibration.

What disc sizes are available?
25 mm discs are standard; 50 mm are available on request. The typical active deposit is ~2–3 mm at the centre of each disc.

Do I need a licence in Australia?
Requirements vary by state/territory and isotope. J3Seven can assist with the typical paperwork and provide supporting documentation.