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Sealed Radioactive Source, Strontium
Sealed Radioactive Source, Strontium (Product Code: SLE/PHY/290) is a 5 µCi (185 kBq) strontium-90 teaching source used for beta-particle experiments in school and college physics laboratories. Its strontium-90 sits in equilibrium with the daughter nuclide yttrium-90 inside a silver disc that lets most of the beta radiation escape, and the mount is colour-coded yellow. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, as part of a radiation experiment kit for institutions.
Specifications
| Parameter | Detail |
|---|---|
| Isotope | Strontium-90 in equilibrium with its daughter nuclide yttrium-90 |
| Activity | 5 µCi (185 kBq) |
| Emission | Beta |
| Half-life | 28 years (strontium-90); 64 hours (yttrium-90) |
| Active element | Incorporated in a silver disc that allows the major proportion of the beta radiation to escape; active material enclosed in metal foil |
| Mount | Cylindrical mount with a 4 mm diameter stem |
| Window protection | Wire gauze cap over the open window |
| Identification | Nature and strength engraved on the mount; colour code yellow |
| Storage | Small lead castle in a labelled MDF box, 100 x 75 x 65 mm high |
| Documentation | Data sheet enclosed with each source |
| Product code | SLE/PHY/290 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is the Strontium-90 Source Used For?
The strontium source is the standard way to show how beta particles behave. Placed in front of a GM tube, it gives a count that paper barely changes but that falls steeply as aluminium sheets of increasing thickness are added, so students can plot absorption curves and estimate the range of the particles. Holding a strong magnet beside the beam bends the particles and moves the count, which demonstrates that beta radiation is charged.
The yttrium-90 daughter has a half-life of only 64 hours, so it stays in equilibrium with the strontium and the source decays at the 28-year rate of strontium-90. In practice the count rate changes very little over a school career, which suits long-term comparison of results. Use tongs, keep the open window facing away from the body, subtract the background count before every reading, and return the source to its lead castle as soon as the measurement is complete.
What to Specify When Ordering
- How many strontium-90 sources you need, and whether cobalt or americium sources are required too.
- Details of any authorisation your institution holds for keeping sealed sources.
- Detection equipment to include: GM tube holder, scaler timer or counter.
- Delivery address and country for the shipment.
Supplier
Jain Scientific Equipments Private Limited, which trades as ScienceLab, supplies the strontium-90 source from Ambala, Haryana, India to schools, colleges and research institutes. The company sources it for teaching use and checks the paperwork and transport conditions for each destination before confirming an order. Details of the company appear on our profile page.
Related Physics Lab Equipment
Buyers of the Sealed Radioactive Source, Strontium often add these items:
- Sealed Radioactive Source, Cobalt — gamma source for comparing penetrating power.
- Sealed Radioactive Source, Americium — alpha source for the short-range end of the comparison.
- Geiger Muller Tube Holder — keeps the detector aligned with the source window.
- Scaler Timer — counts pulses for each absorber thickness.
- Steel Horseshoe Magnet — deflects the beta particles in the magnetic deflection demonstration.
Find detectors and more apparatus in Physics Lab Equipment.
Frequently Asked Questions
What type of radiation comes from the Sealed Radioactive Source, Strontium?
The Sealed Radioactive Source, Strontium emits beta particles. Its strontium-90 and yttrium-90 are incorporated in a silver disc that allows the major proportion of the beta radiation to escape, which makes it the usual choice for beta absorption and deflection practicals.
How long does the Sealed Radioactive Source, Strontium last?
The Sealed Radioactive Source, Strontium decays with the 28-year half-life of strontium-90, while its yttrium-90 daughter has a 64-hour half-life and stays in equilibrium. The count rate therefore falls only slowly over years of classroom use.
What is the activity of the Sealed Radioactive Source, Strontium?
The Sealed Radioactive Source, Strontium contains 5 µCi (185 kBq) of strontium-90 in equilibrium with yttrium-90. The nature and strength are engraved on the mount, which is colour-coded yellow, and a data sheet comes with each source.
How is the Sealed Radioactive Source, Strontium stored?
The Sealed Radioactive Source, Strontium is supplied in a small lead castle inside a labelled MDF box, 100 x 75 x 65 mm high. Keep the box in a locked, marked store away from students, and log each time the source is taken out.
Do regulations apply to buying the Sealed Radioactive Source, Strontium?
Yes, sealed sources such as the Sealed Radioactive Source, Strontium are regulated in most countries. Confirm with your national radiation regulatory authority what your institution must hold, then send those details with your enquiry through the contact page.
Who supplies the Sealed Radioactive Source, Strontium?
The Sealed Radioactive Source, Strontium is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India. We supply institutions in India and international markets and can combine the source with GM tube holders and counters in one quotation.
Request a Quote
For a quotation on the Sealed Radioactive Source, Strontium, write to us via the contact page or add it to the enquiry cart. Mention the quantity, destination country and any detection equipment you need.
Last updated: 24 September 2026
