Regulated research procurement

Radioactive isotopes and sealed sources for research institutions.

Search a nuclide, instrument or application. We find the supplier path and run the order to receipt.

  • No license file needed to ask
  • Your RSO reviews the exact item
  • PO-ready quotes
Demo
1002005001k661.7keV
137Cs
Nuclide
Cesium-137
Half-life
30.08 y
Emission
γ 662 keV
Status
Feasibility review
Illustrative detector response. Reference line energies. Not a stock list.

What we handle today

Pick a nuclide. Start a request.

Examples researchers ask about, not stock. Every request gets a review.

Sealed gamma reference sourcesDetector checks and calibrationFeasibility review
Sealed beta sourcesBeta detector checksFeasibility review
Sealed alpha sourcesDetector checksFeasibility review
Neutron sourcesNeutron measurementExpert review only
Unsealed tracersLabeling and tracingFeasibility review
RadiopharmaceuticalsClinical imaging and therapyNot offered

Buying an instrument that carries a source? See how instrument orders work

Isotope guides

One page for each isotope.

Research uses, source forms, licensing and decay data, with references.

Sealed gamma reference sources

  • Cobalt-57 for research

    Co-57 · Half-life 271.7 days

    The source behind iron Mössbauer spectroscopy, and a 122 keV standard for detectors and cameras.

  • Cobalt-60 for research

    Co-60 · Half-life 5.27 years

    Two gamma rays in cascade, at 1173 and 1332 keV: a standard for high-energy calibration and coincidence work.

  • Barium-133 for research

    Ba-133 · Half-life 10.55 years

    Gamma lines from 81 to 384 keV and cesium X-rays near 31 keV: a standard for low- and mid-energy calibration.

  • Cesium-137 for research

    Cs-137 · Half-life 30.08 years

    One gamma line at 662 keV and a 30-year half-life: a long-lived reference for detector and calibrator checks.

  • Europium-152 for research

    Eu-152 · Half-life 13.52 years

    Gamma lines from 122 to 1408 keV in one source: a standard for calibrating germanium detectors across their range.

Sealed beta sources

  • Strontium-90 for research

    Sr-90 · Half-life 28.91 years

    A long-lived beta source: Sr-90 and its yttrium-90 daughter emit betas up to 2.28 MeV.

Sealed alpha sources

  • Americium-241 for research

    Am-241 · Half-life 432.6 years

    Alpha particles near 5.49 MeV and a 59.5 keV gamma ray, from one long-lived source.

Unsealed tracers

  • Tritium (H-3) for research

    H-3 · Half-life 12.32 years

    A low-energy beta label that leaves a molecule almost unchanged, for binding, cell and metabolism studies.

  • Carbon-14 for research

    C-14 · Half-life 5,700 years

    The label that sits in a molecule's carbon backbone, for following carbon through cells, animals, plants and soil.

  • Phosphorus-32 for research

    P-32 · Half-life 14.27 days

    An energetic beta label for DNA and RNA probes, kinase assays and gel shift experiments.

  • Sulfur-35 for research

    S-35 · Half-life 87.37 days

    The label for newly made proteins, G protein activation and sharp autoradiographs.

  • Iodine-125 for research

    I-125 · Half-life 59.41 days

    A high specific activity label for proteins, peptides and receptor ligands, counted in a gamma counter.

Start a request

Three steps. Two minutes.

No account. A scientist reads every request and replies with the next step.

  1. 01Need
  2. 02Details
  3. 03Contact
Where are you starting?

You get Feasibility reply and a candidate supplier path

How an order moves

One case. Every handoff named.

  1. ResearcherDescribes the need
  2. ManufacturerConfirms the source
  3. Your RSOReviews this item
  4. PurchasingIssues the PO
  5. Shipper, carrier, brokerDeliver per plan
  6. Your RSOConfirms receipt

ConductScience runs the case at every step

  • Your RSO decides eligibility, item by item.
  • The shipper signs its own shipping declaration.
  • We keep one case, from inquiry to receipt.

Radioactive material is supplied only where the receiving institution and proposed order meet applicable requirements. Your radiation safety office reviews its authorization to receive and possess the specified material.

Read the ordering guide: every role, document and release check

Your account

Everyone sees their own next step.

Researcher, RSO and purchasing share one case. License files stay with the people who need them.

Request 0000Sealed source for detector calibrationRSO review pending
  1. Inquiry
  2. Specification
  3. RSO review
  4. Quote
  5. PO
  6. In transit
  7. Receipt
  • RSOReview proposed source for your facilityWaiting on you
  • PurchasingReview quote once issuedNot yet
  • ResearcherConfirm the scientific configurationDone
Example layout. Placeholder values.

Questions, answered

Before you ask

Do I need our radioactive materials license just to request a quote?

No. An initial inquiry does not require it. Your radiation safety officer is invited to review the exact proposed item after we find a viable supplier path.

Can my RSO review the exact proposed source?

Yes. The RSO sees the manufacturer-confirmed nuclide, form, activity with reference date, source model and receiving site before providing anything.

Can you source my isotope or replacement source?

Requests are reviewed one at a time for supplier and recipient fit. This page marks which categories are active today and which need a feasibility review.

Who ships, imports and receives the material?

Each party is named in the order documents for your specific order: shipper, carrier, customs broker, importer and receiving contact.

Is a research instrument import automatically duty-free?

No. Your institution and its customs broker decide whether any duty treatment applies. We do not promise a tariff outcome.

Can our purchasing office use a purchase order?

Yes, for eligible accepted orders. The quote lists the line items, assumptions, seller and validity your purchasing team needs.

Have a quote, a specification or an isotope in mind?

Start there. Your RSO and supplier documents come after review.

Start a request