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Ionizing Radiation

Division 6

Almost everything dealt with at Division 6 centres on the nucleus, for here radioactivity, dosimetry and metrology of alpha, beta, gamma, X and neutron radiation are concerned - from radiation therapy in medicine to the measurement of radioactivity in the environment.

Tasks

The Division is concerned with the metrology of ionizing radiation. Important tasks cover measuring techniques for the detection of ionizing radiation, dosimetry for radiotherapy, radiodiagnostics and radiation protection, radiation measurements in the environment, activity measurements and the determination of atomic and nuclear data. The units of activity, fluence rate, air kerma, absorbed dose and dose equivalent are realized and disseminated via calibrations. The Division thus ensures the uniformity of measurements in the field of ionizing radiation.

Legal tasks are based on the Units and Time Act, the Verification Act, the Medical Products Act, the Radiology and the Radiation Protection Ordinance and the Radiation Protection Preventive Act. Activity standards for about 50 radionuclides are produced and made available. The Division performs type testing of X-ray equipment, X-ray tube assemblies, parasitic X-ray emitters, area and personal dosemeters, and dosemeters for radiodiagnostics. In addition, the Division deals with fundamental research work in the fields of radioactivity, dosimetry and metrology of alpha, beta, gamma, X-ray and neutron radiation.

6 Abteilungsbericht aus dem Jahresbericht 2019

3D Darstellung der Ortsdosisleisung eines technischen Röntgenstrahlers gemessen am Röntgenstrahlermessplatz der PTB.

Der Initiates file downloadAbteilungsbericht gibt einen Überblick über die wichtigsten Nachrichten und Ereignisse der Abteilung „Ionisierende Strahlung“ des letzten Jahres und ergänzt somit den Opens internal link in current windowJahresbericht-2019 der PTB.

News

In einer gemeinsamen Arbeit mit dem Laboratoire National Henri Becquerel in Frankreich wurde das Beta‑Spektrum von Samarium‑151 genau untersucht. Messdaten eines metallisch‑magnetischen Kalorimeters wurden genutzt, um die Beta‑Endpunktsenergie mit bisher unerreichter Genauigkeit zu bestimmen. Außerdem ist es gelungen die Zerfallswahrscheinlichkeiten zweier miteinander konkurrierender Beta‑Zweige...

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Zirconium‑89 is a radionuclide that can be used for diagnostic applications in medicine. At PTB, activity determinations have now been carried out by means of liquid scintillation counting in order to enable reliable calibrations of zirconium‑89 solutions in the future. In addition, ionization chamber measurements have been used to very accurately determine the half‑life of zirconium‑89.

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Silizium-32 hervorgehoben auf Nuklidkarte

Gemeinsam mit dem Paul‑Scherrer‑Institut und weiteren Partnern bestimmt die PTB Halbwertszeiten sehr langlebiger Radionuklide. Aktuelle Arbeiten umfassen Molybdän‑93, Mangan‑53, Silizium‑32, Kalium‑40, Terbium‑157 und Lanthan‑137.

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