Dosimetry Facilities

The Dosimetry Group is well equipped for routine radiation dosimetry using a variety of techniques and types of detectors, including radiophotoluminescence (RPL) detectors, thermoluminescence detectors (TLDs), fission track foils, and plastic nuclear track detectors (PNTD).

We are also expanding our research facilities for the investigation of luminescence materials and processes, with the acquisition of modern thermoluminescence (TL) and optically stimulated luminescence (OSL) readers (see below).

In addition, we have access to PSI’s Calibration Laboratory, where irradiation with calibrated gamma sources (Cs-137, Co-60), neutron sources (Cf-252, Am-Be) and x-rays are possible.

Dosimetry systems

FGD-660 RPL readers (Chiyoda Technol Co.)

Two modern automated RPL readers with capacity of up to 2000 glass detectors each provide efficient readout of the dosimeters used in the routine.<

Top

TASLImage Systems (Track Analysis Systems Ltd., Bristol, UK)

Two automated readers for poly allyl diglycol carbonate (PADC) detector are used for the routine neutron dosimetry service.

Top

Harshaw TLD readers

Two Harshaw TLD readers are used for the readout of individual TLDs for dosimetry of extremities (finger ring).

Top

ALNOR TL reader

The automated TL reader is used for the readout of Al2O3:C and LiF:Mg,Ti TLDs used in environmental dosimetry.

Top

FUNKOMAT reader

The FUNKOMAT reader is used for the readout fission fragment detectors used in environmental dosimetry.

Top

High-purity Germanium (HPGe) detector

A HPGe detector is used routinely as a whole body counter for incorporation measurements.

Top

NaI:Tl detectors for thyroid measurements

Two NaI:Tl detectors (Bicron 1XM.040/1.5B, 2.54 cm diameter, 1 mm thickness) and , Beryllium-window) and a NaI:Tl detector (Harshaw integral line 4S4/1.5G- X, 2.54 cm diameter, 2.54 cm thickness) are used for routine thyroid monitoring.

Top

Ancillary chemistry equipment for etching

The laboratory is also equipped for the chemical etching of the poly allyl diglycol carbonate (PADC) detectors used in the routine neutron dosimetry service and for research.

The laboratory is also equipped for the chemical etching of the fission fragments detectors used in the routine environmental dosimetry.

Top

Automated luminescence research readers

Lexsyg smart extended

Automated thermoluminescence (TL) and optically stimulated luminescence (OSL) reader with capability to handle up to 40 samples.

The following measurements are possible:
  • TL measurements up to 700 °C
  • OSL with blue, green or IR stimulation
  • LM-OSL
  • POSL
The reader is also equipped with:
  • 90Sr/90Y beta source for sample irradiation
  • 6 position filter wheel for automated detection window selection

Top

Risø TL/OSL reader

A Risø TL/OSL reader has been purchased and should be installed in 2019. The reader is capable of:
  • TL measurements up to 700 °C
  • OSL with blue, green and IR stimulation
  • LM-OSL
  • Time-Correlated Single Photon Counting (TCSPC) OSL measurements
  • TL and OSL spectroscopy measurements
  • Radioluminescence (RL) measurements at elevated temperatures
The reader is also equipped with:
  • 90Sr/90Y beta source for sample irradiation
  • 241Am for alpha irradiation (in vacuum)
  • Two filter wheels for automated detection window selection
  • Automated detector changer
  • High sensitivity emission spectrometer

Top

Ovens

Thermo Thermolyne Muffel furnace

Thermo Thermolyne Muffel furnace with a C1 controller (F48020-33-80) for heating profiles with up to 8 segments. Annealing up to 1200 °C is possible.

Top

PTW - TLDO

PTW – TLDO oven for automated annealing of LiF:Mg,Ti detectors. Annealing up to 400 °C is possible.

Top

WISAG KU 140/06/A

WISAG KU 140/06/A oven with a Eurotherm 3508 controller for heating profiles. Annealing up to 650 °C is possible.

Included:
  • Eurotherm 3216, maximum temperature limitation
  • Circulating air speed controller
  • Fresh air supply with blower

Top

Memmert ULE 400 oven

Memmert ULE 400 oven with forced air circulation Heat up to 220 °C is possible