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Activities & equipment
IRB: Bijenička 54, HR-10000 Zagreb. tel: +385 (0)1 4561-111, fax: 4680-084, PR: 4571-269, mail: info@irb.hr
... Laboratories Laboratory for Measurement of Low-Level Activities Activities & equipment
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Activities of the Laboratory for Measurements of Low-level Radioactivity

Members of the Laboratory develop measurement techniques of cosmogenic isotopes (14C, 3H), and application of isotopes in multidisciplinary scientific research in archaeology, geology, hydrogeology, geochemistry, paleoclimatology and ecology. Significant part of investigation is performed in karst environment using isotopic and geochemical analyses. Also, they conduct research in interactions between low-energetic radiation and gases. The laboratory is the only one of its kind in Croatia, as well as in the wider region. The continuous work on modernizing of measurement technique and equipment by introduction of graphite sample preparation method for measurement of 14C by accelerator mass spectrometry (AMS) will keep the Laboratory the leading position in measurements and application of isotopes with the aim to form a regional centre of excellence. Besides the regular funding by the Ministry of Science, Laboratory has an excellent track record of participation in international projects funded by European Commission (FP5, FP6, and FP7) and IAEA and has a significant cooperation with numerous cultural institutions, local authorities and industry.

ISOTOPE MEASUREMENTS:

  Radiocarbon dating of archaeological, geological and paleontological samples

  Tritium activity measurements of natural waters (precipitation, surface and groundwater)

  Use of stable (2H, 13C, 18O) and natural radioactive isotopes (3H, 14C) in hydrogeological studies (protection of water resources, especially in karst areas)

  Use of isotopes in paleoclimatological and ecological studies

  Study of physico-chemical conditions necessary for formation of secondary carbonates (tufa, speleothems) in karst regions

 

OTHER ACTIVITIES:

  Study of the energy degradation (energetic, subexcitation and thermalized electrons)in pure gases and gas mixtures

Devices

   System for electrolytic enrichment of water with tritium for LSC measurements

  Vacuum line for chemical preparation of benzene and for direct absorption of CO2 for 14C measurement by LSC

   Vacuum line for graphite preparation for measurement of   14C by accelerator mass spectroscopy (AMS) technique

  Quantulus 1220 ultra low-level liquid scintillation counter (LSC) for 14C and 3H measurements

  Other: Centrifuge Heraeus, Spectrophotometer Cecil CE2021, Binocular zoom stereo microscope XTL-3400 with camera, Ultrasonic bath, Portable pH-meter, conductometer and oximeter, Freeze Dryer Labconco, Rotovapor Ika RV 10, and device for production of ultrapure water Millipore Simplicity UV.

 


System for combustion of organic samples - 
obtaining of CO2 for subsequent preparation of benzene


Vacuum line for direct apsorption of CO2
for 14C activity measurements by LSC


Vacuum line for benzene preparation
for 14C activity measurements by LSC

 
System for electrolytic enrichment of water with tritium
for 3H activity measurement by LSC


Liquid scintillation counter (LSC)
Quantulus 1220 (Wallac Oy, Finland)

 
Vacuum line for preparation of graphite
for 14C AMS measurement technique