Ion-mobility spectrometry (IMS) in conjunction with radioactive ionization sources has been employed for field-portable applications for the past two decades. Recently, electrospray ionization (ESI) sources have been shown as a viable ionization source with IMS instruments, enabling the analysis of many nonvolatile compounds. Introduction of a liquid-sheath-flow ESI source enabled the direct an...

The Radionuclide Metrology Laboratory (RML) from IFIN-HH organized proficiency tests regarding the measurement of the radioactive content of the food products, water equivalent, with the involved laboratories. RML prepared 14 solid volume sources, of cylindrical shape, containing a mixture of Cs-134 and Cs-137 radionuclides, uniformly distributed in a water equivalent matrix. 13 participants fr...

Photon ambient dose equivalent buildup factors were calculated for point and plaque isotropic cobalt-60 and cesium-137 radioactive sources irradiating a finite slab shield materials of ordinary concrete, barite concrete, lead, lead glass and water using MCNP5 code. Studied shield thickness ranged from 1 to 15 mean free paths (mfp). A variance reduction technique available in the code was used t...

It is a common practice to check the performance of a TLD reader by inserting a light source composed of a phosphor mixed with a radioactive material, e.g., 14C . The response to the light source is used as a measure of a) the calibration or long-term stability of the reader and b) the ability of the reader to reproduce a constant signal. Usually the laboratory which measures a wide range of do...

After an explosion of a radiological dispersal device, decision-makers need to implement countermeasures as soon as possible to minimise the radiation-induced risks to the population. In this work, the authors present a tool, which can help providing information about the approximate size of source term and radioactive contamination based on a Gaussian Plume model with the use of available meas...

As part of a study of protein and peptide metabolism lysine was synthesized with Cl4 in the e position and resolved into the L and D isomers. 10 mg. of labeled lysine dihydrochloride (either Lor D-) and 0.66 gm. (wet weight) of guinea pig liver homogenate were added to a reaction mixture containing 1.3 per cent of an amino acid mixture corresponding to the composition of casein except for lysin...

Assay of the radioactive content of waste drums is important for inventory and waste disposal purposes. The sampling of the drum content is a difficult, time and labor consuming procedure, involving special radiation protection considerations. On the other hand the characterization of waste drums containing radioactivity by measuring the drum as a whole (without opening) offers overall simplici...

In a previous publication (l), data were reported concerning n-mannose and n-ribose isolated from Torula utilis yeast which had been grown on n-glucose-l-C’4 as the sole source of carbon. It was found that water extraction of the lyophilized yeast yielded a mannan that was completely devoid of radioactivity. Further, the D-ribose obtained from the purine ribosides of the nucleic acid fraction s...

Significant environmental contamination by radioactive materials has occurred in some parts of the world due to industrial and military activities, such as nuclear weapon testing, uranium mining and nuclear and radiological accidents. The most well-known sites where large scale remediation has been implemented include: the nuclear test sites in the Bikini and Enewetak Atolls (USA) and Maralinga...

The Holifield Radioactive Ion Beam Facility (HFUBF) is a first generation national user facility for nuclear physics and nuclear astrophysics research with radioactive ion beams (RIBs). The reconfiguration, construction, and equipment-commissioning phases have been completed and the beam development program is in progress. In this article, descriptions of the facility and newly implemented expe...