Ionization Chamber
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Recent papers in Ionization Chamber
An accurate computation of the collection efficiency due to recombination has a capital importance in order to perform high-precision dose measurements with ionization chambers. The two-voltage method, developed to compute charge... more
The effects of varying the concentrations of cross-linker N, N′-methyelene-bis-acrylamide (BIS) from 2% to 4%, and 2-hydroxyethylacrylate (HEA) monomer from 2% to 4% at 5% gelatin on the dose response of BIS–HEA–gelatin (BHEAG) aqueous... more
At the Large Hadron Collider (LHC) a beam loss system will be installed for a continuous surveillance of particle losses. These beam particles deposit their energy in the super-conducting coils leading to temperature increase, possible... more
Verification of the performance accuracy of a real-time skin-dose tracking system for interventional fluoroscopic procedures. [Proceedings of SPIE 7961, 796127 (2011)]. Daniel R. Bednarek, Jeffery Barbarits, Vijay K. Rana, Srikanta P.... more
The American Association of Physicists in Medicine Task Group 43 reports, AAPM TG-43 and its update TG-43U1, provide an analytical model and a dosimetry protocol for brachytherapy dose calculations, as well as documentation and results... more
We present the results of precision measurements of dμ spin-flip rates in pure D 2, in pure HD gas, and in the non-equilibrium and equilibrium H 2+ D 2 gas mixtures. The experiments were performed at PSI in 1994-1996 using the high... more
A commercially-available radionuclide calibrator is used to maintain the unit of activity in the Slovak Institute of Metrology (SMU) and to check and verify activity meters in the field of nuclear medicine. The calibration of the... more
Synchrotron X-ray beams may now be focussed to <1 μm and devices with similar spatial precision are required to monitor the beam position or provide real-time information for position control. Over the X-ray energy range... more
Dosimetric data obtained from different measurement techniques of 10 MV small circular photon beams of 12.5, 20, 30, and 40 mm diameter were studied. The effects of lack of lateral electronic equilibrium and steep dose gradient were... more
A novel technique has been developed to build vessels for liquid xenon ionization detectors entirely out of an ultra-clean fluoropolymer. One such detector was operated inside a welded, He leak tight, all-fluoropolymer chamber. The... more
The gas-filled ionization chambers, irradiated with pulsed electrons or X-rays from a linear accelerator, have been found to show a transient electron current (TEC) after the applied voltage being cut off. This phenomenon has been... more
The effective neutron W value for tissue-equivalent gas in the energy region from 5 keV to 5.7 MeV has been calculated using W values for recoil particles (protons, alpha particles, oxygen, carbon and nitrogen ions), which are produced by... more
This work reports a practical method for the determination of the in vivo breast middle dose value, D(m) on the beam central axis, using a signal S(t), obtained by a small thimble ion chamber positioned at the center of the electronic... more
Muon catalyzed dd fusion in D2 and HD gases in the temperature range from 28 to 350 K was investigated in a series of experiments based on a time-projection ionization chamber operating with pure hydrogen. All main observables in this... more
Dose characteristics of a stereotactic radiotherapy unit based on a standard Varian Clinac 4/100 4 MV linear accelerator, in-house-built Lipowitz collimators and the SMART stereotactic radiotherapy treatment planning software have been... more
Total Skin Electron Beam (TSEB) irradiation is considered as the treatment of choice for cutaneous T-cell lymphoma internationally, for either curative purposes or palliative care. An attempt for the first application of this external... more
Antiprotons are interesting as a possible future modality in radiation therapy for the following reasons: When fast antiprotons penetrate matter, protons and antiprotons have near identical stopping powers and exhibit equal radiobiology... more
During the last several years, the measurements of neutron-induced fission cross-sections of actinides and stable isotopes have been performed at the GNEIS facility. At present moment, the new series of experiments for measurements of... more