 The radiation hardness of diode array devices based on silicon on insulator technology and bulk technology was investigated. The devices were exposed to 24 GeV/c protons (at CERN) up to a fluence of 4.1 10 p/cm. Charge collection following irradiation indicated a significant reduction in minority carrier lifetime. The damage constant was calculated using alpha particle spectroscopy methods. T...

The variance-covariance method is employed at low doses and in radiation fields of low dose rates from an 241Am (4 nGy/s) and a 90Sr (300 nGy/s) source. The preliminary applications and results illustrate some of the potential of the method, and show that the dose average of lineal energy or energy imparted can be determined over a wide range of doses and dose rates. The dose averages obtained ...

Neurospheres are three dimensional (3D) cell clusters consisting of neural progenitor cells (NPCs). NPCs provide the cellular basis for the developing brain and persist in the hippocampus up to old age. there, they are responsible for adult learning and memory. Safety and efficacy testing with 3D neurospheres by employing high content image analyses (HCA) require advanced scanning and evaluatio...

Microdosimetry study has been carried out at the education and research mini-reactor of Kinki University (UTR-KINKI) using a tissue equivalent gas proportional counter (TEPC). The microdosimetric single event spectra for 0.5, 1, 2, 3 and 5 microm site sizes were obtained in the lineal energy range from 1 to 1000 keV/microm. Neutron and gamma-ray fractional doses were estimated from the single e...

The paper presents a computational stochastic model of virtual cells irradiation, based on Quasi-Markov Chain Monte Carlo method and using biophysical input. The model is based on a stochastic tree of probabilities for each cell of the entire colony. Biophysics of the cells is described by probabilities and probability distributions provided as the input. The adaptation of nucleation and catast...

Semiconductor radiation detectors play an important role in radiation instrumentation. They have many advantages due to their small size, outstanding energy resolution in nuclear spectroscopy, easy pixilation for high spatial resolution and ability of integration with readout electronics. Advancement in microelectronic industry made silicon one of the most popular material for radiation detecto...

Electromagnetic fields from low frequency to millimeter wave are presenting lots of interests for biomedical applications. Among them is emerging the possibility to non-invasively investigate the living at various levels from tissue/organ to cellular, with the objective to early diagnose diseases and improve the efficiency of prognostic and therapies. This workshop will consequently address the...

The recent Dose Response journal article "Protective Bystander Effects Simulated with the State-Vector Model" (Schollnberger and Eckl 2007) identified the suppressive (below natural occurring, zero primer dose, spontaneous level) dose response for HeLa x skin exposure to (137)Cs gamma rays (Redpath et al 2001) as a protective Bystander Effect (BE) behavior. I had previously analyzed the Redpath...