III. 1. NUCLEAR FISSION REACTIONS ............................................................................................. 7 III. 2. NUCLEAR REACTORS ............................................................................................................. 7 III. 3. SPALLATION SOURCES ..........................................................................................................

Dose to the total body from induced radiation resulting from primary exposure to radiotherapeutic beams is not detailed in routine treatment planning though this information is potentially important for better estimates of health risks including secondary cancers. This information can also allow better management of patient treatment logistics, suggesting better timing, sequencing, and conduct ...

-An absolute measurement of the 235U fission cross section has been carried out using a S4Na-Be photoneutron source with median neutron energy of 964 keV. A symmetric two-foil experiment was set up to measure the fission rate in a low-albedo laboratory, and variations in the sourceto-foil spacing used to determine the room background. Fission fragments passing through a limited solid angle aper...

Photoneutron reactions on 208 Pb in the Giant Dipole Resonance (GDR) energy range have been investigated at γ-ray beam line of NewSUBARU synchrotron radiation facility Japan. Making use quasi-monochromatic laser Compton scattering (LCS) beams and a novel flat-efficiency neutron detection system along with associated neutron-multiplicity sorting method, total partial (γ,xn) photoneutron cross se...

Neutron detection time distribution is an important factor for the dead-time correction for moderator type neutron detectors used in pulsed radiation fields. Measurements of the neutron detection time distributions of multisphere LiI detectors (2Ó, 3Ó, 5Ó, 8Ó, 10Ó and 12Ó in diameter) and AB remmeter were made inside a ANL 20-MeV electron Linac room. Calculations of the neutron detection time d...

Recent shortages of molybdenum-99 ((99)Mo) have led to an examination of alternate production methods that could contribute to a more robust supply. An electron accelerator and the photoneutron reaction were used to produce (99)Mo from which technetium-99m ((99m)Tc) is extracted. SPECT images of rat anatomy obtained using the accelerator-produced (99m)Tc with those obtained using (99m)Tc from a...

High-energy X-rays offer several advantages over lower energy photons including: lower skin dose, higher depth dose, smaller scattered dose to tissues outside the target volume and less rounded isodose curves. These advantages in physical dose distributions have led to significant improvements in clinical radiotherapy, and high energy linear accelerators are now a standard fixture of radiothera...

Introduction: One of scientific concern is increasing of unwanted neutron dose to the patient, in head and neck radiation therapy due to the presence of some isotopes in dental restorations and head of medical linac. The aim of this study is to measure the equivalent dose of thermal and fast neutron due to head of Siemens Primus Linac and a healthy tooth, Amalgam, Ni-Cr alloy a...

The Pacemaker Clinic at Shahid Rajai Cardiovascular Research Center first started operating in August 1992. In its first year of operation, 294 permanent pacemaker patients were studied, allowing an appraisal to be carried out of the clinic's effectiveness in diagnosing and treating early complications. In the final analysis, pacemaker complications were observed in 68 (23%) patients, of wh...