Phantom experiments to evaluate thermal neutron flux distribution were performed using the Scintillator with Optical Fiber (SOF) detector, which was developed as a thermal neutron monitor during boron neutron capture therapy (BNCT) irradiation. Compared with the gold wire activation method and Monte Carlo N-particle (MCNP) calculations, it was confirmed that the SOF detector is capable of measu...

We report the detection of the double neutron star binary (DNSB) B1534+12 (= J1537+1155) with the Chandra X-ray Observatory. This DNSB (Porb = 10.1 hr) consists of the millisecond (recycled) pulsar J1537+1155A (PA = 37.9 ms) and a neutron star not detected in the radio. After the remarkable double pulsar binary J0737−3039, it is the only other DNSB detected in X-rays. We measured the flux of (2...

(3) Fast neutron radiotherapy for inoperable salivary gland tumors: Is it the treatment of choice? George Laramore, PhD MD 1987 Radiation Oncology Biologic Physics CONCLUSION: “I believe that one can indeed conclude that fast neutron radiotherapy is the present “treatment of choice” for inoperable malignant tumors of the salivary glands.” STATISTICAL CONCLUSIONS: “From multiple studies, 188 pat...

Introduction: Proton radiotherapy is the one of advanced teletherapy methods. The protons deposit their maximum energy in a position called Bragg peak. Therefore, for treatment of cancer, the tumor should be placed at the Bragg peak or SOBP. The scattered photons and neutrons is a challenge in proton radiotherapy. The aim of this study is calculation of absorbed dose from scatt...

Recent discovery of the afterglow emission from short gamma-ray bursts suggests that binary neutron star or black hole-neutron star binary mergers are the likely progenitors of these short bursts. The accretion of neutron star material and its subsequent ejection by the central engine implies a neutron-rich outflow. We consider here a neutron-rich relativistic jet model of short bursts, and inv...

Introduction: The heavyweight concretes have been widely used for constructing medical or industrial radiation facilities with photon sources. Materials and Methods: In this study, heavy concretes containing galena (PbS) and several borated minerals are proposed as suitable materials against photons. The shielding properties of 21 galena concretes containing seven borated minerals with three m...

Particle accelerators which have initially been developed as a tool for basic research now have well known applications in industry, applied sciences and medical. There are more than ten thousand of accelerators running all over the world. Out of which almost fifty percent are devoted to the medical applications. The main areas of use are radioisotopes production, radiography and conventional r...

PURPOSE This study was undertaken to explore the effects of the jaws and the MLC openings on the neutron dose equivalent (DE) at the maze door and neutron flux at the patient plane. METHODS The neutron dose equivalent was measured at the maze entrance door of a 15 MV therapy linear accelerator room. All measurements were performed using various field sizes up to 40 cm × 40 cm. Activation dete...