High-precision natural dose rate estimates through beta counting

Beta - Integers as Natural Counting Systems

Recently, discrete sets of numbers, the-integers ZZ , have been proposed as numbering tools in quasicrystalline studies. Indeed, there exists a unique numeration system based on the irrational > 1 in which the-integers are all real numbers with no fractional part. These-integers appear as being quite appropriate to describing some quasilattices relevant to quasicrystallography when precisely is...

Precision of the Accidentals Rate in Neutron Coincidence Counting

The quantification of Pu present, for example, as process hold-up in glove boxes or in waste containers may be accomplished by passive neutron coincidence counting (PNCC) to determine the Pu-240 effective mass which may then be related to the total Pu mass or Pu-239 mass through the isotopic composition. When multiplication can reasonably be taken as slight, assay results are normally based on ...

High Precision Neutron Beta-Decay Measurements

Quality assurance prusedore in high dose rate bracythrapy

Introduction: Quality assurance is essential for obtaining the best achievable tumor control, avoiding unnecessary side effects, accuracy and safety during performing High Dose Rate (HDR) Brachytherapy (BT). Quality assurance is extremely important because HDR BT procedures are performed quickly, with high doses given in a short time period, with little opportunity for correcti...

Fractionated High-Dose-Rate Brachytherapy

Purpose: A growing body of data suggests that local control in nasopharyngeal cancer (NPC) is related to the radiation dose administered. We conducted a singleinstitution study of high-dose radiotherapy (RT), which incorporated high-dose-rate (HDR) brachytherapy (BT). These results were analyzed together with data obtained from controls who did not receive BT. Patients and Methods: The BT group...