Calculation of energy deposition distributions for simple geometries

When high-energy charged particles pass through a thin detector, the ionization energy loss in that detector is subject to fluctuations or straggling which must be considered in interpreting the data. Under many conditions, which depend upon the charge and energy of the incident particle and the detector geometry, the ionization energy lost by the particle is significantly different from the energy deposited in the detector. This problem divides naturally into a calculation of the energy loss that results in excitation and low-energy secondary electrons which do not travel far from their production points, and a calculation of energy loss that results in high-energy secondary electrons which can escape from the detector. The first calculation is performed using a modification of the Vavilov energy loss distribution. A cutoff energy is introduced above which all electrons are ignored and energy transferred to low energy particles is assumed to be equivalent to the energy deposited by them. For the second calculation, the trajectory of the primary particle is considered as a source of secondary high-energy electrons. The electrons from this source are transported using Monte Carlo techniques and multiple scattering theory, and the energy deposited by them in the detector is calculated. The results of the two calculations are then combined to predict the energy deposition distribution. The results of these calculations are used to predict the charge resolution of parallel-plate pulse ionization chambers that are being designed to measure the charge spectrum of heavy nuclei in the galactic cosmic-ray flux

Secondary electron background produced by heavy nuclei in a multiwire proportional counter hodoscope

The secondary electron background produced by heavy nuclei in a multiwire proportional counter hodoscope is calculated using both a simplified and a more complete Monte Carlo model. These results are compared with experimental data from a small multiwire proportional counter hodoscope operated in a 530 MeV/nucleon accelerator beam of nitrogen nuclei. Estimates of the secondary electron background produced by heavy relativistic nuclei are presented along with the detailed results from calculations of energy deposition in the hodoscope counter cells

Charged particle radiation environment for the Spacelab and other missions in low earth orbit, revision A

The physical charged particle dose to be encountered in low earth orbit Spacelab missions is estimated for orbits of inclinations from e8.5 to 90 deg and altitudes from 200 to 800 km. The dose encountered is strongly altitude dependent, with a weaker dependence on inclination. Doses range from 0.007 rads/day at 28.5 deg and 200 km to 1.57 rads/day at 28.5 deg and 800 km behind a 5.0 g/sq cm shield. Geomagnetically trapped protons were the primary source of damage over most of the range of altitudes and inclinations, with galactic cosmic rays making a significant contribution at the lowest altitudes

A Qualitative Descriptive Study: What South Carolina Church Leaders Believe About Congregational Active Shooter Preparation

The purpose of this qualitative descriptive study is to establish a baseline of understanding what experiences South Carolina Southern Baptist church leaders have in active shooter training and what they believe about preparing, training, and equipping congregations for an active shooter incident in their house of worship. This researcher examined how church leaders prepare, train, and equip congregations for security threats like active shooter incidents. This study fills a gap in the existing literature, adding to the research by Auten (2021), Rainer (2017), and the FBI (2016). This researcher examined how churches prepare for security threats like active shooter incidents. This qualitative descriptive study aimed to understand what church leaders of 12 Southern Baptist churches in South Carolina believe about preparing, training, and equipping their congregations for an active shooter incident in their house of worship. The foundational theories discussed in this study include Social Bond/Control Theory, Five Stage Sequential Model Theory, Group Socialization Theory, and Mass Shooting Contagion Theory. Through a qualitative survey and interviews, this researcher discovered what South Carolina Southern Baptist church leaders think about the possibility of an active shooter in their church. The Research Subjects were randomly chosen from South Carolina Southern Baptist churches. For this study, church leaders are defined as individuals in formal leadership positions at the executive level, including senior and associate pastors of biblically based Southern Baptist church organizations in South Carolina

Psychiatric Challenge of Witnesses

Although insane\u27 persons were incompetent as witnesses at early common law, the modern view is that the effect of mental illness upon competency is a preliminary question for the court in the absence of contrary statutory direction. An insane person is generally said to be a competent witness if he can understand the sanctions imposed to elicit the truth and can correctly recount the occurrence which is the subject of his testimony. Some courts exclude evidence of insanity offered for purposes of impeachment but most courts admit such evidence, treating medical and lay testimony with equal respect because of the refusal of the earlier cases to consider insanity as exclusively within the province of experts