Experiments with polarized 3He at MAMI

Experiments with polarized 3He at MAMI have already a long tradition. The A3 collaboration started in 1993 with the aim to measure the electric form factor of the neutron. At this time MAMI was the second accelerator where experiments with 3He were possible. Some years before this pilot experiment the development of the apparatus to polarize 3He in Mainz started. There are two techniques which allow to polarize sufficient large quantities of 3He. Both techniques will be compared and the benefit of 3He for nuclear physics will be discussed. An review of the experiments done so far with 3He at MAMI will be given and the progress in the target development, the detector setup and the electron beam performance will be pointed out.Comment: Contribution to the Symposium "20 Years of Physics at the Mainz Microtron MAMI", to be published in Eur. Phys. Journal

The f_LT Response Function of D(e,e'p)n at Q^2=0.33(GeV/c)^2

The interference response function f_LT (R_LT) of the D(e,e'p)n reaction has been determined at squared four-momentum transfer Q^2 = 0.33 (GeV/c)^2 and for missing momenta up to p_miss= 0.29 (GeV/c). The results have been compared to calculations that reproduce f_LT quite well but overestimate the cross sections by 10 - 20% for missing momenta between 0.1 (GeV/c) and 0.2 (GeV/c) .Comment: 12 Pages, 10 figure

Measurement of Rlt and Atl in the 4He(e,e'p)3H Reaction at pmiss of 130-300 MeV/c

We have measured the 4He(e,e'p)3H reaction at missing momenta of 130-300 MeV/c using the three-spectrometer facility at the Mainz microtron MAMI. Data were taken in perpendicular kinematics to allow us to determine the response function Rlt and the asymmetry term Atl. The data are compared to both relativistic and non-relativistic calculations.Comment: To be published in the European Physical Journal

High-precision Studies of the 3^{\bf{3}}He(e,e′^{\bf{\prime}}p) Reaction at the Quasielastic Peak

Precision studies of the reaction $^{3}$He(e,e$^\prime$p) using the three-spectrometer facility at the Mainz microtron MAMI are presented. All data are for quasielastic kinematics at $|\vec{q} | =685$ MeV/c. Absolute cross sections were measured at three electron kinematics. For the measured missing momenta range from 10 to 165 MeV/c, no strength is observed for missing energies higher than 20 MeV. Distorted momentum distributions were extracted for the two-body breakup and the continuum. The longitudinal and transverse behavior was studied by measuring the cross section for three photon polarizations. The longitudinal and transverse nature of the cross sections is well described by a currently accepted and widely used prescription of the off-shell electron-nucleon cross-section. The results are compared to modern three-body calculations and to previous data.Comment: 4 pages, 3 figures. Submitted for publication in Phys. Rev. Let

The longitudinal and transverse response of the (e,e'p) reaction in helium-3 and helium-4 in the quasielastic region

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.Vita.Includes bibliographical references (p. 247-251).by Richard E.J. Florizone.Ph.D

Addressing the migration of health professionals: the role of working conditions and educational placements

This article provides a brief overview of the global health-worker shortage, which could undermine the Millennium Development Goal to halt and begin to reverse the spread of HIV/AIDS. The current situation suggests that long-term solutions to shortages can only be found by addressing the problem from a global perspective; that is, to eliminate shortages through substantial investments in training and retaining health workers in developed and developing countries, and not through policies that do not work towards solving this underlying problem, such as ones that restrict migration

Occupying the Threshold: Voids as Opportunities

Cities begin as vast vacant land; when physical form is inserted a void is created. Infrastructure is the foundation that enables the growth, mobility and exchange of cities and their inhabitants. As these infrastructures and corresponding industries begin to change, they reshape the voids within the city fabric and create both physical and psychological divide. This thesis explores the potential, within this physical divide, to stitch together communities fragmented by deindustrialization through cultural engagement and production. By manipulating the physical and psychological boundaries that have existed within Regina’s city fabric over time, the proposed architectural interventions add a parasitic layer to the warehouse district to socially recharge voids and thresholds that have become lifeless. This layer acts as both the adhesive between past and future development, and the binding agent between disjointed communities, ultimately creating opportunities that become catalysts for urban revitalization

Long-term care in the era of COVID-19: There is no place like home

View archived Policy Briefs; The Policy Brief is a digital and print publication, written by JSGS scholars and leading policy experts, to provide context and perspective on important public issues and to further discussion and debate within the public sector. It provides policy makers and those interested in policy formation with timely and expert analysis, observations and potential policy approaches to relevant issues concerning the public.This issue of JSGS Policy Brief is part of a series dedicated to exploring and providing evidence-based analysis, policy ideas, recommendations and research conclusions on the various dimensions of the pandemic, as it relates here in Canada and internationally