[en] Electromagnetically induced multi nucleon emission is expected to be sensitive to short-range components of the nuclear wave function. If a photon is absorbed on two protons then the contribution from charged meson-exchange currents vanishes Therefore, proton-proton emission is expected to be more sensitive to correlations in the nuclear wave function than is neutron-proton emission. Cross sections have been measured for (γ,pp) simultaneously from both ⁴He and ¹²C targets with tagged photons over the energy range 187-227 MeV using a large acceptance detector. Comparisons of angular correlations, missing energy and missing momentum for the two nuclei will be shown along with the results of theoretical calculations

[en] The potential of tandem accelerator based mass spectrometry [TAMS] for the detection and measurement of rare isotopic abundances has been demonstrated consistently at numerous laboratories. Based on these exploratory experiments, a number of dedicated facilities are presently under construction, primarily for the measurement of the radioisotopes ¹⁴C and ³⁶Cl at natural abundances. To further increase the versatility of the Unversity of Toronto Isotrace laboratory using TAMS, a series of modifications is being considered to make possible the detection of heavier ions, for example the rare earth elements, Pt, Pu, and to improve the precision of isotope ratio measurements. These modifications are discussed

[en] Recent proton Compton scattering data from Saskatoon spanning the pion threshold region are shown to reflect the presence of a unitarity cusp (Wigner cusp), long predicted but never before observed. The analysis is based on a formulation of the Compton cross section employing convenient semiphenomenological expressions for the four dominant multipole amplitudes, designed to respect the low energy theorem and other constraints. Unitarity anomalies have now been detected in both the elastic (Compton) and inelastic (π⁰p) channels of the γ+p reaction

[en] An all electrostatic mass spectrometer capable of very high mass resolution, broad band mass analysis and high sensitivity is proposed. The system achieves its high mass resolution by a novel time of flight detector in which ion flight times are essentially isochronous with respect to small variations in ion energy, incident angle and initial displacement at the start detector. This 'isochronator' would be used in conjunction with a small tandem accelerator as a molecular disintegrator, electrostatic analyzer and an electrostatic ion injector. The capability of this system and some of its applications are discussed. (orig.)

[en] A proposed mass-independent search for fractionally charged particles with the all-electrostatic line of the IsoTRACE Laboratory at University of Toronto is described. Sensitive measurement of the fractional charge is accomplished by (1) a judicious choice of ion source and ion species, (2) charge changing and electrostatic analysis before injection into the tandem accelerator, (3) molecular destruction, charge changing, and acceleration by the tandem, (4) charge state selection and E/q analysis after acceleration, and (5) particle energy measurement with a Si surface barrier detector. In addition, the mass of the fractionally charged particles can be determined by a time of flight spectrometer. Specific cases involving +- (1/3)e and +- (2/3)e particles are discussed. Also included in the discussion are: integral charge background rejection, the procedure of the search, the signature of the fractionally charged particles, he resolutions of the analyzers and detectors, and the expected energy and time of flight spectra

[en] It is the purpose of this article to describe the CLS (Canadian Light Source) facility in general terms (Sham 2002 looks at the production of SR in more detail), then describe the beamlines at the CLS that will be of interest to the EEMSA group, and suggest ways of gaining access to foreign SR facilities in the next two years and the CLS after 2004. Most of the innovative science in EEMSA at the CLS and other third generation synchrotrons will be described in other articles in this volume especially hard X-ray examples. We will conclude this article with examples of innovative research that can be carried out at the CLS in the IR and soft X-ray regions, which are not covered in other articles to our knowledge. (author)

[en] The Canadian Light Source (CLS) is a 2.9 GeV synchrotron light facility currently under construction in Saskatoon, Saskatchewan. The design goal was to achieve 3rd generation characteristics in a relatively compact lattice to produce a very economical light source. Full energy injection is provided by a booster synchrotron fed by a 250 MeV linac. The design goal is 500 mA and an emittance of 18 nm-rad using dispersion leakage. Unusual design features include ramping the booster as a resonant LRC circuit. A superconducting RF cavity similar to the Cornell design may provide the power in the storage ring. These and other details will be briefly described

[en] Accidents have been postulated where flammable mixtures of D₂/O₂/He/D₂0 may arise in the moderator cover gas of a CANDU (CANDU Deuterium Uranium) reactor. Uncovered adjuster rods are considered as a possible ignition source should a flammable mixture arise. The safety margin for ignition is assessed from the difference between the surface temperatures required to ignite the mixture and the surface temperature achievable by the rods. This paper describes the experimental determination of surface ignition temperatures required to ignite the postulated mixtures. The effects of radiation on ignition behaviour are specifically addressed

[en] The proton Compton effect has been studied in the region between the threshold for pion photoproduction and the Δ (1232). The measurements were performed using a bremsstrahlung endpoint technique and the high duty factor electron beam available at the Saskatchewan Accelerator Laboratory (SAL). The elastically scattered photons were detected with approximately 1.5% energy resolution using the Boston University NaI total absorption scintillation detector. Angular distributions have been determined for 136MeV ≤ E_γ ≤ 288 MeV and for angles in the range 50 degrees < θ_cm < 150 degrees. These angular distributions and the excitation functions derived from them are in excellent agreement with recent theoretical analyses. 14 refs., 5 figs

[en] We have measured (γ,p) and (γ,n) differential yields at 90 degree for the two-body photodisintegration of ⁴He using tagged photons of energy E_γ=25--60 MeV. Data for both channels were obtained simultaneously using windowless ΔE-E telescopes to detect the ³He and ³H recoils. The ration of our angle-integrated yields, which is insensitive to systematic uncertainies due to the simultaneity of the measurements, agrees with calculations employing only charge-symmetric nuclear interactions. Thus, within the present errors, our data show no evidence of a significant charge-symmetry violation in ⁴He in this energy range