Browsing by Author "Rose, A"

Now showing 1 - 4 of 4
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    Angular measurement of the energy distribution of neutrons from the thick target 7Li(pn)-7Be source
    (Australian Atomic Energy Commission, 1981-11) Rose, A
    The energy spectrum of neutrons emitted from a thick lithium target bombarded by protons has been measured as a function of neutron angle of emission. The measurements were done at proton energies up to 2.8 MeV and at 30 deg. intervals in the range 0 to 120 deg. using proportional detectors with gas fillings of hydrogen and methane. A review is given of papers published on the 7Li(pn)7Be reactions at 0 deg.; where applicable comparisons are made with the present results.
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    Fast fission ratio measurements in multi-rod clusters.
    (Australian Atomic Energy Commission, 1972-10) Rose, A; Jain, HM; Menezes, PF
    A series of Indo-Australian collaborative experiments to measure 238U/235U fission rate ratios in UO2 rod cluster fuel elements is described. The measurements utilised the well known gross fission product gamma ray counting technique, with calibration by double-fission chamber and 140La fission product y-xay counting techniques. Results are given for fast fission ratios measured over a range of simulated light water coolant densities from zero (air) to one (H2O), the mid ranges being covered by high density expanded polystyrene, in clusters of 7, 19, 37 and 61 14.24 mm diameter U02 rods.
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    Integral reaction rates and neutron energy spectra in a well moderated reactor.
    (Australian Atomic Energy Commission, 1963-04) Connolly, JW; Rose, A; Wall, T
    Cadmium ratio measurements in the internal reflector of MOATA haev been made with gold, indium, tungsten, manganese, molybdenum, and copper detectors. These measurements have been analysed on the assumption that the neutron spectrum consists of a Maxwellian distribution to which is smoothly joined a 1/E slowing down spectrum, cross sections being averaged according to the methods of Westcott. A search through recent literature suggests that the s factors for gold and indium listed by Westcott are in error. If this is accepted then it appears that the measured epithermal spectrum is closely 1/E in form for neutron energies between one and six hundred eV. The corrections to be applied when foils of finite thickness are used in cadmium ratio measurements are discussed, and the spectrum derived from these measurements has been used to calculate reaction ratios of cooper: indium and copper: gold alloy foils. These ratios have been compared with measured values. Values of the effective resonance integral of Pt198 wire detectors have been measured, and from these values an estimate has been made of the infinitely dilute resonance integral of this isotope.
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    A q-switched ruby laser for producing laser-doped contacts to semiconductors
    (Australian Atomic Energy Commission, 1982-08) Rose, A; Lawson, EM
    A description is given of a q-switched ruby laser used for producing laser-doped contacts on semiconductors.Homogenisation of the laser beam and measurement of the output energy are discussed and some attention is given to the problems of sample reflectivity. A brief outline of the laser-doping process is provided, together with recent experimental results and details relating to the production and analysis of the contacts. A preliminary result of defect characteristics after laser irradiation of germanium is also presented.