Browsing by Author "Walsh, RL"

Now showing 1 - 4 of 4
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    Computer analysis of results as they are obtained from a nuclear experiment
    (Australian Atomic Energy Commission, 1972-12) Walsh, RL
    The equivalence of mass and energy and the conservation of momentum can be demonstrated by measuring the energy of gamma rays emitted when positrons are annihilated. This measurement can be made using a small computer for data storage and analysis and for equipment control.
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    Energy dependence of Vp for 233U, 235U and 239Pu below 5.0 MeV.
    (Australian Atomic Energy Commission, 1971-04) Walsh, RL; Boldeman, JW
    Measurement were made of the energy dependence of Vp for neutron induced fission of 233U from thermal to 2.0 MeV. An analysis has been made of all existing data below 5 MeV for 233U, 235U and 239Pu. It is observed from this analysis that the energy dependence of Vp for all three nuclei may be characterized by a two line dependence in which the change of slope occurs at the pairing energy. The nature of the Vp(En) dependence is explained in terms of the double-humped fission barrier and is consistent with the adiabatic assessment of weak coupling of the collective degrees of freedom at the saddle point to the nuclear degrees of freedom at scission.
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    Preparation of thin targets of 239Pu, 233U and 235U by the method of electrospraying
    (Australian Atomic Energy Commission, 1981-05) Walsh, RL; Senior, IF
    The preparation of thin uniform targets of 239Pu, 233U and 235U by the method of electrospraying is described. The technique has established advantages over other methods of target preparation for example high deposition efficiency ease of recovery of unused material and simplicity of operation. These targets are used for neutron-induced fission experiments.
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    Prompt neutrons from 236U fission fragments
    (Australian Atomic Energy Commission, 1971-03) Boldeman, JW; Musgrove, ARD; Walsh, RL
    Measurements were made of prompt neutron emission in the thermal neutron fission of 235U. The mean neutron emission per fragment was obtained for particular values of the fragment mass and total kinetic energy. A direct neutron counting method was employed and a comparison made with data from previous experiments of this type.