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AN ITERATIVE METHOD FOR THE SOLUTION OF A NON-LINEAR INVERSE PROBLEM IN MAGNETIC INTERPRETATION

Kunaratnam, K (1972-06)

A method is presented for determining the lower surface of a two-dimensional body producing a magnetic anomaly when its upper surface and the intensity of magnetization are given. The magnetization vector is assumed to lie ...

The Born-Green equation for liquid metals

Kumaravadivel, R; Evans, R; Greenwood, D.A (1974)

Conflicting reports have appeared in the literature concerning the usefulness of the Born-Green equation to determine effective interionic pair potentials in liquid metals from measured structure factors. To elucidate the ...

Calculations of the surface energy of simple liquid metals

Kumaravadivel, R; Evans, R (1975)

Calculations of the surface energy of eleven liquid metals are presented. These are based on the recently proposed pseudo-atom theory of Evans (see abstr. A72625 of 1974). The results are in good agreement with experiment ...

A thermodynamic perturbation theory for the surface tension and ion density profile of a liquid metal

Evans, R; Kumaravadivel, R (1976)

Assuming that the interaction between metallic pseudo-ions is of the form introduced by Evans (1974, 1975), an approximate expression for the excess free energy of the system is derived using the thermodynamic perturbation ...

The entropies and structure factors of liquid simple metals

Kumaravadivel, R; Evans, R (1976)

Some results of a systematic study of the entropies and structure factors of fourteen liquid simple metals are presented. The ab initio model potentials of Shaw (1968) and the dielectric function of Vashista and Singwi ...

The dissociation pressure of γ-phase titanium hydride at 20-70 degrees C

Surplice, N.A; Kandasamy, K (1978)

Thin films of titanium were allowed to interact with a continuous flow of hydrogen until they were saturated (r(H/Ti)=2). Their dissociation pressure was 1.2*10-3 Torr at 20 degrees C and 4*10-2 Torr at 70 degrees C. These ...

The interaction of titanium films with oxygen over a wide range of pressures and exposures

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1980)

The interaction of titanium films with oxygen has been studied by observing their change of resistance R and workfunction phi over the range of gas pressures from UHV to 5 Torr and exposures from 0-106 Torr s. The changes ...

Simplified expressions for the magnetic anomalies due to vertical rectangular prisms

Kunaratnam, K (1981)

The magnetic anomaly due to a uniformaly magnetized vertical rectangular prism and that due to an arbitrary structure which can be divided into a number of such prisms are expressed in forms suitable for rapid computation. ...

The predominance of a surface plane of high work function on Ti films

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1981)

The contact potential between clean Ti films and an Au reference surface have been determined by the Kelvin vibrating capacitor method. The majority of Ti films deposited on glass substrates had a high work function, which ...

Spatial dependence of day-time vertical polarisation of Pc 3-5 magnetic pulsations in Sri Lanka

Kunaratnam, K (1981-12)

The rate of change of the horizontal and vertical components of magnetic pulsations in the period range 20-600 s have been recorded at four stations in Sri Lanka, namely, Vavuniya, Maradankadawela, Maho and Colombo. An ...

The phase boundaries of the H-Er, H-Sc and H-Yb systems at 295K deduced from changes of film resistance

Surplice, N.A; Kandasamy, K (1982)

The phase boundaries of the H-Er, H-Sc and H-Yb systems were found by measuring changes of resistance as a function of atomic ratio r (r=H/Me) while films of the metals were hydrided at 295K. For H-Er the solution phase ...

The interaction of titanium films with water vapour over a wide range of pressures and exposures

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1982)

The changes of work function phi and resistance R were studied when titanium films were exposed to water vapour at pressures p from UHV to 1.5 Torr and exposures q from 0-104 Torr s. The work function was reduced by ...

Thermodynamic properties of liquid metals

Kumaravadivel, R (1983)

The ability of the model potentials to yield accurate thermodynamic properties of liquid metals is tested. The pressure and bulk moduli calculated by the homogeneous deformation (HD) method depend on the electron density ...

The effects of hydrogen sorption on the resistance and work-function of titanium films at 290K

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1984)

Ti films readily sorbed hydrogen up to an atomic ratio r=2.0 at a saturation pressure of 2*10-3 Torr. The turning points on the curve of resistance R versus r were correlated with the phase boundaries. The maximum on this ...

Fermi levels of FCC and FCT hydrides of Ti and Zr

Kandasamy, K; Surplice, N.A (1984-03-05)

Measurements of the work functions of films of TiHx and ZrHx during the FCC/FCT transition have given the change of Fermi level between these two phases of the hydrides. The results agree with modern calculations of the ...

Pair potentials and structure factors of liquid alkali metals

Kumaravadivel, R; Tosi, M.P (Società Italiana di Fisica, 1984-07)

Measured structure factors of liquid alkali metals are examined in the framework of screened pair potential theory. Information on the main attractive well in the effective pair potential is obtained from the structural ...

Changes of resistance, work function and Fermi level during the hydriding of Zr and Sc at 295K

Kandasamy, K; Surplice, N.A (1985)

The turning points on the curve of resistance versus atomic ratio ( gamma =H/Me) were correlated with the phase boundaries of the H/Zr and H/Sc systems at 295K. The changes of work function with r showed that, at low value ...

The "uphill" diffusion of hydrogen: strain-gradient-induced effects in palladium alloy membranes

Lewis, F.A; Kandasamy, K; Baranowski, B (1988)

Certain unexpected effects observed during developments and reductions of pressures of hydrogen gas inside tubular membranes of palladium alloys now seem to be self-consistently interpretable in terms of lattice-strain-induced ...

Hydrogen chemical potentials and phase transitions in palladium black electrodeposits

Kandasamy, K; Lewis, F.A; McKee, S.G (1988-10)

Results are reported of electrode potential and electrical resistance measurements which provide evidence of subsurface hydride transitions in palladium black electrodeposits at much lower equivalent hydrogen vapour pressures ...

Ignition of thermonuclear fuels utilising the energy liberated in 6Li(n, T)4He reactions

Murukesapilliai; Kanapathipillai (1989-08)

6Li(n, T)4He fusion reactions occur readily at room temperature and liberate 4.8 MeV per reaction. It is shown that this energy can be utilised to ignite thermonuclear fusion fuels. The main fuel considered is a mixture ...

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