The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science

Journal Information
ISSN / EISSN : 1941-5982 / 1941-5990
Published by: Informa UK Limited (10.1080)
Total articles ≅ 24,252
Current Coverage
LOCKSS
Filter:

Latest articles in this journal

K.J. Le Couteur, S. Lipton
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1265-1280; https://doi.org/10.1080/14786441208521137

Abstract:
To extract a beam of a maximum energy from a synchrocyclotron, the deflector must be placed at the edge of the magnet, where the magnetic field falls off very rapidly and non-linearly with radius. This presents an analytical problem of coupled non-linear differential equations with periodic coefficients which is solved approximately. The results have been checked by electronic .computation. It is concluded that a nonlinear deflector can extract the beam with higher energy and perhaps greater theoretical efficiency than the linear one at present working at Liverpool. The new method is mechanically simpler than the old for it has no peeler, only a regenerator. The mathematics has interest apart from this application, for the difficulty of handling these coupled cyclotron equations is a major obstacle to the development of new particle accelerators of the fixed field type.
W. Bosley, I.S. Hughes
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1281-1286; https://doi.org/10.1080/14786441208521138

Abstract:
Measurements have been made on the single (large angle) and multiple coulomb scattering of electrons and positrons in nuclear emulsions. The results obtained for single scattering are in general agreement with the theoretical expectations, and appear to confirm the prediction of a difference between the nuclear scattering of electrons and positrons at 10 mev, although the data are insufficient to permit detailed comparison. The results for the multiple scattering show an unexplained difference between the two types of particle. The number of positrons observed to annihilate in flight is in agreement with the theoretical predictions of Dirac (1930).
C.F.M. Cacho, M.A. Grace, C.E. Johnson, A.C. Knipper, R.G. Scurlock, R.T. Taylor
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1287-1294; https://doi.org/10.1080/14786441208521139

Abstract:
141Ce has been aligned by the method of magnetic hfs (alignment) in a crystal of cerium ethyl sulphate. From measurements of the angular distribution and the plane of polarization of the γ-radiation it is concluded that the γ-ray transition is principally M1 with a small admixture of E2 (δ=+0·08±0·02). Values of 0·75±0·20 and 0·66±0·16 nuclear magnetons are found for the nuclear moment of 141Ce, depending on whether the β-transition involves a spin change of 1 or 0.
G.E. Backus
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1310-1327; https://doi.org/10.1080/14786441208521141

Abstract:
The eigenvalue problem which describes the onset of convection in a fluid sphere heated within is solved by means of expansions of the convective velocity field and temperature in spherical Bessel functions. The Rayleigh number Cl,n, at which there first appears the nth radial convection pattern with the spherical symmetry of the lth spherical harmonic, can be computed for any l and n by this device, and bracketed to arbitrary accuracy. A table of Cl,n for Ifrom 1 through 6 and n=1 and 2 is compared with Chandrasekhar's values of C l 1 obtained by a variational method. A similar attack is shown to succeed on the classical Rayleigh- Benard problem of convection in a horizontal layer of fluid. Finally, the class of problems which should be amenable to such an attack is delineated.
E.W.J. Mitchell, E.G.S. Paige
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1353-1361; https://doi.org/10.1080/14786441208521145

Abstract:
Measurements have been made, using polarized light, of the anisotropy of the visible absorption of centres induced in quartz by x-ray, gamma and neutron irradiation. The ratio of the integrated absorption when the electric vector is parallel to the c-axis to that when it is perpendicular, is 1 ·5. An experiment is described which suggests that the optical absorption is associated with substitutional aluminium impurity. It is shown that a value of 1·3 would be expected from the O'Brien and Pryce model of the magnetic resonance centre which is induced under similar conditions.
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1365-1366; https://doi.org/10.1080/14786441208521147

J.W. Leech
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1328-1336; https://doi.org/10.1080/14786441208521142

Abstract:
A calculation is made of the effect of including the retarded potential term of quantum electrodynamics when evaluating the van der Waals interaction between two atoms. In disagreement with the conclusions of Casimir and Polder the interaction energy at large distances is found to vary as R-3.
R.W.P. Drever, A. Moljk
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1337-1342; https://doi.org/10.1080/14786441208521143

C.J. Ball, P.B. Hiksch
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Volume 46, pp 1343-1352; https://doi.org/10.1080/14786441208521144

Back to Top Top