• H J Taylor

      Articles written in Proceedings – Section A

    • The tracks of the α-particles of thorium and its products

      H J Taylor V D Dabholkar

      More Details Abstract Fulltext PDF

      The tracks of the α-particles from members of the thorium series have been recorded in a photographic emulsion, by the use of a technique previously developed. Radiothorium atoms introduced into the emulsion disintegratein situ, emitting five α-particles in succession. In this way “stars” are produced, consisting of five tracks radiating from a point, of which a discussion is given. Photomicrographs of two “stars” are reproduced.

    • The tracks of theα-particles of thorium and its products

      H J Taylor V D Dabholkar

      More Details Abstract Fulltext PDF

      The tracks of theα-particles from members of the thorium series have been recorded in a photographic emulsion, by the use of a technique previously developed. Radiothorium atoms introduced into the emulsion disintegratein situ, emitting fiveα-particles in succession. In this way “stars” are produced, consisting of five tracks radiating from a point, of which a discussion is given. Photomicrographs of two “stars” are reproduced.

    • The measurement of surface tension by means of sessile drops

      H J Taylor J Alexander

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      Apparatus is described by means of which sessile drops can be formed on the upper end of a vertical tube. The drops can be renewed as frequently as desired. Photographs of the drops are measured and from the dimensions the surface tension is calculated with the help of a new reduction table given in the paper. The method in this form is considered to be as reliable as any of the other standard methods. It has been applied to measure the surface tension of pure water against saturated air. The value at 20°C. is found to be 72·70±0·07 dyn./cm., in good agreement with other determinations.

    • Stars and single tracks in nuclear plates

      H J Taylor H J Bhabha R R Daniel J R Heeramaneck M S Swami G S Shrikantia

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      Photographic plates exposed at high altitudes show a population of stars and isolated single tracks. Statistics are given covering 288 stars and 655 isolated tracks found in an area of 17 sq. cm. Some tracks are closely associated with the stars, and these have a mean range of 4·1 cm. air. The remainder, which show no association with stars, have a mean range of 3·4cm. air. Some stars have more than one associated single track. Alternative explanations are discussed. The most probable hypothesis appears to be that the single tracks are due to the spontaneous disintegration of unstable neutral particles emitted from the stars.

    • High altitude balloon experiments and measurement of the heavy primary radiation flux at the geomagnetic equator

      H J Taylor M Sitaramaswami P N Krishnamoorthy

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      The paper describes high-altitude balloon experiments with nuclear plates, made near the geomagnetic equator. A magnetic orientating unit was used. The behaviour of balloons is discussed, and it is shown that systems of balloons may have a series of stable floating levels at determinate altitudes. Analysis of the tracks observed in the plates has given the following values for the primary cosmic ray flux at the geomagnetic equator: For 6⩽Z⩽10, N0=1·45±0·30 particles/m.2 sec. sterad. For Z>10, N0=0·33±0·08 particles/m.2 sec. sterad. Any observable E.W. asymmetry at the heights reached by the plates is within the statistical uncertainty of the results. The charge spectrum is in general similar to what has been previously observed.

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