Disintegration of the Diplon


IT has been shown by Oliphant, Harteck and Lord Rutherford in a recent letter1 that the bombardment by high-velocity diplons of compounds containing diplogen gives rise to three groups of particles—two groups of equal numbers of singly charged particles of ranges 14.3 cm. and 1.6 cm., together with neutrons of maximum energy of about three million volts. They suggest as possible explanations of these results the reactions: an atom of 1H3 of 1.6 cm. range and a proton of 14.3 cm. range satisfying the momentum relations in reaction (1). In this reaction it is to be expected that the proton and the isotope of hydrogen of mass 3 would recoil in opposite directions, except for a small correction due to the momentum of the captured diplon. The cloud track method is extremely suitable for an examination of this possibility, and I have recently taken expansion chamber photographs of the disintegration particles resulting from the bombardment of a target of heavy ammonium sulphate with diplons, to see if further information can be obtained.

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  1. 1

    NATURE, 133, 413, March 17, 1934.

  2. 2

    Proc. Roy. Soc., A, 141, 722; 1933.

  3. 3

    NATURE, 132, 818, Nov. 25, 1933.

  4. 4

    NATURE, 133, 377, March 10, 1934.

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