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Possible Existence of a Neutron
IT has been shown by Bothe and others that beryllium when bombarded by α-particles of polonium emits a radiation of great penetrating power, which has an absorption coefficient in lead of about 0.3Expand
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The existence of a neutron
§ 1. It was shown by Bothe and Becker that some light elements when bombarded by α-particles of polonium emit radiations which appear to be of the γ-ray type. The element beryllium gave aExpand
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A ‘Nuclear Photo-effect’: Disintegration of the Diplon by γ-Rays
BY analogy with the excitation and ionisation of atoms by light, one might expect that any complex nucleus should be excited or ‘ionised’, that is, disintegrated, by y-rays of suitable energy.Expand
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Bakerian lecture.―The neutron
1. In an earlier paper I showed that the radiations excited in certain light elements by the bombardment of α -particles consist, at least in part, of particles which have a mass about the same asExpand
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Radiations from Radioactive Substances
Preface 1. Radioactive transformations 2. The alpha rays 3. Absorption of the alpha rays 4. Some properties of the alpha particle 5. Theories of absorption of alpha rays 6. Secondary effects producedExpand
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The nuclear photoelectric effect
Some time ago we reported in ‘Nature’ the observation of a nuclear photo-effect, the disintegration of the deutron by γ-rays. An effect of y-rays upon complex nuclei might be expected to occur fromExpand
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Discussion on the structure of atomic nuclei
Sir Ernest Rutherford: It was on March 19, 1914, that the Royal Society held its last discussion on the constitution of the atom—just fifteen years ago. I had the honour to open the discussion onExpand
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The Neutron and its Properties
The subject of my lecture, the neutron and its properties, has at present no professional applications for the radiologist, but it has some points of general interest apart from its mere novelty. TheExpand
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Disintegration by Slow Neutrons
FERMI and his collaborators1 have reported that neutrons slowed down by collisions in substances containing hydrogen are captured by many nuclei very much more frequently than are fast neutrons. InExpand
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