Observations with Electron-Sensitive Plates Exposed to Cosmic Radiation
@article{Brown1949ObservationsWE, title={Observations with Electron-Sensitive Plates Exposed to Cosmic Radiation}, author={R. Brown and Ugo Camerini and Peter Howard Fowler and Hilary Muirhead and Cecil Frank Powell and David M. Ritson}, journal={Nature}, year={1949}, volume={163}, pages={82-87} }
PART 2. FURTHER EVIDENCE FOR THE EXISTENCE OF UNSTABLE CHARGED PARTICLES, OF MASS ∼ 1,000 me, AND OBSERVATIONS ON THEIR MODE OF DECAY
65 Citations
Observation of a τ-Meson
- PhysicsNature
- 1952
ANOTHER example1–3 of a τ-meson has been found, on an Ilford G5 plate, 1,200 microns thick, exposed on Mount Rosa (4,550 m. above sea-level) surrounded by an aluminium absorber 5 cm. thick.
CXXXVI. The decay-in-flight of a heavily-ionizing τ-meson
- Physics
- 1953
Abstract A τ-meson has been observed to decay in the gas of a cloud chamber operated without a magnetic field. The r-meson was apparently created directly in an energetic nuclear interaction. Its…
Longevity and Highest-Energy Cosmic Rays
- Physics
- 1999
It is proposed that the highest energy ~1020eV cosmic ray primaries are protons which are decay products of a superheavy particle, G. The protons may be decay products either directly of a nearby…
THE DECAY OF THE /tau/-MESON
- Physics
- 1953
The applicability of the hypothesis of charge independence is discussed for the τ-meson. One consequence of this hypothesis is that the frequency of charged τ-meson decay leading to a single charged…
Cosmic rays and particle physics
- Physics
- 1982
Preface 1. Cosmic rays 2. Particle physics 3. Cascade equations 4. Hadrons and photons 5. Accelerator data 6. Muons 7. Neutrinos 8. Neutrino-induced muons 9. Propagation 10. Gamma rays and…
The Discovery of the π Meson, the Nuclear Emulsions, and the First “Strange” Particles
- Physics
- 2013
In 1940, the Japan physicists Sin-Itiro Tomonaga (1906–1979) and Gentaro Araki pointed out that the positive and negative muons, at the time still identified with the Yukawa mesons, should behave…
FROM PIONS TO PROTON DECAY: Tales of the Unexpected
- Physics
- 2005
▪ Abstract This account recalls early observations of elementary particles from cosmic ray experiments, using the nuclear emulsion technique. Discoveries in this field in the 1940s and 50s led to the…
The new unstable cosmic-ray particles
- Physics
- 1953
A detailed description is given of the properties of the new unstable particles with masses between 400 me and 2200 me. Wilson cloud chamber experiments have provided definite evidence for the…
Discovery of Hypernuclei : The Beginnings
- Physics
- 1985
Cosmic ray research has been viewed as a key to the initiation and development of hypernuclear physics. A retrospect of the early stages of hypernuclear studies is presented. Main steps in the…
References
SHOWING 1-9 OF 9 REFERENCES
Recording of Charged Particles of Minimum Ionizing Power in Photographic Emulsions
- MathematicsNature
- 1948
SINCE the announcement of a photographic emulsion of sufficient sensitivity to record unmistakably the tracks of electrons1, interest has centred on the possibility of achieving further increases in…
Determination of the masses of charged particles observed in the photographic plate
- Physics
- 1948
A study has been made of scattering of 40 protons and 160 mesons in photographic emulsions in order to determine the mass of the individual particles. The spread in the values so obtained is large,…
Processing Thick Emulsions for Nuclear Research
- PhysicsNature
- 1948
IN the application of the photographic method to research in cosmic-ray and nuclear physics, the need has always been felt for emulsions of thickness comparable with the range of the particles to be…
A Determination of the Ratio of the Masses of π- and μ-Mesons by the Method of Grain-counting
- Physics
- 1948
The Ionization Loss of Energy of Fast Charged Particles in Gases and Condensed Bodies
- Physics
- 1948
The ionization loss of particles is treated, taking into account the polarization properties of the medium traversed. The medium is characterized by a general expression for a complex dielectric…
Observations on the Production of Mesons by Cosmic Radiation
- PhysicsNature
- 1948
It is shown that at least the majority of the ‘ejected' mesons observed interact with nuclei and are therefore negatively charged; and that on the average they produce more vigorous nuclear disintegrations than most of the negative mesons which stop in the emulsions after being generated outside it.