STUDY OF THE PENETRATING SHOWERS PRODUCED BY COSMIC RADIATION IN LITHIUM AND OBSERVED WITH A WILSON CLOUD CHAMBER

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Helvetica Physica Acta (Switzerland)

OSTI ID:4231325

Gribi, M; Heinrich, F; Loeliger, H; Pictet, J M; Rytz, A; Waffler, H; Walter, M

The interactions in lithium of high-energy charged cosmic-ray particles were studied by means of a Wilson cloud chamber, which was set up 11,350 ft above sea level. The lithium target was located just above the chamber, which contained three gold plates. The results obtained from the analysis of 197 lithium showers are described. The integral distribution of the multipliclty n of the charged secondaries was extracted, corrected, and plotted. The development through the chamber plates of the electron cascades created by the disintegration photons of neutral pi mesons was studied for 96 showers. The total energy E/sub pi 0/ of the neutral pi meson component was measured for each shower and the integral distribution of these values plotted. The average energy E/sub pi 0/ was determined for each multiplicity n and conversely, the average multiplicities n corresponding to diffarent energy groups E/ pi 0/. The absorption and interactions of the shower secondaries in the chamber plates were also studied. Finally, the frequency of emission of V particles in showers created in a lithium target was compared with the corresponding value measured with an aluminum target. The multiplicity and energy distributions were analyzed from two points of views the plural theory and the multiple theory of meson production. The model proposed by the first theory was developed and found to be in good agreement with the results. A comparison with the second theory was found difficult because of the large fluctuations that it predicts. The characteristics of the showers observed in this experiment, with a target located outside the chamber, were found to be very similar to those observed in other experiments where the target was located inside the chamber. (auth)

• Research Organization: Universite, Zurich
• NSA Number: NSA-13-019571
• OSTI ID: 4231325
• Journal Information: Helvetica Physica Acta (Switzerland), Journal Name: Helvetica Physica Acta (Switzerland) Vol. Vol: 32; ISSN HPACA
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ABSORPTION
ALUMINUM
CHARGED PARTICLES
CLOUD CHAMBERS
COSMIC RADIATION
DISTRIBUTION
ELECTRONS
EMISSION
ENERGY
GOLD
HYPERONS
INTERACTIONS
LEVELS
LITHIUM
MEASURED VALUES
PARTICLE MODELS
PARTICLE TRACKS
PHOTONS
PHYSICS AND MATHEMATICS
PIONS
PLATES
SCATTERING
SHOWERS
SPECTRA
TARGETS
V PARTICLES