INTERACTIONS OF FAST $mu$-MESONS IN LEAD WITH SMALL ENERGY TRANSFER. Technical Report No. 5
Technical Report
·
OSTI ID:4153050
With the Pb target material divided into 1.27 cm slabs between hodoscoped Geiger tubes and surmounted by a magnet cloud chamber, a study was made of the interactions of fast mu -mesons in which at least one evaporation neutron is produced and no additioral charged particles emerge from the slab. The cross section average neutron multiplicity, sigma m-bar, is (15.2 plus or minus 2.1) x 10/sup -29/ cm/sup 2/ per nucleon. From hodoscope observations without neutron coincidence it is found that for an electron-initiated shower to stay concealed in a 1.27 cm Pb plate its energy must be less than about 100 Mev. With the help of "approximation B" track length theory and experimental photonuclear neutron yields, it is calculated that hidden knock-on showers contribute (5.8 plus or minus 1.21 x 10/sup 29/ to the total sigma m-bar, leaving (9.4 plus or minus 2.4) x 10/sup -29/ cm/sup 2/ per nucleon as the result for the direct mu meson nuclear interaction. This analysis is supported by the agreement between the number of visible showers observed and calculated. The neutron yield in the direct interaction is found to increase with mu -meson momentum. The Weizsaecker-Williams approximation is used to calculate the effect expected from the interaction between the electric charge of the mu -meson and the nucleons. Within the rather large uncertainties involved in the use of this approximatlon, there is excellent agreement with the experimental results. (auth)
- Research Organization:
- Washington Univ., St. Louis
- NSA Number:
- NSA-14-011055
- OSTI ID:
- 4153050
- Report Number(s):
- TID-5642
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
CHARGED PARTICLES
CLOUD CHAMBERS
COINCIDENCE METHODS
COSMIC RADIATION
CROSS SECTIONS
DIRECT REACTIONS
ELECTRIC CHARGES
ELECTRONS
ENERGY
EVAPORATION
GEIGER-MUELLER COUNTERS
HODOSCOPE
INTERACTIONS
LEAD
MAGNETIC FIELDS
MEASURED VALUES
MOMENTUM
MUONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE TRACKS
PHOTONEUTRONS
PHYSICS
PLATES
RADIATION DETECTORS
SCATTERING
SHOWERS
TARGETS
THICKNESS
CLOUD CHAMBERS
COINCIDENCE METHODS
COSMIC RADIATION
CROSS SECTIONS
DIRECT REACTIONS
ELECTRIC CHARGES
ELECTRONS
ENERGY
EVAPORATION
GEIGER-MUELLER COUNTERS
HODOSCOPE
INTERACTIONS
LEAD
MAGNETIC FIELDS
MEASURED VALUES
MOMENTUM
MUONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE TRACKS
PHOTONEUTRONS
PHYSICS
PLATES
RADIATION DETECTORS
SCATTERING
SHOWERS
TARGETS
THICKNESS