Search for fractional charge states in high-energy heavy fragments produced in collisions of 14. 5 A GeV sup 28 Si with Pb and Cu target

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.44.1672· OSTI ID:5218705

He, Y D; Price, P B ^[1]

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1. Department of Physics and Space Sciences Laboratory, University of California, Berkeley, California (USA) Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California (USA)

We used nuclear track detectors to construct the trajectories of interactions and to measure with high resolution the charge of the beam and of heavy nuclear fragments produced in interactions. A null result of our search for fractional charge states in high-energy fragments with charges 8{le}{ital Z}{le}13 produced in collisions of 14.5{ital A} GeV {sup 28}Si nuclei with Pb and Cu targets leads us to conclude that the upper limits for the probability of production of a fragment with charge 23/3, 25/3, 26/3 28/3 29/3, 31/3 32/3, 34/3, 35/3, 37/3, or 38/3 charge unit in Pb and Cu at 90% confidence level are 1.9{times}10{sup {minus}4} and 3.9{times}10{sup {minus}4}, respectively. We set a similar limit on the relative number of particle-stable fragments with 8{le}{ital Z}{le}14 created in the central rapidity region.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5218705
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 44:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

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651620* -- Nuclear Properties & Reactions
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651920 -- Nuclear Properties & Reactions
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGE STATE
CHARGED-PARTICLE REACTIONS
COPPER
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
GEV RANGE
GEV RANGE 100-1000
HEAVY ION REACTIONS
LEAD
LIMITING VALUES
METALS
NUCLEAR FRAGMENTATION
NUCLEAR REACTIONS
PARTICLE IDENTIFICATION
POSTULATED PARTICLES
QUARKS
SILICON 28 REACTIONS
TRAJECTORIES
TRANSITION ELEMENTS