Punchthrough calculations for neutrons using CALOR89

Technical Report · Tue Sep 01 00:00:00 EDT 1992

OSTI ID:6999827

Moore, B; Smith, V ^[1]; Reidy, J ^[2]

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1. University of Mississipi, University, MS (United States). Dept. of Physics
2. Superconducting Super Collider Lab., Dallas, TX (United States)

Punchthrough calculations for blocks of iron, copper, depleted uranium and lead of thicknesses of 10 and 12 interaction lengths have been completed for incident negative pions of 10 GeV and 100 GeV using the CALOR89 simulation code. The most numerous particles escaping out the back of the blocks are neutrons. The simulations show that there are significantly more neutrons escaping out the back of the lead block than any of the other absorbers, despite neutron production by fission in the depleted uranium. Two effects are held to be primarily responsible for this. First, the proton and neutron shells in lead nuclei are filled, giving lead a low neutron absorption cross section relative to the other absorbers, particularly uranium. Second, the number density of lead is lower than the other absorbers, particularly copper and iron.

• Research Organization: Superconducting Super Collider Lab., Dallas, TX (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC35-89ER40486
• OSTI ID: 6999827
• Report Number(s): SSCL-584; ON: DE93006094
• Country of Publication: United States
• Language: English

Related Subjects

440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BOSONS
C CODES
COLLISIONS
COMPUTER CODES
COMPUTERIZED SIMULATION
CROSS SECTIONS
ELEMENTARY PARTICLES
EMISSION
FISSION
HADRONS
MEASURING INSTRUMENTS
MESONS
NEUTRON EMISSION
NUCLEAR REACTIONS
PIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SHIELDING
SHOWER COUNTERS
SIMULATION
STORAGE RINGS
SUPERCONDUCTING SUPER COLLIDER