Neutron and gamma-ray dose-rates from the Little Boy replica
We report dose-rate information obtained at many locations in the near vicinity of, and at distances out to 0.64 km from, the Little Boy replica while it was operated as a critical assembly. The measurements were made with modified conventional dosimetry instruments that used an Anderson-Braun detector for neutrons and a Geiger-Mueller tube for gamma rays with suitable electronic modules to count particle-induced pulses. Thermoluminescent dosimetry methods provide corroborative data. Our analysis gives estimates of both neutron and gamma-ray relaxation lengths in air for comparison with earlier calculations. We also show the neutron-to-gamma-ray dose ratio as a function of distance from the replica. Current experiments and further data analysis will refine these results. 7 references, 8 figures.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7099497
- Report Number(s):
- LA-UR-84-1723; CONF-840627-1; ON: DE84012587
- Resource Relation:
- Conference: 29. annual meeting of the Health Physics Society, New Orleans, LA, USA, 3 Jun 1984; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Neutron dosimetry of the Little Boy device
Neutron and gamma-ray dose measurements at various distances from the Little Boy replica
Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR WEAPONS
GAMMA DOSIMETRY
NEUTRON DOSIMETRY
ANGULAR DISTRIBUTION
DOSE RATES
EXPERIMENTAL DATA
GAMMA RADIATION
HIROSHIMA
NEUTRONS
ASIA
BARYONS
DATA
DISTRIBUTION
DOSIMETRY
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INFORMATION
IONIZING RADIATIONS
JAPAN
NUCLEONS
NUMERICAL DATA
RADIATIONS
WEAPONS
450202* - Explosions & Explosives- Nuclear- Weaponry- (-1989)
654003 - Radiation & Shielding Physics- Neutron Interactions with Matter