Multiwire proportional chamber for imaging thermal, epicadmium, and fast neutrons

Conference · Thu Nov 01 00:00:00 EST 1973

OSTI ID:4411855

Velentine, K; Kaplan, S; Perez-Mendez, V; Kaufman, L

From nuclear science symposium; San Francisco, California, USA (14 Nov 1973). The 25 cm x 25 cm chamber described images thermal and epicadmium neutron beams using two boron-coated conversion screens, and fast neutrons using a single polyethylene converter, Sample images and quantitative attenuation and resolution data are presented, Measurements of neutron attenuation in lucite patterns give good agreement with expected values for thermal, epicadmium, and fast (Pu- Be) beams. The measured mean free energy. This gives good agreement with the experimental data for tracks longer than approx equal 15 mu m (alphas and 160 ions of energies 5.3 to 8.8 MeV and 22 to 42 MeV, respectively). The shorter tracks of fission fragments (90 MeV from /sup 252/Cf) give shorter t/sub p/ values than predicted by the formula above. This is explained by transfer from cylindrical to spherical erosion geometry. (auth)

• Research Organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• NSA Number: NSA-29-010175
• OSTI ID: 4411855
• Report Number(s): LBL-2419; CONF-731112-21
• Resource Relation: Conference: Nuclear science symposium, San Francisco, California, USA, 14 Nov 1973; Other Information: Orig. Receipt Date: 30-JUN-74
• Country of Publication: United States
• Language: English

Related Subjects

N46110* -Instrumentation-Radiation Detection Instruments- General Detectors & Monitors
N42400 -Engineering-Materials Testing
*MULTIWIRE PROPORTIONAL CHAMBERS- PERFORMANCE
*NEUTRON RADIOGRAPHY- MULTIWIRE PROPORTIONAL CHAMBERS
BORON
EFFICIENCY
EPITHERMAL NEUTRONS
FAST NEUTRONS
POLYETHYLENES
SPATIAL RESOLUTION
THERMAL NEUTRONS