NEUTRON YIELDS FROM THICK TARGETS BOMBARDED BY 18- AND 32-Mev PROTONS

Journal Article · Sat Mar 15 04:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.109.2086· OSTI ID:4331514

Tai, Y; Millburn, G P; Kaplan, S N; Moyer, B J

Neutron yields from thick targein bombarded by 32- and 18-Mev protons were measured for 59 elements and compounds. For 23 metallic elements, yields were also measured from targets thick enough to degrade the proton energy from 32 to 18 Mev. The neutrons were detected by counting the Mn/sup 56/ activity produced by neutron capture in MnSO/sub 4/ solution contained in a 3-ft by 3-ft tank that surrounded the targets. The efficiency of the neutron-detection system was determined with a calibrated Ra- alpha -Be source. For all three energy intervals, the neutron yields increased abruptly at Z = 20 and Z = 30, and Ni had a yield 1/3 that of neighboring elements. The yields were compared with calculations based on the statistical theory of nuclear reactions. The agreement was fair for Z > 30, but the calculated yields did not reproduce the sudden jump at Z = 30. (auth)

• Research Organization: Univ. of California, Berkeley
• NSA Number: NSA-12-008667
• OSTI ID: 4331514
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 109; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACTIVATION ANALYSIS
ALPHA PARTICLES
BERYLLIUM
CAPTURE
COMPOUNDS
EFFICIENCY
ELEMENTS
ENERGY RANGE
MANGANESE 56
MANGANESE SULFATES
MEASURED VALUES
METALS
NEUTRON DETECTION
NEUTRON SOURCES
NEUTRONS
NICKEL
NUCLEAR REACTIONS
NUCLEAR THEORY
NUMERICALS
PHYSICS
PROTON BEAMS
RADIOACTIVITY
RADIUM
SOLUTIONS
STANDARDS
STATISTICS
TARGETS
THICKNESS