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Much ado about nothing: deep minima in /sup 45/Sc and /sup 56/Fe total neutron cross sections. [0. 4 to 1000 KeV]

Conference · · Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)
OSTI ID:5166852
 [1]; ; ; ;
  1. Brookhaven National Lab., Upton, NY
+ Show Author Affiliations

The deep minima in /sup 45/Sc and /sup 56/Fe neutron total cross sections were measured at the Gaerttner Linac Laboratory by using thick, ultrapure samples in transmission experiments. The samples are used to produce quasi-monoenergetic beams at the BNL High Flux Beam Reactor. For the /sup 45/Sc minimum near 2.05 keV sigma/sub total/ = 0.71 +- 0.03 barns was obtained, in sharp contrast to a previously reported value of approximately 0.05 barns. The /sup 56/Fe measurement was carried out with a 6-kg, 68.58-cm-long sample of 99.87 percent isotopically pure sample of /sup 56/Fe; a minimum cross section of 0.0085 +- 0.004 barns at 24.39 keV is inferred. This may be compared to a value of 0.420 barns for natural iron. 5 figures, 2 tables.

OSTI ID:
5166852
Journal Information:
Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States), Journal Name: Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States) Vol. 493; ISSN XNBSA
Country of Publication:
United States
Language:
English

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Related Subjects

651523 -- Nuclear Properties & Reactions
A=39-58
Experimental-- Energy Levels & Transitions-- (-1987)
651525* -- Nuclear Properties & Reactions
A=39-58
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
FAST NEUTRONS
FERMIONS
HADRON REACTIONS
HADRONS
INTERMEDIATE MASS NUCLEI
INTERMEDIATE NEUTRONS
INTERNAL CONVERSION RADIOISOTOPES
IRON 56 TARGET
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
LEVEL WIDTHS
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-ODD NUCLEI
P WAVES
PARTIAL WAVES
RADIOISOTOPES
RESONANCE
RESONANCE NEUTRONS
S WAVES
SCANDIUM 45 TARGET
SCANDIUM 46
SCANDIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
TARGETS
TOTAL CROSS SECTIONS