Slow Neutron Velocity Spectrometer Studies. III. I, Os, Co, Tl, Cb, Ge
- 1 February 1947
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 71 (3), 174-181
- https://doi.org/10.1103/PhysRev.71.174
Abstract
The thermal line for iodine is . Crystal interference effects are apparent at low energies. There is a resonance at (20.6±0.4) ev with . A flat-bottomed dip at 37 ev suggests two levels at (32±2) ev and (42±2) ev with approximately equal values of . The thermal line for osmium is with crystal interference effects at low energies. There are levels at (6.5±0.3) ev with , at (8.8±0.3) ev with , at (20±1) ev with , probable levels at (28±1.5) ev with , at (42±2) ev with , at 84 ev and several unresolved levels above 84 ev. The thermal line for cobalt is . There is an unusually strong dip at (115±5) ev with (if single) and indications of other strong unresolved levels in the region of 1000 to 10,000 ev. The thermal line for thallium is probably []. There are strong crystal interference effects at low energies. There is a strong dip in the transmission curve at 270 ev and another broad dip near 1100 ev. Columbium shows only a slight effect with strong crystal interference effects at lower energies. Only a slight dip at 4.1 ev attributed to a slight Ta impurity was found in the higher energy region. Germanium shows no thermal slope because of the strong crystal interference effects. There is a (perhaps multiple) level at 95 ev with .
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