Abstract
Coherent neutron scattering lengths and total cross sections have been measured on samples of ordinary Sb, Te, I and on isotopically enriched compounds. From the experimental data for neutron energies of 0.57 meV, 1.26 eV and 5.2 eV the following data were obtained:
the coherent scattering lengths (in fm) of the bound atoms Sb (5.57±0.03);121Sb(5.71±0.06),123Sb(5.38±0.07); Te(5.80±0.03) and for its isotopes of the mass number 122(3.8±0.2); 123(−0.05±0.25−i·0.100); 124(7.95±0.10); 125(5.01±0.08); 126(5.55±0.07); 128 (5.88±0.07); 130(6.01±0.07).
the thermal absorption cross sections (in barn) for Sb(4.91±0.05);121Sb(5.77±0.12);123Sb(3.8±0.2); Te(4.05±0.05) and I(6.15±0.06).
The combination of the measured values of scattering lengths and -cross sections resulted in data for coherent and incoherent cross sections. Taking account of resonance data a complete set of spin state- and reconance scattering lengths has been obtained and discussed.
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Work partially supported by the Bundesministerium für Forschung und Technologie
We are thankful to Dr. M. Welland and Prof. Dr. J.E. Enderby for the preparation of Te-samples and Prof. K. v. Klitzing who left us the Te-monocrystal. The continuous assistance by the reactor staff and the financial support of the “Bundesministerium für Forschung und Technologie” are appreciated.
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Koester, L., Knopf, K. & Waschkowski, W. Interactions of slow neutrons with nuclides of antimony, tellurium and iodine. Z. Physik A - Atomic Nuclei 323, 359–365 (1986). https://doi.org/10.1007/BF01283794
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DOI: https://doi.org/10.1007/BF01283794