Abstract
Coherent neutron scattering lengths and total cross sections have been measured for barium compounds and on isotopically enriched samples for neutron energies from 0.5 meV up to 132 eV using different techniques. From the experimental data the following quantities were obtained:
-
the coherent scattering lengths (in fm) of Ba (5.07±0.03) and of the isotopes with mass numbers 130 (−3.6±0.6); 132 (7.8±0.3); 134 (5.7±0.1); 135 (4.66±0.10); 136 (4.90 ±0.08); 137 (6.82±0.10); and 138 (4.83±0.08).
-
the absorption cross sections σγ (at 0.025 eV in barn): of Ba (1.1±0.1) and of the isotopes: 130 (30±5); 136 (0.68±0.17); 137 (3.6±0.2); and 138 (0.27±0.14).
-
zero-energy scattering cross sections for Ba and the isotopes 136, 137 and 138. On the basis of these data, the isotopic- and spin-incoherent cross sections and the (s)-resonance contributions to the coherent scattering lengths have been determined and discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Enderby, J.E., Neilson, G.W.: Adv. Phys.29, 323 (1980)
Strohmaier, B., Uhl, M., Matthes, W.K.: Nucl. Sci. Eng.65, 368 (1978)
Mughabghab, S.F., Divadeenam, M., Holden, N.E.: Neutron cross sections. Vol. 1, A. New York: Academic Press, INC 1981
Koester, L., Knopf, K., Waschkowski, W., Klüver, A.: Z. Phys. A — Atoms and Nuclei318, 347 (1984)
Gmelins Handbuch der organischen Chemie. 8. Aufl. Ergänzungsband 30. Weinheim: Verlag Chemie 1960
D'Ans Lax: Taschenbuch für Chemiker und Physiker. Bd. 1, 3th Edn. Berlin, Heidelberg, New York: Springer Verlag 1967
Koester, L., Knopf, K.: Z. Naturforsch.26a, 391 (1971)
Koester, L.: Neutron scattering lengths and fundamental neutron interactions. In: Springer Tracts in Modern Physics, Vol. 80, pp. 1–55. Berlin, Heidelberg, New York: Springer 1977
Koester, L., Knopf, K., Waschkowski, W.: Z. Phys. A -Atoms and Nuclei287, 612 (1978)
Dilg, W., Vonach, H.: Nucl. Instrum. Methods100, 83 (1972)
Waschkowski, W., Koester, L.: Z. Naturforsch.31a, 115 (1976)
Koester, L., Rauch, H., Herkens, M., Schröder, K.: Summary of neutron scattering lengths, Report JÜL-1755 (1981) Kernforschungsablage Jülich, D-5170 Jülich, FRG
Ahmad, A.: Ann. Nucl. Energy10, 41 (1983)
Koester, L., Knopf, K., Waschkowski, W.: Z. Phys. A -Atoms and Nuclei292, 95 (1979)
Garber, G.I., Kinsey, R.R.: BNL 325, 3rd Edn., Vol. II. Brookhaven Nat. Laboratory, Upton, New York (1976)
Seth, K.K., Hughes, D.J., Zimmerman, R.L., Garth, R.C.: Phys. Rev.110, 692 (1958). Data from the ENDF/B-IV Library
Koester, L., Waschkowski, W.: (to be published)
Author information
Authors and Affiliations
Additional information
Work partially supported by the Bundesministerium für Forschung und Technologie
The financial support of the “Bundesministerium für Forschung und Technologie” is appreciated. We thank the reactor staff for continuous assistance.