[en] Identical sample packets, each containing samples of elemental copper, silver, europium, terbium, and hafnium, as well as titanium, iron and nickel as dosimeters, have been irradiated in three distinct accelerator neutron fields (at Argonne National Laboratory and Los Alamos National Laboratory in the U.S.A., and Japan Atomic Energy Research Institute, Tokai, Japan) as part of an interlaboratory research collaboration to search for the production of long-lived radionuclides for fusion waste disposal applications. This paper is a progress report on this project. To date, we have detected the following activities, and have obtained preliminary experimental cross section values for several of these: Ag-106m,108m,110m; Eu-150m,152g,154; Tb-158,160; and Hf-175,178m2,179m2,181. (author). 11 refs, 1 fig., 4 tabs

[en] Short communication

[en] Cross sections for the reactions ⁵²Cr(n,2n)⁵¹Cr, ⁶⁶Zn(n,2n)⁶⁵Zn, ⁸⁹Y(n,2n)⁸⁸Y and ⁹⁶Zr(n,2n)⁹⁵Zr were measured in the energy range 13.47 MeV to 14.79 MeV applying the activation technique. Energy of neutrons produced via the T(d,n)⁴He reaction was changed by the emission angle. The neutron fluences and energies incident on the samples were determined by the measurements of the ^92mNb and ⁸⁹Zr specific activities produced in the ⁹³Nb(n,2n) and ⁹⁰Zr(n,2n) reactions. The induced γ-ray activities of the irradiated Cr, Zn, Zr ahd Y₂O₃ samples and their monitor foils were measured by means of calibrated Ge(Li) and NaI well-type γ-ray detectors. The results compared to the corresponding data in the literature show that the uncertainties obtained in this work are considerably smaller in most cases than those given by other authors. (author). 57 refs, 5 figs, 2 tabs

[en] Topics included in this paper are the optical model, gamma-ray strength function, total and exciton level-density theories and the pre-compound model used for the calculation of neutron activation cross sections. 14 refs

[en] The cross sections of the reactions producing long-lived nuclides: ¹⁰⁸Ag, ¹⁵⁰Eu, and ¹⁵²Eu have been measured at neutron energy about 14 MeV. An activity of irradiated samples was measured with a Ge(Li)-detector. Isotopically pure samples were used. (author). 10 refs, 3 figs, 3 tabs

[en] The cross sections for the production of isomeric states in the reactions ¹⁷⁹Hf(n,2n)^178m2Hf, ¹⁸⁰Hf(n,2n)^179m2Hf, ¹⁷⁹Hf(n,n')^179m2Hf with 14 MeV neutrons have been measured and compared with the theoretical ones. 4 refs, 3 figs, 4 tabs

[en] Activation cross-sections have been measured for some isotopes of the elements in Tl₂Ca₁Ba₂Cu₂O₈ high T_c superconducting oxide. In addition, cross-sections for producing long-lived isotopes in Cu and Ag were also determined. Results for the following reactions were given at E_n = 14.5 MeV: ⁶³Cu(n,α)^60gCo, ⁹⁰Zr(n,2n)⁸⁹Zr, ¹⁰⁷Ag(n,2n)^106mAg, ¹⁰⁹Ag(n,2n)^108mAg, ¹³⁴Ba(n,2n)^133gBa, ¹³⁴Ba(n,p)^134gCs, ¹³⁶Ba(n,p)¹³⁶Cs, ¹³⁷Ba(n,p)¹³⁷Cs and ²⁰³Tl(n,2n)²⁰²Tl. Results are compared to the corresponding data published in the literature and given by systematics. (author). 9 refs, 1 fig., 2 tabs

[en] The cross sections for ¹⁰⁹Ag(n,2n)^108mAg, ¹⁵¹Eu(n,2n)^150mEu, ¹⁵³Eu(n,2n)^152gEu and ¹⁵⁹Tb(n,2n)¹⁵⁸Tb reactions have been measured by the activation method at 14 MeV. The results were compared with existing data and calculations of systematic and Code HFTT which was based on the compound nucleus evaporation model and the preequilibrium exciton model. (author). 14 refs, 6 figs, 4 tabs

[en] A systematic investigation was carried out on ¹¹⁵In isotope to determine the contribution of different reactions to the total non-elastic cross-section in the 13.43 and 14.84 MeV range. All the major component cross-sections of σ_NE were measured with exception of the σ^g(n,n'). In the knowledge of σ_NE, the energy dependence of σ^g(n,n') could be deduced. The isomeric cross section ratios both for (n,2n) and (n,n') processes were also determined in the given energy range. The present experiment proves the dependence of σ^m/(σ^g+σ^m) ratio on the spin value (I_m) of the isomeric state in (n,2n) reaction. Excitation functions of (n,2n), (n,n') and (n,ch) reactions were compared with results calculated by STAPRE code. (author). 37 refs, 5 figs, 4 tabs

[en] The proceedings contain the progress reports of the Coordinated Research Programme to measure and evaluate the activation cross sections for the generation of long-lived radionuclides of importance in fusion reactor technology and the contributed papers (9) presented at the Consultants' Meeting held at Argonne National Laboratory between 11-12 September 1989. A separate abstract was prepared for each paper. Refs, figs and tabs