[en] A systematic investigation of alpha particle and proton emission following capture of thermal neutron has been performed at the ILL'S high flux reactor. The (nsub(th),α) reaction could be investigated among most of the stable nuclei and several radioactive one. Experimental results are presented on ³³S, ³⁷Ar, ⁴⁰K, ⁵⁹Ni, ⁶⁴Zn, ⁶⁵Zn, ⁶⁷Zn, ⁷⁷Se, ⁹³Mo, ⁹⁵Mo, ¹²³Te, ¹⁴³Nd, ¹⁴⁵Nd, ¹⁴⁷Sm, ¹⁴⁹Sm, ¹⁵¹Eu, ¹⁵⁵Gd, ¹⁶⁷Er, ¹⁷⁷Hf, ²³⁸U. A method has been proposed for calculation of the (n,α) cross section. This method has been tested on all the experimental results. Fluctuation of experimental values compared to theoretical one are those predicted by the statistical model. Moreover the very rare (nsub(th),p) reaction could be observed on the ³⁵Cl, ³⁷Ar, ⁴⁰K, ⁵⁹Ni, ⁷⁶Br, ⁸⁴Rb nuclei and the (n,γ-α) reaction has been investigated with ⁴⁰K, ¹⁴³Nd and ¹⁴⁹Sm samples

[en] A description is given of recent developments in the target facility at Argonne National Laboratory (ANL). Highlights include equipment upgrades which enable us to provide enhanced capabilities for support of the Argonne Heavy-Ion ATLAS Accelerator Project. Also, future plans and additional equipment acquisitions will be discussed. (orig.)

No abstract available

[en] The investigation and development of methods of preparation of nuclear targets which have been used for nuclear physics experiments at IMP since 1975 is described. Targets of more than 40 elements, including natural elements, enriched isotopes, lanthanides and actinides, have been produced. Equipment and procedures have been developed for many preparation methods such as electroplating, focused heavy-ion beam sputtering, centrifugal precipitation, rolling, electron bombardment, and resistance heating. The analysis of target films contaminated by oil vapor and the equipment for preparing thin, metallic self-supporting target foils without oil vapor contamination are also described. (orig.)

[en] The selection of the evaluated neutron activation cross-sections for inclusion into IRDF-2002 depends in part on how well the various evaluations agree with the experimental data for thermal cross-sections, resonance integrals and near 14 MeV. Candidate evaluated neutron cross-section libraries included IRDF-90, JENDL/D-99, RRDF-98, ENDF/B-VI and JEFF-3.0. Differences between these evaluations were assessed by plotting the evaluated cross-sections together with the available experimental data in the 14 MeV region. Appendix IV contains the plots for all of the reactions considered for IRDF-2002. These comparisons were then used to identify any significant differences between the various evaluations that would affect the selection for IRDF-2002. Differences between the various evaluations were negligible in most cases, and no clear preference could be made based solely on the fit to the experimental data near 14 MeV. Detailed comments are provided for each of the reactions that were considered. It is important to note that this rapid and somewhat superficial evaluation of the experimental data and cross-section evaluations had the limited objective of aiding the selection of cross-section data for IRDF-2002. More detailed discussions of the data and cross-sections by the evaluators are readily available in the report section of each reaction in the cross-section libraries

[en] New updates to the RRDF-98 library were presented. Problems with the covariance matrix in previously submitted evaluations have been eliminated by using extended precision, which resolved the issue of negative Eigenvalues in some of the covariance matrices. A new ²³⁷Np(n, f) evaluation was also provided; this file does not yet have a File 1 comments section, but includes the data required to finalize the contents of the IRDF-2002 library. Several example cases were presented where excessive scatter in the experimental data had been resolved by carefully tracing the standards used by the experimenter and re-normalizing the data using the current best estimates of the reference standard cross sections. This renormalization required that Zolotarev track down the experimental details, often contacting the actual experimenters since details were not provided in their written documentation. Cases were shown where the resulting re-normalization procedure dramatically collapsed the spread in the experimental data. Some of Zolotorev's tables have the latest RRDF-98 contributions labelled as IRDF-2002 evaluations. Since the final IRDF-2002 library contents will not be decided until the end of this meeting, these contributions will be relabeled Updated RRDF-98. Zsolnay expressed the views of the whole meeting when she thanked Zolotarev for his extensive contributions to this DDP, and for his quick response to requests to resolve the issues that arose from the reviews. The issue of adding cumulative fission yields to the IRDF-2002 library was discussed since these data are part of the database required in using the new dosimetry cross sections. Trkov noted that the IAEA has an on-going project that addresses this need, but the results will not be available within the timeframe of the IRDF-2002 release. The issue of the addition of fission yields to the IRDF-2002 library was set aside for consideration as part of any future revision

[en] Cross sections for the inclusive production of neutrons from reactions of 25 MeV protons with ⁵⁰⁵²⁵³Cr, ⁵⁴⁵⁶⁵⁸Fe, ⁵⁹Co, ⁶⁰Ni, ⁶³Cu, ⁸⁹Y, ^90919294Zr, ^{929495969798100}Mo, ¹¹⁰Pd and ¹⁵⁹Tb and of 18 MeV protons with ^90919294Zr have been measured with time-of-flight techniques for 16 angles between 3.5⁰ less than or equal to theta/sub lab/ less than or equal to 159.0⁰. After a short presentation of the motivations for these measurements, the experimental set up is discussed with emphasis on the systematic and statistical error sources pertinent to this work, in particular the question of background correction in the continuous parts of the spectra. The main purpose of this report is to make the experimental results of this work (angle integrated spectra, angular distributions) available for distribution, reducing thereby the data required in publication of the results of these experiments. 20 references

[en] Cross sections have been measured at Esub(n)=14.7+-0.3 MeV by the activation technique for thirty-three (n,2n), (n,p), (n,α) and (n,n'p) reactions on enriched isotopes of Ti, V, Cr, Fe and Ni. Some systematic trends observed in the data are discussed. Measurements have also been carried out on seventeen reactions induced by fast neutrons produced in the break-up of 30MeV deuterons. A comparison of these data with the 14MeV data is presented

[en] The elastic scattering of monochromatic photons in the 5 to 8MeV energy range by various targets (Bi, Pb, Hg, Tl, Ce, Sr, Y, Zr, Ni) is discussed

[en] The cross-sections of fifty-eight reactions of interest for nuclear technology applications have been measured by the activation method in our laboratory. For the same reactions, compilations and evaluations of available neutron activation cross-sections have been made. Table 1 lists all of the reactions included in the present work. A brief description of experimental measurements for activation cross-sections is given. The evaluation procedure is described. The collected data were modified as needed to account for recent revisions in nuclear constants and standard cross-sections. For each reaction, the data measured by ourselves and our evaluations are listed in Tables 3 and 4 respectively. A graphical intercomparison with available experimental data is given. References can be found for each investigated reaction. (author). Refs, figs and tabs