[en] Volume I of the Proceedings contains a wide range of topics related to gamma-ray spectroscopy. The tree main topics covered are: nuclear structure studies, capture reactions and statistical nuclear properties. 104 items are indexed separately for the INIS database. (K.A.)

[en] A new library comprising 30 thousand neutron capture gamma rays has been created by combining new measurements on natural elements from Budapest and literature data for all stable isotope targets. All energies and intensities are consistent in that they are based on the chlorine and nitrogen standards, respectively. Accurate neutron binding energies and thermal capture cross-sections could also be inferred for all cases where the level scheme is sufficiently complete. The new data can be used for nuclear structure investigations, reaction model calculations, and a number of applications, such as Prompt Gamma-ray Activation Analysis (PGAA)

[en] This second volume of the conference contains papers on Fundamental Physics, Nuclear Data, Practical Applications, and New Techniques and Facilities. 65 papers were indexed and abstracted individually for the INIS database. (R.P.)

[en] Neutron cross-section data are fundamental for the design of nuclear interrogation systems, the maintenance of nuclear materials and waste, and the understanding the consequences of nuclear catastrophe. Although a large body of nuclear data exists, it is often old, unreliable, or poorly determined. For several years we have collaborated, as part of an IAEA Coordinated Research Project, to precisely measure the partial thermal neutron gamma ray cross sections for all elements from hydrogen to uranium at the Budapest Reactor. These data will replace the unreliable tables of Lone et al [1], still widely in use, and will be published as an IAEA TECDOC

[en] A Monte Carlo simulation describing the processes taking place in the sample during isotope excited XRF analysis was developed. The method is suitable for tracing the origin of the detected photons, for the deconvolution of peaks and is based on a program that can run on a microcomputer. Good agreement was found between the simulated and the measured spectra of a coal sample containing 1% praseodymium. (author) 5 refs.; 5 figs

[en] The absolute intensities of 36 γ-rays in the energy range of 292-8579 keV from neutron capture in chlorine were remeasured at the Budapest cold neutron prompt gamma activation analysis facility. The 1% level of accuracy of the nitrogen standard was practically achieved for the relative intensity of most of the ³⁶Cl γ-rays, thus making chlorine a useful secondary standard for efficiency calibration of germanium detectors

[en] Prompt gamma neutron activation analysis is proposed as an instant, non-destructive method for the assay of uranium and also for the determination of ²³⁵U-enrichment. Measurements were performed in the thermal and the cold neutron beams at the Budapest Research Reactor. A beam chopper was used to collect the delayed decay gamma radiation from short-lived nuclides separately. Partial gamma ray production cross-sections have been determined for a set of capture prompt, fission prompt and decay gamma lines and compared to those from the literature. The proposed method is also compared to NAA and the passive gamma spectroscopy of natural uranium

[en] Two methods are presented for the prompt gamma activation analysis (PGAA) of samples in relatively thick containers. In the 'invisible container' method, the prompt gamma-radiation from the activated parts of the container can be suppressed in the spectrum. The target can be analyzed simultaneously with the shielding material, when the target signal in the spectrum is stronger. Uranium containing compounds were analyzed in lead capsules. (author)

[en] A new catalogue of subthermal neutron-induced prompt gamma rays has been created for 79 elements, from hydrogen to uranium (including fission), on the basis of recent measurements at the Budapest guided-neutron PGAA facility. New energy values have been measured using ³⁵Cl neutron-capture gamma rays, while the gamma-ray production cross-sections have been determined with respect to the ¹H thermal capture cross-section. The elemental data have been compared with thermal neutron-capture data for individual nuclides from the Evaluated Nuclear Structure Data File, ENSDF, hence isotope identifications could be made. The catalogue contains elemental spectra and a table with nearly 7000 gamma rays with relative intensity over 1% of the strongest line. The average accuracy is about 0.08 keV for energies and about 5% for cross-sections in the whole energy range, from about 40 keV to 11 MeV

[en] The Evaluated Gamma-ray Activation File (EGAF), a new database of prompt and delayed neutron capture g-ray cross sections, has been prepared as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project to develop a ''Database of Prompt Gamma-rays from Slow Neutron Capture for Elemental Analysis.'' Recent elemental g-ray cross-section measurements performed with the guided neutron beam at the Budapest Reactor have been combined with data from the literature to produce the EGAF database. EGAF contains thermal cross sections for ∼ 35,000 prompt and delayed g-rays from 262 isotopes. New precise total thermal radiative cross sections have been derived for many isotopes from the primary and secondary gamma-ray cross sections and additional level scheme data. An IAEA TECDOC describing the EGAF evaluation and tabulating the most prominent g-rays will be published in 2004. The TECDOC will include a CD-ROM containing the EGAF database in both ENSDF and tabular formats with an interactive viewer for searching and displaying the data. The Isotopes Project, Lawrence Berkeley National Laboratory continues to maintain and update the EGAF file. These data are available on the Internet from both the IAEA and Isotopes Project websites