[en] The IAEA Nuclear Data Section convened the 18th meeting of the International Network of Nuclear Structure and Decay Data Evaluators at the IAEA Headquarters, Vienna, 23 to 27 March 2009. This meeting was attended by 22 scientists from 14 Member States, plus IAEA staff, concerned with the compilation, evaluation and dissemination of nuclear structure and decay data. A summary of the meeting, recommendations/conclusions, data centre reports, and various proposals considered, modified and agreed by the participants are contained within this document. The International Network of Nuclear Structure and Decay Data (NSDD) Evaluators holds biennial meetings under the auspices of the IAEA, and consists of evaluation groups and data service centres in several countries. This network has the objective of providing up-to-date nuclear structure and decay data for all known nuclides by evaluating all existing experimental data. Data resulting from this international evaluation collaboration is included in the Evaluated Nuclear Structure Data File (ENSDF) and published in the journals Nuclear Physics A and Nuclear Data Sheets (NDS).

[en] Published in summary form only

[en] Three staff members are engaged in activities related to NSDD. The software tool LiveChart parses and transforms the ENSDF adopted levels and gamma datasets into a relational database. During the 2011-2012 period the decay datasets were also included. Plotting capabilities were expanded. For the next period the XUNDL files will be processed as well. ENSDF mass chain evaluations: update of most neutron deficient nuclides of A=148. Mass chain A=211 as an exercise of the IAEA-ICTP ENSDF workshop. Mass chain A=215 as an exercise of the VECC (Kolkata) ENSDD-2012 workshop. Mass chain A=144 to be submitted for review. Training: Joint IAEA-ICTP Workshop 'Nuclear Structure and Decay Data: Theory and Evaluation', ICTP, Trieste, 6-17 August 2012; ENSDD-2012 Workshop, VECC, Kolkata, 26-29 November 2012

[en] An overview of the fusion phenomenon below Coulomb barrier is presented. The current theoretical descriptions, emphasizing the relations with direct reactions are discussed. The definition and systematic behaviour of the fusion enhancement below the Coulomb barrier are also presented. The role of coupling to surface degrees of freedom, namely permanent deformations of nuclei, inelastic and transfer channels is shown. The importance of studies describing simultaneously quase-elastic processes and fusion are also shown. (M.C.K.)

[en] The IAEA Nuclear Data Section convened the 18th meeting of the International Network of Nuclear Structure and Decay Data Evaluators at the IAEA Headquarters, Vienna, 23 to 27 March 2009. This meeting was attended by 22 scientists from 14 Member States, plus IAEA staff, concerned with the compilation, evaluation and dissemination of nuclear structure and decay data. A summary of the meeting, recommendations/conclusions, data centre reports, and various proposals considered, modified and agreed by the participants are contained within this document. (author)

[en] The First Research Coordination Meeting (RCM) of the IAEA Coordinated Research Project (CRP) on 'Development of a Reference Database for Particle-Induced Gamma-ray Emission (PIGE) Spectroscopy' was held at the IAEA, Vienna, from 16-20 May 2011. A summary of the participants' presentations is given as well as background information, objectives and recommendations concerning approach and methodology. The extension of the IBANDL database format to include PIGE data was discussed. The different tasks to achieve the CRP objectives were assigned to participants. A list of priority measurements was produced and the individual sets of measurements assigned to participants. (author)

[en] We report on new estimates of the modulation expected in semiconductor detectors due to eclipsing of dark matter particles in the Earth. We reevaluate the theoretical modulation significances and discuss the differences found with previous calculations. We find that a significantly larger statistics than previously estimated is needed to achieve the same level of sensitivity in the modulated signal

[en] The analysis of elastic scattering cross sections in terms of the Optical Model is subject to a series of well known ambiguities. Diverse assumptions about the initial values or shape of the potentials frequently produce different parameters, leading to different physical interpretations of the observed data. It would be important to have a starting set of “user independent” optical potentials that fit the experimental data to allow the evaluator to consider a large array of possibilities before committing to a particular optical potential. This work presents a Genetic Algorithm (GA) code that simulates natural selection and evolution, allowing a “blind search” of the multiparametric χ² surface. In this GA, the genes subject to evolution are the parameters of the optical potential. The GA variables, operators and procedures are described, and the GA is applied to two cases in which the elastic scattering cross section is adjusted: one for the ⁷Li + ²⁷Al system at energies close to the Coulomb barrier where the interaction occurs near the nuclear surface, and another for the ¹⁶O + ¹⁶O system where the two nuclei deeply interpenetrate each other. Further developments are described.

[en] Mass chain A = 72 (12 nuclides) was evaluated in 2008-2009, and published in NDS 111 (2010), 1-140. Mass chain A = 144 (17 nuclides) is being evaluated. The interactive chart of nuclei has now new capabilities. Level plotting has been incorporated, and ground state properties such as nuclear radii and nuclear electric and magnetic moments have been introduced

[en] Experimental data on ground- and excited-state properties for all known nuclei with mass number A = 96 have been compiled and evaluated. States populated in radioactive decay, as well as in nuclear reactions, have been considered. For these nuclei, level and decay schemes, as well as tables of nuclear properties, are presented. This work supersedes the 1993 evaluation by L.K. Peker (1993Pe02). In summary, three isomers were identified in ⁹⁶Ag (2003Ba39,1997Gr02), even though the relative energies were not established. In ⁹⁶Ru a nuclear fluorescence experiment (2005Li59) determined the spin, branching ratios and transition strengths of dipole excitations; high-spin level properties were reported by 2000Kh02 and 2002Kl07. High spin levels in ⁹⁶Tc were studied in 2001Bu19. For ⁹⁶Mo, there are new high-spin data (2000Ch42), as well as low-spin levels produced in (n,n^'γ) (2007Le05) and (γ,γ^') (2004Fr30). High spin data (2005Pa48) were obtained for ⁹⁶Zr using heavy-ion induced fission. For ⁹⁶Sr, new levels were deduced using alpha-induced (2005Pa48) and spontaneous fission. The decay of a (10-) isomer in ⁹⁶Rb was studied by 2005Pi13. Several new mass measurements for neutron rich nuclides have been published, which were used to obtain Q-values and separation energies