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Data for Atomic Spectroscopy

#1358


Atomic Data: Photon Absorption, Electron Scattering, Vacancy Decay

Tech Area / Field

  • PHY-ANU/Atomic and Nuclear Physics/Physics

Status
8 Project completed

Registration date
20.09.1998

Completion date
13.10.2004

Senior Project Manager
Glazova M B

Leading Institute
Russian Academy of Sciences / Physical Technical Institute, Russia, St Petersburg

Supporting institutes

  • Institute of General and Inorganic Chemistry (IONKh), Russia, Moscow\nKurchatov Research Center, Russia, Moscow

Collaborators

  • Universität Hamburg / Institut für Experimentalphysik, Germany, Hamburg\nGeorgia State University / Depatment of Chemistry, USA, GA, Atlanta\nImperial College of Science, Technology and Medicine / Blackett Laboratory, UK, London\nCentral Laboratory of the Research Councils, UK, Warrington\nUniversita di Perugia, Italy, Perugia\nFritz-Haber-Institut der Max-Plank-Gesellschaft, Germany, Berlin

Project summary

The authors of the project have layed the foundation for the many-electron theory of photoionization and developed the computer software package ATOM, thus making it possible to calculate the photoelectron spectra parameters, which are essential in obtaining from these spectra information about the electron structure and the constitution of the compounds. The essentials of the developing approach were published in several books in Russia and in other countries.

In recent years the authors of the proposal have performed a lot of calculations of photoionization characteristics and have developed new methods for the calculation of the atomic vacancies structure. Corresponding results are published in periodic literature and they will comprise the foundation of the theoretical part of the project. The set of the developed and developing theoretical approaches and data obtained while fulfilling the project is aimed at the investigation of heavy element (including radioactive) compounds.

The authors of the project carried out a series of measurements of the photoelectron spectra of heavy elements (lanthanide and actinides) compounds. A major part of these results was published in special Russian editions and the access of Western scientists to these results is very limited. Nowadays the investigations of heavy elements (including radioactive) are carried out in several countries, including Russia, USA, France and Germany. In particular, these investigations are directed at the solution of the ecological problems, connected with the distribution of radioactive contamination in the environment and with the disastrous ejections. The spectroscopic data obtained and compiled in the framework of this project, and presented as a final report, will be of great importance for the scientists working in this field.

The investigation "Atomic data: photon absorption, electron scattering, vacancy decay" is presented as a proposal for the project. This project comprises the research in following directions:

1. Theoretical investigation of the many-electron features of the photoionization process. Different theoretical methods will be unified by using the Green's function approach. This will open the possibility to connect different theoretical problems which will be considered in the proposed project.

2. Performing calculations of different characteristics of the photoionisation process. In all cases the theoretical approaches will be accompanied by the descriptions of the computer programs (existing and to be developed in the project) and also by the results of calculations.

3. The analysis of the available spectra of lanthanide and actinide compounds and measurement of a great number of new ones and explanation of the features of their fine structure on the basis of theoretical methods and detection of the main regular features of these spectra.

The final report will be presented in a complete form and it will be possible to print it all or its part as a book.

A large set of theoretical and experimental data on the spectra of heavy elements (including radioactive ones) will be introduced into the final report making it a valuable reference source for the scientists working in electron spectroscopy and for those who has an experience in investigating of radioactive elements and intend to apply their knowledge to ecological problems using spectroscopic methods.

The results of the project may be applied to radio-ecological monitoring of the environment in regions with high contamination by radioactive compounds and also to spectroscopic investigations of physical-chemical forms of atoms with radioactive nuclei and of mechanisms and factors affecting the migration of radioactive compounds in the environment. The results of the project may be also useful for nuclear materials control by spectroscopic methods.


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