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Projects / Programmes source: ARIS

Astroparticle Physics

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Periods
January 1, 1999 - December 31, 2003
Research activity

Code Science Field Subfield
1.02.00  Natural sciences and mathematics  Physics   

Code Science Field
P210  Natural sciences and mathematics  Elementary particle physics, quantum field theory 
P211  Natural sciences and mathematics  High energy interactions, cosmic rays 
P520  Natural sciences and mathematics  Astronomy, space research, cosmic chemistry 
T181  Technological sciences  Remote sensing 
P250  Natural sciences and mathematics  Condensed matter: structure, thermal and mechanical properties, crystallography, phase equilibria 
P230  Natural sciences and mathematics  Atomic and molecular physics 
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (3)
no. Code Name and surname Research area Role Period No. of publications
1.  08387  PhD Iztok Arčon  Physics  Researcher  2001 - 2003  0 
2.  08308  PhD Danilo Zavrtanik  Physics  Head  2001 - 2003  0 
3.  19313  PhD Vida Žigman  Physics  Researcher  2001 - 2003  0 
Organisations (1)
no. Code Research organisation City Registration number No. of publications
1.  1540  University of Nova Gorica  Nova Gorica  5920884000  0 
Abstract
Research in the field of astroparticle physics has introduced new insight in the physics of elementary particles at energies, which will not be available at terrestrial accelerators in a foreseeable future. Main emphasis is given on the measurements of cosmic rays with energies above 1020 eV whose sources are still unknown, and on the search of new elementary particles at energies around 1011 eV. The work will be performed within international collaborations Pierre Auger and DELPHI. Cosmic rays (protons, nuclei, electrons and photons) with energies above 1020 eV have a very short mean free path (on a cosmological scale) due to the interaction with 2.7 K cosmic background, so their sources must be closer than 150 million light years from the earth. However, there are no known astrophysical objects within this range, which could accelerate particles to such energies. Understanding of such phenomena can lead to new discoveries in astrophysics as well as in particle physics. The aims of this research project are: - to identify astrophysical sources of extremely high energy cosmic rays and explain mechanisms for their acceleration; - describe physical processes in the interaction of cosmic rays in the atmosphere; - search for possible new elementary particles and interactions at energies above 1011 eV; - identify new physical phenomena at energies unavailable to experimental studies at present particle accelerators. Within P. Auger collaboration two large observatories will be constructed for the detection of extensive showers of particles, produced by the interaction of high energy cosmic rays with the atmosphere. Each observatory will be composed of surface detector array and fluorescence detectors. The surface detector with 1500 water Čerenkov counters, distributed on a surface of 3000 km2, will detect the density of elementary particles in the shower on the ground, while the fluorescence detector will monitor longitudinal development of the shower in the atmosphere. Present work is devoted to computer simulation of air-showers, development of a laser system (LIDAR) for remote monitoring the atmospheric parameters for the fluorescence detectors and development of the on-line system for data acquisition. Within the framework of DELPHI collaboration we will continue the search for new elementary particles like Higgs boson or supersymmetric particles in the energy range of electron-positron collider (LEP) at CERN. We will use the synchrotron radiation generated by high-energy positrons or electrons in particle accelerators and storage rings to study the intra-atomic effects accompanying the photoabsorption of electromagnetic radiation in free and embed atoms. The results will be used in the structural studies of new materials with EXAFS. We will develop new method to separate structural signal (EXAFS) in x-ray absorption spectra from the atomic absorption background, which will eliminate the systematic errors introduced by present heuristic approaches. Improved EXAFS method will be used in the analysis of the atomic structure of new materials, especially in amorphous and liquid phases and in gasses, in nanostructural materials and dopants in crystalline phases.
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