The funding of the ELI-NP project from Structural Funds was approved by the European Commission

News

.

.

  Research Activities - RA4 - Nuclear Physics and Applications with high-brilliance gamma-beams

The RA4 research activity aims at studies of nuclear structure, nuclear reactions and nuclear astrophysics with brilliant gamma beams at ELI-NP, as well as development of gamma-beam applications. A versatile research program related to physics and applications with brilliant gamma beams has been defined in several Technical Design Reports and instrumentation for its realization is been designed or is under construction. It includes nuclear resonance fluorescence (NRF) experiments, photoneutron reaction measurements, studies of (γ,α) or (γ,p) reaction cross sections and photofission experiments. Day-one experiments with the ELI-NP gamma-beam system will be carried out in the E2, E3 and E8 experimental areas of the ELI-NP laboratory building.

NRF experiments provide a specific research niche for the ELI-NP facility. In particular, the pencil-size gamma beams at ELI-NP will provide access to targets that are available in small quantities and will open the actinide region for NRF studies. Detailed high-resolution studies of the dipole strength distribution in the region of the pygmy dipole resonance (PDR) will be done. Related to this experimental program, the ELIADE detector array of segmented Ge Clover detectors and digital read-out is construction.

Experiments above the neutron threshold address open questions related to nuclear structure and astrophysical abundances of nuclear species, e.g. photodisintegration cross-sections for low-abundance nuclei relevant to the p-process nuclear synthesis, and nuclear structure of the giant dipole resonances (GDR) from studies of gamma and neutron decays, as well as studies of the pygmy-dipole resonance (PDR) and the magnetic dipole resonance (MDR), appearing as excess strength at the lower-energy tail of the GDR, will be performed. In addition, resolution of the large literature discrepancies of the partial (γ,xn) cross-sections with improved measurements will be done. Two main instruments are under construction related to this experimental program, the ELIGANT-GN detector array, consisting of large LaBr3(Ce), CeBr3 and liquid scintillators, for coincidence measurements of high-energy γ rays and neutrons, and the ELIGANT-TN detector array, consisting of 3He tubes embedded in polyethylene, for measurements of thermal neutrons.

Experiments in the field of photofission address mapping of the fission barriers through studies of transmission fission resonances, as well as studies of rare fission modes. For the realization of this experimental programme two instruments are designed, a four-fold array of double-armed, Frisch-gridded Bragg ionization chambers coupled to Si DSSD detectors, ELI-BIC, which will enable measurements of kinetic energy and mass-charge distributions of the fission fragments, and a 4π array of thick gas electron multipliers, ELITHGEM, which allows measurements of angular distributions of fission fragments.

At ELI-NP we develop a research program for studies of the structure of exotic nuclei. The nuclei of interest will be produced by photofission of actinide nuclei by a broad-bandwidth gamma beam, covering the region of the GDR. For separation, manipulation and experiments with the fission fragments of interest, an IGISOL-type of facility is proposed to be built.

Charge-particle detection experiments at ELI-NP focus at forefront research in nuclear astrophysics. Several key astrophysics reactions are considered, such as e.g. the 16O(γ,α)12C, which will allow understand the time-reversed process 12C(α, γ)16O using the detailed balance. For these studies two instruments are under construction, the 4π ELISSA array, consisting of Si strip detectors, and a time-projection chamber with electronic read-out, ELI-eTPC.


ELI-NP γ beams will be used to produce intense beams of positrons. The positron beams will be utilized for material research and characterization, for structural and defect studies of metals, semi-conductors and insulators. Accordingly, several analytical techniques will be used and further developed. Once circularly polarized gamma beams become available at ELI-NP, they will be used to produce polarized positron beams. Thus, ELI-NP will offer positron beams with unprecedented capabilities.

NRF analytical techniques and γ-ray based radiography and tomography will be developed at ELI-NP. These studies will be directed towards specific nuclear non-proliferation and waste-management applications, as well as cultural heritage research. In addition, research related to the production of radioisotopes for medical applications will be carried out ELI-NP. For this purpose and irradiation station, combined with pneumatic transport system, is designed.

In short, the unique parameters of the ELI-NP gamma beams in terms of high spectral density and high polarizability open a new avenue for photonuclear research.

Staff

Dimiter BALABANSKI   Head of RA4 - Research Scientist I   CV / Publications
Dan FILIPESCU   RA4 deputy - Research Scientist II   CV / Publications
Catalin MATEI   RA4 deputy - Research Scientist II   CV / Publications
Andreas OBERSTEDT   Research Scientist I   CV / Publications
Nikolay DJOURELOV   Research Scientist II   CV / Publications
Victor LECA   Research Scientist II   CV / Publications
Paul CONSTANTIN   Research Scientist III   CV / Publications
Phan Viet CUONG   Research Scientist III   CV / Publications
Danilo GAMBACURTA   Research Scientist III   CV / Publications
Violeta IANCU   Research Scientist III   CV / Publications
Yifei NIU   Research Scientist III   CV / Publications
Gabriel SULIMAN   Research Scientist III   CV / Publications
Yi XU   Research Scientist III   CV / Publications
Deepika CHOUDHURY   Research Scientist   CV / Publications
Andreea OPRISA   Research Scientist   CV / Publications
Gheorghe CIOCAN   Engineer   CV / Publications
Tudor GLODARIU   Engineer   CV / Publications
Traian ROMAN   Engineer   CV / Publications
Anissa BEY   Postdoctoral Research Assistant  
Luigi CAPPONI   Postdoctoral Research Assistant  
Svetlana Gennadievna CHESNEVSKAYA   Postdoctoral Research Assistant  
Luca GUARDO   Postdoctoral Research Assistant  
Mateusz KRZYSIEK   Postdoctoral Research Assistant  
Asli KUSOGLU   Postdoctoral Research Assistant  
Dario LATTUADA   Postdoctoral Research Assistant  
Bo MEI   Postdoctoral Research Assistant  
Doru DINESCU   PhD Student  
Ioana GHEORGHE   PhD Student  
Filip Daniel PUICEA   PhD Student  
Dragos SEULEANU   PhD Student  
Vladimir ENE   PhD Student  
Andreea SERBAN   Master Student  

Previous members

Catalin BALAN   Postdoctoral Research Assistant   2015-2016
Jasmeet KAUR   Postdoctoral Research Assistant   2015-2016
Wen LUO   Postdoctoral Research Assistant   2015-2016
Zafar YASIN   Postdoctoral Research Assistant   2015-2016
Abdullah COBAN   PhD Student   2015-2016
Sevda COBAN   PhD Student   2015-2016
Tuan Anh LE   PhD Student   2015-2016
Dragos NICHITA   Summer internship student   2016
Teodora PETRUSE   Summer internship student   2016
Alexandra BROUGHTON   Summer internship student   2017
Thomas SANDERS   Summer internship student   2017
Alexander WRIGHT   Summer internship student   2017


.
.
The content of this document does not necessarily represent the official position of the European Union or of the Government of Romania.
For detailed information regarding the other programmes co-financed by the European Union please visit:
www.fonduri-ue.ro
.