Chiral model for (K)over-barN interactions and its pole content
Cieplý, Aleš; Smejkal, J.
2010 - English We use chirally motivated effective meson-baryon potentials to describe the low energy (K) over barN data including the characteristics of kaonic hydrogen. Our results are examined in comparison with other approaches based on the unitarity and dispersion relation for the inverse of the T-matrix. We demonstrate that the movements of the poles generated by the model upon varying the model parameters can serve as a tool to get additional insights on the dynamics of the strongly coupled pi Sigma-(K) over barN system. Keywords: chiral Lagrangians; coupled channels; meson-baryon interactions Available at various institutes of the ASCR Chiral model for (K)over-barN interactions and its pole content

We use chirally motivated effective meson-baryon potentials to describe the low energy (K) over barN data including the characteristics of kaonic hydrogen. Our results are examined in comparison with ...

Cieplý, Aleš; Smejkal, J.
Ústav jaderné fyziky, 2010

Indirect measurement of O-17(p,alpha)N-14 cross section at ultra-low energies
Sergi, M. L.; Spitaleri, C.; Coc, A.; Mukhamedzhanov, A.; Burjan, Václav; Cherubini, S.; Crucilla, V.; Gulino, M.; Hammache, F.; Hons, Zdeněk; Irgaziev, B.; Kiss, G. G.; Kroha, Václav; La Cognata, M.; Lamia, L.; Pizzone, R. G.; Puglia, S. M. R.; Rapisarda, G. G.; Romano, S.; de Sereville, N.; Somorjai, E.; Tudisco, S.; Tumino, A.
2010 - English The indirect measurement of O-17(p,alpha)N-14 cross section was performed by means of the Trojan Horse Method. This approach allowed to investigate the ultra-low energy range (E-c.m.= 0-300 keV) relevant for several astrophysics environments, where two resonant levels of F-18 at E-c.m.(R) = 65 keV and E-c.m.(R) = 183 keV play a significant role in the reaction rate determination. Keywords: astrophysics; nuclear reaction; reaction rates Available at various institutes of the ASCR Indirect measurement of O-17(p,alpha)N-14 cross section at ultra-low energies

The indirect measurement of O-17(p,alpha)N-14 cross section was performed by means of the Trojan Horse Method. This approach allowed to investigate the ultra-low energy range (E-c.m.= 0-300 keV) ...

Sergi, M. L.; Spitaleri, C.; Coc, A.; Mukhamedzhanov, A.; Burjan, Václav; Cherubini, S.; Crucilla, V.; Gulino, M.; Hammache, F.; Hons, Zdeněk; Irgaziev, B.; Kiss, G. G.; Kroha, Václav; La Cognata, M.; Lamia, L.; Pizzone, R. G.; Puglia, S. M. R.; Rapisarda, G. G.; Romano, S.; de Sereville, N.; Somorjai, E.; Tudisco, S.; Tumino, A.
Ústav jaderné fyziky, 2010

Revize metod stanovení 89Sr a 90Sr pro potřeby monitorování radiační situace JE
Světlík, Ivo; Tomášková, Lenka; Megisová, Natália; Wagnerová, Markéta; Ryska, František
2010 - Czech Keywords: 14C; 3H; nuclear power plants; stack air Available at various institutes of the ASCR Revize metod stanovení 89Sr a 90Sr pro potřeby monitorování radiační situace JE

Světlík, Ivo; Tomášková, Lenka; Megisová, Natália; Wagnerová, Markéta; Ryska, František
Ústav jaderné fyziky, 2010

Vyhodnocení úrovně ozáření posádek letadel společnosti Travel Service, a.s. za rok 2009
Kovář, Ivan; Malušek, Alexandr; Orčíková, Hana; Spurný, František
2010 - Czech Keywords: individual dosimetry; aircrew exposure; radiation transport codes Available at various institutes of the ASCR Vyhodnocení úrovně ozáření posádek letadel společnosti Travel Service, a.s. za rok 2009

Kovář, Ivan; Malušek, Alexandr; Orčíková, Hana; Spurný, František
Ústav jaderné fyziky, 2010

Astrophysical Reaction Rates Obtained By Indirect Techniques
Tribble, R. E.; Al-Abdullah, T.; Alharbi, A.; Aysto, J.; Banu, A.; Burjan, Václav; Carstoiu, F.; Chen, X.; Clark, H. L.; Davidson, T.; Fu, C.; Gagliardi, C. A.; Hardy, J. C.; Iacob, V. E.; Jokinen, J.; Kroha, Václav; Lui, Y. W.; McCleskey, M.; Mukhamedzhanov, A.; Nica, N.; Park, H.; Roeder, B. T.; Saastamoinen, A.; Simmons, E.; Tabacaru, G.; Tokimoto, Y.; Trache, L.; Woods, P. J.; Zhai, Y.
2010 - English ndirect techniques have been used to obtain information about reaction rates for several proton capture reactions that occur on short-lived nuclei. The techniques used to carry out the measurements are reviewed and the results obtained are presented. Also future prospects for further measurements with a new facility, T-REX, are discussed. Keywords: nuclear astophysics; explosive nucleosynthesis; proton capture Available at various institutes of the ASCR Astrophysical Reaction Rates Obtained By Indirect Techniques

ndirect techniques have been used to obtain information about reaction rates for several proton capture reactions that occur on short-lived nuclei. The techniques used to carry out the measurements ...

Tribble, R. E.; Al-Abdullah, T.; Alharbi, A.; Aysto, J.; Banu, A.; Burjan, Václav; Carstoiu, F.; Chen, X.; Clark, H. L.; Davidson, T.; Fu, C.; Gagliardi, C. A.; Hardy, J. C.; Iacob, V. E.; Jokinen, J.; Kroha, Václav; Lui, Y. W.; McCleskey, M.; Mukhamedzhanov, A.; Nica, N.; Park, H.; Roeder, B. T.; Saastamoinen, A.; Simmons, E.; Tabacaru, G.; Tokimoto, Y.; Trache, L.; Woods, P. J.; Zhai, Y.
Ústav jaderné fyziky, 2010

Indirect Approach To The H-2(d,p)H-3 Reaction Study
Sparta, R.; Pizzone, R. G.; Spitaleri, C.; Aliotta, M.; Burjan, Václav; Cherubini, S.; Crucilla, V.; Gulino, M.; Hons, Zdeněk; Kiss, G. G.; Kroha, Václav; La Cognata, M.; Lamia, L.; McCleskey, M.; Mrázek, Jaromír; Puglia, S. M. R.; Rapisarda, G. G.; Romano, S.; Sergi, M. L.; Trache, L.; Tumino, A.
2010 - English In order to understand primordial and stellar nucleosynthesis, we have studied H-2(d,p)H-3 reaction at 0.4 MeV down to astrophysical energies. Knowledge of its S-factor is interesting also to plan reactions for fusion reactors to produce energy. The H-2(d,p)H-3 reaction has been studied through the Trojan Horse Method applied to the three-body reaction H-2(He-3,pt)H, at beam energy of 17 MeV. Once selection of protons and tritons detected in coincidence and the selection of quasi-free events, the obtained S-factor is compared with direct measurements. Such data are in agreement with the direct ones and a pole invariance test has been obtained comparing the present results with another H-2(d,p)H-3 THM measurements, where a different spectator particle was employed. Keywords: nuclear astrohphysics; Trojan Horse; Big Bang nucleosynthesis Available at various institutes of the ASCR Indirect Approach To The H-2(d,p)H-3 Reaction Study

In order to understand primordial and stellar nucleosynthesis, we have studied H-2(d,p)H-3 reaction at 0.4 MeV down to astrophysical energies. Knowledge of its S-factor is interesting also to plan ...

Sparta, R.; Pizzone, R. G.; Spitaleri, C.; Aliotta, M.; Burjan, Václav; Cherubini, S.; Crucilla, V.; Gulino, M.; Hons, Zdeněk; Kiss, G. G.; Kroha, Václav; La Cognata, M.; Lamia, L.; McCleskey, M.; Mrázek, Jaromír; Puglia, S. M. R.; Rapisarda, G. G.; Romano, S.; Sergi, M. L.; Trache, L.; Tumino, A.
Ústav jaderné fyziky, 2010

Spectroscopy of Medium-mass Hypernuclear Production
Motoba, T.; Bydžovský, Petr; Sotona, Miloslav; Itonaga, K.; Ogawa, K.; Hashimoto, O.
2010 - English Theoretical hypernuclear photoproduction spectra are demonstrated by choosing typical medium-heavy nuclear targets such as Si-28, Ca-40, and Cr-52. The predictions provide us with interesting opportunities of spectroscopic study beyond p-shell on the dynamical coupling between a hyperon and nuclear core excitations. Keywords: hypernuclear photoproduction; DWIA; unnatural parity states Available at various institutes of the ASCR Spectroscopy of Medium-mass Hypernuclear Production

Theoretical hypernuclear photoproduction spectra are demonstrated by choosing typical medium-heavy nuclear targets such as Si-28, Ca-40, and Cr-52. The predictions provide us with interesting ...

Motoba, T.; Bydžovský, Petr; Sotona, Miloslav; Itonaga, K.; Ogawa, K.; Hashimoto, O.
Ústav jaderné fyziky, 2010

Vyhodnocení úrovně ozáření posádek letadel společnosti Grossmann Jet Service, s.r.o. za rok 2009
Kovář, Ivan; Malušek, Alexandr; Orčíková, Hana; Spurný, František
2010 - Czech Keywords: individual dosimetry; aircrew exposure; radiation transport codes Available at various institutes of the ASCR Vyhodnocení úrovně ozáření posádek letadel společnosti Grossmann Jet Service, s.r.o. za rok 2009

Kovář, Ivan; Malušek, Alexandr; Orčíková, Hana; Spurný, František
Ústav jaderné fyziky, 2010

Influence of Plastic Deformation on the Residual Stress Distribution and Fatigue Behaviour of High Strength Steels Welds
Mráz, Ľ.; Karlsson, L.; Hamak, I.; Mikula, Pavol; Vrána, Miroslav
2010 - English The effects of plastic deformation and cyclic loading on residual stress distribution have been studied at welds in high strength 800 MPa steel. Effects of residual stress levels on fatigue life are also presented. Tensile loading was used to induce precisely controlled plastic deformation at weld toes. Residual stress distributions were measured by neutron diffraction. The influence of fatigue loading on the residual stress level was much smaller than that of plastic deformation. A large drop of residual stresses in the vicinity of the welds was recognised after local straining at the level of 2%. Stresses decreased with up to 550 MPa in the region around the weld toe. The effect of local plastic deformation on fatigue properties was also found to be significant. Fatigue strength more than doubled compared to the non-strained as-welded condition. Keywords: neutron diffraction; residual stress Available at various institutes of the ASCR Influence of Plastic Deformation on the Residual Stress Distribution and Fatigue Behaviour of High Strength Steels Welds

The effects of plastic deformation and cyclic loading on residual stress distribution have been studied at welds in high strength 800 MPa steel. Effects of residual stress levels on fatigue life are ...

Mráz, Ľ.; Karlsson, L.; Hamak, I.; Mikula, Pavol; Vrána, Miroslav
Ústav jaderné fyziky, 2010

Geometric Versus Spectral Convergence for the Neumann Laplacian under Exterior Perturbations of the Domain
Arrieta, J. M.; Krejčiřík, David
2010 - English This chapter is concerned with the behavior of the eigenvalues and eigenfunctions of the Laplace operator in bounded domains when the domain undergoes a perturbation. It is well known that if the boundary condition that we are imposing is of Dirichlet type, the kind of perturbations that we may allow in order to obtain the continuity of the spectra is much broader than in the case of a Neumann boundary condition. This is explicitly stated in the pioneer work of Courant and Hilbert [CoHi53], and it has been subsequently clarified in many works, see [BaVy65, Ar97, Da03] and the references therein among others. See also [HeA06] for a general text on different properties of eigenvalues and [HeD05] for a study on the behavior of eigenvalues and in general partial differential equations when the domain is perturbed. Keywords: eigenvalues; Laplace operator; Dirichlet condition Available at various institutes of the ASCR Geometric Versus Spectral Convergence for the Neumann Laplacian under Exterior Perturbations of the Domain

This chapter is concerned with the behavior of the eigenvalues and eigenfunctions of the Laplace operator in bounded domains when the domain undergoes a perturbation. It is well known that if the ...

Arrieta, J. M.; Krejčiřík, David
Ústav jaderné fyziky, 2010