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National Repository of Grey Literature 4 records found  Search took 0.02 seconds. 
Studium fotonových silových funkcí z termálního záchytu neutronů
 Bauer, Karel ; Krtička, Milan (advisor) ; Cejnar, Pavel (referee)
This thesis deals with the description of $\gamma-$ray deexcitation of neutron resonances produced in thermal neutron capture below neutron separation energy. A subject of this thesis is obtaining information on absolute value of \textit{photon strength function} (PSF) achieved from primary transitions in thermal neutron capture. The aim is to map and bring new information on absolute value of photon strength function (PSF) in $^{156}$Gd and $^{158}$Gd. The method which was used in this thesis can lead to refusion of several models of PSF a level density. Powered by TCPDF (www.tcpdf.org)
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Studium fotonových silových funkcí z termálního záchytu neutronů
 Bauer, Karel ; Krtička, Milan (advisor) ; Cejnar, Pavel (referee)
A subject of this thesis is to gain information on absolute photon strength function below the neutron separation energy. This energy range is known as a "low-tail" energy region of E1 resonance. The absolute photon strength function is obtained by normalizing the total average intensity for several energy ranges to the average intensities from thermal neutron capture spectrum for which an absolute calibration is experimentally known. The absolute photon strength function is investigated by means of statistical method. Everything seems to be compatible with information on studied Gd isotopes. However, disclosed method can potentially lead to rejection of combination of PSF and LD models. Powered by TCPDF (www.tcpdf.org)
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Studium fotonových silových funkcí z termálního záchytu neutronů
 Bauer, Karel ; Krtička, Milan (advisor) ; Cejnar, Pavel (referee)
This thesis deals with the description of $\gamma-$ray deexcitation of neutron resonances produced in thermal neutron capture below neutron separation energy. A subject of this thesis is obtaining information on absolute value of \textit{photon strength function} (PSF) achieved from primary transitions in thermal neutron capture. The aim is to map and bring new information on absolute value of photon strength function (PSF) in $^{156}$Gd and $^{158}$Gd. The method which was used in this thesis can lead to refusion of several models of PSF a level density. Powered by TCPDF (www.tcpdf.org)
Detailed record
Study of photon strength functions from thermal neutron capture
 Bauer, Karel ; Krtička, Milan (advisor) ; Cejnar, Pavel (referee)
A subject of this thesis is to gain information on absolute photon strength function at gamma-ray energies around 4 - 8 MeV in two Gadolinium isotopes. This energy range is known as a ''low-energy'' tail region of E1 resonance. The absolute photon strength function is obtained from comparison of the sum of intensities of transitions and the number of transitions observed in thermal neutron capture on $^{155}$Gd and $^{157}$Gd with prediction from statistical model under various assumptions on photon strength functions and level densities. Powered by TCPDF (www.tcpdf.org)
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