Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 5

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  25.20.-x
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Theoretical Photoneutron Cross Sections and the Effect of Gamma Strength Functions for W, Ag, Nb

100%
Karpuz Demır N., Çetın B.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 3
1076-1079
EN
In nuclear reactions the usage of high energy gamma particles, as projectiles, has some essential advantages for studying of nuclear structure and reaction mechanisms. In this work, (γ,n) reaction cross sections of ¹⁸⁶W, ¹⁰⁷Ag and ⁹³Nb have been calculated with TALYS 1.6 nuclear reaction simulation code. The main aim of this study is to investigate the effects of preequilibrium and the gamma strength functions on ¹⁸⁶W, ¹⁰⁷Ag and ⁹³Nb. The calculated results have been discussed and compared with the experimental data.
2
Content available remote

Calculation of Gamma Strength Functions for Photonucleon Reactions

100%
Karpuz N., Mavi B., Akkurt İ.
Acta Physica Polonica A
|
2015
|
vol. 128
|
issue 2B
B-414-B-416
EN
The cross section for (γ,N) reaction is important for investigation of nuclear structure, especially in low-energy giant dipole resonance (GDR). The total cross sections of ^{12}C(γ,n)^{11}C and ^{12}C(γ,p)^{11}B reactions, calculated using TALYS 1.2 nuclear code, are 15.5 to 40 MeV and 15 to 110 MeV, respectively. In the calculations, the default pre-equilibrium models and Brink-Axel Lorentzian model in all of the gamma strength functions have been used. The effects of the gamma strength function on the cross section exchange data has determined the most compatible model type. The results are compared with the experimental data from the EXFOR database and the evaluated nuclear data from TENDL-2012. Our calculated results are in good agreement with the previously reported experimental results.
3
Content available remote

Cross Sections Calculation of (γ,N) Reactions for Some Elements

100%
Karpuz N., Boz M., Mavi B., Akkurt I.
Acta Physica Polonica A
|
2015
|
vol. 128
|
issue 2B
B-411-B-413
EN
Photonuclear processes can play an important role in the detection of nuclear materials. For this purpose, in this study, the (γ,n) and (γ,p) cross sections as functions of photon energy in medium weight nuclei were calculated. Calculations have been made of the cross sections for some of the (γ,n) and (γ,p) reactions in ^{28}Si, ^{32}S, ^{56}Fe and ^{63}Cu nuclei using the TALYS 1.6 nuclear code with incident photons of 7-40 MeV. These calculated cross sections are compared with each other and with the earlier experimental results from the literature (EXFOR). Calculated results (^{56}Fe(γ,n), ^{63}Cu(γ,n), ^{56}Fe(γ,p) and ^{63}Cu(γ,p) cross sections) are in very good agreement with the experimental data. However, because of the Coulomb barrier, the photoproton cross sections for ^{32}S, ^{56}Fe and ^{63}Cu target nuclei, are smaller than the photoneutron cross sections.
4
Content available remote

Variation of Photoneutron Cross Section with Mass Number

100%
Karpuz N., Boz M., Mavi B., Akkurt I.
Acta Physica Polonica A
|
2015
|
vol. 128
|
issue 2B
B-409-B-410
EN
Photonuclear reactions play an important role in many different subfields of nuclear astrophysics, and fields, such as nucleosynthesis applications. The photonuclear reaction cross sections, especially the photoneutron reaction cross sections, are the fundamental properties of nuclear systems. In this study, theoretical evaluation of photoneutron reaction cross sections for 27 ≤ A ≤ 238 targets (^{27}Al, ^{96}Mo, ^{181}Ta, ^{238}U) have been investigated in the incident photon energy range of 7-35 MeV. Monte Carlo code TALYS 1.6 was used to calculate the photoneutron cross sections. The results are compared with the earlier experimental reports in literature and the cross section data in the TENDL-2013 nuclear reaction data library, based on subsequent versions of the TALYS nuclear code system. The photoneutron cross section results and the effects of the mass number of target nuclei are discussed.
5
Content available remote

Photoactivation Analysis of Mineral Trioxide Aggregate: Preliminary Results

100%
Eke C., Er K., Segebade C., Boztosun I.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 3
869-871
EN
The purpose of this study is to qualitatively analyse the elemental components of a mineral trioxide aggregate material using photoactivation. The material was irradiated for two hours using bremsstrahlung photons with an end-point energy of 18 MeV from a clinical electron linear accelerator. After irradiation the gamma-ray emission of the sample was counted by gamma spectrometry using a high-purity germanium (HPGe) detector. The gamma-ray spectra were analyzed by computer software. Major and trace elements were detected.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.