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Experiments to determine the yields and bremsstrahlung flux-averaged cross-sections <${\sigma}(E_{{\gamma}max})$> of photonuclear reactions on the natural Mo targets were performed on the beam from the NSC KIPT electron linear accelerator…

With the advent of new photon tagging facilities and novel experimental technologies it has become possible to perform photoproduction cross section measurements of pseudoscalar mesons on nuclei with a percent level accuracy. The extraction…

High Energy Physics - Phenomenology · Physics 2009-11-10 S. Gevorkyan , A. Gasparian , L. Gan , I. Larin , M. Khandaker

Recent advances in the photon tagging facilities together with the novel, high resolution fast calorimetry made possible to perform photoproduction cross section measurements of pseudoscalar mesons on nuclei with a percent level accuracy.…

High Energy Physics - Phenomenology · Physics 2015-05-13 S. Gevorkyan , A. Gasparian , L. Gan , I. Larin , M. Khandaker

The cross sections for ({\gamma},xn) reactions at 30 MeV and 40 MeV bremsstrahlung end-point energies on natural rhenium (natRe) targets have been measured by the activation and the off-line {\gamma}-ray spectrometric techniques using a…

The photonuclear reactions which is induced by high-energetic photon are one of the important type of reactions in the nuclear structure studies. In this reaction, a target material is bombarded by photons with the energies in the range of…

Nuclear Theory · Physics 2020-03-18 Serkan Akkoyun , Hüseyin Kaya , Abdulkadir Şeker , Saliha Yeşilyurt

An extended database of experimental data is needed to address uncertainties of the nuclear-physics input parameters for Hauser-Feshbach calculations. Especially $\alpha$+nucleus optical model potentials at low energies are not well known.…

Nuclear Experiment · Physics 2015-03-18 L. Netterdon , J. Mayer , P. Scholz , A. Zilges

[Background] Alpha-nucleus optical potentials are basic ingredients of statistical model calculations used in nucleosynthesis simulations. While the nucleon+nucleus optical potential is fairly well known, for the alpha+nucleus optical…

Nuclear Experiment · Physics 2018-05-22 G. G. Kiss , T. Szucs , P. Mohr , Zs. Torok , R. Huszank , Gy. Gyurky , Zs. Fulop

Cross sections for the photon-induced particle-emission reactions (gamma,n), (gamma,p), and (gamma,alpha) are given for all natural isotopes from Ti to Bi. The target nuclei are assumed to be in their ground states, except for 180Ta which…

Nuclear Theory · Physics 2007-05-23 T. Rauscher , F. -K. Thielemann

The nuclear astrophysics setup at the Institute for Nuclear Physics, University of Cologne, Germany is dedicated to measurements of total and partial cross sections of charged-particle induced reactions at astrophysically relevant energies.…

Nuclear Experiment · Physics 2020-07-28 F. Heim , J. Mayer , M. Müller , P. Scholz , M. Weinert , A. Zilges

Differential cross sections two-body ($\gamma,p$) and ($\gamma,n$) reactions of the $^4$He nucleus disintegration were measured using the bremsstrahlung beam of photons at the KIPT linac LEA-300 at the maximum energy ${\rm…

The cross section averaged over 235U thermal-neutron induced fission spectrum is a fundamental quantity that can be used in evaluation and validation of nuclear data. Many experiments focused on the determination of Spectrum Averaged Cross…

Activation cross sections of proton induced nuclear reactions on palladium were measured up to 80 MeV by using the stacked foil irradiation technique and gamma ray spectrometry. The beam intensity, the incident energy and the energy…

Nuclear Experiment · Physics 2019-08-13 F. Tárkányi , F. Ditrói , S. Takács , J. Csikai , A. Hermanne , S. Uddin , M. Baba

Astrophysical reaction rates, which are mostly derived from theoretical cross sections, are necessary input to nuclear reaction network simulations for studying the origin of $p$ nuclei. Past experiments have found a considerable difference…

In this work, we present new data on the $^{197}$Au photoneutron reactions in and above the giant dipole resonance region, obtained by using 8 to 39~MeV quasi-monochromatic $\gamma$-ray beams produced at the NewSUBARU facility in Japan and…

The total bremsstrahlung flux-averaged cross-sections <$\sigma$(E$_{{\gamma}max}$)> for the photonuclear reactions $^{nat}$Ni($\gamma$,xn)$^{57}$Ni and $^{nat}$Ni($\gamma$,xn)$^{56}$Ni have been measured in the range of end-point energies…

In this paper we propose a new method for measuring the cross section of low yield nuclear reactions by capturing the products in a cryogenically frozen noble gas solid. Once embedded in the noble gas solid, which is optically transparent,…

Instrumentation and Detectors · Physics 2019-06-19 Benjamin Loseth , Ruoyu Fang , Dustin Frisbie , Kristen Parzuchowski , Claudio Ugalde , Jennifer Wenzl , Jaideep Taggart Singh

A multi-cell He gas-scintillator active target, designed for the measurement of photoreaction cross sections, is described. The target has four main chambers, giving an overall thickness of 0.103 $\mathrm{g/cm^{2}}$ at an operating pressure…

The photoneutron reaction $^{181}\rm{Ta}(\gamma,3n)^{178m,g}\rm{Ta}$ was investigated with the beam from the NSC KIPT electron linear accelerator LUE-40. The measurements were performed using the residual $\gamma$-activity method. The…

Nuclear Experiment · Physics 2022-01-26 O. S. Deiev , I. S. Timchenko , S. N. Olejnik , V. A. Kushnir , V. V. Mytrochenko , S. A. Perezhogin

Photoneutron cross sections were measured for $^{58}$Ni, $^{60}$Ni, $^{61}$Ni, and $^{64}$Ni at energies between the one-neutron and two-neutron thresholds using quasi-monochromatic $\gamma$-ray beams produced in laser Compton-scattering at…

Photonuclear reaction is described with an approach based on the quasideuteron nuclear photoabsorption model followed by the process of competition between light particle evaporation and fission for the excited nucleus. Thus fission process…

Nuclear Theory · Physics 2008-11-26 Tapan Mukhopadhyay , D. N. Basu