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Browsing University of Hertfordshire by Author "Kiss, G. G."
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The 106Cd(α, α)106Cd elastic scattering in a wide energy range for γ process studies
Ornelas, A.; Kiss, G. G.; Mohr, P.; Galaviz, D.; Fülöp, Zs; Gyürky, Gy; Máté, Z.; Rauscher, T.; Somorjai, E.; Sonnabend, K.; Zilges, A. (2015-08-01)Alpha elastic scattering angular distributions of the <sup>106</sup>Cd(α, α)<sup>106</sup>Cd reaction were measured at three energies around the Coulomb barrier to provide a sensitive test for the α + nucleus optical ... -
(70)Ge(p,gamma)(71)As and (76)Ge(p,n)(76)As cross sections for the astrophysical p process : Sensitivity of the optical proton potential at low energies
Kiss, G. G.; Gyuerky, Gy.; Elekes, Z.; Fueloep, Zs.; Somorjai, E.; Rauscher, T. (2007-11)The cross sections of the (70)Ge(p,gamma)(71)As and (76)Ge(p,n)(76)As reactions have been measured with the activation method in the Gamow window for the astrophysical p process. The experiments were carried out at the Van ... -
The (85)Rb(p,n)(85)Sr reaction and the modified proton optical potential
Kiss, G. G.; Gyuerky, Gy.; Simon, A.; Fueloep, Zs.; Somorjai, E.; Rauscher, T. (American Institute of Physics (AIP), 2009)The cross sections of the astrophysically relevant (85)Rb(p,n)(85)Sr(g,m) reaction have been measured between E(c.m). = 2.16 and 3.96 MeV. The cross sections have been derived by measuring the gamma radiation following the ... -
Activation method combined with characteristic X-ray counting : A possibility to measure (alpha, gamma) cross sections on heavy p-nuclei
Kiss, G. G.; Szuecs, T.; Gyuerky, Gy.; Fueloep, Zs.; Farkas, J.; Kertesz, Zs.; Somorjai, E.; Laubenstein, M.; Froehlich, C.; Rauscher, T. (2011-10-01)For an improved modeling of the astrophysical nucleosynthesis of p-nuclei, low energy cross section data of alpha-induced reactions on heavy isotopes are needed. Technical difficulties hamper the experimental determination ... -
Alpha induced reaction cross section measurements on 162Er for the astrophysical γ process
Kiss, G. G.; Szücs, T.; Rauscher, T.; Török, Z.; Fülöp, Z.; Gyürky, G.; Halász, Z.; Somorjai, E. (2014-07-30)The cross sections of the Er162(α,γ)Yb166 and Er162(α,n)Yb165 reactions have been measured for the first time. The radiative alpha capture reaction cross section was measured from Ec.m.=16.09MeV down to Ec.m.=11.21MeV, ... -
alpha-induced cross sections of Cd-106 for the astrophysical p process
Gyurky, Gy.; Kiss, G. G.; Elekes, Z.; Fulop, Zs.; Somorjai, E.; Palumbo, A.; Gorres, J.; Lee, H. Y.; Rapp, W.; Wiescher, M.; Ozkan, N.; Guray, R. T.; Efe, G.; Rauscher, T. (2006-08)The Cd-106(alpha,gamma)Sn-110 reaction cross section has been measured in the energy range of the Gamow window for the astrophysical p-process scenario. The cross sections for Cd-106(alpha,n)Sn-109 and for Cd-106(alpha,p)In-109 ... -
Alpha-induced reaction cross section measurements on Eu-151 for the astrophysical gamma-process
Gyuerky, Gy.; Elekes, Z.; Farkas, J.; Fueloep, Zs.; Halasz, Z.; Kiss, G. G.; Somorjai, E.; Szuecs, T.; Guray, R. T.; Ozkan, N.; Yalcin, C.; Rauscher, T. (2010-11)In order to extend the experimental database relevant for the astrophysical gamma-process towards the unexplored heavier mass region, the cross sections of the Eu-151(alpha, gamma)Tb-155 and Eu-151 (alpha, n)Tb-154 reactions ... -
Alpha-induced reactions for the astrophysical p-process : the case of (151)Eu
Gyuerky, G. Y.; Elekes, Z.; Farkas, J.; Fueloep, Z. S.; Kiss, G. G.; Somorjai, E.; Szuecs, T.; Guray, R. T.; Ozkan, N.; Yalcin, C.; Rauscher, T. (IOP Publishing Ltd., 2010)The cross sections of (151)Eu(alpha, gamma)(155)Tb and (151)Eu(alpha,n)(154)Tb reactions have been measured with the activation method. Some aspects of the measurement are presented here to illustrate the requirements of ... -
Astrophysical analysis of the measurement of (alpha,gamma) and (alpha,n) cross sections of Tm-169
Rauscher, T.; Kiss, G. G.; Szuecs, T.; Fueloep, Zs.; Froehlich, Carla; Gyuerky, Gy.; Halasz, Z.; Kertesz, Zs.; Somorjai, E. (2012-07-05)Reaction cross sections of Tm-169(alpha, gamma)Lu-173 and Tm-169(alpha, n)Lu-172 have been measured in the energy range 12.6 -
Astrophysical S-factor for alpha-Capture of (113)In in the p-Process Energy Range
Yalcin, C.; Gueray, R. T.; Oezkan, N.; Kutlu, S.; Gyuerky, Gy.; Farkas, J.; Kiss, G. G.; Fueloep, Zs.; Rauscher, T.; Somorjai, E. (American Institute of Physics (AIP), 2009)The cross sections of (113)In(alpha, gamma)(117)Sb and (113)In(alpha,n)(116)Sb reactions have been measured using the activation method. The experiments were carried out at the ATOMKI cyclotron accelerator in the center ... -
Coulomb Suppression of the Stellar Enhancement Factor
Kiss, G. G.; Rauscher, T.; Gyurky, Gy.; Simon, A.; Fueloep, Zs.; Somorjai, E. (2008-11-07)It is commonly assumed that reaction measurements for astrophysics should be preferably performed in the direction of a positive Q value to minimize the impact of the stellar enhancement factor, i.e., the difference between ... -
Cross section measurements for γ-process studies using a LEPS detector
Szücs, T.; Kiss, G. G.; Rauscher, T.; Török, Zs; Halász, Z.; Fülöp, Zs; Gyürky, Gy; Somorjai, E. (2016-01-05)In this paper we present the ongoing experiments at ATOMKI related to our systematic γ-process studies. These studies are intended to enlarge the limited experimental database from α-induced reactions on nuclei in the ... -
Cross section of α-induced reactions on iridium isotopes obtained from thick target yield measurement for the astrophysical γ process
Szücs, T.; Kiss, G. G.; Gyürky, Gy; Halász, Z.; Fülöp, Zs; Rauscher, T. (2018-01-10)The stellar reaction rates of radiative α-capture reactions on heavy isotopes are of crucial importance for the γ process network calculations. These rates are usually derived from statistical model calculations, which ... -
Cross-section measurement of the Ba 130 (p,γ) La 131 reaction for γ -process nucleosynthesis
Netterdon, L.; Endres, A.; Kiss, G. G.; Mayer, J.; Rauscher, T.; Scholz, P.; Sonnabend, K.; Török, Zs; Zilges, A. (2014-09-25)Background: Deviations between experimental data of charged-particle-induced reactions and calculations within the statistical model are frequently found. An extended data base is needed to address the uncertainties regarding ... -
Determining reaction cross sections via characteristic X-ray detection : alpha-induced reactions on Tm-169 for the astrophysical gamma-process
Kiss, G. G.; Rauscher, T.; Szuecs, T.; Kertesz, Zs.; Fueloep, Zs.; Gyuerky, Gy.; Froehlich, C.; Farkas, J.; Elekes, Z.; Somorjai, E. (2011-01-17)The cross sections of the Tm-169(alpha, gamma)Lu-173 and Tm-169(alpha,n)Lu-172 reactions have been measured first time using a new method, by detecting the characteristic X-ray radiation following the electron capture-decay ... -
Elastic alpha-scattering on proton rich nuclei at astrophysically relevant energies
Fulop, Zs.; Galaviz, D.; Gyurky, Gy.; Kiss, G. G.; Mate, Z.; Mohr, P.; Rauscher, T.; Somorjai, E.; Zilges, A. (American Institute of Physics (AIP), 2006)In order to improve the reliability of statistical model calculations in the region of heavy proton rich nuclei several elastic alpha scattering experiments have been carried out at low bombarding energies on various ... -
Experimental study of the astrophysical γ -process reaction Xe 124 (α,γ) Ba 128
Halász, Z.; Somorjai, E.; Gyürky, Gy; Elekes, Z.; Fülöp, Zs; Szücs, T.; Kiss, G. G.; Szegedi, N. T.; Rauscher, T.; Görres, J.; Wiescher, M. (2016-10-10)Background: The synthesis of heavy, proton rich isotopes in the astrophysical γ process proceeds through photodisintegration reactions. For the improved understanding of the process, the rates of the involved nuclear ... -
High precision 113In(α,α)113In elastic scattering at energies near the Coulomb barrier for the astrophysical γ process
Kiss, G. G.; Mohr, P.; Fulop, Zs.; Rauscher, T.; Gyurky, Gy.; Szücs, Tamas; Halasz, Z.; Somorjai, E.; Ornelas, A.; Yalcin, C.; Guray, R. T.; Ozkan, N. (2013-10-28)Background: The γ process in supernova explosions is thought to explain the origin of proton-rich isotopes between Se and Hg, the so-called p nuclei. The majority of the reaction rates for γ process reaction network studies ... -
How important is the Family? : Alpha nuclear potentials and p-process nucleosynthesis
Ornelas, A.; Galaviz, D.; Fueloep, Zs.; Gyuerky, Gy.; Kiss, G. G.; Mate, Zs.; Mohr, P.; Rauscher, T.; Somorjai, E.; Sonnabend, K.; Zilges, A. (SISSA, 2011-01)In this work we present the results from the analysis of the experimentally measured angular distributions of the reaction 106Cd(α , α )106 Cd at several different energies around the Coulomb barrier. The difficulties that ... -
Investigation of Alpha-Induced Reactions on 107Ag at Astrophysical Energies
Yalçin, C.; Özkan, N.; Güray, R. T.; Gyürky, Gy; Kiss, G. G.; Szücs, T.; Haiász, Z.; Fülöp, Zs; Farkas, J.; Somorjai, E.; Korkulu, Z.; Rauscher, T. (2016-01-05)Cross sections of the 107Ag(α, γ)111In and 107Ag(α,n)110In reactions have been measured with the activation method at effective center-of-mass energies between 7.79 MeV and 12.00 MeV close to the astrophysical energy range. ...