Browsing by Author "Somorjai, E."

Now showing items 1-20 of 45

    • 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 ...

    • alpha-nucleus potentials and photon-induced nucleosynthesis 

      Galaviz, D.; Babilon, M.; Fulop, Zs.; Gyurky, Gy.; Hillier, R.; Mate, Z.; Mohr, P.; Rauscher, T.; Somorjai, E.; Zilges, A.; Zolnai, L. (2003-05-05)
      New data for the Sn-112,Sn-12 4(alpha,alpha) (112,124) Sn reaction have been measured and are presently analyzed. Results of the Sn-112 circle times alpha potential at the energy Ec.m approximate to 14 MeV are presented. ...

    • 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 ...

    • Comparison of experimental and calculated S-factors of the p-process reaction Sm-144(alpha,gamma)Gd-148 

      Somorjai, E.; Fulop, Zs.; Kiss, A.Z.; Rolfs, C.E.; Trautvetter, H.P.; Greife, U.; Junker, M.; Goriely, S.; Arnould, M.; Rayet, M.; Rauscher, T.; Oberhummer, H. (IOP Publishing Ltd., 1998)
      The cross section of the Sm-144(alpha,gamma)Gd-148 reaction has been measured at bombarding energies in the 10.5 - 13.4 MeV range using an activation method based on the off-line alpha-activity measurement of the Gd-148 ...

    • A comprehensive study of the Cd-106(alpha, gamma)Sn-110 reaction at energies relevant to the p-process 

      Gyurky, Gy.; Fulop, Zs.; Kiss, G.; Mate, Z.; Somorjai, E.; Gorres, J.; Palumbo, A.; Wiescher, M.; Galaviz, D.; Kretschmer, A; Sonnabend, K.; Zilges, A.; Rauscher, T. (2005-07-25)
      In order to test the reliability of reaction rate calculations in the framework of the Hauser-Feshbach statistical model, the cross sections of Cd-106(alpha,gamma)Sn-110 radiative capture reaction were determined in the ...

    • 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 ...

    • Determination of a-nucleus potentials by alpha-elastic scattering and its implications for the gamma-process 

      Galaviz, D.; Babilon, M.; Fulop, Zs.; Gyurky, Gy.; Mate, Z.; Hillier, R.; Mohr, P.; Rauscher, T.; Somorjai, E.; Zilges, A.; Zolnai, L. (2003-05-19)
      Complete angular distributions for the reactions Sn-112,Sn-124(alpha,alpha)(112,124) Sn have been measured at different energies around the Coulomb barrier. Preliminary results for the Sn-112 circle times alpha and Sn-124 ...

    • 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 Sn-112 and Sn-124 at astrophysically relevant energies 

      Galaviz, D.; Fulop, Zs.; Gyurky, Gy.; Mate, Z.; Mohr, P.; Rauscher, T.; Somorjai, E.; Zilges, A. (2005-06)
      The cross sections for the elastic scattering reactions Sn-112,Sn-124(alpha,alpha)Sn-112,Sn-124 at energies above and below the Coulomb barrier are presented and compared to predictions for global alpha-nucleus potentials. ...

    • 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 cross section of Sm-144(alpha, gamma)Gd-148 and implications for the p-process 

      Somorjai, E.; Fulop, Zs.; Kiss, A.Z.; Rolfs, C.E.; Trautvetter, H.P.; Greife, U.; Junker, M.; Goriely, S.; Arnould, M.; Rayet, M.; Rauscher, T.; Oberhummer, H. (1998-05-20)
      The cross section of the Sm-144(alpha, gamma) Gd-148 reaction has been measured at bombarding energies in the 10.5-13.4 MeV range using an activation method based on the off-line alpha-activity measurement of the Gd-148 ...