Browsing by Title

Now showing items 1420-1439 of 24089

    • Astrophysical Rates for Explosive Nucleosynthesis : Stellar and Laboratory Rates for Exotic Nuclei 

      Rauscher, T. (2010-03-01)
      A selected overview of stellar effects and reaction mechanisms with relevance to the prediction of astrophysical reaction rates far off stability is provided.

    • Astrophysical reaction rate for the Li-8(n,gamma)Li-9 reaction 

      Kobayashi, H.; Ieki, K.; Horvath, A.; Galonsky, A.; Carlin, N.; Deak, F.; Gomi, T.; Guimaraes, V.; Higurashi, Y.; Iwata, Y.; Kiss, A.; Kolata, J.J.; Rauscher, T.; Schelin, H.; Seres, Z.; Warner, R. (2003-01)
      An attempt was made to measure the excitation function of the cross section for the Li-8(n,gamma)Li-9 reaction by performing the inverse reaction Li-9(gamma,n)Li-8, with the equivalent photons in the electric field of ...

    • Astrophysical Reaction Rates as a Challenge for Nuclear Reaction Theory 

      Rauscher, T. (American Institute of Physics (AIP), 2010)
      The relevant energy ranges for stellar nuclear reactions are introduced. Low-energy compound and direct reactions are discussed. Stellar modifications of the cross sections are presented. Implications for experiments are outlined.

    • Astrophysical reaction rates for B-10(p,alpha)Be-7 and B-11(p,alpha)Be-8 from a direct model 

      Rauscher, T.; Raimann, G. (1996-05)
      The reactions B-10(p,alpha)Be-7 and B-11(p,alpha)Be-8 are studied at thermonuclear energies using DWBA calculations. For both reactions, transitions to the ground states and first excited states are investigated. In the ...

    • Astrophysical reaction rates from statistical model calculations 

      Rauscher, T.; Thielemann, Friedrich-Karl (2000)
      Theoretical reaction rates in the temperature range 0.01 x 10(9) less than or equal to T(K) less than or equal to 10.0 x 10(9) are calculated in the statistical model (Hauser-Feshbach formalism) for targets with 10 less ...

    • Astrophysical relevance of gamma transition energies 

      Rauscher, T. (2008-09)
      The relevant gamma energy range is explicitly identified where additional gamma strength must be located to have an impact on astrophysically relevant reactions. It is shown that folding the energy dependences of the ...

    • 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, 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 ...

    • The astrophysical S-factor of the reaction Be-7(P,gamma)B-8 in the direct capture model 

      Krauss, H.; Grun, K.; Rauscher, T.; Oberhummer, H. (1993)
      The astrophysical S-factor for the reaction Be-7(p, gamma)B-8 up to an energy of 2 MeV (c.m.) and the capture cross section of Li-7(n, gamma)Li-8 up to 1 MeV (c.m.) are calculated using the Direct Capture model (DC). Both ...

    • Astrophysical S-factors and reaction rates of (p,n)-reactions on (117)Sn, (118)Sn, (122)Sn, and (124)Sn 

      Skakun, Ye; Rauscher, T. (EDP Sciences, 2008)
      Astrophysical S-factors and reaction rates were derived from available cross sections of (p,n)-reactions on (117)Sn, (118)Sn, (122)Sn, and (124)Sn isotopes at incident proton energies up to 9 MeV. The statistical theory ...

    • Astrophysical S-Factors and Reaction Rates of Threshold (p,n)-Reactions on (99-102)Ru 

      Skakun, Ye; Rauscher, T. (American Institute of Physics (AIP), 2010)
      Astrophysical S-factors of (p,n) reactions on (99)Ru, (100)Ru, (101)Ru, and (102)Ru were derived from the sum of experimental isomeric and ground states cross sections measured in the incident proton energy range of 5-9 ...

    • Astrophysics and nuclei far from stabilitys 

      Thielemann, F.K.; Kratz, K.L.; Pfeiffer, B.; Rauscher, T.; van Wormer, L.; Wiescher, M. (1994-03)
      We discuss unstable nuclei on the proton-rich and neutron rich side of stability and their properties of astrophysical relevance. The Coulomb barriers in charged-particle captures lead to a cycle pattern which is not ...

    • Astrophysics at n_TOF Facility at CERN 

      Tagliente, G.; Abbondanno, U.; Aerts, G.; Alvarez, H.; Alvarez-Velarde, F.; Andriamonje, S.; Andrzejewski, J.; Audouin, L.; Badurek, G.; Baumann, P.; Becvar, F.; Belloni, F.; Berthoumieux, E.; Bisterzo, S.; Calvino, F.; Calviani, M.; Cano-Ott, D.; Capote, R.; Carrapico, C.; Cennini, P.; Chepel, V.; Chiaveri, E.; Colonna, N.; Cortes, G.; Couture, A.; Cox, J.; Dahlfors, M.; David, S.; Dillman, I.; Domingo-Pardo, C.; Dridi, W.; Duran, I.; Eleftheriadis, C.; Embid-Segura, M.; Ferrari, A.; Ferreira-Marques, R.; Fujii, K.; Furman, W.; Gallino, R.; Goncalves, I.; Gonzalez-Romero, E.; Gramegna, F.; Guerrero, C.; Gunsing, F.; Haas, B.; Haight, R.; Heil, M.; Herrera-Martinez, A.; Igashira, M.; Jericha, E.; Kaeppeler, F.; Kadi, Y.; Karadimos, D.; Karamanis, D.; Kerveno, M.; Koehler, P.; Kossionides, E.; Krticka, M.; Leeb, H.; Lindote, A.; Lopes, I.; Lozano, M.; Lukic, S.; Marganiec, J.; Marrone, S.; Martinez, T.; Massimi, C.; Mastinu, P.; Mengoni, A.; Milazzo, P. M.; Mosconi, M.; Neves, F.; Oberhummer, H.; Pancin, J.; Papachristodoulou, C.; Papadopoulos, C.; Paradela, C.; Patronis, N.; Pavlik, A.; Pavlopoulos, P.; Perrot, L.; Pigni, T.; Plag, R.; Plompen, A.; Plukis, A.; Poch, A.; Praena, J.; Pretel, C.; Quesada, J.; Rauscher, T.; Reifarth, R.; Rubbia, C.; Rudolf, G.; Rullhusen, P.; Salgado, J.; Santos, C.; Sarchiapone, L.; Savvidis, I.; Stephan, C.; Tain, J. L.; Tassan-Got, L.; Tavora, L.; Terlizzi, R.; Vannini, G.; Vaz, P.; Ventura, A.; Villamarin, D.; Vincente, M. C.; Vlachoudis, V.; Vlastou, R.; Voss, F.; Walter, S.; Wendler, H.; Wiescher, M.; Wisshak, K. (IOP Publishing Ltd., 2011)
      The neutron time of flight (n_TOF) facility at CERN is a spallation neutron source with white neutron energy spectrum (from thermal to several GeV), covering the full energy range of interest for nuclear astrophysics, in ...

    • Astrophysics: : Elemental abundances across cosmic time 

      Kobayashi, Chiaki (2016-12-08)
      The chemical composition of a massive galaxy in the early Universe reveals an extremely short period of star formation. This result could challenge our ideas about the evolution of galaxies and of the Universe itself.

    • Astrophysics: refreshed shocks from a y-ray burst 

      Granot, J.; Nakar, E.; Piran, T. (2003)
      GRB 030329 is unique in many aspects. It has a very low redshift for a GRB, z = 0.1685, and is therefore very bright and easy to monitor, making it the most well studied afterglow to date. It shows a supernova bump in the ...

    • AstroVaDEr: Astronomical Variational Deep Embedder for Unsupervised Morphological Classification of Galaxies and Synthetic Image Generation 

      Spindler, Ashley; Geach, James E.; Smith, Michael J. (2021-03-01)
      We present AstroVaDEr (Astronomical Variational Deep Embedder), a variational autoencoder designed to perform unsupervised clustering and synthetic image generation using astronomical imaging catalogues. The model is a ...

    • Asymmetric effects of interest rate changes: the role of the consumption-wealth channel 

      MacDonald, Garry; Mullineux, Andy; Sensarma, Rudra (2011)
      This article examines the role of the consumption-wealth channel in explaining asymmetric effects of monetary policy changes. Towards this end, we draw upon available literature on the consumption function and behavioural ...

    • Asymmetrical Performance and Abnormal Synergies of the Post-Stroke Patient Wearing SCRIPT Passive Orthosis in Calibration, Exercise and Energy Evaluation 

      Qin, Y; Rahman, N; Amirabdollahian, F (2014-06-17)
      In the context of therapeutic human-robot interaction, it is important to detect human contribution in interaction with robots, thus to auto-tune a robot to compensate or resist based on such input. A passive orthosis is ...

    • Asymmetries in extragalactic double radio sources: clues from 3D simulations of jet-disc interaction 

      Gaibler, V.; Khochfar, S.; Krause, M. (2011-02-11)
      Observational and theoretical studies of extragalactic radio sources have suggested that an inhomogeneous environment may be responsible for observed arm-length asymmetries of jets and the properties of extended emission-line ...

    • Asymptomatic infection of winter and spring barley by Rhynchosporium secalis: effects and implications for epidemiology and host resistance 

      Atkins, Simon D.; Stonard, J. F.; Fraaije, B. A.; Lucas, J. A.; Fitt, Bruce D.L.; Newton, A. C. (ICARDA, 2010)

    • Asymptotic Bethe equations for open boundaries in planar AdS/CFT 

      Young, Charles A. S.; Correa, Diego (2010)
      We solve, by means of a nested coordinate Bethe ansatz, the open-boundaries scattering theory describing the excitations of a free open string propagating in $AdS_5\times S^5$, carrying large angular momentum $J=J_{56}$, ...