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34 results on '"Rauscher, T."'

2. Abundance Uncertainties ObtainedWith the PizBuin Framework For Monte Carlo Reaction Rate Variations.

Author

Rauscher, T., Nishimura, N., Cescutti, G., Hirschi, R., and Murphy, A. St. J.

Subjects
*NUCLEAR reactions, *NUCLEOSYNTHESIS, *COSMIC abundances, *MONTE Carlo method, *SUPERGIANT stars, *ASYMPTOTIC giant branch stars
Abstract

Uncertainties in nucleosynthesis models originating from uncertainties in astrophysical reaction rates were estimated in a Monte Carlo variation procedure. Thousands of rates were simultaneously varied within individual, temperature-dependent errors to calculate their combined effect on final abundances. After a presentation of the method, results from application to three different nucleosynthesis processes are shown: the γ-process and the s-process in massive stars, and the main s-process in AGB stars (preliminary results). Thermal excitation of nuclei in the stellar plasma and the combined action of several reactions increase the final uncertainties above the level of the experimental errors. The total uncertainty, on the other hand, remains within a factor of two even in processes involving a large number of unmeasured rates, with some notable exceptions for nuclides whose production is spread over several stellar layers and for s-process branchings. [ABSTRACT FROM AUTHOR]

Published
2018
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4. Theory Considerations For Nucleosynthesis Beyond Fe With Special Emphasis On p-Nuclei In Massive Stars.

Author

Rauscher, T., Nishimura, N., and Hirschi, R.

Subjects
*NUCLEOSYNTHESIS, *ASTROPHYSICS, *HEAVY elements, *SUPERGIANT stars, *IRON, *NUCLEAR reactions
Abstract

Nucleosynthesis of heavy elements requires the use of different experimental and theoretical methods to determine astrophysical reaction rates than light element nucleosynthesis. Additionally, there are also larger uncertainties involved in the astrophysical models, both because the sites are not well known and because of differing numerical treatments in different models. As an example for the latter, the production of p-nuclei is compared in two different stellar models, demonstrating that a model widely used for postproduction calculations may have a zone grid too coarse to follow the synthesis of p-nuclei in detail. [ABSTRACT FROM AUTHOR]

Published
2016
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5. Neutron research at the N_TOF facility (CERN): Results and perspectives

Author

Colonna, N., primary, Altstadt, S., additional, Andrzejewski, J., additional, Audouin, L., additional, Barbagallo, M., additional, Bécares, V., additional, Bečvář, F., additional, Belloni, F., additional, Berthoumieux, E., additional, Billowes, J., additional, Boccone, V., additional, Bosnar, D., additional, Brugger, M., additional, Calviani, M., additional, Calviño, F., additional, Cano-Ott, D., additional, Carrapiço, C., additional, Cerutti, F., additional, Chiaveri, E., additional, Chin, M., additional, Cortés, G., additional, Cortés-Giraldo, M. A., additional, Diakaki, M., additional, Domingo-Pardo, C., additional, Duran, I., additional, Dzysiuk, N., additional, Eleftheriadis, C., additional, Ferrari, A., additional, Fraval, K., additional, Ganesan, S., additional, García, A. R., additional, Giubrone, G., additional, Gómez- Hornillos, M. B., additional, Gonçalves, I. F., additional, González-Romero, E., additional, Griesmayer, E., additional, Guerrero, C., additional, Gunsing, F., additional, Gurusamy, P., additional, Jenkins, D. G., additional, Jericha, E., additional, Kadi, Y., additional, Käppeler, F., additional, Karadimos, D., additional, Koehler, P., additional, Kokkoris, M., additional, Krtička, M., additional, Kroll, J., additional, Langer, C., additional, Lederer, C., additional, Leeb, H., additional, Leong, L. S., additional, Losito, R., additional, Manousos, A., additional, Marganiec, J., additional, Martínez, T., additional, Massimi, C., additional, Mastinu, P. F., additional, Mastromarco, M., additional, Meaze, M., additional, Mendoza, E., additional, Mengoni, A., additional, Milazzo, P. M., additional, Mingrone, F., additional, Mirea, M., additional, Mondalaers, W., additional, Paradela, C., additional, Pavlik, A., additional, Perkowski, J., additional, Plompen, A., additional, Praena, J., additional, Quesada, J. M., additional, Rauscher, T., additional, Reifarth, R., additional, Riego, A., additional, Roman, F., additional, Rubbia, C., additional, Sarmento, R., additional, Schillebeeckx, P., additional, Schmidt, S., additional, Tagliente, G., additional, Tain, J. L., additional, Tarrío, D., additional, Tassan-Got, L., additional, Tsinganis, A., additional, Valenta, S., additional, Vannini, G., additional, Variale, V., additional, Vaz, P., additional, Ventura, A., additional, Versaci, R., additional, Vermeulen, M. J., additional, Vlachoudis, V., additional, Vlastou, R., additional, Wallner, A., additional, Ware, T., additional, Weigand, M., additional, Weiss, C., additional, Wright, T. J., additional, and Žugec, P., additional

Published
2013
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6. Measurement of alpha-induced reaction cross sections on erbium isotopes for γ process studies.

Author

Kiss, G. G., Szücs, T., Török, Zs., Fülöp, Zs., Gyürky, Gy., Halász, Z., Somorjai, E., and Rauscher, T.

Subjects
ALPHA decay, NUCLEAR cross sections, PROTONS, ISOTOPES, ATOMIC nucleus, YTTERBIUM, ERBIUM, X-ray spectroscopy
Abstract

The cross sections of the 162Er(α,γ)166Yb and 162,164,166Er(α,n)165,167,169Yb reactions have been measured at MTA Atomki. The radiative alpha capture reaction cross section was measured between Ec.m. = 11.21 MeV and Ec.m. = 16.09 MeV just above the astrophysically relevant energy region (which lies between 7.8 and 11.48 MeV at T9 = 3 GK). The 162Er(α,n)165Yb, 164Er(α,n)167Yb and 166Er(α,n)169Yb reactions were studied between Ec.m. = 12.19 and 16.09 MeV, Ec.m. = 13.17 and 16.59 MeV and Ec.m. = 12.68 and 17.08 MeV, respectively. The aim of this work is to provide experimental data for modeling the γ process which is thought to be responsible for the production of the proton-rich isotopes heavier than iron. [ABSTRACT FROM AUTHOR]

Published
2014
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10. ṉTOF Experiment: Past, Present And Future

Author

Marrone, S., primary, Abbondanno, U., additional, Aerts, G., additional, Álvarez, H., additional, Alvarez-Velarde, F., additional, Andriamonje, S., additional, Andrzejewski, J., additional, Assimakopoulos, P., additional, Audouin, L., additional, Badurek, G., additional, Baumann, P., additional, Bečvář, F., additional, Berthoumieux, E., additional, Calviani, M., additional, Calviño, F., additional, Cano-Ott, D., additional, Capote, R., additional, de Albornoz, A. Carnllo, additional, Cennini, P., additional, Chepel, V., additional, Chiaveri, E., additional, Colonna, N., additional, Cortes, G., additional, Couture, A., additional, Cox, J., additional, Dahlfors, M., additional, David, S., additional, Dillmann, I., additional, Dolfini, R., additional, Domingo-Pardo, C., additional, Dridi, W., additional, Duran, I., additional, Eleftheriadis, C., additional, Embid-Segura, M., additional, Ferrant, L., additional, Ferrari, A., additional, Ferreira-Marques, R., additional, Fitzpatrick, L., additional, Frais-Koelbl, H., additional, Fujii, K., additional, Furman, W., additional, Gallino, R., additional, Goncalves, I., additional, Gonzalez-Romero, E., additional, Goverdovski, A., additional, Gramegna, F., additional, Griesmayer, E., additional, Guerrero, C., additional, Gunsing, F., additional, Haas, B., additional, Haight, R., additional, Heil, M., additional, Herrera-Martinez, A., additional, Igashira, M., additional, Isaev, S., additional, Jericha, E., additional, Kadi, Y., additional, Käppeler, F., additional, Karamanis, D., additional, Karadimos, D., additional, Kerveno, M., additional, Ketlerov, V., additional, Koehler, P., additional, Konovalov, V., additional, Kossionides, E., additional, Krtička, M., additional, Lamboudis, C., additional, Leeb, H., additional, Lindote, A., additional, Lopes, I., additional, Lozano, M., additional, Lukic, S., additional, Marganiec, J., additional, Marques, L., additional, Massimi, C., additional, Mastinu, P., additional, Mengoni, A., additional, Milazzo, P. M., additional, Moreau, C., additional, Mosconi, M., additional, Neves, F., additional, Oberhummer, H., additional, O’Brien, S., additional, Pancin, J., additional, Papachristodoulou, C., additional, Papadopoulos, C., additional, Paradela, C., additional, Patronis, N., additional, Pavlik, A., additional, Pavlopoulos, P., additional, Perrot, L., additional, Pignatari, M., additional, Plag, R., additional, Plompen, A., additional, Plukis, A., additional, Poch, A., additional, Pretel, C., additional, Quesada, J., additional, Rauscher, T., additional, Reifarth, R., additional, Rosetti, M., additional, Rubbia, C., additional, Rudolf, G., additional, Rullhusen, P., additional, Salgado, J., additional, Sarchiapone, L., additional, Savvidis, I., additional, Stephan, C., additional, Tagliente, G., additional, Tain, J. L., additional, Tassan-Got, L., additional, Tavora, L., additional, Terlizzi, R., additional, Vannini, G., additional, Vaz, P., additional, Ventura, A., additional, Villamarin, D., additional, Vincente, M. C., additional, Vlachoudis, V., additional, Vlastou, R., additional, Voss, F., additional, Walter, S., additional, Wendler, H., additional, Wiescher, M., additional, Wisshak, K., additional, Dashdorj, Dugersuren, additional, Agvaanluvsan, Undraa, additional, and Mitchell, Gary E., additional

Published
2009
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12. Astrophysical S-factor for α-Capture of [sup 113]In in the p-Process Energy Range

Author

Yalçin, C., primary, Güray, R. T., additional, Özkan, N., additional, Kutlu, S., additional, Gyürky, Gy., additional, Farkas, J., additional, Kiss, G. G., additional, Fülöp, Zs., additional, Rauscher, T., additional, Somorjai, E., additional, Jolie, Jan, additional, Zilges, Andreas, additional, Warr, Nigel, additional, and Blazhev, Andrey, additional

Published
2009
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13. Recent Experiments at ORELA and LANSCE, and Their Impact on Compound Nuclear Models

Author

Koehler, P. E., primary, Guber, K. H., additional, Harvey, J. A., additional, Rauscher, T., additional, Ullmann, J. L., additional, Bredeweg, T. A., additional, O'Donnell, J. M., additional, Reifarth, R., additional, Rundberg, R. S., additional, Vieira, D. J., additional, Wouters, J. M., additional, Escher, Jutta, additional, Dietrich, Frank S., additional, Kawano, Toshihiko, additional, and Thompson, Ian J., additional

Published
2008
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15. Recent Results at ṉTOF and Future Perspectives

Author

Marrone, S., primary, Abbondanno, U., additional, Aerts, G., additional, Álvarez, H., additional, Alvarez-Velarde, F., additional, Andriamonje, S., additional, Andrzejewski, J., additional, Assimakopoulos, P., additional, Audouin, L., additional, Badurek, G., additional, Baumann, P., additional, Bec^vár^, F., additional, Berthoumieux, E., additional, Calviani, M., additional, Calviño, F., additional, Cano-Ott, D., additional, Capote, R., additional, de Albornoz, A. Carrillo, additional, Cennini, P., additional, Chepel, V., additional, Chiaveri, E., additional, Colonna, N., additional, Cortes, G., additional, Couture, A., additional, Cox, J., additional, Dahlfors, M., additional, David, S., additional, Dillmann, I., additional, Dolfini, R., additional, Domingo-Pardo, C., additional, Dridi, W., additional, Duran, I., additional, Eleftheriadis, C., additional, Embid-Segura, M., additional, Ferrant, L., additional, Ferrari, A., additional, Ferreira-Marques, R., additional, Fitzpatrick, L., additional, Frais-Koelbl, H., additional, Fujii, K., additional, Furman, W., additional, Gallino, R., additional, Goncalves, I., additional, Gonzalez-Romero, E., additional, Goverdovski, A., additional, Gramegna, F., additional, Griesmayer, E., additional, Guerrero, C., additional, Gunsing, F., additional, Haas, B., additional, Haight, R., additional, Heil, M., additional, Herrera- Martinez, A., additional, Igashira, M., additional, Isaev, S., additional, Jericha, E., additional, Kadi, Y., additional, Käppeler, F., additional, Karamanis, D., additional, Karadimos, D., additional, Kerveno, M., additional, Ketlerov, V., additional, Koehler, P., additional, Konovalov, V., additional, Kossionides, E., additional, Krtic^ka, M., additional, Lamboudis, C., additional, Leeb, H., additional, Lindote, A., additional, Lopes, I., additional, Lozano, M., additional, Lukic, S., additional, Marganiec, J., additional, Marques, L., additional, Massimi, C., additional, Mastinu, P., additional, Mengoni, A., additional, Milazzo, P. M., additional, Moreau, C., additional, Mosconi, M., additional, Neves, F., additional, Oberhummer, H., additional, O'Brien, S., additional, Pancin, J., additional, Papachristodoulou, C., additional, Papadopoulos, C., additional, Paradela, C., additional, Patronis, N., additional, Pavlik, A., additional, Pavlopoulos, P., additional, Perrot, L., additional, Pignatari, M., additional, Plag, R., additional, Plompen, A., additional, Plukis, A., additional, Poch, A., additional, Pretel, C., additional, Quesada, J., additional, Rauscher, T., additional, Reifarth, R., additional, Rosetti, M., additional, Rubbia, C., additional, Rudolf, G., additional, Rullhusen, P., additional, Salgado, J., additional, Sarchiapone, L., additional, Savvidis, I., additional, Stephan, C., additional, Tagliente, G., additional, Tain, J. L., additional, Tassan-Got, L., additional, Tavora, L., additional, Terlizzi, R., additional, Vannini, G., additional, Vaz, P., additional, Ventura, A., additional, Villamarin, D., additional, Vincente, M. C., additional, Vlachoudis, V., additional, Vlastou, R., additional, Voss, F., additional, Walter, S., additional, Wendler, H., additional, Wiescher, M., additional, Wisshak, K., additional, Guandalini, Roald, additional, Palmerini, Sara, additional, and Busso, Maurizio, additional

Published
2008
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16. Measurements of neutron capture cross-sections at n_TOF

Author

Tagliente, G., primary, Abbondanno, U., additional, Aerts, G., additional, Alvarez-Velarde, F., additional, Álvarez-Pol, H., additional, Andriamonje, S., additional, Andrzejewski, J., additional, Badurek, G., additional, Baumann, P., additional, Bečvář, F., additional, Benlliure, J., additional, Berthoumieux, E., additional, Calviño, F., additional, Cano-Ott, D., additional, Capote, R., additional, Cennini, P., additional, Chepel, V., additional, Chiaveri, E., additional, Colonna, N., additional, Cortes, G., additional, Cortina, D., additional, Couture, A., additional, Cox, J., additional, Dababneh, S., additional, Dahlfors, M., additional, David, S., additional, Dolfini, R., additional, Domingo-Pardo, C., additional, Duran, I., additional, Embid-Segura, M., additional, Ferrant, L., additional, Ferrari, A., additional, Ferreira-Marques, R., additional, Frais-Köelbl, H., additional, Furman, W., additional, Goncalves, I., additional, Gallino, R., additional, Gonzalez-Romero, E., additional, Goverdovski, A., additional, Gramegna, F., additional, Griesmayer, E., additional, Gunsing, F., additional, Haas, B., additional, Haight, R., additional, Heil, M., additional, Herrera-Martinez, A., additional, Isaev, S., additional, Jericha, E., additional, Käppeler, F., additional, Kadi, Y., additional, Karadimos, D., additional, Kerveno, M., additional, Ketlerov, V., additional, Koehler, P., additional, Konovalov, V., additional, Krtička, M., additional, Lamboudis, C., additional, Leeb, H., additional, Lindote, A., additional, Lopes, I., additional, Lorusso, G., additional, Lozano, M., additional, Lukic, S., additional, Marganiec, J., additional, Marrone, S., additional, Martinez-Val, J., additional, Massimi, C., additional, Mastinu, P., additional, Mengoni, A., additional, Milazzo, P. M., additional, Molina-Coballes, A., additional, Moreau, C., additional, Mosconi, M., additional, Neves, F., additional, Oberhummer, H., additional, O’Brien, S., additional, Pancin, J., additional, Papaevangelou, T., additional, Paradela, C., additional, Pavlik, A., additional, Pavlopoulos, P., additional, Perlado, J. M., additional, Perrot, L., additional, Pignatari, M., additional, Plag, R., additional, Plompen, A., additional, Plukis, A., additional, Poch, A., additional, Policarpo, A., additional, Pretel, C., additional, Quesada, J., additional, Rapp, W., additional, Rauscher, T., additional, Reifarth, R., additional, Rubbia, C., additional, Rudolf, G., additional, Rullhusen, P., additional, Salgado, J., additional, Soares, J. C., additional, Stephan, C., additional, Tain, J. L., additional, Tassan-Got, L., additional, Tavora, L., additional, Terlizzi, R., additional, Vannini, G., additional, Vaz, P., additional, Ventura, A., additional, Villamarin, D., additional, Vincente, M. C., additional, Vlachoudis, V., additional, Voss, F., additional, Wendler, H., additional, Wiescher, M., additional, and Wisshak, K., additional

Published
2007
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17. Measurement of the Neutron Induced Fission Cross Section on Transuranic (TRU) Elements at the ṉTOF Facility at CERN

Author

Mastinu, P. F., primary, Abbondanno, U., additional, Aerts, G., additional, Álvarez, H., additional, Álvarez-Velarde, F., additional, Andriamonje, S., additional, Andrzejewski, J., additional, Assimakopoulos, P., additional, Audouin, L., additional, Badurek, G., additional, Baumann, P., additional, Becvár, F., additional, Berthoumieux, E., additional, Calviño, F., additional, Calviani, M., additional, Cano-Ott, D., additional, Capote, R., additional, Carrapiço, C., additional, Cennini, P., additional, Chepel, V., additional, Chiaveri, E., additional, Colonna, N., additional, Cortes, G., additional, Couture, A., additional, Cox, J., additional, Dahlfors, M., additional, David, S., additional, Dillman, I., additional, Domingo-Pardo, C., additional, Dridi, W., additional, Duran, I., additional, Eleftheriadis, C., additional, Embid-Segura, M., additional, Ferrant, L., additional, Ferrari, A., additional, Ferreira-Marques, R., additional, Fujii, K., additional, Furman, W., additional, Goncalves, I., additional, González-Romero, E., additional, Gramegna, F., additional, Guerrero, C., additional, Gunsing, F., additional, Haas, B., additional, Haight, R., additional, Heil, M., additional, Herrera-Martinez, A., additional, Igashira, M., additional, Jericha, E., additional, Käppeler, F., additional, Kadi, Y., additional, Karadimos, D., additional, Karamanis, D., additional, Kerveno, M., additional, Koehler, P., additional, Kossionides, E., additional, Krticka, M., additional, Lampoudis, C., additional, Leeb, H., additional, Lindote, A., additional, Lopes, I., additional, Lozano, M., additional, Lukic, S., additional, Marganiec, J., additional, Marrone, S., additional, Martínez, T., additional, Massimi, C., additional, Mengoni, A., additional, Milazzo, P.M., additional, Moreau, C., additional, Mosconi, M., additional, Neves, F., additional, Oberhummer, H., additional, O'Brien, S., additional, Pancin, J., additional, Papachristodoulou, C., additional, Papadopoulos, C., additional, Paradela, C., additional, Patronis, N., additional, Pavlik, A., additional, Pavlopoulos, P., additional, Perrot, L., additional, Pigni, M. T., additional, Plag, R., additional, Plompen, A., additional, Plukis, A., additional, Poch, A., additional, Praena, J., additional, Pretel, C., additional, Quesada, J., additional, Rauscher, T., additional, Reifarth, R., additional, Rubbia, C., additional, Rudolf, G., additional, Rullhusen, P., additional, Salgado, J., additional, Santos, C., additional, Sarchiapone, L., additional, Savvidis, I., additional, Stephan, C., additional, Tagliente, G., additional, Tain, J. L., additional, Tassan-Got, L., additional, Tavora, L., additional, Terlizzi, R., additional, Vannini, G., additional, Vaz, P., additional, Ventura, A., additional, Villamarin, D., additional, Vincente, M. C., additional, Vlachoudis, V., additional, Vlastou, R., additional, Voss, F., additional, Walter, S., additional, Wiescher, M., additional, Wisshak, K., additional, Alarcon, Ricardo, additional, Cole, Philip L., additional, Djalali, Chaden, additional, and Umeres, Fernando, additional

Published
2007
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18. Reaction rate uncertainties and the ν p-process.

Author

Fröhlich, C. and Rauscher, T.

Subjects
*NUCLEAR reactions, *NUCLEOSYNTHESIS, *GRAVITATIONAL collapse, *SUPERNOVAE, *HYDRODYNAMICS, *NUCLEAR physics
Abstract

Current hydrodynamical simulations of core collapse supernovae find proton-rich early ejecta. At the same time, the models fail to eject neutron-rich matter, thus leaving the origin of the main r-process elements unsolved. However, the proton-rich neutrino-driven winds from supernovae have been identified as a possible production site for light n-capture elements beyond iron (such as Ge, Sr, Y, Zr) through the νp-process. The detailed nucleosynthesis patterns of the νp-process depend on the hydrodynamic conditions and the nuclear reaction rates of key reactions. We investigate the impact of reaction rate uncertainties on the νp-process nucleosynthesis. [ABSTRACT FROM AUTHOR]

Published
2012
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19. The 85Rb(p,n)85Sr reaction and the modified proton optical potential.

Author

Kiss, G. G., Gyürky, Gy., Simon, A., Fülöp, Zs., Somorjai, E., and Rauscher, T.

Subjects
ASTROPHYSICS, RADIATIVE capture, RADIOACTIVE nuclear beams, RADIATIVE transfer, RADIOACTIVE decay, COLLISIONS (Nuclear physics)
Abstract

The cross sections of the astrophysically relevant 85Rb(p,n)85Srg,m reaction have been measured between Ec.m. = 2.16 and 3.96 MeV. The cross sections have been derived by measuring the γ radiation following the β decay of the reaction products. A comparison with the predictions of Hauser-Feshbach calculations using the NON-SMOKER code confirms a recently derived modification of the global optical proton potential. [ABSTRACT FROM AUTHOR]

Published
2009
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20. Elastic α-scattering on proton rich nuclei at astrophysically relevant energies.

Author

Fülöp, Zs., Galaviz, D., Gyürky, Gy., Kiss, G. G., Máté, Z., Mohr, P., Rauscher, T., Somorjai, E., and Zilges, A.

Subjects
PARTICLES (Nuclear physics), ION bombardment, COLLISIONS (Nuclear physics), IONS, STELLAR evolution, ASTROPHYSICS
Abstract

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 even-even and semi-magic nuclei. The extracted local optical potential parameters can be compared with the predictions of global alpha potentials. A study on 112,124Sn(α,α)112,124Sn has been made to test the global alpha potentials at both the proton and neutron rich sides of an isotopic chain. The present work describes the experimental challenges of high precision scattering experiments at low energy. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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21. An Updated Library of Reaction Rates for the Astrophysical rp-Process.

Author

Sakharuk, A., Elliot, T., Fisker, J. L., Hemingray, S., Kruizenga, A., Rauscher, T., Schatz, H., Smith, K., Thielemann, F.-K., and Wiescher, M.

Subjects
NUCLEAR astrophysics, ASTROPHYSICS, NUCLEAR physics, DATA libraries, DATABASES
Abstract

We are developing an updated library with reaction rates important for the study of the astrophysical rp- process. It includes both experimental and theoretical rates parametrized in terms of the standard REACLIB format. The experimental data contain various compilations updated with the most recent data. The theoretical data are taken from shell-model calculations whenever available otherwise statistical Hauser-Feshbach calculations were used. All theoretical rates were recalculated using the latest reaction Q-values. All new rates include stellar enhancement factors. The data will be accessed through a convenient web interface. It is anticipated that this JINA project evolves into an evaluated public data archive for reaclib library data. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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22. KADoNiS- The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars.

Author

Dillmann, I., Heil, M., Käppeler, F., Plag, R., Rauscher, T., and Thielemann, F.-K.

Subjects
ONLINE databases, DATABASES, ONLINE information services, NUCLEAR physics, INFORMATION resources
Abstract

The “Karlsruhe Astrophysical Database of Nucleosynthesis in Stars” (KADoNiS) project is an online database for experimental cross sections relevant to the s process and p process. It is available under http://nuclear-astrophysics.fzk.de/kadonis and consists of two parts. Part 1 is an updated sequel to the previous Bao et al. compilations from 1987 and 2000 for (n,γ) cross sections relevant to the big bang and s-process nucleosynthesis. The second part will be an experimental p-process database, which is expected to be launched in winter 2005/06. The KADoNiS project started in April 2005, and a first partial update is online since August 2005. In this paper we present a short overview of the first update of the s-process database, as well as an overview of the status of stellar (n,γ) cross sections of all 32 p isotopes. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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23. Radiative capture reactions and α-elastic scattering on 106Cd for the astrophysical p-process.

Author

Gyürky, Gy., Elekes, Z., Kiss, G. G., Fülöp, Zs., Somorjai, E., Máté, Z., Görres, J., Palumbo, A., Wiescher, M., Lee, H.-Y., Özkan, N., Güray, R. T., Efe, G., Galaviz, D., Kretschmer, A., Sonnabend, K., Zilges, A., and Rauscher, T.

Subjects
NUCLEAR astrophysics, ASTROPHYSICS, NUCLEAR physics, NEUTRONS, NEUTRON sources, PROTONS
Abstract

In the present work both the (α,γ) and (p,γ) cross sections on the p-nucleus 106Cd have been measured in the energy range relevant to the astrophysical p-process. The results are compared with the predictions of the statistical model calculations implemented with the NON-SMOKER code using different input parameters. The proton capture cross section has also been measured for 108Cd. The α + 106Cd optical potential, an important input parameter for the 106Cd(α,γ) reaction rate determination, can be determined directly by measuring the deviation from the Rutherford scattering in the 106Cd(α,α)106Cd elastic scattering experiment. This experiment has also been performed in a wide angular range and the results are compared with different global optical potentials. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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24. Neutron captures and the r-process.

Author

Farouqi, K., Kratz, K.-L., Pfeiffer, B., Rauscher, T., and Thielemann, F.-K.

Subjects
NEUTRONS, PARTICLES (Nuclear physics), NUCLEAR physics, TIN isotopes, ATOMS
Abstract

In order to study possible neutron-capture effects during an r-process, it is necessary to perform fully dynamical simulations. We have performed such calculations within the model of an adiabatically expanding high-entropy bubble of a SN II, using temperature-dependent reaction rates including the NON-SMOKER neutron-capture rates of Rauscher et al.. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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25. The (n,γ) cross sections of short-living s-process branching points.

Author

Sonnabend, K., Mengoni, A., Mohr, P., Rauscher, T., Vogt, K., and Zilges, A.

Subjects
COLLISIONS (Nuclear physics), COSMIC abundances, PARTICLES (Nuclear physics), NUCLEAR reactions, NEUTRONS, NUCLEAR physics
Abstract

An experimental method to determine the (n,γ) cross section of short-living s-process branching points using data of the inverse (γ,n) reaction is presented. The method was used to observe the branching point nucleus 95Zr because the elemental abundance patterns corresponding to this branching point cannot be reproduced by full stellar models and a possible error source is the neutron capture cross section of 95Zr. The analysis of the experiment is still under progress, we will outline the current status in this manuscript. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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26. Nucleosynthesis in massive stars using extended adaptive nuclear reaction networks.

Author

Heger, A., Rauscher, T., Hoffman, R. D., and Woosley, S. E.

Subjects
*NUCLEOSYNTHESIS, *SUPERGIANT stars, *NUCLEAR reactions
Abstract

We present the first calculations to follow the evolution of all stable isotopes and their abundant radioactive progenitors in a finely zoned stellar model from the onset of central hydrogen burning through explosion as a Type II supernova. An extended adaptive nuclear reaction network is implemented that contains about 700 isotopes during hydrogen and helium burning and more than 2500 isotopes during the supernova explosion. The calculations were performed for 15, 20, and 25 M... Pop I stars using the most recently available set of experimental and theoretical nuclear data. We include revised opacity tables, take into account mass loss due to stellar winds, and implement revised weak interaction rates that significantly affect the properties of the presupernova core. An s-process is present, which, along with the usual nucleosynthesis from advanced burning stages and the explosion, produces nearly solar abundances for most nuclei up to A = 60 in the 25 M... star. Between A = 60 and A = 90 we find that the s-process leads to an over-production of key nuclei by a factor ∼ 2 - 3. Above A = 90 the s-process has makes little contribution, but we find the approximately solar production of many proton-rich isotopes above mass number A = 120 due to the γ-process. [ABSTRACT FROM AUTHOR]

Published
2001

27. The 1999 update of stellar neutron capture rates.

Author

Bao, Z. Y., Beer, H., Ka¨ppeler, F., Wisshak, K., Voss, F., and Rauscher, T.

Subjects
NEUTRON capture, NUCLEOSYNTHESIS, STELLAR evolution
Abstract

© 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2000

30. The reaction 70Ge(α,γ)74Se (p-process)

Author

Fülöp, Zs., primary, Kiss, Á. Z., additional, Somorjai, E., additional, Rolfs, C. E., additional, Trautvetter, H. P., additional, Rauscher, T., additional, and Oberhummer, H., additional

Published
1995
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33. Astrophysical S-Factors and Reaction Rates of Threshold (p, n)-Reactions on 99–102Ru.

Author

Skakun, Ye. and Rauscher, T.

Subjects
*ASTROPHYSICS, *PROTONS, *TEMPERATURE of stars, *NUCLEOSYNTHESIS, *COLLISIONS (Nuclear physics)
Abstract

Astrophysical S-factors of (p, n) reactions on 99Ru, 100Ru, 101Ru, and 102Ru were derived from the sum of experimental isomeric and ground states cross sections measured in the incident proton energy range of 5–9 MeV. They were compared with Hauser-Feshbach statistical model predictions of the NON-SMOKER code. Good agreement was found in the majority of cases. Reaction rates were derived up to 8.7 GK stellar temperature by combining experiment and theory. [ABSTRACT FROM AUTHOR]

Published
2010
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34. Astrophysical S-factor for α-Capture of 113In in the p-Process Energy Range.

Author

Yalçin, C., Güray, R. T., Özkan, N., Kutlu, S., Gyürky, Gy., Farkas, J., Kiss, G. G., Fülöp, Zs., Rauscher, T., and Somorjai, E.

Subjects
ASTROPHYSICS, CYCLOTRONS, PARTICLE accelerators, SPECIAL relativity (Physics), PHYSICS
Abstract

The cross sections of 113In(α,γ)117Sb and 113In(α,n)116Sb reactions have been measured using the activation method. The experiments were carried out at the ATOMKI cyclotron accelerator in the center of mass energy range from 8.7 to 13.7 MeV. Astrophysical S-factors have been calculated, and preliminary results are compared with statistical model predictions. [ABSTRACT FROM AUTHOR]

Published
2009
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