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37 results on '"Roeckl, Ernst"'

3. Proton-proton correlations observed in two-proton radioactivity of 94Ag

Author

Mukha, Ivan, Roeckl, Ernst, Batist, Leonid, Blazhev, Andrey, Doring, Joachim, Grawe, Hubert, Grigorenko, Leonid, Huyse, Mark, Janas, Zenon, Kirchner, Reinhard, La Commara, Marco, Mazzocchi, Chiara, Tabor, Sam L., and Van Duppen, Piet

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): Ivan Mukha (corresponding author) [1, 2, 3, 10]; Ernst Roeckl [1]; Leonid Batist [4]; Andrey Blazhev [1, 5]; Joachim Doring [1]; Hubert Grawe [1]; Leonid Grigorenko [6]; Mark Huyse [...]

Published
2006
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9. Nuclear spectroscopy with copper isotopes of extremes N/Z ratios

Author

Köster, Ulli, Eberth, Jürgen, Habs, Dieter, Von Egidy, Till, Faust, Herbert, Fedoseyev, Valentin, Franchoo, Serge, Friedrichs, Thomas, Gross, Martin, Huyse, Marc, Lettry, Jacques, Mishin, Viatcheslav, Mueller, Wilhelm, Ott, Jürgen, Ravn, Helge, Roeckl, Ernst, Rudolph, Dirk, Schwalm, Dirk, Thirolf, Peter, and Van Duppen, Piet

Subjects
Detectors and Experimental Techniques
Published
1997

15. REVIEWING THIRTY YEARS OF RESEARCH AT THE GSI ONLINE MASS SEPARATOR.

Author

Roeckl, Ernst

Subjects
*ATOMIC mass, *NUCLEAR facility decommissioning, *NUCLEAR structure, *NUCLEAR shapes, *NUCLEAR astrophysics
Abstract

Seven years ago, the GSI Online Mass Separator was decommissioned after 30 years of operation. The Golden Age of Jan Żylicz, celebrated at this Conference, is an adequate occasion to review the research performed at this facility. Its programme reached from nuclear-structure studies based on decay spectroscopy -- the focus of this contribution -- to investigations of nuclear shapes by means of laser spectroscopy all the way to experiments of astrophysical and fundamental-physics relevance. Reviewing this work I shall present my personal view on, firstly, examples of technical and scientific highlights and, secondly, the "humanistic" aspect of collaborating with many colleagues from abroad, including in particular Jan Żylicz and his associates from the University of Warsaw. [ABSTRACT FROM AUTHOR]

Published
2012
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17. ONE-PROTON AND TWO-PROTON RADIOACTIVITY OF THE (21+) ISOMER IN 94Ag.

Author

ROECKL, ERNST

Subjects
*PROTONS, *RADIOACTIVITY, *NUCLEAR isomers, *NUCLIDES, *NUCLEAR reactions, *NUCLEAR models
Abstract

The properties observed for the one-proton and two-proton radioactivity of the (21+) isomer in 94Ag are briefly summarized. The occurrence of both types of radioactivity from one and the same nuclear state is a unique phenomenon on the entire chart of nuclides. In particular, the first observation of energy correlations for two-proton radioactivity is discussed in comparison with predictions obtained from of a three-body breakup model. On the basis of this comparison it is tentatively suggested that the two protons are emitted simultaneously either from one of the poles or from opposite poles of a strongly deformed nucleus. Future experimental and theoretical studies are sketched which may help to explain this puzzling result. [ABSTRACT FROM AUTHOR]

Published
2006
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18. Proton–proton correlations observed in two-proton radioactivity of 94Ag.

Author

Mukha, Ivan, Roeckl, Ernst, Batist, Leonid, Blazhev, Andrey, Döring, Joachim, Grawe, Hubert, Grigorenko, Leonid, Huyse, Mark, Janas, Zenon, Kirchner, Reinhard, La Commara, Marco, Mazzocchi, Chiara, Tabor, Sam L., and Van Duppen, Piet

Subjects
*PROTON-proton interactions, *NUCLEAR reactions, *COLLISIONS (Nuclear physics), *NUCLEAR energy, *NUCLEAR physics, *RADIOACTIVITY, *RADIATION
Abstract

The stability and spontaneous decay of naturally occurring atomic nuclei have been much studied ever since Becquerel discovered natural radioactivity in 1896. In 1960, proton-rich nuclei with an odd or an even atomic number Z were predicted to decay through one- and two-proton radioactivity, respectively. The experimental observation of one-proton radioactivity was first reported in 1982, and two-proton radioactivity has now also been detected by experimentally studying the decay properties of 45Fe (refs 3, 4) and 54Zn (ref. 5). Here we report proton–proton correlations observed during the radioactive decay of a spinning long-lived state of the lightest known isotope of silver, 94Ag, which is known to undergo one-proton decay. We infer from these correlations that the long-lived state must also decay through simultaneous two-proton emission, making 94Ag the first nucleus to exhibit one- as well as two-proton radioactivity. We attribute the two-proton emission behaviour and the unexpectedly large probability for this decay mechanism to a very large deformation of the parent nucleus into a prolate (cigar-like) shape, which facilitates emission of protons either from the same or from opposite ends of the ‘cigar’. [ABSTRACT FROM AUTHOR]

Published
2006
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21. Spallation Reactions in Applied and Fundamental Research

Author

Benlliure, J., Beig, R., editor, Beiglböck, W., editor, Domcke, W., editor, Englert, B.-G., editor, Frisch, U., editor, Hänggi, P., editor, Hasinger, G., editor, Hepp, K., editor, Hillebrandt, W., editor, Imboden, D., editor, Jaffe, R. L., editor, Lipowsky, R., editor, Löhneysen, H. v., editor, Ojima, I., editor, Sornette, D., editor, Theisen, S., editor, Weise, W., editor, Wess, J., editor, Zittartz, J., editor, Al-Khalili, Jim, editor, and Roeckl, Ernst, editor

Published
2006
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22. Gamma-Ray Arrays: Past, Present and Future

Author

Gelletly, W., Eberth, J., Beig, R., editor, Beiglböck, W., editor, Domcke, W., editor, Englert, B.-G., editor, Frisch, U., editor, Hänggi, P., editor, Hasinger, G., editor, Hepp, K., editor, Hillebrandt, W., editor, Imboden, D., editor, Jaffe, R. L., editor, Lipowsky, R., editor, Löhneysen, H. v., editor, Ojima, I., editor, Sornette, D., editor, Theisen, S., editor, Weise, W., editor, Wess, J., editor, Zittartz, J., editor, Al-Khalili, Jim, editor, and Roeckl, Ernst, editor

Published
2006
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23. Nuclear Halos and Experiments to Probe Them

Author

Riisager, K., Beig, R., editor, Beiglböck, W., editor, Domcke, W., editor, Englert, B.-G., editor, Frisch, U., editor, Hänggi, P., editor, Hasinger, G., editor, Hepp, K., editor, Hillebrandt, W., editor, Imboden, D., editor, Jaffe, R. L., editor, Lipowsky, R., editor, Löhneysen, H. v., editor, Ojima, I., editor, Sornette, D., editor, Theisen, S., editor, Weise, W., editor, Wess, J., editor, Zittartz, J., editor, Al-Khalili, Jim, editor, and Roeckl, Ernst, editor

Published
2006
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24. Isotope Separation On Line and Post Acceleration

Author

Van Duppen, P., Beig, R., editor, Beiglböck, W., editor, Domcke, W., editor, Englert, B.-G., editor, Frisch, U., editor, Hänggi, P., editor, Hasinger, G., editor, Hepp, K., editor, Hillebrandt, W., editor, Imboden, D., editor, Jaffe, R. L., editor, Lipowsky, R., editor, Löhneysen, H. v., editor, Ojima, I., editor, Sornette, D., editor, Theisen, S., editor, Weise, W., editor, Wess, J., editor, Zittartz, J., editor, Al-Khalili, Jim, editor, and Roeckl, Ernst, editor

Published
2006
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25. Nuclear Moments

Author

Neugart, R., Neyens, G., Beig, R., editor, Beiglböck, W., editor, Domcke, W., editor, Englert, B.-G., editor, Frisch, U., editor, Hänggi, P., editor, Hasinger, G., editor, Hepp, K., editor, Hillebrandt, W., editor, Imboden, D., editor, Jaffe, R. L., editor, Lipowsky, R., editor, Löhneysen, H. v., editor, Ojima, I., editor, Sornette, D., editor, Theisen, S., editor, Weise, W., editor, Wess, J., editor, Zittartz, J., editor, Al-Khalili, Jim, editor, and Roeckl, Ernst, editor

Published
2006
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37. Nuclear Halos and Experiments to Probe Them

Author

K. Riisager, Al-Khalili, Jim, and Roeckl, Ernst

Subjects
Nuclear reaction, Physics, Nuclear Theory, Halo nucleus, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Decoupling (cosmology), Beta decay, Nuclear physics, medicine.anatomical_structure, medicine, Halo, Nuclear Experiment, Nucleon, Scaling, Nucleus, Astrophysics::Galaxy Astrophysics
Abstract

Halo nuclei are characterized by an approximate decoupling - spatially and dynamically - of one or two nucleons from the remaining nucleus. This lecture identifies the key features of halo systems and reviews scaling relations that enable halos in different systems to be compared. Regions where halos have been seen or are likely to be found are outlined. A general overview is given of how halos are studied experimentally followed by a more detailed discussion on nuclear reaction experiments at energies above 20 MeV/u and on halo effects in beta decay.

Published
2006

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