Zeit, Ort:

16:30 Uhr, Seminar room Lindner 339, Gentner lab, 2nd floor

Redner:

Prof. Julian Heeck (Virginia)

Titel:

Tba.

Zeit, Ort:

09:30 Uhr, Central Seminar Room, library building

Redner:

Mareike Dinger

Titel:

Investigating electron interaction cross sections with molecular building blocks of human tissue

Zeit, Ort:

11:15 Uhr, Grosser Hoersaal/Big Lecture Hall (library)

Redner:

Prof. Yury Litvinov

Titel:

Heavy-ion storage rings for nuclear astrophysics

Storage of freshly produced secondary particles in a storage ring is a straightforward way to achieve the most efficient use of the rarest species. In this way, the same secondary ion can pass an internal target multiple times thereby increasing the reaction luminosity. Or, one can `simply' observe the behavior of a particle in the magnetic field to learn about its basic properties. Employing storage rings for precision physics experiments with highly charged ions (HCI) at the intersection of atomic, nuclear, plasma and astrophysics is a rapidly developing field of research. Its success is vitally connected to the advancement of accelerator technologies and beam manipulation techniques.The number of physics cases is enormous which cannot be covered in a single presentation. In the focus here will be the most recent results obtained at the Experimental Storage Ring ESR of GSI in Darmstadt and the Experimental Cooler-Storage Ring CSRe of IMP in Lanzhou. Both the ESR and CSRe rings are coupled to in-flight fragment separators and are employed for precision mass and lifetime measurements of short-lived rare nuclei. At CSRe, the enabled determination of the velocity of every stored particle -in addition to its revolution frequency-has boosted the sensitivity and precision, such that a single, short-lived ion is now sufficient to precisely obtain its mass. Among recent highlights is the constrained matter flow though 64Ge waiting point in the rp-process nucleosynthesis. At the ESR, the focus is laid on the non-destructive monitoring of individual particles, which is the prerequisite for decay studies of HCIs. Radioactive decays of HCIs can be very different from the ones known in neutral atoms. Some decay channels can be blocked while new ones can become open. Such decays reflect electron shell-nucleus interactions and are relevant for atomic physics and nuclear structure as well as for nucleosynthesis in stellar objects. One recent highlight is the direct measurement of the two-photon nuclear decays.The experiments performed at the ESR and CSRe will be put in the context of the present research programs in a worldwide context. Furthermore, thanks to fascinating results obtained at the presently operating storage rings, a number of new facilities is planned.

Zeit, Ort:

09:30 Uhr, Otto-Hahn-Hörsaal, Bibliotheksgebäude

Redner:

apl.Prof. Dr. Stefan Jordan, ARI/ZAH, Univ. Heidelberg

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