Seminar: New γ-Beams, New γ-Optics, New Secondary Beams: Neutrons, Positrons, Neutrinos

With the planned new γ-beam facilities like MEGa-ray at LLNL (USA) or ELI-NP at Bucarest (Rumania) with 10¹³γ/s and a band width of ∆Eγ/Eγ ≈ 10⁻³ a new era of γ beams comes in operation, compared to the present best HIγS facility at Duke University (USA) with 10⁷γ/s and ∆Eγ/Eγ ≈ 3 ∗ 10⁻². At the same time new exciting possibilities open up to focus γ beams orders of magnitude better than at present. Here we describe a new experiment at the GAMS4 facility with the γ beam of the high flux reactor at ILL (Grenoble, France). Also several orders of magnitude more efficient monochromators for γ beams are being developed. Thus we have to optimize the total system: the γ beam facility, the γ beam optics and γ detectors for each experiment in an integrated way. We can trade γ intensity for band width, going down up to ∆Eγ/Eγ ≈ 10⁻⁶ and address individual nuclear levels. We discuss the main strong M1 and E1 excitations like the sissors mode, the two-phonon quadrupole octupole excitations, pygmy dipole excitations or giant dipole excitations under the new facet of applications. We find many new applications in biomedicine, green energy, radioactive waste management or homeland security. We focus on many orders of magnitude more brilliant secondary beams of neutrons, positrons and possibly even neutrinos.

Datum

06.02.2012

Zeit

14:45–15:45

Ort

Physics HS3

Garching, Garching, Deutschland

Speaker

Prof. D. Habs, LMU Munich and MPQ Munich

Veranstalter

TUM/FRM II

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