ELFT HÍRADÓ

[<vera.horvath AT eli-alps.hu>]

Meghívó az ELI-ALPS szemináriumára

Előadó: Krasznahorkay Attila (MTA-ATOMKI)
Cím: Perspectives for photofission research at the ELI - Nuclear Physics
facility

Időpont: 2016. január 22. 9 óra
Helyszín: Szeged, Tisza Lajos krt. 85-87.

Az előadás rövid összefoglalója:
The perspectives for photofission experiments at the new Extreme Light
Infrastructure - Nuclear Physics (ELI-NP) facility will be discussed from a
point of view of the necessary detector developments.
        Photofission measurements enable selective investigation of extremely
deformed nuclear states in the light actinides and can be utilized to better
understand the landscape of the multiple-humped potential energy surface (PES)
in these nuclei. High resolution studies will be performed on the mass, atomic
number, and kinetic energy distributions of the fission fragments following
the decay of states in the first, second and third minima of the PES in the
region of the light actinides. We aim at investigating the heavy
clusterization and the predicted cold valleys of the fission potential.
Moreover, a special focus on the fission dynamics and clusterization effects
in super- (SD) and hyperdeformed (HD) compound states will be addressed. Such
fission barrier parameters are crucial inputs also for cross section
calculations in the Thorium-Uranium fuel cycle of 4th generation nuclear power
plants.
        These studies call for developments of state-of-the-art fission
detectors to exploit the unprecedented properties of the high-flux, Compton
backscattered γ-beams having a very small beam spot size. A multi-target
detector array will be discussed, which is under development at MTA Atomki,
consisting of position sensitive gas detector modules based on the state-of-
the-art THGEM technology. For the measurement of the mass and atomic number
distribution of the fission fragments a highly-efficient, five-folded, Frisch-
gridded twin-ionization chamber (used as Bragg ionization chamber), which is
also under development at Atomki, will be discussed.  The chamber will be
equipped with double-sided Si strip detectors in order to measure light
particle emission probability from the highly-deformed compound state and to
detect ternary particles from fission. Atomic numbers will be extracted by
tracking the range of the fragments using fast digitizers and advanced digital
signal processing (DSP) techniques.

A szeminárium angol nyelvű. Minden érdeklődőt szívesen látunk.