HELIOS

Heavy Element Laser Ionization Spectroscopy

Coordinatore	KATHOLIEKE UNIVERSITEIT LEUVEN    more Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie.
Nazionalità Coordinatore	Belgium [BE]
Totale costo	2˙458˙397 €
EC contributo	2˙458˙397 €
Programma	FP7-IDEAS-ERC Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	ERC-2011-ADG_20110209
Funding Scheme	ERC-AG
Anno di inizio	2012
Periodo (anno-mese-giorno)	2012-03-01   -   2017-02-28

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	KATHOLIEKE UNIVERSITEIT LEUVEN  Organization address address: Oude Markt 13 city: LEUVEN postcode: 3000 contact info Titolo: Dr. Nome: Stijn Cognome: Delauré Email: send email Telefono: +32 16 320944 Fax: +32 16 324198	BE (LEUVEN)	hostInstitution	2˙458˙397.20
2	KATHOLIEKE UNIVERSITEIT LEUVEN  Organization address address: Oude Markt 13 city: LEUVEN postcode: 3000 contact info Titolo: Prof. Nome: Pieter Cognome: Van Duppen Email: send email Telefono: +32 16 327272 Fax: +32 16 327985	BE (LEUVEN)	hostInstitution	2˙458˙397.20

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 Obiettivo del progetto (Objective)

'The aim of this proposal is to develop a novel laser-spectroscopy method and to study nuclear and atomic properties of heaviests elements in order to address the following key questions: - Is the existence of the heaviest isotopes determined by the interplay between single-particle and collective nucleon degrees of freedom in the atomic nucleus? - How do relativistic effects and isotopic composition influence the valence atomic structure of the heaviest elements?

The new approach is based on in-gas jet, high-repetition, high-resolution laser resonance ionization spectroscopy of short-lived nuclear-reaction products stopped in a buffer gas cell. The final goal is to couple the new system to the strongest production facility under construction at the ESFRI-listed SPIRAL-2 facility at GANIL (France) and to study isotopes from actinium to nobelium and heavier elements. An increase of the primary intensity, efficiency, selectivity and spectral resolution by one order of magnitude compared to present-day techniques is envisaged, which is essential to obtain the required data .

The challenges are: - decoupling the high-intensity heavy ion production beam (> 10^14 particles per second) from the low-intensity reaction products (few atoms per second) - cooling of the reaction products from MeV/u to meV/u within less then hundred milliseconds - separating the wanted from the, by orders of magnitude overwhelming, unwanted isotopes - performing high-resolution laser spectroscopy on a minute amount of atoms in an efficient way.

Nuclear properties (charge radii, nuclear moments and spins) as well as atomic properties (transition energies and ionization potentials) will be deduced in regions of the nuclear chart where they are not known: the neutron-deficient isotopes of the actinide elements, up to nobelium (Z = 102) and beyond. The data will validate state-of-the-art calculations, identify critical weaknesses and guide further theoretical developments.'