Perspectives for spectroscopy of actinides with highly brilliant beams

P. G. Thirolf, L. Csige, M. Günther, D. Habs, A. Krasznahorkay

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Presently two new research facilities are either already under construction ('MEGa-Ray' at Lawrence Livermore National Laboratory/US) or soon ready to start construction (ELI-Nuclear Physics in Bucharest/Romania), both aiming to provide highly brilliant γ beams with so far unprecedented properties (ca. 10 13 photons/s, energy resolution ≤10 -3) via Compton-backscattering of laser photons from a high-quality relativistic electron beam. With these intense, monochromatic γ beams, a new era of photonuclear physics will be enabled. It is envisaged to exploit the novel beams for highly-selective studies of extremely deformed nuclei in the multiple-humped potential energy landscape of the actinides via photofission. We will be able to populate gateway states in the first potential minimum of nuclei, predominantly originating from collective states in the (superdeformed) second or (hyperdeformed) third potential minimum, tunnelling back into the first well. The γ beam energy resolution of 10 -3 will allow to resolve individual resonances due to the lower level density in the higher potential minima. Excited states in these minima can be rather selectively populated with much larger intensities than achieved with former methods based on light-ion induced reactions. Also the large background from prompt fission with σ isomerprompt ≈ 10 -5 is avoided. Hence a detailed γ spectroscopy in the second and third minimum will be enabled.

Original languageEnglish
Pages (from-to)227-232
Number of pages6
JournalActa Physica Polonica B
Volume43
Issue number2
DOIs
Publication statusPublished - Feb 2012

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spectroscopy
Romania
research facilities
nuclei
relativistic electron beams
light ions
photons
nuclear physics
fission
backscattering
rays
isomers
potential energy
physics
energy
excitation
lasers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Perspectives for spectroscopy of actinides with highly brilliant beams. / Thirolf, P. G.; Csige, L.; Günther, M.; Habs, D.; Krasznahorkay, A.

In: Acta Physica Polonica B, Vol. 43, No. 2, 02.2012, p. 227-232.

Research output: Contribution to journalArticle

Thirolf, P. G. ; Csige, L. ; Günther, M. ; Habs, D. ; Krasznahorkay, A. / Perspectives for spectroscopy of actinides with highly brilliant beams. In: Acta Physica Polonica B. 2012 ; Vol. 43, No. 2. pp. 227-232.
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