By OECD Publishing

With a declining variety of nuclear facts evaluators on the earth and an expanding call for for top of the range facts, there's a hazard that evaluators will pay attention to generating new nuclear information to the detriment of constructing new types and techniques for eva

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Extra resources for Perspectives on Nuclear Data for the Next Decade: Workshop Proceedings -- Bruyeres-le-Châtel, France, 26-28 September 2005

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Especially, the effects on the single particle spectra and pairing properties are investigated. 3 Effective mass, single particle spectra and pairing properties The average level density at the Fermi surface scales with the effective mass as: gq (εF,q ) ≈ 2m∗q 3 Nq , 4 (¯ hkF,q )2 where Nq is the particle number, m∗q the effective mass, and kF,q the Fermi momentum for a given nucleon species. Indeed, with the new parameterization, the increase of the effective mass leads to single particle spectra which are compressed with respect to those obtained with D1S.

4), who show an impressive fit of only 375 keV, the global models all give practically the same fit of about 700 keV. This observation prompted Bohigas and Leboeuf ([29] and hopefully, these proceedings) to suggest that perhaps the idea of chaos, or fluctuations in the periodic orbits of particles in the nuclear potential, contrive to limit the possibilities in calculation of the nuclear binding energy. This interesting idea has been taken up by others, notably Hirsch et al. M. Pearson in [5]). 1 0 Figure 4: The root-mean-square difference between experimental masses (of the AME1995) and different mass models (global approaches on the left and local, on the right).

MISTRAL is a good example of such a technique. As a transmission, time-of-flight spectrometer using a radiofrequency “clock”, its measurement technique is very fast and as it determines the ion cyclotron frequency, it is very accurate [17]. In 2003 MISTRAL measured the mass of 11 Li (a “superlarge” nuclide - see [18]) with an accuracy of 5 keV (see Bachelet et al. in [9]). MISTRAL is located at the mother of all ISOL facilities: ISOLDE, where a few meters of beamline separate it from ISOLTRAP, the mother of all on-line Penning trap installations .

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