Selective atomic photoionization and its use in isotope separation and spectroscopy

Abstract

We continue our study of the stability of designer gravity theories, where one considers anti-de Sitter gravity coupled to certain tachyonic scalars with boundary conditions defined by a smooth function W . It has recently been argued that there is a lower bound on the conserved energy in terms of the global minimum of W , if the scalar potential arises from a superpotential P and the scalar reaches an extremum of P at infinity. We show, however, that there are superpotentials for which these bounds do not hold.PACS number:

Preliminary studies of in-cell electrophoresis as 6Li enrichment technique

“…FNT commonly assumes large scale Li-enrichment capabilities to be achievable at the required scale for future fusion power reactors, even though only small quantities of 6 Li are today reported compared to the future requirements.…”

“…Lithium shows excellent thermodynamic properties and heat transfer and low cross section for neutron absorption, so it is used as a primary coolant acidity control agent of PWR fission reactor. Therefore, 6 Li appearing as a future primary fuel for next D-T fusion should be produced at large scale and civil procurement technologies to assure its future supply and availability.…”

“…The most tritium breeding systems conceived today, as those to be prospectively tested in ITER as test blanket modules, tritium breeding capabilities (TBR < 1.18) depend, in a certain extend, on the 6 Li enrichment and the concept of the breeder blanket itself.…”

“…Ranges of 6 6 Li enrichment means about 47 tones of pure 6 Li per GWe (PbLi eutectic breeding blanket DCLL case). Therefore 6 Li control and on-line enrichment techniques should also be prospected for DEMOs R&D programmes.…”

“…The 6 Li has a high neutron capture cross-section (947 barns), commonly exploited for shielding, neutronic control and in the tritium breeding in fusion. Lithium shows excellent thermodynamic properties and heat transfer and low cross section for neutron absorption, so it is used as a primary coolant acidity control agent of PWR fission reactor.…”