1. |
- Rakityansky, S. A., et al.
(författare)
-
Pade approximation of the S-matrix as a way of locating quantum resonances and bound states
- 2007
-
Ingår i: J PHYS A-MATH THEOR. - : IOP Publishing. - 1751-8113. ; 40:49, s. 14857-14869
-
Tidskriftsartikel (refereegranskat)abstract
- It is shown that the spectral points (bound states and resonances) generated by a central potential of a single-channel problem, can be found using rational parametrization of the S-matrix. To achieve this, one only needs values of the S-matrix along the real positive energy axis. No calculations of the S-matrix at complex energies or a complex rotation are necessary. The proposed method is therefore universal in that it is applicable to any potential (local, non-local, discontinuous, etc) provided that there is a way of obtaining the S-matrix (or scattering phase shifts) at real collision energies. Besides this, combined with any method that extracts the phase shifts from the scattering data, the proposed rational parametrization technique would be able to do the spectral analysis using the experimental data.
|
|
2. |
|
|
3. |
- Sims, D. A., et al.
(författare)
-
The He(γ,n) reaction: a potential testing ground for the alpha-particle wavefunction
- 1998
-
Ingår i: Physics Letters B. - 0370-2693. ; 442:1-4, s. 43-47
-
Tidskriftsartikel (refereegranskat)abstract
- Differential cross sections (σ(Eγ,θn)) for the He(γ,n) reaction have been measured at Eγ=50–71 MeV and θn=30–120°. These data are compared with theoretical predictions where a microscopic calculation of the He and He wavefunctions has been made within the Alt-Grassberger-Sandhas, integral-equation formalism.
|
|
4. |
- Hirscher, Michael, et al.
(författare)
-
Materials for hydrogen-based energy storage - past, recent progress and future outlook
- 2020
-
Ingår i: Journal of Alloys and Compounds. - : Elsevier BV. - 0925-8388 .- 1873-4669. ; 827
-
Tidskriftsartikel (refereegranskat)abstract
- Globally, the accelerating use of renewable energy sources, enabled by increased efficiencies and reduced costs, and driven by the need to mitigate the effects of climate change, has significantly increased research in the areas of renewable energy production, storage, distribution and end-use. Central to this discussion is the use of hydrogen, as a clean, efficient energy vector for energy storage. This review, by experts of Task 32, Hydrogen-based Energy Storage of the International Energy Agency, Hydrogen TCP, reports on the development over the last 6 years of hydrogen storage materials, methods and techniques, including electrochemical and thermal storage systems. An overview is given on the background to the various methods, the current state of development and the future prospects. The following areas are covered; porous materials, liquid hydrogen carriers, complex hydrides, intermetallic hydrides, electrochemical storage of energy, thermal energy storage, hydrogen energy systems and an outlook is presented for future prospects and research on hydrogen-based energy storage.
|
|