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The lifetimes of the 21/2(+) and 17/2(-) yrast states in Nb-89, Mo-89 and Tc-91 and of the 334 keV 5/2(-) state in Nb-87 were determined via the electronic timing method. The nuclei were populated by means of the VICKSI pulsed Ar-36 beam impinging on a Ni-58 target. The lifetimes measured for the first time are: Mo-89: 2271 keV 17/2(-) tau = 1.6(4) ns; 2584 keV 21/2(+) tau = 13.7(3) ns; Nb-87: 334
Studierektor för grundutbildning Kontaktinformation E-post: martin [dot] magnusson [at] fysik [dot] lu [dot] se Telefon: +46 46 222 14 10 Mobil: +46 73 086 48 53Organisation Fasta tillståndets fysik Besöksadress: Professorsgatan 1, Rumsnummer: B211 Hämtställe: 14 WebbplatsMartin Magnussons profil i Lunds universitets forskningsportalAndra roller Studierektor Nationellt Resurscentrum för Fysik Medl
https://www.fysik.lu.se/martin-magnusson - 2026-07-19
In this paper transient electromagnetic wave propagation in an inhomogeneous, cold plasma is considered. It is assumed that a constant magnetic induction is present and that the plasma is spatially inhomogeneous in the direction of the magnetic induction. Losses in the plasma are modeled with a collision frequency ν. The direct problem, which is to calculate the reflected and transmitted responses
This paper focuses on propagation of transient electromagnetic waves in waveguides of general cross section with perfectly conducting walls. The solution of the transient wave propagation problem relies on a wave splitting technique, which has been frequently used in direct and inverse scattering problems during the last decade. The field in the waveguide is represented as a time convolution of a
The sea elevation at a fixed point is modeled as a sum of Gaussian process plus a quadratic random correction term. It is shown that the process can also be written as a quadratic form of a vector valued Gaussian process with arbitrary mean. The saddlepoint method is used to approximate the intensity μ(u), say, the sea level crosses the level u. The accuracy of the proposed method is studied. In e
We study and classify firing waves in two-dimensional oscillator lattices. To do so, we simulate a pulse-coupled oscillator model aimed to resemble a group of pacemaker cells in the heart. The oscillators are assigned random natural frequencies, and we focus on frequency entrained states. Depending on the initial condition, three types of wave landscapes are seen asymptotically. A concentric lands
In this paper transient electromagnetic wave propagation in an inhomogeneous, cold plasma is considered. It is assumed that a constant magnetic induction is present and that the plasma is spatially inhomogeneous in the direction of the magnetic induction. Losses in the plasma are modeled with a collision frequency ν. The direct problem, which is to calculate the reflected and transmitted responses
Photocatalytic water splitting has become a promising strategy for converting solar energy into clean and carbon-neutral solar fuels in a low-cost and environmentally benign way. Hydrogen gas is such a potential solar fuel/energy carrier. In a classical artificial photosynthetic system, a photosensitizer is generally associated with a co-catalyst to convert photogenerated charge into (a) chemical
Universitetslektor Kontaktinformation E-post: david [dot] tenenbaum [at] mgeo [dot] lu [dot] se Telefon: +46 46 222 48 82Organisation Miljö- och geovetenskapliga institutionen (MGeo) Rumsnummer: 357 Hämtställe: 16 WebbplatsDavid Tenenbaums profil i Lunds universitets forskningsportal Publikationer Visar av publikationer. Sorterade efter år och sen titel. Filtrera efter typ AllaArtikel i vetenskapl
https://www.nateko.lu.se/sv/david-tenenbaum - 2026-07-19
Quantum dots embedded within nanowires represent one of the most promising technologies for applications in quantum photonics. Whereas the top-down fabrication of such structures remains a technological challenge, their bottom-up fabrication through self-assembly is a potentially more powerful strategy. However, present approaches often yield quantum dots with large optical linewidths, making repr
Semiconductor InSb nanowires present a highly intriguing platform with immense potential for applications in spintronics and topological quantum devices. The narrow band gap exhibited by InSb allows for precise tuning of these nanowires, facilitating smooth transitions between the electron-transport region and the hole-transport region. In this paper, we demonstrate quantum transport measurements
A central challenge in water electrolysis lies with the oxygen evolution reaction (OER) where the formation of molecular oxygen (O2) is hindered by the constraint of angular momentum conservation. While the reactants OH− or H2O are diamagnetic (DM), the O2 product has a paramagnetic (PM) triplet ground state, requiring a change in spin configuration when being formed. This constraint has prompted
The aim of this essay is to acquire enhanced knowledge about the views and the strategies that Sikh immigrants of the first generation, who reside in the province of Skåne in Sweden, are using for becoming integrated into the Swedish society. From my own participation in some of the activities that have been organized by the Sikh community in Malmö I became interested in issues regarding integrati
