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High spin states in the nucleus Tc-89 have been studied via the fusion evaporation reaction Ni-58(Ca-40,2 alpha p)Tc-89 at 180 MeV beam energy. The NORDBALL gamma-ray spectrometer equipped with auxiliary detectors for light particle selection was used to measure gamma gamma- and particle-gamma gamma coincidences. Some 60 transitions were placed into a level scheme comprising 38 levels reaching up
The large body of recently measured energies and electromagnetic properties of high-spin states in the Z = 40-45, N = 46-50 isotopes is consistently accommodated in the shell model using empirical and schematic two-body matrix elements in the (1g(9/2), 2p(1/2)) model space. In particular, we test the purity of seniority, the effects of an enlarged model space (including the 1f(5/2), 2p(3/2) orbits
High-spin states of the neutron deficient nucleus Nb-88 have been studied following the reaction Fe-56 (Cl-35, 2pn) Nb-88 at 120 and 123 MeV bombarding energy. Neutron gated and pure gamma gamma-coincidences were measured with a neutron-gamma gamma-coincidence setup; in addition gamma gamma-coincidences were detected with the OSIRIS-cube at the Cologne tandem accelerator. Via the analysis of gamma
The three superdeformed (SD) bands in Ce-132 and the two SD bands in Ce-131 have been extended to higher spin following experiments with the EUROBALL IV spectrometer. The two SD bands in 131Ce have been linked together. However, despite the relatively high population intensity of the bands ( up to 5% of the respective channel), it has not been possible to unambiguously link any of the five SD band
We investigate the two-particle spin entanglement in magnetic nanoclusters described by the periodic Anderson model. An entanglement phase diagram is obtained, providing an important perspective on a central property of magnetic nanoclusters, namely, the temperature-dependent competition between local Kondo screening and nonlocal Ruderman-Kittel-Kasuya-Yoshida spin ordering. We find that multipart
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
- A PhD Interview with Ervin Ascic How can cancer cells be turned against themselves? Ervin Ascic, a Ph.D. student at Lund University’s Lund Stem Cell Center, has spent his doctoral studies exploring the answer to this question. On September 3 at 15:00, he will publicly defend his thesis, which investigates a new approach to cancer immunotherapy: using gene therapy to reprogram tumor cells into im
https://www.stemcellcenter.lu.se/research-school-stem-cell-biology/phd-interview-ervin-ascic - 2026-07-17
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
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
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
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
