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Jakub Wiśniewski (University of Warsaw)Contributed talk
Angular correlation measurements and direct linear polarization measurements are
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powerful tools for identifying the spins and parities of excited nuclear states involved in a γ-ray cascade, and for measuring the multipole orders and mixing ratios of transitions. Though the physical angular correlations are fully calculable from first principles, experimental effects can make the extraction of... -
Dr Sorin PASCU (IFIN-HH)Contributed talk
We present preliminary results from a recent investigation performed at ILL to study the presence of the negative-parity components in the structure of positive-parity states in atomic nuclei. In order to identify the candidates for such states one has to investigate the excited states in medium mass nuclei around N=88 using various probes. The first experiment was performed in Munich and was...
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Yung Hee KimContributed talk
The future upgrade of the FIPPS [1] (FIPPS phase2) aims to i) explore the exotic neutron-rich nuclei region of the nuclear chart with higher selectivity ii) explore the dynamics of the fission process such as generation of spin in fission. To achieve this goal, detection and identification of the fragments produced after neutron induced fission is necessary independent from multiple gamma-ray...
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Javier Rodriguez Murias (Institut Laue-Langevin)
The evolution of shell structure far from the β stability line is one of the great challenges over the past two decades. Neutron rich nuclei near magic numbers show modifications in their properties as expected by shell model calculations that uses traditional shell closures. For the study of these nuclei, the ADT (Advanced Delayed Technique) βγγ(t) technique is used. This technique was...
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Dr A. Dhal (Extreme Light Infrastructure-Nuclear Physics (ELI-NP), Bucharest – Magurele, 077125,Romania)Contributed talk
The upcoming high brilliance gamma beam facility at ELI-NP (Extreme Light Infrastructure – Nuclear Physics) will open up a new horizon on nuclear physics research by photo-induced nuclear reaction mechanisms. One of the processes, Nuclear Resonance Fluorescence (NRF), is a very effective way to measure and study basic nuclear properties. The NRF process is highly important as both the...
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Prof. Alexandrina Petrovici (IFIN-HH)
Neutron-rich A∼100 nuclei relevant for the astrophysical r-process and nuclear reactor
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related issues manifest sudden variations of particular nuclear properties in some isotopic
chains, a more smooth transition in some others, and exotic shape isomers induced by triple shape
coexistence in some nuclei. Our recent investigations represent an attempt to a comprehensive
understanding of shape... -
Lukas KNAFLA
In early 2018, fast-timing experiments were performed using the FIPPS spectrometer. The setup consisted of eight HPGe clover detectors and was equipped with 16 ancillary ultra fast LaBr$_{3}$(Ce) timing detectors. This contribution discusses the assembly and properties of the mounted fast-timing setup while giving insight into problems and their respective solutions. The principle of lifetime...
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Felix KandziaContributed talk
Prompt gamma-ray spectroscopy of fission fragments allows to study neutron rich nuclei in the mass range around 80 < A < 160. One limitation of this type of studies is the intrinsic gamma-ray background originating from beta decays of instable fission fragments. In order to reduce this background an active fission target was developed for FIPPS, designed to distinguish between fission events...
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Thomas Materna (DPhN, IRFU, CEA Saclay)Contributed talk
Nuclear fission is a complex process, for which an microscopic description is challenging. Most of the energy of the process is transferred into kinetic energy : fragments are repulsed by Coulomb force according to their shape evolution after the scission point. How exactly the remaining energy is shared between the two fragments is one of the open questions on the fission process. Another one...
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Lukasz ISKRAContributed talk
For the neutron number N = 60, a sudden onset of the deformation has been observed in Y isotopes at the ground state, which is manifested by the presence of rotational bands (e.g. [1]). On the other hand, the occurrence of shape coexistence in nuclei with N = 58 and 59, in this region (e.g. [2]), suggests that the evolution of the deformation is a more gradual process. Our goal was to...
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Dr F. Crespi (University of Milan and INFN)Contributed talk
Lifetime measurements allow extraction of fundamental information on the nature of the excited states of a nuclear system. Since nuclear lifetimes cover many orders of magnitude, a number of experimental techniques and detection setups have been developed depending on the range of the lifetime of interest. The Gamma-ray Induced Doppler Shift Attenuation (GRIDSA) Method presented here is...
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Adina Olacel (Horia Hulubei National Institute for Physics and Nuclear Engineering)Contributed talk
Neutron and proton inelastic cross section measurements were performed at the GELINA neutron source of EC-JRC, Geel, Belgium and at the 9 MV Tandem accelerator of IFIN-HH, Magurele, Romania. The talk will explain the practical importance of these cross sections, will describe the experimental setup and will emphasize the quality of the results.
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Dr Jonathan Wilson (IPN Orsay)Contributed talk
An experimental campaign to perform prompt and delayed spectroscopy of the fission fragments from the 238U(n,f) and 232Th(n,f) reactions has been recently carried out. The seven-week-long campaign was performed with the nu-ball spectrometer coupled to the LICORNE directional fast neutron source based at the ALTO facility of the IPN Orsay and invloved a large international collaboration. These...
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Ulli KoesterContributed talk
Certain (n,gamma) and (n,fission) experiments with high physics interest have not been performed yet due to non-availability of suitable targets. I will review the availability and possible production of rare isotope targets that would enable such experiments.
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Martin von Tresckow (Institut für Kernphysik, Technische Universität Darmstadt)Contributed talk
After the successful observation of an isovector octupole state in $\mathrm{^{144}Nd}$ in the EXILL campain 2013 [1], we performed at FIPPS (phase 1) a coincident $\mathrm{^{145}Nd}(n,\gamma\gamma)$ experiment to study the level structure of $\mathrm{^{146}Nd}$. The $\mathrm{^{145}Nd}(n,\gamma\gamma)$ is well suited to search for isovector octupole states because the neutron capture state of...
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Simone Bottoni (Università degli Studi di Milano and INFN)Contributed talk
The structure of Ca isotopes between N=20 and N=28 is crucial to understand the evolution of single-particle states and collectivity from symmetric to neutron-rich systems. Moreover, new experimental results may serve as a benchmark for the most advanced theoretical models, such as state-of-the-art shell model calculations [1] and ab-initio approaches, employing chiral two- and three-nucleon...
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