A5073518936- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Nuclear physics research studies
- Atomic and Molecular Physics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Mass Spectrometry Techniques and Applications
- Magnetic confinement fusion research
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Advanced Chemical Physics Studies
- Muon and positron interactions and applications
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Fusion materials and technologies
- Anesthesia and Sedative Agents
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Radiation Detection and Scintillator Technologies
- Anesthesia and Neurotoxicity Research
- Radiation Therapy and Dosimetry
- Medical Imaging Techniques and Applications
- Cellular and Composite Structures
- Quantum, superfluid, helium dynamics
- Ion-surface interactions and analysis
GSI Helmholtz Centre for Heavy Ion Research
2016-2024
Max Planck Institute for Plasma Physics - Greifswald
2017-2024
Helmholtz Institute Mainz
2020
Johannes Gutenberg University Mainz
2020
Max Planck Institute for Nuclear Physics
2002-2016
Columbia University
2016
Weizmann Institute of Science
2016
European Organization for Nuclear Research
2003-2014
Max Planck Society
2002-2012
Kantonsspital Graubünden
2012
The Miniball germanium detector array has been operational at the REX (Radioactive ion beam EXperiment) post accelerator Isotope Separator On-Line facility ISOLDE CERN since 2001. During last decade, a series of successful Coulomb excitation and transfer reaction studies have performed with this array, utilizing unique high-quality radioactive beams which are available ISOLDE. In article, an overview is given technical details full setup, including description $\gamma$ -ray particle...
An electrostatic cryogenic storage ring, CSR, for beams of anions and cations with up to 300 keV kinetic energy per unit charge has been designed, constructed, put into operation. With a circumference 35 m, the ion-beam vacuum chambers all beam optics are in cryostat cooled by closed-cycle liquid helium system. At temperatures as low (5.5 ± 1) K inside time constants several minutes almost an hour were observed atomic molecular, anion cation at 60 keV. The intensity, energy-dependent...
The first excited ${2}^{+}$ state of the unstable isotope $^{110}\mathrm{Sn}$ has been studied in safe Coulomb excitation at $2.82\text{ }\text{ }\mathrm{MeV}/u$ using MINIBALL array REX-ISOLDE post accelerator CERN. This is measurement reduced transition probability this method for a neutron deficient Sn isotope. strength approach lies excellent peak-to-background ratio that achieved. extracted probability,...
At the radioactive ion beam facility REX-ISOLDE, neutron-rich zinc isotopes were investigated using low-energy Coulomb excitation. These experiments have resulted in $B(E2,{2}_{1}^{+}\ensuremath{\rightarrow}{0}_{1}^{+})$ values $^{74\ensuremath{-}80}\mathrm{Zn}$, $B(E2,{4}_{1}^{+}\ensuremath{\rightarrow}{2}_{1}^{+})$ $^{74,76}\mathrm{Zn}$ and determination of energy first excited ${2}_{1}^{+}$ states $^{78,80}\mathrm{Zn}$. The produced by high-energy proton- $(A=74,76,80)$ neutron- $(A=78)$...
We report on the realization and operation of a fast ion beam trap linear electrostatic type employing liquid helium cooling to reach extremely low blackbody radiation temperature residual gas density and, hence, long storage times more than 5 min which are unprecedented for keV beams. Inside pipe that can be cooled temperatures <15 K, with 1.8 K reached in some locations, an pulse stored at kinetic energies 2-20 between two mirrors. Along overview cryogenic design, we present measurement...
Neutron-rich, radioactive Zn isotopes were investigated at the Radioactive Ion Beam facility REX-ISOLDE (CERN) using low-energy Coulomb excitation. The energy of 2(1)+ state in 78Zn could be firmly established and for first time 2+ --> 0(1)+ transition 80Zn was observed 1492(1) keV. B(E2,2(1)+ 0(1)+) values extracted (74,76,78,80)Zn compared to large scale shell model calculations. With only two protons outside Z=28 proton core, is lightest N=50 isotone which spectroscopic information has...
We report on the first low-energy Coulomb excitation measurements with radioactive Ipi=6- beams of odd-odd nuclei 68,70Cu. The were produced at ISOLDE, CERN and post-accelerated by REX-ISOLDE to 2.83 MeV/nucleon. Gamma rays detected MINIBALL spectrometer. 6- beam was used study multiplet states (3-, 4-, 5-, 6-) arising from pi2p3/2 nu 1g9/2 configuration. 4- state populated via B(E2;6--->4-) value determined in both nuclei. results obtained illustrate fragile stability Z=28 shell N=40...
Automatic controllers capable of regulating multiple patient outputs for higher-quality anesthesia treatment are described. The first steps toward the development an autonomous system at authors' laboratory presented. implemented on a real-time platform and tested humans to quantify benefits that may result from their use in routine practice. To date, staff University Hospital Bern can rely regulate six different outputs. Overall, more than 150 patients were treated with closed-loop during...
We report on the first radioactive beam experiment performed at recently commissioned REX-ISOLDE facility CERN in conjunction with highly efficient gamma spectrometer MINIBALL. Using 30Mg ions accelerated to an energy of 2.25 MeV/u together a thin (nat)Ni target, Coulomb excitation excited 2+ states projectile and target nuclei well below barrier was observed. From measured relative deexcitation gamma-ray yields B(E2;0(+)gs-->2(+)1) value determined be 241(31)e2 fm4. Our result is lower than...
Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of $^{70}\mathrm{Se}$ was postaccelerated to energy 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the target nuclei were deduced by recording deexcitation $\ensuremath{\gamma}$ rays highly segmented MINIBALL $\ensuremath{\gamma}$-ray spectrometer coincidence with scattered particles silicon detector. At these energies, yield first ${2}^{+}$ state is expected be strongly...
Wendelstein 7-X, the world's largest superconducting stellarator in Greifswald (Germany), started plasma experiments with a water-cooled plasma-facing wall 2022, allowing for long pulse operation. In parallel, project was launched 2021 to develop W based divertor, replacing current CFC demonstrate performance of reactor relevant facing materials low tritium retention. The consists two tasks: Based on experience from previous experimental campaigns and improved physics modelling, geometry...
The B(E2;0+→2+) value in Ni68 has been measured using Coulomb excitation at safe energies. radioactive beam was postaccelerated the CERN on-line isotope mass separator (ISOLDE) facility to 2.9 MeV/u and directed a Pd108 target. emitted γ rays were detected by MINIBALL detector array. Not only directly registered but also indirectly deduced information on nucleus emitting ray used perform Doppler correction, leading larger center-of-mass angular range infer cross section. obtained of...
The isotopes Cd122,124,126 were studied in a “safe” Coulomb-excitation experiment at the radioactive ion-beam facility REX-ISOLDE CERN. reduced transition probabilities B(E2;0g.s.+→21+) and limits for quadrupole moments of first 2+ excited states three determined. onset collectivity vicinity Z=50 N=82 shell closures is discussed by comparison with model beyond mean-field calculations.2 MoreReceived 20 December 2013DOI:https://doi.org/10.1103/PhysRevC.89.014313©2014 American Physical Society
Abstract The soft x-ray tomography diagnostic in the stellarator Wendelstein 7-X consists of twenty pinhole cameras, up–down symmetrically arranged a poloidal, triangular cross-section plasma vessel. emissivity is measured with 16 bit amplitude resolution at 2 MHz sampling rate along 360 lines-of-sight by silicon photodiode arrays. In recent operation campaign data acquisition (DAQ) has been working reliable for conducted pulse lengths <1 min, however DAQ system are ready foreseen 30 min...
Background and objective: Operating room management structures interrelationships both within the operating suite with other departments in hospital can be very complex. Several different professional support groups are represented that often have infrastructures of their own may compete or conflict hierarchy room. Today, there is little actual as an entity. We surveyed current Switzerland.Methods: A questionnaire was sent to chief anaesthesiologists all public hospitals Switzerland. It...
The decay of excited aluminum-cluster anions (Al${}_{n}^{\ensuremath{-}}$, $n=4$ and 5) has been investigated in a cryogenic linear ion-beam trap. A power-law is found to accurately reproduce the time dependence observed rates at early storage times, although exponents are significantly larger than typically $1/t$ decay. It shown that exponent is, most, weakly dependent on cluster electron affinity heat capacity. previous model for small clusters also be disagreement with both species....