A5073656301- Nuclear Physics and Applications
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Mass Spectrometry Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced NMR Techniques and Applications
- Diamond and Carbon-based Materials Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Nuclear Materials and Properties
- Superconducting Materials and Applications
- Ion-surface interactions and analysis
- Fusion materials and technologies
- Nuclear reactor physics and engineering
- Rare-earth and actinide compounds
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Radiation Therapy and Dosimetry
- Radioactive Decay and Measurement Techniques
- Muon and positron interactions and applications
- Physics of Superconductivity and Magnetism
- Neutrino Physics Research
- Plasma Diagnostics and Applications
- Superconducting and THz Device Technology
European Organization for Nuclear Research
2007-2025
Swansea University
2013
University of Oxford
1996-2000
The ISOLDE facility has undergone numerous changes over the last 17 years driven by both physics and technical community with a common goal to improve on beam variety, quality safety. Improvements have been made in civil engineering operational equipment while continuing developments aim ensure operations following potential increase primary intensity energy. This paper outlines principal incurred at building similar publication of upgrades Kugler (2000 Hyperfine Interact. 129 23–42). It...
A gas-filled segmented linear Paul trap has been installed at the focal plane of high-resolution separator (HRS) CERN-ISOLDE. As well as providing beams with a reduced transverse emittance, this device is also able to accumulate ions and release sample in bunches well-defined time structure. This recently permitted collinear laser spectroscopy stable radioactive bunched be demonstrated ISOLDE. Surface-ionized 39, 44, 46K 85Rb were accelerated 30keV, mass separated injected into for...
We have observed beta-delayed proton emission from the neutron-rich nucleus 11Be by analysing a sample collected at ISOLDE facility CERN with accelerator mass spectrometry (AMS). With branching ratio of (8.4 +- 0.6) 10^{-6} strength this decay mode, as measured B(GT)-value, is unexpectedly high. The result discussed within simple single-particle model and could be interpreted quasi-free halo neutron into single-proton state.
For the first time, laser resonance photo-ionization technique has been applied inside a FEBIAD-type ion source at an ISOL facility. This was achieved by combining ISOLDE RILIS with variant of FEBIAD (the VADIS) in series off-line and on-line tests CERN. The immediate applications these developments include coupling molten targets introduction two new modes operation: element selective mode + VADIS for increased efficiency compared to operation alone. functionality demonstrated gallium...
The first fully on-line use of the angular distribution beta emission in detection NMR nuclei oriented at low temperatures is reported. magnetic moments single valence particle, intermediate mass, isotopes 67Ni(nup(-1)(1/2);1/2(-)) and 69Cu(pip(1)(3/2);3/2(-)) are measured to be +0.601(5) &mgr;(N) +2.84(1) &mgr;(N), respectively, revealing only a small deviation from neutron p(1/2) single-particle value former large proton p(3/2) latter. Quantitative interpretation given terms core...
On-line \ensuremath{\beta}-NMR measurements on nuclei oriented at low temperatures of the magnetic dipole moment $^{71}\mathrm{Cu}$($N=42$) are reported, with result $\ensuremath{\mu}$($^{71}\mathrm{Cu}$)$=+2.28(1)$ nuclear magneton (n.m.). The value shows a significant difference from $\ensuremath{\mu}$($^{67}\mathrm{Cu}$)$=+2.54(2)$ n.m., revealing asymmetry respect to $N=40$. This effect presents challenge theoretical interpretation.
Irradiation tests are continuously needed at the European Organization for Nuclear Research (CERN), to experimentally assess radiation tolerance of commercial non-metallic materials use in high-radiation areas. The 'Radiation Materials' R2M activity organizes such and provides expertise interpretation results, design upgrade devices absorbing critical doses during their lifetime. various activities covered by presented. Up ten irradiation per year organized external <sup...
We present results from the development towards Time-of-Flight Laser Ion Source (ToF-LIS) aiming for suppression of isobaric contaminants through fast beam gating. The capability to characterize high resistance ion sources has been successfully demonstrated. A ninefold selectivity gain achieved surface ionized potassium, while maintaining >90% transmission laser-ionized gallium using a thin wall graphite ionizer cavity combined with gate. Initial investigation glassy carbon as potential hot...
This paper reports measurements made using the technique of online nuclear orientation which reexamine \ensuremath{\gamma} decay isomeric ${}^{180}{\mathrm{Hf}}^{\mathrm{m}}$ and specifically 501 keV ${8}^{\ensuremath{-}}$--${6}^{+}$ transition. The irregular admixture $E2$ to $M2/E3$ multipolarity in this transition, deduced from forward-backward asymmetry its angular distribution, has for decades stood as prime evidence parity mixing states. experiment, based on ion implantation newly...
Positron annihilation in room temperature samples of the molecular gases N2, O2, CO, N2O and CH4 has been studied density range below 10 amagat using positron lifetime technique. Careful analyses dependence free rates have performed that allowed parameter, 〈Zeff〉, to be extracted. We compare our results those literature, give recommended 〈Zeff〉 values from experiment. also synthesized existing data for H2 derived a value parameter this molecule.