The new CERN-ISOLDE on-line mass-separator facility at the PS-Booster

Kugler, E.; Fiander, D.C.; Johnson, B.W.; Haas, H.; Przewloka, A.; Ravn, H.L.; Simon, Daniel; Zimmer, K.

doi:10.1016/0168-583x(92)95907-9

Cited by 203 publications

(71 citation statements)

References 7 publications

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“…The implantation took place at the CERN/ISOLDE facility [6], where pure beams of radioactive elements are pr oduced, providing a large variety of isotopes for EC. During the implantation, a 7º tilt angle from the crystal surface was applied in order to reduce channeling of the 111 Ag atoms and to achieve a well-defined depth The Ag lattice site location was subsequently evaluated by comparing the experimental emission channeling patterns with theoretical ones by means of the two-dimensional fitting procedure outlined in Ref [5].…”

Section: Methodsmentioning

confidence: 99%

Lattice site and stability of implanted Ag in ZnO

Rita

Wahl

Lopes

et al. 2003

Physica B: Condensed Matter

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In this work we report on the lattice location of implanted Ag in ZnO single-crystals, evaluated by means of the emission channeling technique. Following 60 keV low dose (2×10 13 cm −2 ) ion implantation, the β − emission patterns from 111 Ag were monitored with a position-sensitive detector as a function of annealing temperature up to 800ºC in vacuum. Our experiments revealed that in the as-implanted state around 30% of the Ag atoms are substitutional at the Zn site with root mean square displacements around 0.17-0.28 Å. Though this fraction did not change with increasing annealing temperature, upon annealing at 600°C the root mean square displacement of Ag from the Zn site increased considerably, followed by partial outdiffusion during 800°C annealing.

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Section: Methodsmentioning

confidence: 99%

Lattice site and stability of implanted Ag in ZnO

Rita

Wahl

Lopes

et al. 2003

Physica B: Condensed Matter

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“…Similarly to refs. [15,16], Hg-1212 samples were implanted with 199m Hg (T 1/2 = 42 min) at the ISOLDE/CERN facility [17]. After implantation, the effect of high oxygen pressure during the measurement was investigated.…”

Section: Methodsmentioning

confidence: 99%

Perturbed Angular Correlations Studies in the HgBa2CaCu2O6+δ high-TC Superconductor

Mendonça¹,

Correia²,

Haas³

et al. 2010

J Supercond Nov Magn

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The electric field gradients at 199m Hg nuclei have been measured via the perturbed angular correlation (PAC) technique, allowing a full characterization of the Hg neighborhood charge distribution at high oxygen doping on the Hg planes. The PAC technique has been applied to investigate the effect of high oxygen pressure during the measurement. Polycrystalline HgBa 2 CaCu 2 O 6+δ (Hg-1212) samples have been annealed at 152 bar pressurized oxygen. The influence of oxygen pressure during the experiment was then investigated by measuring the samples at atmospheric pressure and under 152 bar oxygen pressure.The present set of PAC experiments shows that at high oxygen concentrations there is a non-uniform oxygen distribution. Moreover, the Hg environment is not free from oxygen and the results hint to a new type of ordering.

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“…The PAC experiments have been performed by first implanting the samples with 111m Cd (T 1/2 =49 min) to a low dose of 1.0×10 12 at/cm 2 and 30 keV energy at the ISOLDE/CERN facility [6]. After implantation, the samples were annealed at 973K in air, for 20 min to remove implantation damage [7].…”

Section: Methodsmentioning

confidence: 99%

Perturbed angular correlations investigations on YMnO3 multiferroic manganite

et al. 2010

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The Perturbed Angular Correlation (PAC) technique was applied to study the yttrium local environment in YMnO 3 multiferroic manganite. The electric field gradients (EFG) at the Y site have been measured as function of temperature, covering both ferroelectric and magnetic transitions. The results were compared with point charge model (PCM) calculations.The experimental results show two different EFG distributions for all temperatures. Only one can be directly attributed to the yttrium crystalline site in the hexagonal structure.

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The new CERN-ISOLDE on-line mass-separator facility at the PS-Booster

Cited by 203 publications

References 7 publications

Lattice site and stability of implanted Ag in ZnO

Lattice site and stability of implanted Ag in ZnO

Perturbed Angular Correlations Studies in the HgBa2CaCu2O6+δ high-TC Superconductor

Perturbed angular correlations investigations on YMnO3 multiferroic manganite

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