Intense radioactive-ion beams produced with the ISOL method

Köster, U.

doi:10.1007/978-3-642-55560-2_160

Cited by 4 publications

(4 citation statements)

References 57 publications

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“…The converter suppressed nearby caesium mass contamination and increased utilizable neutron-rich indium yields [43]. The neutron-deficient indium isotopes, 104−115 In, were produced by impinging the protons directly onto a thick LaC 2 target [44]. The indium isotopes diffused through the target material and their ionization was enhanced by the use of the resonant ionization ion source RILIS [45].…”

Section: Isotope Shift Measurementsmentioning

confidence: 99%

Analytic response relativistic coupled-cluster theory: the first application to indium isotope shifts

et al. 2020

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With increasing demand for accurate calculation of isotope shifts of atomic systems for fundamental and nuclear structure research, an analytic energy derivative approach is presented in the relativistic coupled-cluster (CC) theory framework to determine the atomic field shift and mass shift (MS) factors. This approach allows the determination of expectation values of atomic operators, overcoming fundamental problems that are present in existing atomic physics methods, i.e. it satisfies the Hellmann-Feynman theorem, does not involve any non-terminating series, and is free from choice of any perturbative parameter. As a proof of concept, the developed analytic response relativistic CC theory has been applied to determine MS and field shift factors for different atomic states of indium. High-precision isotope-shift measurements of -104 127 In were performed in the 246.8 nm (5p 2 P 3/2  9s 2 S 1/2 ) and 246.0 nm (5p 2 P 1/2  8s 2 S 1/2 ) transitions to test our theoretical results. An excellent agreement between the theoretical and measured values is found, which is known to be challenging in multi-electron atoms. The calculated atomic factors allowed an accurate determination of the nuclear charge radii of the ground and isomeric states of the -104 127 In isotopes, providing an isotone-independent comparison of the absolute charge radii.

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Section: Isotope Shift Measurementsmentioning

confidence: 99%

Analytic response relativistic coupled-cluster theory: the first application to indium isotope shifts

et al. 2020

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“…Exotic nuclides are produced by proton-induced reactions on a thick target, the material of which depends on the nuclides of interest (ISOL technique [Kos02]). The protons are currently supplied by CERN's proton-synchrotron booster (PSB) in pulses accelerated to 1.4 GeV kinetic energy, providing an average current of up to 2 µA.…”

Section: Production and Preparation Of The Ion Ensemblementioning

confidence: 99%

Binding Energy of Strongly Deformed Radionuclides

Manea

2015

Springer Theses

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The most complex nuclei are situated between the magic and the mid-shell ones, in regions known for sudden changes of the trends of nuclear observables. These are the so-called shape-transition regions, where the nuclear paradigm changes from the vibrational liquid drop to the static rotor. With few exceptions, nuclei in these regions are radioactive, with half-lives dropping into the millisecond range.Complementing the information obtained from the low-lying excitation spectrum, nuclear binding energies and mean-square charge radii are among the observables most sensitive to these changes of nuclear structure. In the present work, a study of the shapetransition phenomenon is performed by measurements of radioactive nuclides produced by the ISOLDE facility at CERN. The masses of the neutron-rich rubidium isotopes 98−100 Rb and of the neutron-deficient gold isotopes 180,185,188,190,191 Au are determined using the Penning-trap mass spectrometer ISOLTRAP. The mass of 100 Rb is determined for the first time. Significant deviations from the literature values are found for the isotopes 188,190 Au. A new experimental method is presented, using a recently developed multi-reflection time-of-flight mass spectrometer as a beam-analysis tool for resonanceionization laser spectroscopy. The new method opens the path to measurements of atomic hyperfine spectra with ISOLTRAP, from which charge radii and electromagnetic moments of radioactive nuclides can be extracted.The properties of the studied nuclides map the borders of two prominent regions of quadrupole deformation, which constrain the fine balance between pairing and quadrupole correlations in the nuclear ground states. This balance is studied by the Hartree-FockBogoliubov (HFB) approach. The sensitivity of the shape-transition phenomenon to the strength of pairing correlations is demonstrated. In particular, the strong odd-even staggering of charge radii in the mercury isotopic chain is shown to result in the HFB approach from the fine interplay between pairing, quadrupole correlations and quasiparticle blocking.

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“…The short lifetime of the 14 O (t 1/2 = 70.6 s) and 15 O (t 1/2 = 122.2 s) dictates a fast chemical extraction of the oxygen isotopes from the nitrogen target. Few experiments for extraction of 15 O from a nitrogen target were performed [16]. The main technique is to use a target of 1% hydrogen in natural nitrogen gas.…”

Section: Direct Reactionsmentioning

confidence: 99%

Light radio-isotopes for nuclear astrophysics and neutrino physics

Hass

Berkovits

Hirsh

et al. 2007

J. Phys. G: Nucl. Part. Phys.

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We present efforts to investigate and simulate the production, extraction and utilization of light radio-isotopes in research in nuclear astrophysics and fundamental nuclear and neutrino physics. The main technological novelty arises from the large fluxes of light radioactive beams that will be available using a high current LINAC beam of few mA, impinging on a specially designed appropriate target. Such high-intensity facilities will shortly be available at SPIRAL-II (GANIL, France) and at the SARAF accelerator (Soreq, Israel). The present paper concentrates on the following two categories: (1) production of 14O, 15O and 18Ne by direct interaction with a proton or deuteron beam and (2) production of 6He and 8Li by a two-stage reaction. These radioactive nuclei play a central and crucial role in the astrophysics issue of explosive nucleo-synthesis in the environment of, e.g., x-ray bursts. 6He, 8Li and 18Ne are important for studies of neutrino properties in general and in particular in ‘β-beam’ facilities. The expected increase of yield of several orders of magnitude will allow experiments that have not been possible hitherto, utilizing in an optimum manner the existing and newly planned detection systems for charged particles and γ-rays.

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Intense radioactive-ion beams produced with the ISOL method

Cited by 4 publications

References 57 publications

Analytic response relativistic coupled-cluster theory: the first application to indium isotope shifts

Analytic response relativistic coupled-cluster theory: the first application to indium isotope shifts

Binding Energy of Strongly Deformed Radionuclides

Light radio-isotopes for nuclear astrophysics and neutrino physics

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