Magnetic moments of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>68</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mi>g</mml:mi><mml:mo>,</mml:mo><mml:mi>m</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>70</mml:

Weissman, L.; Köster, U.; Catherall, R.; Franchoo, S.; Georg, U.; Jönsson, O.; Fedoseyev, V. N.; Mishin, V. I.; Seliverstov, M. D.; Roosbroeck, J. Van; Gheysen, Stijn; Huyse, M.; Kruglov, K.; Neyens, G.; Duppen, P. Van

doi:10.1103/physrevc.65.024315

Cited by 58 publications

(22 citation statements)

References 30 publications

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“…[21] and references therein). In the case of 68;70 Cu [22], following the selection of isomeric beams, experiments such as Coulomb excitation [23] and mass measurements [24] have been performed. However, these experiments suffered from isobaric contamination, as well as significant ground-state contamination due to the Doppler broadening of the hyperfine resonances of each isomer [1].…”

Section: Introductionmentioning

confidence: 99%

Decay-Assisted Laser Spectroscopy of Neutron-Deficient Francium

et al. 2014

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This paper reports on the hyperfine-structure and radioactive-decay studies of the neutron-deficient francium isotopes [202][203][204][205][206] Fr performed with the Collinear Resonance Ionization Spectroscopy (CRIS) experiment at the ISOLDE facility, CERN. The high resolution innate to collinear laser spectroscopy is combined with the high efficiency of ion detection to provide a highly sensitive technique to probe the hyperfine structure of exotic isotopes. The technique of decay-assisted laser spectroscopy is presented, whereby the isomeric ion beam is deflected to a decay-spectroscopy station for alpha-decay tagging of the hyperfine components. Here, we present the first hyperfine-structure measurements of the neutron-deficient francium isotopes [202][203][204][205][206] Fr, in addition to the identification of the low-lying states of 202;204 Fr performed at the CRIS experiment.

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Section: Introductionmentioning

confidence: 99%

Decay-Assisted Laser Spectroscopy of Neutron-Deficient Francium

et al. 2014

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“…Following the series of experiments on the study of nuclear spins and electromagnetic moments of Cu isotopes [56,[78][79][80] the in-source RIS collaboration has performed extensive laser and nuclear-spectroscopic studies of isotopes in the lead region, namely the Tl [81], Pb [70,[82][83][84], Hg [45], Bi [85], Po [43,77,86,87], At and Au chains [22,88]. Our recent activity in this field has revisited the neutron-deficient Au and Hg isotopes, which were first studied at ISOLDE approximately four decades ago: the very first optical spectroscopy experiments performed at an ISOL facility [89][90][91][92].…”

Section: In-source Rismentioning

confidence: 99%

Ion beam production and study of radioactive isotopes with the laser ion source at ISOLDE

Fedosseev

Wendt

Rothe

et al. 2017

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

122

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Ion beam production and study of radioactive isotopes with the laser ion source at ISOLDE At ISOLDE the majority of radioactive ion beams are produced using the resonance ionization laser ion source (RILIS). This ion source is based on resonant excitation of atomic transitions by wavelength tunable laser radiation.Since its installation at the ISOLDE facility in 1994, the RILIS laser setup has been developed into a versatile remotely operated laser system comprising state-of-the-art solid state and dye lasers capable of generating multiple high quality laser beams at any wavelength in the range of 210-950 nm. A continuous programme of atomic ionization scheme development at CERN and at other laboratories has gradually increased the number of RILIS-ionized elements. At present, isotopes of 40 different elements have been selectively laser-ionized by the ISOLDE RILIS. Studies related to the optimization of the laser-atom interaction environment have yielded new laser ion source types: the laser ion source and trap and the versatile arc discharge and laser ion source. Depending on the specific experimental requirements for beam purity or versatility to switch between different ionization mechanisms, these may offer a favourable alternative to the standard hot metal cavity configuration. In addition to its main purpose of ion beam production, the RILIS is used for laser spectroscopy of radioisotopes. In an ongoing experimental campaign the isotope shifts and hyperfine structure of long isotopic chains have been measured by the extremely sensitive in-source laser spectroscopy method. The studies performed in the lead region were focused on nuclear deformation and Made open access 7 August 2017Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.shape coexistence effects around the closed proton shell Z = 82. The paper describes the functional principles of the RILIS, the current status of the laser system and demonstrated capabilities for the production of different ion beams including the high-resolution studies of short-lived isotopes and other applications of RILIS lasers for ISOLDE experiments.

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“…The isomeric beams were produced in a similar way as in Refs. [2][3][4]15], where narrow-band laser scans provided the optimum values of the laser frequency that maximize the ionization of the different isomers [17]. The 6 − and 3 − beams of 70 Cu, post-accelerated by the radioactive beam experiment (REX) at ISOLDE [18] up to 2.8 MeV/nucleon, were used to bombard a 120 Sn 2.3 mg/cm 2 target inducing Coulomb excitation.…”

Section: Methodsmentioning

confidence: 99%

“…The isomeric beam contamination stemmed from the broadening of the hyperfine-split resonances of each isomer [2,3,15,21], as clearly shown in Fig. 1 taken from Ref.…”

Section: Methodsmentioning

confidence: 99%

“…The other members of these multiplets in 68,70 Cu were tentatively identified using nucleon-transfer reactions [14], mass measurements, and β-decay studies [2,3]. These long-lived isomeric states were also investigated using laser spectroscopy [6,15], whereby the spin and parity were firmly fixed to 1 + , 3 − , and 6 − in the case of 70 Cu and 1 + and 6 − in case of 68 Cu. Thanks to recent developments in resonant-laser ionization and post-acceleration, energetic isomeric beams have been produced; and soon after, this opportunity was used to perform pioneering Coulomb excitation (Coulex) studies of the 6 − state in 68,70 Cu [4].…”

Section: Introductionmentioning

confidence: 99%

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Coulomb excitation of the 3−isomer in70Cu

Rapisarda¹,

Stefanescu²,

Balabanski³

et al. 2011

Phys. Rev. C

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Post-accelerated isomerically purified radioactive beams, available at the CERN On-Line Isotope Mass Separator facility using the resonant ionization laser technique, have been used to study the Coulomb excitation of the I π = 3 − state in 70 Cu (Z = 29, N = 41). While first results using a I π = 6 − beam were reported previously, the present complementary experiment allows us to complete the study of the multiplet of states (3 − , 4 − , 5 − , 6 − ) arising from the π 2p 3/2 ν1g 9/2 configuration. Besides the known γ -ray transition deexciting the 4 − state, a ground-state γ ray of 511(3) keV was observed for the first time and was unambiguously associated with the 5 − state deexcitation. This observation fixes the energy, spin, and parity of this state, completing the low-energy level scheme of 70 Cu. B(E2) values for all possible E2 transitions within the multiplet were determined. A comparison with large-scale shell model calculations using different interactions and valence spaces shows the importance of proton excitation across the Z = 28 shell gap and the role of the 2d 5/2 neutron orbital.

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Magnetic moments of68Cug,mand70

Cited by 58 publications

References 30 publications

Decay-Assisted Laser Spectroscopy of Neutron-Deficient Francium

Decay-Assisted Laser Spectroscopy of Neutron-Deficient Francium

Ion beam production and study of radioactive isotopes with the laser ion source at ISOLDE

Coulomb excitation of the 3−isomer in70Cu

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