An On-Line Laser Ion Source Based on Resonance Photoionization in a Gas Cell

Vermeeren, L.; Bijnens, N.; Huýse, M.; Kudryavtsev, Yuri; Duppen, P. Van; Wauters, J.; Qamhieh, Z. N.; Thoen, Peter; Vandeweert, Erno; Silverans, Roger

doi:10.1103/physrevlett.73.1935

Cited by 49 publications

(29 citation statements)

References 19 publications

(8 reference statements)

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“…The rf-sextupole has the advantage of a higher overall mass resolution and better transmission efficiency. A laser ion source has also recently been developed [11] based upon resonance ionisation in a gas cell [12,13] and variations thereof [14]. Developments in ion guide technology [8] have shown that the addition of inguide electric fields improves the extraction efficiency and reduces the evacuation time of radioactive ions.…”

Section: -2351mentioning

confidence: 99%

An ion guide for the production of a low energy ion beam of daughter products of α-emitters

Tordoff

Eronen

Elomaa

et al. 2006

Nuclear Instruments and Methods in Physics Research Section B:

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A new ion guide has been modeled and tested for the production of a low energy (≈ 40 kV) ion beam of daughter products of alpha-emitting isotopes. The guide is designed to evacuate daughter recoils originating from the α-decay of a 233 U source. The source is electroplated onto stainless steel strips and mounted along the inner walls of an ion guide chamber. A combination of electric fields and helium gas flow transport the ions through an exit hole for injection into a mass separator. Ion guide efficiencies for the extraction of 229 Th + (0.06%), 221 Fr + (6%), and 217 At + (6%) beams have been measured. A detailed study of the electric field and gas flow influence on the ion guide efficiency is described for two differing electric field configurations.

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Section: -2351mentioning

confidence: 99%

An ion guide for the production of a low energy ion beam of daughter products of α-emitters

Tordoff

Eronen

Elomaa

et al. 2006

Nuclear Instruments and Methods in Physics Research Section B:

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“…This method has been proposed in 1992 [4] and subsequently intensively studied (first at LISOL) and developed [5][6][7][8][9][10][11][12][13]. Known as In-Gas Laser Ionization and Spectroscopy (IGLIS), it is based on stopping of nuclear reaction products in a gas cell and subsequent selective resonance laser ionization [5][6][7][8][9][10][11][12][13].…”

Section: Experimental Methodsmentioning

confidence: 99%

Production and investigation of heavy neutron rich nuclei

et al. 2017

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Abstract.A project devoted to the production and study of neutron rich heavy nuclei (GALS -project) is being realized at Flerov Laboratory for Nuclear Reactions (FLNR) -JINR. GALS is planned to exploit available beams from the U-400M cyclotron in low energy multi-nucleon transfer reactions to study exotic neutronrich nuclei located in the "north-east" region of nuclear map. Products from 4.5 to 9 MeV/nucleon heavy-ion collisions, such as 136 Xe on 208 Pb, are to be captured in a gas cell and selectively laser-ionized in a sextupole (quadrupole) ion guide extraction system.

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“…[1]. In recent years, diverse attempts have been started to improve the intensities of refractory elements at mass separators, such as the use of He-jet systems after nuclear reactions [2] or the development of on-line laser ion sources [3]. However, the intensities as obtained until now are still relatively small.…”

Section: Measurements Of the Electric Quadrupole Moment Of Nb And Zr mentioning

confidence: 99%

Measurements of the Electric Quadrupole Moment of Nb and Zr Isotopes with Modulated Adiabatic Fast Passage after Recoil Implantation into hcp Co

et al. 1998

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We report a new method for the measurement of quadrupole moments of radioactive nuclei which were not accessible with other techniques until now: modulated adiabatic fast passage on oriented nuclei (MAPON) after recoil implantation into hcp Co. Quadrupole moments of Zr and Nb isotopes were determined which are interesting in the context of the proton and the neutron effective charge at A ϳ 90. [S0031-9007(97) PACS numbers: 21.10. Ky, 76.60.Gv, 76.80. + y Electric quadrupole moments of nuclear states are a measure for the nonsphericity of the electric charge density, which may originate from single-particle and collective nuclear properties. Thus, measurements of electric quadrupole moments may yield essential nuclear structure information. The standard method for the measurement of electric quadrupole moments of radioactive nuclei is laser spectroscopy (LS). Until now, the application of LS has been restricted mainly to nonrefractory elements. This is due to the fact that at on-line mass separators-such as ISOLDE at CERN-radioactive ion beams with high intensity are available only for nonrefractory elements. For only selected systems, laser desorption of daughter isotopes-which are not available in a primary beamhas been applied successfully; see, e.g., Ref.[1]. In recent years, diverse attempts have been started to improve the intensities of refractory elements at mass separators, such as the use of He-jet systems after nuclear reactions [2] or the development of on-line laser ion sources [3]. However, the intensities as obtained until now are still relatively small. Therefore another method would be desirable, with which quadrupole moments of radioactive nuclei can be measured, independent of the fact whether or not these are refractory. Here we introduce such a method, which is applicable to all elements throughout the nuclear chart: modulated adiabatic fast passage on oriented nuclei (MAPON) after recoil implantation into hcp-Co single crystals. The MAPON technique was introduced by Callaghan et al. [4,5]. It allows the determination of quadrupole splittings which are small in comparison to the magnetic inhomogeneous broadening. The power of the MAPON technique has not been recognized for long. This is due to the fact that mostly polycrystalline Fe had been used as host lattice for MAPON measurements. Because of the cubic symmetry the quadrupole interaction-it originates from an unquenched orbital momentum-is small. In addition, it is inhomogeneously broadened, the broadening being of the same order of magnitude as the total splitting. This is due to the fact that, as detected recently [6], the electric field gradient (EFG) at the impurity site in Fe depends strongly on the direction of magnetization with respect to the crystallographic axes. Therefore single crystal hcp Co as host lattice was supposed to be superior: The EFG originating from the noncubic lattice symmetry is well defined and, in addition, much larger than the EFG in Fe. In this case, however, the radioactive nuclei have to be implanted. ...

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An On-Line Laser Ion Source Based on Resonance Photoionization in a Gas Cell

Cited by 49 publications

References 19 publications

An ion guide for the production of a low energy ion beam of daughter products of α-emitters

An ion guide for the production of a low energy ion beam of daughter products of α-emitters

Production and investigation of heavy neutron rich nuclei

Measurements of the Electric Quadrupole Moment of Nb and Zr Isotopes with Modulated Adiabatic Fast Passage after Recoil Implantation into hcp Co

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