The IGISOL technique—three decades of developments

Moore, I. D.; Dendooven, P.; Ärje, J.

doi:10.1007/s10751-013-0871-0

Cited by 46 publications

(28 citation statements)

References 74 publications

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“…Main contributors to a standard PWR antineutrino energy spectrum computed with the MURE code coupled with the list of nuclear data given in [12], assuming that they have been emitted by 235 U (52%), 239 Pu (33%), 241 Pu (6%)and 238 U (8.7%) for a 450 day irradiation time and using the summation method described in [12]. 92 Rb ions were produced via proton-induced fission on an uranium target at the IGISOL facility [26] in the accelerator Laboratory of the University of Jyväskylä (Finland). JYFLTRAP double Penning trap [27] was used for selecting with high precision only 92 Rb ions using the mass-selective buffer gas cooling technique [28].…”

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confidence: 99%

Total Absorption Spectroscopy Study ofRb92Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape

et al. 2015

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The antineutrino spectra measured in recent experiments at reactors are inconsistent with calculations based on the conversion of integral beta spectra recorded at the ILL reactor. 92 Rb makes the dominant contribution to the reactor antineutrino spectrum in the 5-8 MeV range but its decay properties are in question. We have studied 92 Rb decay with total absorption spectroscopy. Previously unobserved beta feeding was seen in the 4.5-5.5 region and the GS to GS feeding was found to be 87.5(25)%. The impact on the reactor antineutrino spectra calculated with the summation method is shown and discussed.

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confidence: 99%

Total Absorption Spectroscopy Study ofRb92Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape

et al. 2015

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“…Reaction products recoil into an inert buffer gas and are subsequently carried out in a supersonic gas jet. This allows for the study of a range of radionuclides which are not available at facilities where conventional thick targets are used (due to the physical or chemical properties of the products [29,30]). Various "ion guide" gas cell designs are available for fission, light-ion induced fusion evaporation and heavy-ion reactions, sputtering of macroscopic samples, and laser resonance ionization.…”

Section: Experimental Methodologymentioning

confidence: 99%

Isotope shifts from collinear laser spectroscopy of doubly charged yttrium isotopes

et al. 2018

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Isotope shifts from collinear laser spectroscopy of doubly charged yttrium isotopes Vormawah, L. J.; Vilén, Markus; Beerwerth, R.; Campbell, P.; Cheal, B.; Dicker, A.; Eronen, Tommi; Fritzsche, S.; Geldhof, Sarina; Jokinen, Ari; Kelly, S.; Moore, Iain; Reponen, Mikael; Rinta-Antila, Sami; Stock, S. O.; Voss, Annika Vormawah, L. J., Vilén, M., Beerwerth, R., Campbell, P., Cheal, B., Dicker, A., . . . Voss, A. (2018 Collinear laser spectroscopy has been performed on doubly charged ions of radioactive yttrium in order to study the isotope shifts of the 294.6-nm 5s 2 S 1/2 → 5p 2 P 1/2 line. The potential of such an alkali-metal-like transition to improve the reliability of atomic-field-shift and mass-shift factor calculations, and hence the extraction of nuclear mean-square radii, is discussed. Production of yttrium ion beams for such studies is available at the IGISOL IV Accelerator Laboratory, Jyväskylä, Finland. This newly recommissioned facility is described here in relation to the on-line study of accelerator-produced short-lived isotopes using collinear laser spectroscopy and application of the technique to doubly charged ions.

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“…In the upgraded facility, the fission of 232 Th and nat U induced by protons of the same energy were studied in various experimental campaigns. In both facilities, the proton beam from the K130 cyclotron was delivered to the ion guide [47], where the actinide target is mounted. The thicknesses of the 232 Th and nat U targets were 14 and 15 mg/cm 2 , respectively.…”

Section: Experimental Techniquementioning

confidence: 99%

“…The Ion Guide Isotope Separator On-Line (IGISOL) technique based on mass separation [45][46][47] is well suited for such experiments, as it is a fast and chemically insensitive method, facilitating measurements of short-lived fission products of any element. In case the isomeric yield ratios are measured by means of γ spectroscopy, as reported in Refs.…”

Section: Introductionmentioning

confidence: 99%

First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments

et al. 2018

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Publisher's PDF Rakopoulos, V.; Lantz, M.; Solders, A.; Al-Adili, A.; Mattera, A.; Canete, Laetitia; Eronen, Tommi; Gorelov, Dmitry; Jokinen, Ari; Kankainen, Anu; Kolhinen, Veli; Moore, Iain; Nesterenko, Dmitrii; Penttilä, Heikki; Pohjalainen, Ilkka; Rinta-Antila, Sami; Simutkin, V.; Vilén, Markus; Voss, Annika; Pomp, S.Rakopoulos, V., Lantz, M., Solders, A., Al-Adili, A., Mattera, A., Canete, L., . . . Pomp, S. (2018). First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments. Physical Review C, 98 (2) We report the first experimental determination of independent isomeric yield ratios using direct ion counting with a Penning trap, which offered such a high resolution in mass that isomeric states could be separated. The measurements were performed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyväskylä. The isomer production ratios of 81 Moreover, based on the isomeric yield ratios, the root-mean-square angular momenta (J rms ) of the fission fragments after scission were estimated using the TALYS code. The experimentally determined isomeric yield ratios, and consequently the deduced J rms , for 130 Sn are significantly lower compared to 128 Sn for both fissioning systems. This can be attributed to the more spherical shape of the fragments that contribute to the formation of 130 Sn, due to their proximity to the N = 82 shell closure. The values of J rms for 129 Sb are higher than 128 Sn for both reactions, despite the same neutron number of both nuclides (N = 78), indicating the odd-Z effect where fission fragments with odd-Z number tend to bear larger angular momentum than even-Z fragments. The isomer production ratio for the isotopes of Sn is more enhanced in the nat U(p, f ) reaction than in 232 Th(p, f ). The opposite is observed for 96 Y and 97 Y. These discrepancies might be associated to different scission shapes of the fragments for the two fission reactions, indicating the impact that the different fission modes can have on the isomeric yield ratios.

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The IGISOL technique—three decades of developments

Cited by 46 publications

References 74 publications

Total Absorption Spectroscopy Study ofRb92Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape

Total Absorption Spectroscopy Study ofRb92Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape

Isotope shifts from collinear laser spectroscopy of doubly charged yttrium isotopes

First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments

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