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Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in $^{217,218,219}\mathrm{At}$ revealed by in-source laser spectroscopy
/ Barzakh, A E (St. Petersburg, INP) ; Cubiss, J G (York U., England) ; Andreyev, A N (York U., England ; JAEA, Ibaraki ; CERN) ; Seliverstov, M D (St. Petersburg, INP ; York U., England) ; Andel, B (Comenius U.) ; Antalic, S (Comenius U.) ; Ascher, P (Heidelberg, Max Planck Inst.) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Beck, D (Darmstadt, GSI) ; Bieroń, J (Jagiellonian U.) et al.
Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in $^{217,218,219}$At have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. [...]
2019 - 9 p.
- Published in : Phys. Rev. C 99 (2019) 054317
Article from SCOAP3: PDF;
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$Q_{\textrm{EC}}$-value determination for $^{21}$Na$\rightarrow^{21}$Ne and $^{23}$Mg$\rightarrow^{23}$Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at ISOLDE/CERN
/ Karthein, J. (CERN ; Heidelberg, Max Planck Inst.) ; Atanasov, D. (Heidelberg, Max Planck Inst.) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Breitenfeldt, M. (CERN) ; Bondar, V. (Leuven U.) ; George, Sebastian ; Hayen, L. (Leuven U.) ; Lunney, D. (CSNSM, Orsay) ; Manea, V. (CERN) ; Mougeot, M. (CSNSM, Orsay) et al.
We report on high-precision $Q_{\textrm{EC}}$ values of the $^{21}$Na$\rightarrow^{21}$Ne and $^{23}$Mg$\rightarrow^{23}$Na mirror $\beta$-transitions from mass measurements with ISOLTRAP at ISOLDE/CERN. A precision of $\delta m/m = 9 \cdot 10^{-10}$ and $\delta m/m = 1.5 \cdot 10^{-9}$ was reached for the masses of $^{21}$Na and $^{23}$Mg, respectively. [...]
arXiv:1906.01538.-
2019-07-16 - 7 p.
Fulltext: PDF;
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Charge breeding of CO$^{+}$ beams at REX-ISOLDE
/ Pitters, J (CERN) ; Breitenfeldt, M (CERN) ; Wenander, F (CERN)
The β+ emitter 11C is a possible treatment ion for hadron therapy owing to its excellent properties in PET imaging, which could be used for range verification during the treatment. A charge breeder is required to transform the molecular CO+ beam, coming from an ISOL-production stage (Isotope Separation OnLine), to Cn+ and to match it with the acceptance of the medical accelerator. [...]
2018 - 3 p.
- Published in : AIP Conf. Proc. 2011 (2018) 070012
In : International Conference on Ion Sources, CERN Geneva, Geneva, Switzerland, 15 - 20 Oct 2017, pp.070012
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MEDeGUN commissioning results
/ Breitenfeldt, M (CERN) ; di Lorenzo, F (CERN) ; Pikin, A (Brookhaven Natl. Lab.) ; Pitters, J (CERN) ; Wenander, F (CERN)
MEDeGUN [1] is an electron gun to be used in an Electron Beam Ion Source (EBIS) designed to serve as C6+ source for LINAC-based 2nd generation hadron therapy facilities [2]. The latter require short pulses of at least 1*108 particles at a repetition rate of 400 Hz, which exceeds the possibilities of currently used electron cyclotron resonance ion sources (ECRIS) and EBISes. [...]
2018 - 3 p.
- Published in : AIP Conf. Proc. 2011 (2018) 040004
In : International Conference on Ion Sources, CERN Geneva, Geneva, Switzerland, 15 - 20 Oct 2017, pp.040004
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High Frequency RFQ Design and LEBT Matching for the CERN TwinEBIS Ion Source
/ Bencini, Vittorio (CERN) ; Breitenfeldt, Martin (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lombardi, Alessandra (CERN) ; Pahl, Hannes (CERN) ; Pikin, Alexander (CERN) ; Pitters, Johanna (CERN) ; Wenander, Fredrik (CERN)
An Electron Beam Ion Source (EBIS) is being developed at CERN for production of highly charged ions, for instance fully stripped $^{12}$C. The focus has so far been on the electron gun design, aiming for a high current compression, which results in a rapid ionisation process and thereby high repetition rate. [...]
CERN-ACC-2018-186.-
2018 - 4 p.
- Published in : 10.18429/JACoW-LINAC2018-TUPO016
Fulltext: PDF;
In : 29th International Linear Accelerator Conference, Beijing, China, 16 - 21 Sep 2018, pp.TUPO016
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Pepperpot emittance measurements of ion beams from an electron beam ion source
/ Pitters, J (CERN) ; Breitenfeldt, M (CERN) ; Duarte Pinto, S (PHOTONIS) ; Pahl, H (CERN ; U. Heidelberg (main)) ; Pikin, A (CERN ; Manchester U.) ; Shornikov, A (CERN ; High Voltage Engineering Europa B.V.,) ; Wenander, F (CERN)
A pepperpot emittance meter was used to measure the transverse emittance of multiply charged beams from REXEBIS, an Electron Beam Ion Source (EBIS) used for charge breeding of radioactive ion beams. The emittance meter is equipped with a Micro Channel Plate (MCP), a phosphor screen and a CCD camera for detection of the ion signal. [...]
2019 - 8 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 922 (2019) 28-35
Fulltext: PDF;
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Charge radii and electromagnetic moments of $^{195–211}$At
/ Cubiss, J G (York U., England) ; Barzakh, A E (St. Petersburg, INP) ; Seliverstov, M D (York U., England ; St. Petersburg, INP) ; Andreyev, A N (York U., England ; JAEA, Ibaraki ; Paisley U. ; CERN) ; Andel, B (Comenius U.) ; Antalic, S (Comenius U.) ; Ascher, P (Heidelberg, Max Planck Inst.) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Beck, D (Darmstadt, GSI) ; Bieroń, J (Jagiellonian U.) et al.
Hyperfine-structure parameters and isotope shifts of At195–211 have been measured for the first time at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy method. The hyperfine structures of isotopes were recorded using a triad of experimental techniques for monitoring the photo-ion current. [...]
2018 - 19 p.
- Published in : Phys. Rev. C 97 (2018) 054327
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A low energy ion beamline for TwinEBIS
/ Pahl, H (CERN ; Heidelberg U.) ; Bencini, V (CERN ; INFN, Rome ; Rome U.) ; Breitenfeldt, M (CERN ; ADAM, Geneva) ; Granadeiro Costa, A R (CERN ; IST, Lisbon (main)) ; Pikin, A (CERN ; Brookhaven Natl. Lab.) ; Pitters, J (CERN) ; Wenander, F (CERN)
A low energy beamline has been designed for the TwinEBIS setup. The beamline will be used to transport ions extracted from the electron beam ion source into an accelerating radio frequency quadrupole or into secondary devices, like a time of flight-mass spectrometer, attached to the beamline via a fast three way 20° ion switchyard. [...]
2018 - 21 p.
- Published in : JINST 13 (2018) P08012
Fulltext: pdf - PDF; 10.1088_1748-0221_13_08_P08012 - PDF;
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