1.
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A compact linear Paul trap cooler buncher for CRIS
/ Ricketts, C M (Manchester U.) ; Cooper, B S (Manchester U.) ; Edwards, G (Manchester U.) ; Perrett, H A (Manchester U.) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Cocolios, T E (Leuven U.) ; Flanagan, K T (Manchester U.) ; Garcia Ruiz, R F (CERN) ; de Groote, R P (Jyvaskyla U.) et al.
A gas-filled linear Paul trap for the Collinear Resonance Ionisation Spectroscopy (CRIS) experiment at ISOLDE, CERN is currently under development. The trap is designed to accept beam from both ISOLDE target stations and the CRIS stable ion source. [...]
2020 - 3 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 463 (2020) 375-377
In : 18th International Conference on Electromagnetic Isotope Separators and Related Topics, Geneva, Switzerland, 16 - 21 Sep 2018, pp.375-377
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2.
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Optimising the Collinear Resonance Ionisation Spectroscopy (CRIS) experiment at CERN-ISOLDE
/ Vernon, A R (Manchester U.) ; de Groote, R P (Jyvaskyla U. ; Leuven U.) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Cocolios, T E (Leuven U.) ; Farooq-Smith, G J (Leuven U.) ; Flanagan, K T (Manchester U.) ; Garcia Ruiz, R F (Manchester U. ; CERN) ; Gins, W (Leuven U.) ; Koszorús, Á (Leuven U.) et al.
The CRIS experiment at CERN-ISOLDE is a dedicated laser spectroscopy setup for high-resolution hyperfine structure measurements of nuclear observables of exotic isotopes. Between 2015 and 2018 developments have been made to improve the background suppression, laser-atom overlap and automation of the beamline. [...]
2020 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 463 (2020) 384-389
In : 18th International Conference on Electromagnetic Isotope Separators and Related Topics, Geneva, Switzerland, 16 - 21 Sep 2018, pp.384-389
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3.
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Resonance ionization schemes for high resolution and high efficiency studies of exotic nuclei at the CRIS experiment
/ Koszorús, Á (Leuven U.) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Bissell, M L (Manchester U.) ; Cocolios, T E (Leuven U.) ; Cooper, B S (Manchester U.) ; de Groote, R P (Leuven U. ; Jyvaskyla U.) ; Farooq-Smith, G J (Leuven U.) ; Fedosseev, V N (CERN) ; Flanagan, K T (Manchester U.) et al.
This paper presents an overview of recent resonance ionization schemes used at the Collinear Resonance Ionization Spectroscopy (CRIS) setup located at ISOLDE, CERN. The developments needed to reach high spectral resolution and efficiency will be discussed. [...]
2020 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 463 (2020) 398-402
In : 18th International Conference on Electromagnetic Isotope Separators and Related Topics, Geneva, Switzerland, 16 - 21 Sep 2018, pp.398-402
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4.
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Laser spectroscopy of indium Rydberg atom bunches by electric field ionization
/ Vernon, A R (Leuven U.) ; Ricketts, C M (Manchester U.) ; Billowes, J (Manchester U.) ; Cocolios, T E (Leuven U.) ; Cooper, B S (Manchester U. ; U. Manchester (main)) ; Flanagan, K T (Manchester U. ; U. Manchester (main)) ; Ruiz, R F Garcia (CERN ; MIT) ; P Gustafsson, F (Leuven U.) ; Neyens, G (Leuven U. ; CERN) ; Perrett, H A (Manchester U.) et al.
This work reports on the application of a novel electric field-ionization setup for high-resolution laser spectroscopy measurements on bunched fast atomic beams in a collinear geometry. In combination with multi-step resonant excitation to Rydberg states using pulsed lasers, the field ionization technique demonstrates increased sensitivity for isotope separation and measurement of atomic parameters over previous non-resonant laser ionization methods. [...]
2020 - 18 p.
- Published in : Sci. Rep. 10 (2020) 12306
Fulltext: PDF;
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5.
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Tin resonance-ionization schemes for atomic- and nuclear-structure studies
/ Gustafsson, F P (Leuven U.) ; Ricketts, C M (Manchester U.) ; Reitsma, M L (U. Groningen, VSI) ; Garcia Ruiz, R F (CERN ; MIT) ; Bai, S W (Peking U., SKLNPT) ; Berengut, J C (Heidelberg, Max Planck Inst. ; New South Wales U.) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Borschevsky, A (U. Groningen, VSI) ; Cocolios, T E (Leuven U.) et al.
This paper presents high-precision spectroscopic measurements of atomic tin using five different resonanceionization schemes performed with the collinear resonance-ionization spectroscopy technique. Isotope shifts were measured for the stable tin isotopes from the $5s^2 5p^2$ $^3P_{0,1,2}$ and $^1S_0$ to the $5s^2 5p6s ^1P_1, ^3P_{1,2}$ and $5s^2 5p7s^1 P_1$ atomic levels. [...]
2020 - 13 p.
- Published in : Phys. Rev. A 102 (2020) 052812
Fulltext: PDF;
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6.
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Nuclear charge radii of $^{62−80}$Zn and their dependence on cross-shell proton excitations
/ Xie, L (Manchester U.) ; Yang, X F (Peking U., SKLNPT ; Leuven U.) ; Wraith, C (Liverpool U.) ; Babcock, C (Liverpool U.) ; Bieroń, J (Jagiellonian U.) ; Billowes, J (Manchester U.) ; Bissell, M L (Manchester U. ; Leuven U.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Cheal, B (Liverpool U.) ; Filippin, L (U. Brussels (main)) et al.
Nuclear charge radii of $^{62−80}$Zn have been determined using collinear laser spectroscopy of bunched ion beams at CERN-ISOLDE. The subtle variations of observed charge radii, both within one isotope and along the full range of neutron numbers, are found to be well described in terms of the proton excitations across the $Z=28$ shell gap, as predicted by large-scale shell model calculations. [...]
2019 - 5 p.
- Published in : Phys. Lett. B 797 (2019) 134805
Article from SCOAP3: PDF;
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7.
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High-Precision Multiphoton Ionization of Accelerated Laser-Ablated Species
/ Garcia Ruiz, R F (Manchester U. ; CERN) ; Vernon, A R (Manchester U.) ; Binnersley, C L (Manchester U.) ; Sahoo, B K (Ahmedabad, Phys. Res. Lab ; Wuhan, MRAMP) ; Bissell, M (Manchester U.) ; Billowes, J (Manchester U.) ; Cocolios, T E (Leuven U.) ; Gins, W (Leuven U.) ; de Groote, R P (Leuven U.) ; Flanagan, K T (U. Manchester (main)) et al.
We demonstrate that the pulsed-time structure and high-peak ion intensity provided by the laser-ablation process can be directly combined with the high resolution, high efficiency, and low background offered by collinear resonance ionization spectroscopy. This simple, versatile, and powerful method offers new and unique opportunities for high-precision studies of atomic and molecular structures, impacting fundamental and applied physics research. [...]
2018 - 18 p.
- Published in : Phys. Rev. X 8 (2018) 041005
Fulltext: PDF;
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8.
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Precision measurements of the charge radii of potassium isotopes
/ Koszorús, Á (KU Leuven, Dept. Phys. Astron.) ; Yang, X F (KU Leuven, Dept. Phys. Astron. ; Peking U., SKLNPT) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Bissell, M L (Manchester U.) ; Cocolios, T E (KU Leuven, Dept. Phys. Astron.) ; Farooq-Smith, G J (KU Leuven, Dept. Phys. Astron.) ; de Groote, R P (KU Leuven, Dept. Phys. Astron. ; Jyvaskyla U.) ; Flanagan, K T (Manchester U.) ; Franchoo, S (Orsay, IPN) et al.
Precision nuclear charge radii measurements in the light-mass region are essential for understanding the evolution of nuclear structure, but their measurement represents a great challenge for experimental techniques. At the Collinear Resonance Ionization Spectroscopy (CRIS) setup at ISOLDE-CERN, a laser frequency calibration and monitoring system was installed and commissioned through the hyperfine spectra measurement of $^{38–47}$K. [...]
2019 - 11 p.
- Published in : Phys. Rev. C 100 (2019) 034304
Article from SCOAP3: PDF;
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9.
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Analytic Response Relativistic Coupled-Cluster Theory: The first application to indium isotope shifts
/ Sahoo, B.K. (Ahmedabad, Phys. Res. Lab) ; Vernon, A.R. (Manchester U. ; Leuven U.) ; Garcia Ruiz, R.F. (CERN ; MIT) ; Binnersley, C.L. (Manchester U.) ; Billowes, J. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Cocolios, T.E. (Leuven U.) ; Farooq-Smith, G.J. (Leuven U.) ; Flanagan, K.T. (Manchester U. ; U. Manchester (main)) ; Gins, W. (Leuven U.) et al.
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 theory framework to determine the atomic field shift and mass shift 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. [...]
arXiv:1911.02812.-
2020-01-14 - 13 p.
- Published in : New J. Phys. 22 (2020) 012001
Fulltext: fulltext1763769 - PDF; 1911.02812 - PDF;
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10.
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Isotope Shifts of Radium Monofluoride Molecules
/ Udrescu, S.M. (MIT) ; Brinson, A.J. (MIT) ; Ruiz, R.F. Garcia (MIT ; CERN) ; Gaul, K. (Philipps U. Marburg) ; Berger, R. (Philipps U. Marburg) ; Billowes, J. (Manchester U.) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Breier, A.A. (Kassel U.) ; Chrysalidis, K. (CERN) et al.
Isotope shifts of $^{223-226,228}$Ra$^{19}$F were measured for different vibrational levels in the electronic transition $A^{2}{}{\Pi}_{1/2}\leftarrow X^{2}{}{\Sigma}^{+}$. The observed isotope shifts demonstrate the particularly high sensitivity of radium monofluoride to nuclear size effects, offering a stringent test of models describing the electronic density within the radium nucleus. [...]
arXiv:2105.10549.-
2021-07-14 - 7 p.
- Published in : Phys. Rev. Lett. 127 (2021) 033001
Fulltext: 2105.10549 - PDF; PhysRevLett.127.033001 - PDF; Fulltext from publisher: PDF;
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