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From Calcium to Cadmium: Testing the Pairing Functional through Charge Radii Measurements of $^{100−130}$Cd
/ Hammen, M (Mainz U., Inst. Kernchem.) ; Nörtershäuser, W (Mainz U., Inst. Kernchem. ; Darmstadt, Tech. Hochsch.) ; Balabanski, D L (Sofiya, Inst. Nucl. Res.) ; Bissell, M L (Leuven U. ; Manchester U.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Budinčević, I (Leuven U.) ; Cheal, B (Liverpool U.) ; Flanagan, K T (Manchester U.) ; Frömmgen, N (Mainz U., Inst. Kernchem.) ; Georgiev, G (CSNSM, Orsay) et al.
Differences in mean-square nuclear charge radii of $^{100–130} \rm{Cd}$ are extracted from high-resolution collinear laser spectroscopy of the $5s^2 S_{1/2} \to 5p^2 P_{3/2}$ transition of the ion and from the $5s5p^3P_2 \to 5s6s^3S_1$ transition in atomic Cd. The radii show a smooth parabolic behavior on top of a linear trend and a regular odd-even staggering across the almost complete $sdgh$ shell. [...]
2018 - 6 p.
- Published in : Phys. Rev. Lett. 121 (2018) 102501
Fulltext: PDF;
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Spins and electromagnetic moments of $^{101–109}$Cd
/ Yordanov, D T (Orsay, IPN ; Heidelberg, Max Planck Inst. ; CERN) ; Balabanski, D L (Bucharest, IFIN-HH) ; Bissell, M L (Manchester U. ; Leuven U.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Blazhev, A (Cologne U.) ; Budinčević, I (Leuven U.) ; Frömmgen, N (Mainz U., Inst. Kernchem.) ; Geppert, Ch (Darmstadt, Tech. U. ; Mainz U., Inst. Kernchem. ; Darmstadt, GSI) ; Grawe, H (Darmstadt, GSI) ; Hammen, M (Mainz U., Inst. Kernchem.) et al.
The neutron-deficient cadmium isotopes have been measured by high-resolution laser spectroscopy at CERN-ISOLDE. The electromagnetic moments of Cd101 have been determined for the first time and the quadrupole-moment precision of Cd103 has been vastly improved. [...]
2018 - 5 p.
- Published in : Phys. Rev. C 98 (2018) 011303
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Frequency-comb based collinear laser spectroscopy of Be for nuclear structure investigations and many-body QED tests
/ Krieger, A ; Nörtershäuser, W ; Geppert, Ch ; Blaum, K ; Bissell, M L ; Frömmgen, N ; Hammen, M ; Kreim, K ; Kowalska, M (CERN) ; Krämer, J et al.
Absolute transition frequencies of the $2s\,^2{\rm{S}}_{1/2}$ $\rightarrow$ $2p\,^2{\rm{P}}_{1/2,3/2}$ transitions in Be$^+$ were measured with a frequency comb in stable and short-lived isotopes at ISOLDE (CERN) using collinear laser spectroscopy. Quasi-simultaneous measurements in copropagating and counterpropagating geometry were performed to become independent from acceleration voltage determinations for Doppler-shift corrections of the fast ion beam. [...]
arXiv:1609.07655.-
2017 - 28 p.
- Published in : Appl. Phys. B 123 (2017) 15
External link: Preprint
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Simple Nuclear Structure in Cd111–129 from Atomic Isomer Shifts
/ Yordanov, D T (Orsay, IPN ; Heidelberg, Max Planck Inst. ; CERN) ; Balabanski, D L (Bucharest, IFIN-HH) ; Bissell, M L (Leuven U.) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Budinčević, I (Leuven U.) ; Cheal, B (Liverpool U.) ; Flanagan, K (Manchester U.) ; Frömmgen, N (Mainz U., Inst. Kernchem.) ; Georgiev, G (CSNSM, Orsay) ; Geppert, Ch (Mainz U., Inst. Kernchem. ; Darmstadt, GSI) et al.
Isomer shifts have been determined in Cd111–129 by high-resolution laser spectroscopy at CERN-ISOLDE. The corresponding mean square charge-radii changes, from the 1/2+ and the 3/2+ ground states to the 11/2- isomers, have been found to follow a distinct parabolic dependence as a function of the atomic mass number. [...]
2016 - 5 p.
- Published in : Phys. Rev. Lett. 116 (2016) 032501
APS Open Access article: PDF; Fulltext: PDF;
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Unexpectedly large charge radii of neutron-rich calcium isotopes
/ Garcia Ruiz, R. F. (Leuven U.) ; Bissell, M.L. (Leuven U. ; Manchester U.) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Ekström, A. (Oak Ridge ; Tennessee U.) ; Frömmgen, N. (Mainz U., Inst. Kernchem.) ; Hagen, G. (Oak Ridge) ; Hammen, M. (Mainz U., Inst. Kernchem.) ; Hebeler, K. (Darmstadt, Tech. Hochsch. ; Darmstadt, EMMI) ; Holt, J.D. (TRIUMF) ; Jansen, G.R. (Oak Ridge ; Tennessee U.) et al.
Despite being a complex many-body system, the atomic nucleus exhibits simple structures for certain ‘magic’ numbers of protons and neutrons. The calcium chain in particular is both unique and puzzling: evidence of doubly magic features are known in 40,48Ca, and recently suggested in two radioactive isotopes, 52,54Ca. [...]
arXiv:1602.07906.-
2016 - 6 p.
- Published in : Nature Phys. 12 (2016) 594-598
Fulltext: PDF; External link: Fulltext
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Precision test of many-body QED in the Be$^{+} 2p$ fine structure doublet using short-lived isotopes
/ IS449 collaboration
Absolute transition frequencies of the $2s\; ^2{\rm S}_{1/2} \rightarrow 2p\;^2\mathrm{P}_{1/2,3/2}$ transitions in Be$^+$ were measured for the isotopes $^{7,9-12}$Be. The fine structure splitting of the $2p$ state and its isotope dependence are extracted and compared to results of \textit{ab initio} calculations using explicitly correlated basis functions, including relativistic and quantum electrodynamics effects at the order of $m \alpha^6$ and $m \alpha^7 \ln \alpha$. [...]
arXiv:1507.03830; CERN-ISOLDE-2015-006; CERN-ISOLDE-2015-006.-
2015-07-13 - 5 p.
- Published in : Phys. Rev. Lett. 115 (2015) 033002
APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
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Collinear laser spectroscopy of atomic cadmium
/ Frömmgen, Nadja (Mainz U., Inst. Kernchem.) ; Balabanski, Dimiter L. (Bucharest, IFIN-HH) ; Bissell, Mark L. (Leuven U.) ; Bieroń, Jacek (Jagiellonian U.) ; Blaum, Klaus (Heidelberg, Max Planck Inst.) ; Cheal, Bradley (Liverpool U.) ; Flanagan, Kieran (Manchester U.) ; Fritzsche, Stephan (Helmholtz Inst., Jena ; Jena U.) ; Geppert, Christopher (Mainz U., Inst. Kernchem. ; Darmstadt, Tech. U.) ; Hammen, Michael (Mainz U., Inst. Kernchem.) et al.
Hyperfine structure $A$ and $B$ factors of the atomic $5s\,5p\,\; ^3\rm{P}_2 \rightarrow 5s\,6s\,\; ^3\rm{S}_1$ transition are determined from collinear laser spectroscopy data of $^{107-123}$Cd and $^{111m-123m}$Cd. Nuclear magnetic moments and electric quadrupole moments are extracted using reference dipole moments and calculated electric field gradients, respectively. [...]
arXiv:1507.03846.-
2015 - 12 p.
- Published in : Eur. Phys. J. D 69 (2015) 164
Fulltext: PDF; External link: Preprint
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Ground-State Electromagnetic Moments of Calcium Isotopes
/ Garcia Ruiz, R.F. (Leuven U.) ; Bissell, M.L. (Leuven U.) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Frommgen, N. (Mainz U., Inst. Phys.) ; Hammen, M. (Mainz U., Inst. Phys.) ; Holt, J.D. (Darmstadt, Tech. Hochsch. ; Darmstadt, EMMI ; TRIUMF) ; Kowalska, M. (CERN) ; Kreim, K. (Heidelberg, Max Planck Inst.) ; Menendez, J. (Darmstadt, Tech. Hochsch. ; Darmstadt, EMMI ; Tokyo U.) ; Neugart, R. (Heidelberg, Max Planck Inst. ; Mainz U., Inst. Phys.) et al.
High-resolution bunched-beam collinear laser spectroscopy was used to measure the optical hyperfine spectra of the $^{43-51}$Ca isotopes. The ground state magnetic moments of $^{49,51}$Ca and quadrupole moments of $^{47,49,51}$Ca were measured for the first time, and the $^{51}$Ca ground state spin $I=3/2$ was determined in a model-independent way. [...]
arXiv:1504.04474.-
2015-04-30 - 6 p.
- Published in : Phys. Rev. C 91 (2015) 041304
Preprint: PDF; External link: Preprint
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Spins, moments and radii of Cd isotopes
/ Hammen, Michael
The complex nature of the nucleon-nucleon interaction and the wide range of systems covered by the roughly 3000 known nuclides leads to a multitude of effects observed in nuclear structure [...]
CERN-THESIS-2013-354
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66 p.
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