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Proton-neutron pairing correlations in the self-conjugate nucleus $^{42}$Sc / Koszorus, Agota (Liverpool U.) ; Vormawah, Liam (Liverpool U.) ; Beerwerth, Randolf (Helmholtz Inst., Jena) ; Bissell, Mark (Manchester U.) ; Campbell, Paul (Manchester U.) ; Cheal, Bradley (Liverpool U.) ; Devlin, Charlie (Liverpool U.) ; Eronen, Tommi (Jyvaskyla U.) ; Fritzsche, Stephan (Helmholtz Inst., Jena) ; Geldhof, Sarina (Jyvaskyla U. ; Leuven U.) et al.
Collinear laser spectroscopy of the $N=Z=21$ self-conjugate nucleus $^{42}$Sc has been performed at the JYFL IGISOL IV facility in order to determine the change in nuclear mean-square charge radius between the $I^{\pi}=0^{+}$ ground state and the $I^{\pi}=7^{+}$ isomer via the measurement of the $^{42\mathrm{g},42\mathrm{m}}$Sc isomer shift. New multi-configurational Dirac-Fock calculations for the atomic mass shift and field shift factors have enabled a recalibration of the charge radii of the $^{42-46}$Sc isotopes which were measured previously. [...]
arXiv:2102.01988.- 2021-08-10 - 6 p. - Published in : Phys. Lett. B 819 (2021) 136439 Article from SCOAP3: PDF;

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First Ionization Potentials of Fm, Md, No, and Lr: Verification of Filling-Up of 5f Electrons and Confirmation of the Actinide Series / Sato, Tetsuya K (JAEA, Ibaraki) ; Asai, Masato (JAEA, Ibaraki) ; Borschevsky, Anastasia (Groningen U.) ; Beerwerth, Randolf (Jena U., TPI) ; Kaneya, Yusuke (JAEA, Ibaraki) ; Makii, Hiroyuki (JAEA, Ibaraki) ; Mitsukai, Akina (JAEA, Ibaraki) ; Nagame, Yuichiro (JAEA, Ibaraki) ; Osa, Akihiko (JAEA, Ibaraki) ; Toyoshima, Atsushi (JAEA, Ibaraki) et al.
We report the first ionization potentials (IP1) of the heavy actinides, fermium (Fm, atomic number Z = 100), mendelevium (Md, Z = 101), nobelium (No, Z = 102), and lawrencium (Lr, Z = 103), determined using a method based on a surface ionization process coupled to an online mass separation technique in an atom-at-a-time regime. The measured IP1 values agree well with those predicted by state-of-the-art relativistic calculations performed alongside the present measurements. [...]
2018 - 5 p. - Published in : J. Am. Chem. Soc. 140 (2018) 14609-14613 Fulltext: PDF;

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In-gas laser ionization and spectroscopy of actinium isotopes near the $N=126$ closed shell / Granados, C (Leuven U.) ; Creemers, P (Leuven U.) ; Ferrer, R (Leuven U.) ; Gaffney, L P (Leuven U.) ; Gins, W (Leuven U.) ; de Groote, R (Leuven U.) ; Huyse, M (Leuven U.) ; Kudryavtsev, Yu (Leuven U.) ; Martinez, Y (Leuven U.) ; Raeder, S (Leuven U.) et al.
The in-gas laser ionization and spectroscopy (IGLIS) technique was applied on the Ac212–215 isotopes, produced at the Leuven Isotope Separator On-Line (LISOL) facility by using the in-gas-cell and the in-gas-jet methods. The first application under on-line conditions of the in-gas-jet laser spectroscopy method showed a superior performance in terms of selectivity, spectral resolution, and efficiency in comparison with the in-gas-cell method. [...]
2017 - 13 p. - Published in : Phys. Rev. C 96 (2017) 054331 Fulltext: PDF;

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Towards high-resolution laser ionization spectroscopy of the heaviest elements in supersonic gas jet expansion / Ferrer, R (KU Leuven, Dept. Phys. Astron.) ; Barzakh, A (St. Petersburg, INP) ; Bastin, B (GANIL) ; Beerwerth, R (Helmholtz Inst., Jena ; Jena U., TPI) ; Block, M (Darmstadt, GSI ; Helmholtz Inst., Mainz ; Mainz U., Inst. Kernchem.) ; Creemers, P (KU Leuven, Dept. Phys. Astron.) ; Grawe, H (Darmstadt, GSI) ; de Groote, R (KU Leuven, Dept. Phys. Astron.) ; Delahaye, P (GANIL) ; Fléchard, X (Caen U.) et al.
Resonant laser ionization and spectroscopy are widely used techniques at radioactive ion beam facilities to produce pure beams of exotic nuclei and measure the shape, size, spin and electromagnetic multipole moments of these nuclei. However, in such measurements it is difficult to combine a high efficiency with a high spectral resolution. [...]
2017 - 9 p. - Published in : Nature Commun. 8 (2017) 14520

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Changes in nuclear structure along the Mn isotopic chain studied via charge radii / Heylen, H. (Leuven U.) ; Babcock, C. (CERN ; Liverpool U.) ; Beerwerth, R. (Helmholtz Inst., Jena ; Jena U., TPI) ; Billowes, J. (Manchester U.) ; Bissell, M.L. (Leuven U. ; Manchester U.) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Bonnard, J. (INFN, Padua) ; Campbell, P. (Manchester U.) ; Cheal, B. (Liverpool U.) ; Day Goodacre, T. (Manchester U.) et al.
The hyperfine spectra of $^{51,53-64}$Mn were measured in two experimental runs using collinear laser spectroscopy at ISOLDE, CERN. Laser spectroscopy was performed on the atomic $3d^5\ 4s^2\ ^{6}\text{S}_{5/2}\rightarrow 3d^5\ 4s4p\ ^{6}\text{P}_{3/2}$ and ionic $3d^5\ 4s\ ^{5}\text{S}_2 \rightarrow 3d^5\ 4p\ ^{5}\text{P}_3$ transitions, yielding two sets of isotope shifts. [...]
arXiv:1609.05021.- 2016-11-28 - 11 p. - Published in : Phys. Rev. C 94 (2016) 054321 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint

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Se også: lignende forfatternavn
1	Beerwerth, R.
4	Beerwerth, Randolf

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