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NSR database version of April 24, 2024.

Search: Author = J.R.Lopez-Urrutia

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2022KI21      Nature(London) 611, 43 (2022)

S.A.King, L.J.Spiess, P.Micke, A.Wilzewski, T.Leopold, E.Benkler, R.Lange, N.Huntemann, A.Surzhykov, V.A.Yerokhin, J.R.C.Lopez-Urrutia, P.O.Schmidt

An optical atomic clock based on a highly charged ion

ATOMIC PHYSICS ^36,40Ar; measured frequencies; deduced isotope shifts, evaluation of an optical atomic clock. Comparison with available data.

doi: 10.1038/s41586-022-05245-4
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2020BI05      Phys.Rev.Lett. 124, 192502 (2020)

P.V.Bilous, H.Bekker, J.C.Berengut, B.Seiferle, L.V.D.Wense, P.G.Thirolf, T.Pfeifer, J.R.C.Lopez-Urrutia, A.Palffy

Electronic Bridge Excitation in Highly Charged ²²⁹Th Ions

NUCLEAR REACTIONS Th(γ, X)^229mTh, E<10 eV; calculated low-lying electronic energy levels in Th, nuclear EB excitation rate in the EBIT, Zeeman splitting and Doppler broadening of the absorbed photon energy.

doi: 10.1103/physrevlett.124.192502
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2017TR07      Nucl.Instrum.Methods Phys.Res. B408, 107 (2017)

E.Trabert, P.Beiersdorfer, J.R.C.Lopez-Urrutia

Atomic lifetime measurements of Ne-like Fe ions in a magnetic field

ATOMIC PHYSICS Fe; measured level decay products; deduced field-free M1 transition rate for Z=26, lifetime.

doi: 10.1016/j.nimb.2017.04.040
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2016WI04      Phys.Rev. A 94, 012506 (2016)

A.Windberger, F.Torretti, A.Borschevsky, A.Ryabtsev, S.Dobrodey, H.Bekker, E.Eliav, U.Kaldor, W.Ubachs, R.Hoekstra, J.R.C.Lopez-Urrutia, O.O.Versolato

Analysis of the fine structure of Sn¹¹⁺-Sn¹⁴⁺ ions by optical spectroscopy in an electron-beam ion trap

ATOMIC PHYSICS Sn; measured fluorescent cascades from electronically excited ions by electron impact; deduced fine structure. Comparison with ab initio calculations based on Fock space coupled cluster theory and COWAN calculations.

doi: 10.1103/PhysRevA.94.012506
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2015MA30      Phys.Rev. C 91, 045504 (2015)

S.Malbrunot-Ettenauer, T.Brunner, U.Chowdhury, A.T.Gallant, V.V.Simon, M.Brodeur, A.Chaudhuri, E.Mane, M.C.Simon, C.Andreoiu, G.Audi, J.R.C.Lopez-Urrutia, P.Delheij, G.Gwinner, A.Lapierre, D.Lunney, M.R.Pearson, R.Ringle, J.Ullrich, J.Dilling

Penning trap mass measurements utilizing highly charged ions as a path to benchmark isospin-symmetry breaking corrections in ⁷⁴Rb

ATOMIC MASSES ⁷⁴Ga, ^{74,75,76,85,87}Rb; measured cyclotron frequency ratios of Rb isotopes in q=8-12 charge states relative to that of ⁸⁵Rb using TITAN at TRIUMF-ISAC facility; deduced mass excesses and compared to previous experimental data.

RADIOACTIVITY ⁷⁴Rb(EC); deduced Q value and logft using mass excess from current and previous studies. Systematics of superallowed β decays of ⁴²Sc, ⁴⁶V, ⁵⁰Mn, ⁵⁴Co, ⁶²Ga, ⁷⁴Rb. Discussed test of the isospin-symmetry correction term δ_C.

NUCLEAR REACTIONS Nb(p, X)⁷⁴Rb/⁷⁵Rb/⁷⁶Rb/⁷⁸Rb/⁷⁴Ga, E=500 MeV; measured yields, TOF ion-cyclotron resonances for highly-charged Rb isotopes, TOF of ions with reference to highly-charged ⁸⁵Rb isotope using TITAN at TRIUMF-ISAC facility.

doi: 10.1103/PhysRevC.91.045504
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2014LE20      Phys.Rev.Lett. 113, 082502 (2014)

A.Lennarz, A.Grossheim, K.G.Leach, M.Alanssari, T.Brunner, A.Chaudhuri, U.Chowdhury, J.R.C.Lopez-Urrutia, A.T.Gallant, M.Holl, A.A.Kwiatkowski, J.Lassen, T.D.Macdonald, B.E.Schultz, S.Seeraji, M.C.Simon, C.Andreoiu, J.Dilling, D.Frekers

In-Trap Spectroscopy of Charge-Bred Radioactive Ions

RADIOACTIVITY ¹²⁴In(β^-), ¹²⁴Cs(EC); measured decay products, Eγ, Iγ, X-rays; deduced isomer yields, T_1/2, γ-ray energies, branching ratios. Electron-beam ion trap of the TITAN facility at TRIUMF.

doi: 10.1103/PhysRevLett.113.082502
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2013FR13      Phys.Lett. B 722, 233 (2013)

D.Frekers, M.C.Simon, C.Andreoiu, J.C.Bale, M.Brodeur, T.Brunner, A.Chaudhuri, U.Chowdhury, J.R.C.Lopez-Urrutia, P.Delheij, H.Ejiri, S.Ettenauer, A.T.Gallant, V.Gavrin, A.Grossheim, M.N.Harakeh, F.Jang, A.A.Kwiatkowski, J.Lassen, A.Lennarz, M.Luichtl, T.Ma, T.D.Macdonald, E.Mane, D.Robertson, B.E.Schultz, V.V.Simon, A.Teigelhofer, J.Dilling

Penning-trap Q-value determination of the ⁷¹Ga(ν, e^-)⁷¹Ge reaction using threshold charge breeding of on-line produced isotopes

ATOMIC MASSES ⁷¹Ga, ⁷¹Ge; measured TOF, TOF-ICR, ion cyclotron resonance spectra; deduced Q-value and its uncertainty. TITAN Penning trap at ISAC/TRIUMF, comparison with AME data.

doi: 10.1016/j.physletb.2013.04.019
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2011ET01      Phys.Rev.Lett. 107, 272501 (2011)

S.Ettenauer, M.C.Simon, A.T.Gallant, T.Brunner, U.Chowdhury, V.V.Simon, M.Brodeur, A.Chaudhuri, E.Mane, C.Andreoiu, G.Audi, J.R.C.Lopez-Urrutia, P.Delheij, G.Gwinner, A.Lapierre, D.Lunney, M.R.Pearson, R.Ringle, J.Ullrich, J.Dilling

First Use of High Charge States for Mass Measurements of Short-Lived Nuclides in a Penning Trap

ATOMIC MASSES ^74,75,76Rb, ⁷⁴Ga; measured TOF ion-cyclotron resonances; deduced masses. Penning trap measurements, comparison with mass evaluation.

doi: 10.1103/PhysRevLett.107.272501
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2006DI22      Int.J. Mass Spectrom. 251, 198 (2006)

J.Dilling, R.Baartman, P.Bricault, M.Brodeur, L.Blomeley, F.Buchinger, J.Crawford, J.R.C.Lopez-Urrutia, P.Delheij, M.Froese, G.P.Gwinner, Z.Ke, J.K.P.Lee, R.B.Moore, V.Ryjkov, G.Sikler, M.Smith, J.Ullrich, J.Vaz, and the TITAN collaboration

Mass measurements on highly charged radioactive ions, a new approach to high precision with TITAN

doi: 10.1016/j.ijms.2006.01.044
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2005SI35      Eur.Phys.J. A 25, Supplement 1, 63 (2005)

G.Sikler, J.R.C.Lopez-Urrutia, J.Dilling, S.Epp, C.J.Osborne, J.Ullrich

A high-current EBIT for charge-breeding of radionuclides for the TITAN spectrometer

doi: 10.1140/epjad/i2005-06-072-6
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2003BE28      Nucl.Instrum.Methods Phys.Res. B205, 62 (2003)

P.Beiersdorfer, J.R.C.Lopez-Urrutia, S.B.Utter, E.Trabert, M.G.H.Gustavsson, C.Forssen, A.-M.Martensson-Pendrill

Hyperfine structure of heavy hydrogen-like ions

NUCLEAR MOMENTS ^203,205Tl; measured hfs of hydrogen-like ions; deduced radii, μ. ¹⁶⁵Ho, ^185,187Re, ^203,205Tl, ²⁰⁷Pb, ²⁰⁹Bi; calculated hfs of hydrogen-like ions.

doi: 10.1016/S0168-583X(03)00534-2
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2001BE46      Phys.Rev. A64, 032506 (2001)

P.Beiersdorfer, S.B.Utter, K.L.Wong, J.R.C.Lopez-Urrutia, J.A.Britten, H.Chen, C.L.Harris, R.S.Thoe, D.B.Thorn, E.Trabert, M.G.H.Gustavsson, C.Forssen, A.-M.Martensson-Pendrill

Hyperfine Structure of Hydrogenlike Thallium Isotopes

NUCLEAR MOMENTS ^203,205Tl; measured hfs in hydrogen-like ions; deduced μ, radii.

doi: 10.1103/PhysRevA.64.032506
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1999UT01      Phys.Rev.Lett. 82, 505 (1999)

S.B.Utter, P.Beiersdorfer, A.Barnes, R.W.Lougheed, J.R.C.Lopez-Urrutia, J.A.Becker, M.S.Weiss

Reexamination of the Optical Gamma Ray Decay in ²²⁹Th

RADIOACTIVITY ²³³U(α); measured photon spectra; deduced alpha flourescence in air. ²²⁹Th deduced no observation of decay from first excited level.

doi: 10.1103/PhysRevLett.82.505
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1998LO04      Phys.Rev. A57, 879 (1998)

J.R.C.Lopez-Urrutia, P.Beiersdorfer, K.Widmann, B.B.Birkett, A.-M.Martensson-Pendrill, M.G.H.Gustavsson

Nuclear Magnetization Distribution Radii Determined by Hyperfine Transitions in the 1s Level of H-Like Ions ¹⁸⁵Re⁷⁴⁺ and ¹⁸⁷Re⁷⁴⁺⁺

NUCLEAR MOMENTS ^185,187Re; measured hfs; deduced magnetization distribution radii.

doi: 10.1103/PhysRevA.57.879
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