135 results on '"Garcia Ruiz, R. F."'
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2. Precision spectroscopy and laser-cooling scheme of a radium-containing molecule
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Udrescu, S. M., Wilkins, S. G., Breier, A. A., Athanasakis-Kaklamanakis, M., Garcia Ruiz, R. F., Au, M., Belošević, I., Berger, R., Bissell, M. L., Binnersley, C. L., Brinson, A. J., Chrysalidis, K., Cocolios, T. E., de Groote, R. P., Dorne, A., Flanagan, K. T., Franchoo, S., Gaul, K., Geldhof, S., Giesen, T. F., Hanstorp, D., Heinke, R., Koszorús, Á., Kujanpää, S., Lalanne, L., Neyens, G., Nichols, M., Perrett, H. A., Reilly, J. R., Rothe, S., van den Borne, B., Vernon, A. R., Wang, Q., Wessolek, J., Yang, X. F., and Zülch, C.
- Published
- 2024
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3. Nuclear moments of indium isotopes reveal abrupt change at magic number 82
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Vernon, A. R., Garcia Ruiz, R. F., Miyagi, T., Binnersley, C. L., Billowes, J., Bissell, M. L., Bonnard, J., Cocolios, T. E., Dobaczewski, J., Farooq-Smith, G. J., Flanagan, K. T., Georgiev, G., Gins, W., de Groote, R. P., Heinke, R., Holt, J. D., Hustings, J., Koszorús, Á., Leimbach, D., Lynch, K. M., Neyens, G., Stroberg, S. R., Wilkins, S. G., Yang, X. F., and Yordanov, D. T.
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- 2022
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4. Precision spectroscopy of fast, hot, exotic isotopes using machine-learning-assisted event-by-event Doppler correction
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Udrescu, S. M., Torres, D. A., Garcia Ruiz, R. F., Udrescu, S. M., Torres, D. A., and Garcia Ruiz, R. F.
- Abstract
We propose an experimental scheme for performing sensitive, high-precision laser spectroscopy studies on fast exotic isotopes. By inducing a stepwise resonant ionization of the atoms traveling inside an electric field and subsequently detecting the ion and the corresponding electron, time-, and position-sensitive measurements of the resulting particles can be performed. Using a mixture density network, we can leverage this information to predict the initial energy of individual atoms and thus apply a Doppler correction of the observed transition frequencies on an event-by-event basis. We conduct numerical simulations of the proposed experimental scheme and show that kHz-level uncertainties can be achieved for ion beams produced at extreme temperatures (>10 8 K), with energy spreads as large as 10 keV and nonuniform velocity distributions. The ability to perform in-flight spectroscopy, directly on highly energetic beams, offers unique opportunities to study short-lived isotopes with lifetimes in the millisecond range and below, produced in low quantities, in hot and highly contaminated environments, without the need for cooling techniques. Such species are of marked interest for nuclear structure, astrophysics, and new physics searches.
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- 2024
5. Precision spectroscopy and laser-cooling scheme of a radium-containing molecule
- Author
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Massachusetts Institute of Technology. Department of Physics, Udrescu, S. M., Wilkins, S. G., Breier, A. A., Athanasakis-Kaklamanakis, M., Garcia Ruiz, R. F., Au, M., Belošević, I., Berger, R., Bissell, M. L., Binnersley, C. L., Brinson, A. J., Chrysalidis, K., Cocolios, T. E., de Groote, R. P., Dorne, A., Flanagan, K. T., Franchoo, S., Gaul, K., Geldhof, S., Giesen, T. F., Hanstorp, D., Heinke, R., Koszorús, Á., Kujanpää, S., Lalanne, L., Neyens, G., Nichols, M., Perrett, H. A., Reilly, J. R., Rothe, S., van den Borne, B., Vernon, A. R., Wang, Q., Wessolek, J., Yang, X. F., Zülch, C., Massachusetts Institute of Technology. Department of Physics, Udrescu, S. M., Wilkins, S. G., Breier, A. A., Athanasakis-Kaklamanakis, M., Garcia Ruiz, R. F., Au, M., Belošević, I., Berger, R., Bissell, M. L., Binnersley, C. L., Brinson, A. J., Chrysalidis, K., Cocolios, T. E., de Groote, R. P., Dorne, A., Flanagan, K. T., Franchoo, S., Gaul, K., Geldhof, S., Giesen, T. F., Hanstorp, D., Heinke, R., Koszorús, Á., Kujanpää, S., Lalanne, L., Neyens, G., Nichols, M., Perrett, H. A., Reilly, J. R., Rothe, S., van den Borne, B., Vernon, A. R., Wang, Q., Wessolek, J., Yang, X. F., and Zülch, C.
- Abstract
Molecules containing heavy radioactive nuclei are predicted to be extremely sensitive to violations of the fundamental symmetries of nature. The nuclear octupole deformation of certain radium isotopes massively boosts the sensitivity of radium monofluoride molecules to symmetry-violating nuclear properties. Moreover, these molecules are predicted to be laser coolable. Here we report measurements of the rovibronic structure of radium monofluoride molecules, which allow the determination of their laser cooling scheme. We demonstrate an improvement in resolution of more than two orders of magnitude compared to the state of the art. Our developments allowed measurements of minuscule amounts of hot molecules, with only a few hundred per second produced in a particular rotational state. The combined precision and sensitivity achieved in this work offer opportunities for studies of radioactive molecules of interest in fundamental physics, chemistry and astrophysics.
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- 2024
6. Recent direct reaction experimental studies with radioactive tin beams
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Jones, K. L., Ahn, S., Allmond, J. M., Ayres, A., Bardayan, D. W., Baugher, T., Bazin, D., Berryman, J. S., Bey, A., Bingham, C., Cartegni, L., Cerizza, G., Chae, K. Y., Cizewski, J. A., Gade, A., Galindo-Uribarri, A., Garcia-Ruiz, R. F., Grzywacz, R., Howard, M. E., Kozub, R. L., Liang, J. F., Manning, B., Matos, M., McDaniel, S., Miller, D., Nesaraja, C. D., O'Malley, P. D., Padgett, S., Padilla-Rodal, E., Pain, S. D., Pittman, S. T., Radford, D. C., Ratkiewicz, A., Schmitt, K. T., Shore, A., Smith, M. S., Stracener, D. W., Stroberg, S. R., Tostevin, J., Varner, R. L., Weisshaar, D., Wimmer, K., and Winkler, R.
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Nuclear Experiment - Abstract
Direct reaction techniques are powerful tools to study the single-particle nature of nuclei. Performing direct reactions on short-lived nuclei requires radioactive ion beams produced either via fragmentation or the Isotope Separation OnLine (ISOL) method. Some of the most interesting regions to study with direct reactions are close to the magic numbers where changes in shell structure can be tracked. These changes can impact the final abundances of explosive nucleosynthesis. The structure of the chain of tin isotopes is strongly influenced by the Z=50 proton shell closure, as well as the neutron shell closures lying in the neutron-rich, N=82, and neutron-deficient, N=50, regions. Here we present two examples of direct reactions on exotic tin isotopes. The first uses a one-neutron transfer reaction and a low-energy reaccelerated ISOL beam to study states in 131Sn from across the N=82 shell closure. The second example utilizes a one-neutron knockout reaction on fragmentation beams of neutron-deficient 106,108Sn. In both cases, measurements of gamma rays in coincidence with charged particles proved to be invaluable., Comment: 11 pages, 5 figures, Zakopane Conference on Nuclear Physics "Extremes of the Nuclear Landscape", Zakopane, Poland, August 31 - September 7, 2014
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- 2015
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7. Precision spectroscopy of fast, hot, exotic isotopes using machine-learning-assisted event-by-event Doppler correction
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Udrescu, S. M., primary, Torres, D. A., additional, and Garcia Ruiz, R. F., additional
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- 2024
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- View/download PDF
8. Spectroscopy of short-lived radioactive molecules
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Garcia Ruiz, R. F., Berger, R., Billowes, J., Binnersley, C. L., Bissell, M. L., Breier, A. A., and Brinson, A. J.
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Molecular spectroscopy -- Methods ,Molecules -- Spectra -- Methods ,Radium -- Atomic properties -- Structure -- Methods ,Environmental issues ,Science and technology ,Zoology and wildlife conservation - Abstract
Molecular spectroscopy offers opportunities for the exploration of the fundamental laws of nature and the search for new particle physics beyond the standard model.sup.1-4. Radioactive molecules--in which one or more of the atoms possesses a radioactive nucleus--can contain heavy and deformed nuclei, offering high sensitivity for investigating parity- and time-reversal-violation effects.sup.5,6. Radium monofluoride, RaF, is of particular interest because it is predicted to have an electronic structure appropriate for laser cooling.sup.6, thus paving the way for its use in high-precision spectroscopic studies. Furthermore, the effects of symmetry-violating nuclear moments are strongly enhanced.sup.5,7-9 in molecules containing octupole-deformed radium isotopes.sup.10,11. However, the study of RaF has been impeded by the lack of stable isotopes of radium. Here we present an experimental approach to studying short-lived radioactive molecules, which allows us to measure molecules with lifetimes of just tens of milliseconds. Energetically low-lying electronic states were measured for different isotopically pure RaF molecules using collinear resonance ionisation at the ISOLDE ion-beam facility at CERN. Our results provide evidence of the existence of a suitable laser-cooling scheme for these molecules and represent a key step towards high-precision studies in these systems. Our findings will enable further studies of short-lived radioactive molecules for fundamental physics research. Measurements of low-energy electronic states of radium monofluoride validate predictions of the use of this short-lived radioactive molecule in exploring fundamental physics and provide evidence of its suitability for laser cooling., Author(s): R. F. Garcia Ruiz [sup.1] [sup.2] , R. Berger [sup.3] , J. Billowes [sup.4] , C. L. Binnersley [sup.4] , M. L. Bissell [sup.4] , A. A. Breier [sup.5] [...]
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- 2020
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9. Measurement and microscopic description of odd–even staggering of charge radii of exotic copper isotopes
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de Groote, R. P., Billowes, J., Binnersley, C. L., Bissell, M. L., Cocolios, T. E., Day Goodacre, T., Farooq-Smith, G. J., Fedorov, D. V., Flanagan, K. T., Franchoo, S., Garcia Ruiz, R. F., Gins, W., Holt, J. D., Koszorús, Á., Lynch, K. M., Miyagi, T., Nazarewicz, W., Neyens, G., Reinhard, P.-G., Rothe, S., Stroke, H. H., Vernon, A. R., Wendt, K. D. A., Wilkins, S. G., Xu, Z. Y., and Yang, X. F.
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- 2020
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10. Evidence of a sudden increase in the nuclear size of proton-rich silver-96
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Reponen, M., de Groote, R. P., Al Ayoubi, L., Beliuskina, O., Bissell, M. L., Campbell, P., Cañete, L., Cheal, B., Chrysalidis, K., Delafosse, C., de Roubin, A., Devlin, C. S., Eronen, T., Garcia Ruiz, R. F., Geldhof, S., Gins, W., Hukkanen, M., Imgram, P., Kankainen, A., Kortelainen, M., Koszorús, Á., Kujanpää, S., Mathieson, R., Nesterenko, D. A., Pohjalainen, I., Vilén, M., Zadvornaya, A., and Moore, I. D.
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- 2021
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11. Nuclear Charge Radius of Al26m and Its Implication for Vud in the Quark Mixing Matrix
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Plattner, P., primary, Wood, E., additional, Al Ayoubi, L., additional, Beliuskina, O., additional, Bissell, M. L., additional, Blaum, K., additional, Campbell, P., additional, Cheal, B., additional, de Groote, R. P., additional, Devlin, C. S., additional, Eronen, T., additional, Filippin, L., additional, Garcia Ruiz, R. F., additional, Ge, Z., additional, Geldhof, S., additional, Gins, W., additional, Godefroid, M., additional, Heylen, H., additional, Hukkanen, M., additional, Imgram, P., additional, Jaries, A., additional, Jokinen, A., additional, Kanellakopoulos, A., additional, Kankainen, A., additional, Kaufmann, S., additional, König, K., additional, Koszorús, Á., additional, Kujanpää, S., additional, Lechner, S., additional, Malbrunot-Ettenauer, S., additional, Müller, P., additional, Mathieson, R., additional, Moore, I., additional, Nörtershäuser, W., additional, Nesterenko, D., additional, Neugart, R., additional, Neyens, G., additional, Ortiz-Cortes, A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Raggio, A., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rodríguez, L. V., additional, Romero, J., additional, Sánchez, R., additional, Sommer, F., additional, Stryjczyk, M., additional, Virtanen, V., additional, Xie, L., additional, Xu, Z. Y., additional, Yang, X. F., additional, and Yordanov, D. T., additional
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- 2023
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12. Benchmark evaluation of a single frequency continuous wave OPO seeded pulsed dye amplifier for high-resolution laser spectroscopy
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Urquiza-González, M., primary, Au, M., additional, Bernerd, C., additional, Bissell, M. L., additional, van den Borne, B., additional, Chrysalidis, K., additional, Cocolios, Thomas E., additional, Fedosseev, V., additional, Flanagan, K. T., additional, Garcia Ruiz, R. F., additional, Geldhof, Sarina, additional, de Groote, R. P., additional, Koszorús, Á., additional, Hanstorp, D., additional, Heines, M., additional, Heinke, R., additional, Hens, K., additional, Khwairakpam, O. S., additional, Kujanpää, S., additional, Lalanne, L., additional, Marsh, B. A., additional, Neyens, G., additional, Nichols, M., additional, Perrett, H. A., additional, Pitman-Weymouth, D., additional, Reilly, J. R., additional, Sonnenschein, V., additional, Wendt, K., additional, Wessolek, J., additional, Wilkins, S. G., additional, and Yang, X. F., additional
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- 2023
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13. Measuring the electron affinity of polonium
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Nichols, M, Athanasakis-Kaklamanakis, M, Balasmeh, Y, Borschevsky, A, Cocolios, T E, Crosa-Rossa, R, de Groote, R P, Fajordo-Zambrano, C, Flanagan, K T, Garcia Ruiz, R F, Hanstorp, D, Koszorús, Á, Lalanne, l, Leimbach, D, Liu, Y C, Liu, Y S, Lynch, K M, McGlone, A, Neyens, G, Pastrana, F, Reilly, J, Rothe, S, Trujillo, J, van den Borne, B, Wilkins, S G, and Yang, X F
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Detectors and Experimental Techniques - Published
- 2023
14. Nuclear charge radii of ⁶²⁻⁸⁰Zn and their dependence on cross-shell proton excitations
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Xie, Liang, Yang, Xiaofei, Bieron, Jacek, Wraith, Calvin, Flanagan, Kieran T., Garcia Ruiz, R. F., Gins, Wouter, Gaigalas, Gediminas, Godefroid, Michel, Gorges, Christian, Grob, L. K., Heylen, Hanne, Jo̊nsson, Per, Kaufmann, Simon, Kowalska, Magdalena A., Krämer, Jörg, Malbrunot-Ettenauer, S., Neugart, Rainer, Neyens, Gerda, Nörtershäuser, Wilfried, Otsuka, Takaharu, Papuga, Jasna, Sánchez, Rodolfo M., Tsunoda, Yusuke, Yordanov, Deyan Todorov, Babcock, Carla, Billowes, Jonathan, Bissell, Mark L., Blaum, Klaus, Cheal, Bradley, Filippin, Livio, Xie, Liang, Yang, Xiaofei, Bieron, Jacek, Wraith, Calvin, Flanagan, Kieran T., Garcia Ruiz, R. F., Gins, Wouter, Gaigalas, Gediminas, Godefroid, Michel, Gorges, Christian, Grob, L. K., Heylen, Hanne, Jo̊nsson, Per, Kaufmann, Simon, Kowalska, Magdalena A., Krämer, Jörg, Malbrunot-Ettenauer, S., Neugart, Rainer, Neyens, Gerda, Nörtershäuser, Wilfried, Otsuka, Takaharu, Papuga, Jasna, Sánchez, Rodolfo M., Tsunoda, Yusuke, Yordanov, Deyan Todorov, Babcock, Carla, Billowes, Jonathan, Bissell, Mark L., Blaum, Klaus, Cheal, Bradley, and Filippin, Livio
- Abstract
Nuclear charge radii of ⁶²⁻⁸⁰Zn 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. It comprehensively explains the changes in isomer-to-ground state mean square charge radii of ⁶⁹⁻⁷⁹Zn, the inversion of the odd-even staggering around N = 40 and the odd-even staggering systematics of the Zn charge radii. With two protons above Z = 28, the observed charge radii of the Zn isotopic chain show a cumulative effect of different aspects of nuclear structure including single particle structure, shell closure, correlations and deformations near the proposed doubly magic nuclei, ⁶⁸Ni and ⁷⁸Ni.
- Published
- 2022
15. Changes in nuclear structure along the Mn isotopic chain studied via charge radii.
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Heylen, H., Babcock, C., Beerwerth, R., Goodacre, T. Day, Billowes, J., Bissell, M. L., Blaum, K., Garcia Ruiz, R. F., Bonnard, J., Campbell, P., Cheal, B., Fedorov, D., Day Goodacre, T., Fritzsche, S., Geithner, W., Geppert, C.-H., Gins, W., Grob, L. K., Kowalska, M., Kreim, K., Lenzi, S. M., Kreim, S., Moore, Iain D., Maass, B., Malbrunot-Ettenauer, S., Marsh, B., Neugart, R., Neyens, G., Nörtershäuser, W., Otsuka, T., Papuga, J., Rossel, R., Rothe, S., Sánchez, R., Tsunoda, Y., Wraith, C., Xie, L., Yang, X. F., Yordanov, D. T., Heylen, H., Babcock, C., Beerwerth, R., Goodacre, T. Day, Billowes, J., Bissell, M. L., Blaum, K., Garcia Ruiz, R. F., Bonnard, J., Campbell, P., Cheal, B., Fedorov, D., Day Goodacre, T., Fritzsche, S., Geithner, W., Geppert, C.-H., Gins, W., Grob, L. K., Kowalska, M., Kreim, K., Lenzi, S. M., Kreim, S., Moore, Iain D., Maass, B., Malbrunot-Ettenauer, S., Marsh, B., Neugart, R., Neyens, G., Nörtershäuser, W., Otsuka, T., Papuga, J., Rossel, R., Rothe, S., Sánchez, R., Tsunoda, Y., Wraith, C., Xie, L., Yang, X. F., and Yordanov, D. T.
- Abstract
The hyperfine spectra of Mn-51,Mn-53-64 were measured in two experimental runs using collinear laser spectroscopy at ISOLDE, CERN. Laser spectroscopy was performed on the atomic 3d(5) 4s(2) S-6(5/2) -> 3d(5) 4s4p P-6(3/2) and ionic 3d(5) 4s S-5(2) -> 3d(5) 4p P-5(3) transitions, yielding two sets of isotope shifts. The mass and field shift factors for both transitions have been calculated in the multiconfiguration Dirac-Fock framework and were combined with a King plot analysis in order to obtain a consistent set of mean-square charge radii which, together with earlier work on neutron-deficient Mn, allow the study of nuclear structure changes from N = 25 across N = 28 up to N = 39. A clear development of deformation is observed towards N = 40, confirming the conclusions of the nuclear moments studies. From a Monte Carlo shell-model study of the shape in the Mn isotopic chain, it is suggested that the observed development of deformation is not only due to an increase in static prolate deformation but also due to shape fluctuations and triaxiality. The changes in mean-square charge radii are well reproduced using the Duflo-Zuker formula except in the case of large deformation.
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- 2022
16. Spectroscopy of short-lived radioactive molecules
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Garcia Ruiz, R. F., Berger, R., Billowes, J., Binnersley, C. L., Bissell, M. L., Breier, A. A., Brinson, A. J., Chrysalidis, K., Cocolios, T. E., Cooper, B. S., Flanagan, K. T., Giesen, T. F., de Groote, R. P., Franchoo, S., Gustafsson, F. P., Isaev, T. A., Koszorús, Á., Neyens, G., Perrett, H. A., Ricketts, C. M., Rothe, S., Schweikhard, L., Vernon, A. R., Wendt, K. D. A., Wienholtz, F., Wilkins, S. G., Yang, X. F., Garcia Ruiz, R. F., Berger, R., Billowes, J., Binnersley, C. L., Bissell, M. L., Breier, A. A., Brinson, A. J., Chrysalidis, K., Cocolios, T. E., Cooper, B. S., Flanagan, K. T., Giesen, T. F., de Groote, R. P., Franchoo, S., Gustafsson, F. P., Isaev, T. A., Koszorús, Á., Neyens, G., Perrett, H. A., Ricketts, C. M., Rothe, S., Schweikhard, L., Vernon, A. R., Wendt, K. D. A., Wienholtz, F., Wilkins, S. G., and Yang, X. F.
- Abstract
© 2020, The Author(s). Molecular spectroscopy offers opportunities for the exploration of the fundamental laws of nature and the search for new particle physics beyond the standard model1–4. Radioactive molecules—in which one or more of the atoms possesses a radioactive nucleus—can contain heavy and deformed nuclei, offering high sensitivity for investigating parity- and time-reversal-violation effects5,6. Radium monofluoride, RaF, is of particular interest because it is predicted to have an electronic structure appropriate for laser cooling6, thus paving the way for its use in high-precision spectroscopic studies. Furthermore, the effects of symmetry-violating nuclear moments are strongly enhanced5,7–9 in molecules containing octupole-deformed radium isotopes10,11. However, the study of RaF has been impeded by the lack of stable isotopes of radium. Here we present an experimental approach to studying short-lived radioactive molecules, which allows us to measure molecules with lifetimes of just tens of milliseconds. Energetically low-lying electronic states were measured for different isotopically pure RaF molecules using collinear resonance ionisation at the ISOLDE ion-beam facility at CERN. Our results provide evidence of the existence of a suitable laser-cooling scheme for these molecules and represent a key step towards high-precision studies in these systems. Our findings will enable further studies of short-lived radioactive molecules for fundamental physics research.
- Published
- 2022
17. Laser spectroscopy of indium Rydberg atom bunches by electric field ionization
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Vernon, A. R., Ricketts, C. M., Billowes, J., Cocolios, T. E., Cooper, B. S., Flanagan, K. T., Garcia Ruiz, R. F., Gustafsson, F. P., Neyens, G., Perrett, H. A., Sahoo, B. K., Wang, Q., Waso, F. J., Yang, X. F., Vernon, A. R., Ricketts, C. M., Billowes, J., Cocolios, T. E., Cooper, B. S., Flanagan, K. T., Garcia Ruiz, R. F., Gustafsson, F. P., Neyens, G., Perrett, H. A., Sahoo, B. K., Wang, Q., Waso, F. J., and Yang, X. F.
- Abstract
© 2020, The Author(s). 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. The setup was tested at the Collinear Resonance Ionization Spectroscopy experiment at ISOLDE-CERN to perform high-resolution measurements of transitions in the indium atom from the 5s25d2D5/2 and 5s25d2D3/2 states to 5s 2np 2P and 5s2nf2F Rydberg states, up to a principal quantum number of n= 72. The extracted Rydberg level energies were used to re-evaluate the ionization potential of the indium atom to be 46,670.107(4)cm-1. The nuclear magnetic dipole and nuclear electric quadrupole hyperfine structure constants and level isotope shifts of the 5s25d2D5/2 and 5s25d2D3/2 states were determined for 113 , 115In. The results are compared to calculations using relativistic coupled-cluster theory. A good agreement is found with the ionization potential and isotope shifts, while disagreement of hyperfine structure constants indicates an increased importance of electron correlations in these excited atomic states. With the aim of further increasing the detection sensitivity for measurements on exotic isotopes, a systematic study of the field-ionization arrangement implemented in the work was performed at the same time and an improved design was simulated and is presented. The improved design offers increased background suppression independent of the distance from field ionization to ion detection.
- Published
- 2022
18. Tin resonance-ionization schemes for atomic- and nuclear-structure studies
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Gustafsson, F. P., Ricketts, C. M., Reitsma, M. L., Garcia Ruiz, R. F., Bai, S. W., Berengut, J. C., Billowes, J., Binnersley, C. L., Borschevsky, A., Cocolios, T. E., Cooper, B. S., de Groote, R. P., Flanagan, K. T., Koszorús, Á., Neyens, G., Perrett, H. A., Vernon, A. R., Wang, Q., Wilkins, S. G., Yang, X. F., Gustafsson, F. P., Ricketts, C. M., Reitsma, M. L., Garcia Ruiz, R. F., Bai, S. W., Berengut, J. C., Billowes, J., Binnersley, C. L., Borschevsky, A., Cocolios, T. E., Cooper, B. S., de Groote, R. P., Flanagan, K. T., Koszorús, Á., Neyens, G., Perrett, H. A., Vernon, A. R., Wang, Q., Wilkins, S. G., and Yang, X. F.
- Abstract
© 2020 authors. This paper presents high-precision spectroscopic measurements of atomic tin using five different resonance-ionization schemes performed with the collinear resonance-ionization spectroscopy technique. Isotope shifts were measured for the stable tin isotopes from the 5s25p2P0,1,23 and 1S0 to the 5s25p6sP11,P1,23 and 5s25p7s1P1 atomic levels. The magnetic dipole hyperfine constants Ahf have been extracted for six atomic levels with electron angular momentum J>0 from the hyperfine structures of nuclear spin I=1/2 tin isotopes, Sn115,117,119. State-of-the-art atomic calculations using a relativistic Fock-space coupled-cluster method and the configuration interaction approach combined with many-body perturbation theory allow accurate and reliable calculations of both field- and mass-shift factors for the studied transitions, in addition to the hyperfine magnetic fields and electric-field gradients of the atomic levels. The excellent agreement with the experimental results highlights the accuracy of modern atomic theory and establishes an important foundation for precision measurements of nuclear moments and charge radii of the most exotic isotopes of tin.
- Published
- 2022
19. Large Shape Staggering in Neutron-Deficient Bi Isotopes
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Barzakh, A., Andreyev, A. N., Raison, C., Cubiss, J. G., Van Duppen, P., Péru, S., Hilaire, S., Goriely, S., Andel, B., Antalic, S., Al Monthery, M., Berengut, J. C., Bieroifmmode nelse ń, J., Bissell, M. L., Borschevsky, A., Chrysalidis, K., Cocolios, T. E., Day Goodacre, T., Dognon, J.-P., Elantkowska, M., Eliav, E., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Gaffney, L. P., Garcia Ruiz, R. F., Godefroid, M., Granados, C., Harding, R. D., Heinke, R., Huyse, M., Karls, J., Larmonier, P., Li, J. G., Lynch, K. M., Maison, D. E., Marsh, B. A., Molkanov, P., Mosat, P., Oleynichenko, A. V., Panteleev, V., Pyykkö, P., Reitsma, M. L., Rezynkina, K., Rossel, R. E., Rothe, S., Ruczkowski, J., Schiffmann, S., Seiffert, C., and Seliverstov, M. D.
- Published
- 2021
20. First results from the CRIS experiment
- Author
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Flanagan, K. T., Billowes, J., Bissell, M. L., Budinčević, I., Cocolios, T. E., de Groote, R. P., De Schepper, S., Fedosseev, V. N., Franchoo, S., Garcia Ruiz, R. F., Heylen, H., Lynch, K. M., Marsh, B. A., Neyens, G., Procter, T. J., Rossel, R. E., Rothe, S., Strashnov, I., Stroke, H. H., and Wendt, K. D. A.
- Published
- 2014
- Full Text
- View/download PDF
21. Neutron occupancies and single-particle energies across the stable tin isotopes
- Author
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Szwec, S. V., primary, Sharp, D. K., additional, Kay, B. P., additional, Freeman, S. J., additional, Schiffer, J. P., additional, Adsley, P., additional, Binnersley, C., additional, de Séréville, N., additional, Faestermann, T., additional, Garcia Ruiz, R. F., additional, Hammache, F., additional, Hertenberger, R., additional, Meyer, A., additional, Portail, C., additional, Stefan, I., additional, Vernon, A., additional, Wilkins, S., additional, and Wirth, H.-F., additional
- Published
- 2021
- Full Text
- View/download PDF
22. Large Shape Staggering in Neutron-Deficient Bi Isotopes
- Author
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Barzakh, A., primary, Andreyev, A. N., additional, Raison, C., additional, Cubiss, J. G., additional, Van Duppen, P., additional, Péru, S., additional, Hilaire, S., additional, Goriely, S., additional, Andel, B., additional, Antalic, S., additional, Al Monthery, M., additional, Berengut, J. C., additional, Bieroń, J., additional, Bissell, M. L., additional, Borschevsky, A., additional, Chrysalidis, K., additional, Cocolios, T. E., additional, Day Goodacre, T., additional, Dognon, J.-P., additional, Elantkowska, M., additional, Eliav, E., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Gaffney, L. P., additional, Garcia Ruiz, R. F., additional, Godefroid, M., additional, Granados, C., additional, Harding, R. D., additional, Heinke, R., additional, Huyse, M., additional, Karls, J., additional, Larmonier, P., additional, Li, J. G., additional, Lynch, K. M., additional, Maison, D. E., additional, Marsh, B. A., additional, Molkanov, P., additional, Mosat, P., additional, Oleynichenko, A. V., additional, Panteleev, V., additional, Pyykkö, P., additional, Reitsma, M. L., additional, Rezynkina, K., additional, Rossel, R. E., additional, Rothe, S., additional, Ruczkowski, J., additional, Schiffmann, S., additional, Seiffert, C., additional, Seliverstov, M. D., additional, Sels, S., additional, Skripnikov, L. V., additional, Stryjczyk, M., additional, Studer, D., additional, Verlinde, M., additional, Wilman, S., additional, and Zaitsevskii, A. V., additional
- Published
- 2021
- Full Text
- View/download PDF
23. Probing the single-particle behavior above Sn132 via electromagnetic moments of Sb133,134 and N=82 isotones
- Author
-
Lechner, S., primary, Xu, Z. Y., additional, Bissell, M. L., additional, Blaum, K., additional, Cheal, B., additional, De Gregorio, G., additional, Devlin, C. S., additional, Garcia Ruiz, R. F., additional, Gargano, A., additional, Heylen, H., additional, Imgram, P., additional, Kanellakopoulos, A., additional, Koszorús, Á., additional, Malbrunot-Ettenauer, S., additional, Neugart, R., additional, Neyens, G., additional, Nörtershäuser, W., additional, Plattner, P., additional, Rodríguez, L. V., additional, Yang, X. F., additional, and Yordanov, D. T., additional
- Published
- 2021
- Full Text
- View/download PDF
24. $beta$-delayed fission of isomers in $^188Bi$
- Author
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Andel, B., Andreyev, A. N., Antalic, S., Al Monthery, M., Barzakh, A., Bissell, M. L., Chrysalidis, K., Cocolios, T. E., Cubiss, J. G., Day Goodacre, T., Dubray, N., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Gaffney, L. P., Garcia Ruiz, R. F., Goriely, S., Granados, C., Harding, R. D., Heinke, R., Hilaire, S., Huyse, M., Lemaître, J.-F., Lynch, K. M., Marsh, B. A., Molkanov, P., Mosat, P., Péru, S., Raison, C., Rothe, S., Seiffert, C., Seliverstov, M. D., Sels, S., Studer, D., Sundberg, J., and Van Duppen, P.
- Published
- 2020
25. Searches for new sources of CP violation using molecules as quantum sensors
- Author
-
Hutzler, N. R., Borschevsky, A., Budker, D., DeMille, D., Flambaum, V. V., Gabrielse, G., Garcia Ruiz, R. F., Jayich, A. M., Orozco, L. A., Ramsey-Musolf, M., Reece, M., Safronova, M. S., Singh, J. T., Tarbutt, M. R., Zelevinsky, T., Hutzler, N. R., Borschevsky, A., Budker, D., DeMille, D., Flambaum, V. V., Gabrielse, G., Garcia Ruiz, R. F., Jayich, A. M., Orozco, L. A., Ramsey-Musolf, M., Reece, M., Safronova, M. S., Singh, J. T., Tarbutt, M. R., and Zelevinsky, T.
- Abstract
We discuss how molecule-based searches offer complementary probes to study the violation of fundamental symmetries. These experiments have the potential to probe not only the electron EDM, but also hadronic CPV phenomena. Future experimental developments will offer generic sensitivity to probe flavor neutral sources of both leptonic and hadronic CPV at scales of ≥ 100 TeV, and flavor changing CPV at scales of ≥1000 TeV.
- Published
- 2020
26. Perspectives for the VITO beam line at ISOLDE, CERN
- Author
-
Garcia Ruiz R. F., Bissell M.L., Gottberg A., Stachura M., Hemmingsen L., Neyens G., and Severijns N.
- Subjects
Physics ,QC1-999 - Abstract
By using polarized ion beams in combination with the β-NMR technique, the Versatile Ion-polarized Techniques On-line (VITO) experiment at ISOLDE, CERN links together expertise from different fields in an unique experimental setup. An overview of the experimental techniques and a general description of the newly designed beam line are presented. Potential uses in multidisciplinary research and perspectives for future experiments are discussed.
- Published
- 2015
- Full Text
- View/download PDF
27. Nuclear moments of germanium isotopes near N=40
- Author
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Kanellakopoulos, A., primary, Yang, X. F., additional, Bissell, M. L., additional, Reitsma, M. L., additional, Bai, S. W., additional, Billowes, J., additional, Blaum, K., additional, Borschevsky, A., additional, Cheal, B., additional, Devlin, C. S., additional, Garcia Ruiz, R. F., additional, Heylen, H., additional, Kaufmann, S., additional, König, K., additional, Koszorús, Á., additional, Lechner, S., additional, Malbrunot-Ettenauer, S., additional, Neugart, R., additional, Neyens, G., additional, Nörtershäuser, W., additional, Ratajczyk, T., additional, Rodríguez, L. V., additional, Sels, S., additional, Wang, S. J., additional, Xie, L., additional, Xu, Z. Y., additional, and Yordanov, D. T., additional
- Published
- 2020
- Full Text
- View/download PDF
28. Tin resonance-ionization schemes for atomic- and nuclear-structure studies
- Author
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Gustafsson, F. P., primary, Ricketts, C. M., additional, Reitsma, M. L., additional, Garcia Ruiz, R. F., additional, Bai, S. W., additional, Berengut, J. C., additional, Billowes, J., additional, Binnersley, C. L., additional, Borschevsky, A., additional, Cocolios, T. E., additional, Cooper, B. S., additional, de Groote, R. P., additional, Flanagan, K. T., additional, Koszorús, Á., additional, Neyens, G., additional, Perrett, H. A., additional, Vernon, A. R., additional, Wang, Q., additional, Wilkins, S. G., additional, and Yang, X. F., additional
- Published
- 2020
- Full Text
- View/download PDF
29. Doubly-magic character of Sn132 studied via electromagnetic moments of Sn133
- Author
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Rodríguez, L. V., primary, Balabanski, D. L., additional, Bissell, M. L., additional, Blaum, K., additional, Cheal, B., additional, De Gregorio, G., additional, Ekman, J., additional, Garcia Ruiz, R. F., additional, Gargano, A., additional, Georgiev, G., additional, Gins, W., additional, Gorges, C., additional, Heylen, H., additional, Kanellakopoulos, A., additional, Kaufmann, S., additional, Lagaki, V., additional, Lechner, S., additional, Maaß, B., additional, Malbrunot-Ettenauer, S., additional, Neugart, R., additional, Neyens, G., additional, Nörtershäuser, W., additional, Sailer, S., additional, Sánchez, R., additional, Schmidt, S., additional, Wehner, L., additional, Wraith, C., additional, Xie, L., additional, Xu, Z. Y., additional, Yang, X. F., additional, and Yordanov, D. T., additional
- Published
- 2020
- Full Text
- View/download PDF
30. β -delayed fission of isomers in Bi188
- Author
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Andel, B., primary, Andreyev, A. N., additional, Antalic, S., additional, Al Monthery, M., additional, Barzakh, A., additional, Bissell, M. L., additional, Chrysalidis, K., additional, Cocolios, T. E., additional, Cubiss, J. G., additional, Day Goodacre, T., additional, Dubray, N., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Gaffney, L. P., additional, Garcia Ruiz, R. F., additional, Goriely, S., additional, Granados, C., additional, Harding, R. D., additional, Heinke, R., additional, Hilaire, S., additional, Huyse, M., additional, Lemaître, J.-F., additional, Lynch, K. M., additional, Marsh, B. A., additional, Molkanov, P., additional, Mosat, P., additional, Péru, S., additional, Raison, C., additional, Rothe, S., additional, Seiffert, C., additional, Seliverstov, M. D., additional, Sels, S., additional, Studer, D., additional, Sundberg, J., additional, and Van Duppen, P., additional
- Published
- 2020
- Full Text
- View/download PDF
31. Laser spectroscopy of indium Rydberg atom bunches by electric field ionization
- Author
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Vernon, A. R., primary, Ricketts, C. M., additional, Billowes, J., additional, Cocolios, T. E., additional, Cooper, B. S., additional, Flanagan, K. T., additional, Garcia Ruiz, R. F., additional, Gustafsson, F. P., additional, Neyens, G., additional, Perrett, H. A., additional, Sahoo, B. K., additional, Wang, Q., additional, Waso, F. J., additional, and Yang, X. F., additional
- Published
- 2020
- Full Text
- View/download PDF
32. Beyond the charge radius: The information content of the fourth radial moment
- Author
-
Reinhard, P.-G., primary, Nazarewicz, W., additional, and Garcia Ruiz, R. F., additional
- Published
- 2020
- Full Text
- View/download PDF
33. Analytic response relativistic coupled-cluster theory: the first application to indium isotope shifts
- Author
-
Sahoo, B K, primary, Vernon, A R, additional, Garcia Ruiz, R F, additional, Binnersley, C L, additional, Billowes, J, additional, Bissell, M L, additional, Cocolios, T E, additional, Farooq-Smith, G J, additional, Flanagan, K T, additional, Gins, W, additional, de Groote, R P, additional, Koszorús, Á, additional, Neyens, G, additional, Lynch, K M, additional, Parnefjord-Gustafsson, F, additional, Ricketts, C M, additional, Wendt, K D A, additional, Wilkins, S G, additional, and Yang, X F, additional
- Published
- 2020
- Full Text
- View/download PDF
34. Doubly-magic character of Sn132 studied via electromagnetic moments of Sn133
- Author
-
Rodríguez, L. V., Balabanski, D. L., Bissell, M. L., Blaum, K., Cheal, B., De Gregorio, G., Ekman, J., Garcia Ruiz, R. F., Gargano, A., Georgiev, G., Gins, W., Gorges, C., Heylen, H., Kanellakopoulos, A., Kaufmann, S., Lagaki, V., Lechner, S., Maaß, B., Malbrunot-Ettenauer, S., Neugart, R., Neyens, G., Nörtershäuser, W., Sailer, S., Sánchez, R., Schmidt, S., Wehner, L., Wraith, C., Xie, L., Xu, Z. Y., Yang, X. F., and Yordanov, D. T.
- Subjects
ddc - Published
- 2019
35. Nuclear charge radii of Zn and their dependence on cross-shell proton excitations
- Author
-
Xie, Liang, Yang, Xiaofei, Bieron, Jacek, Wraith, Calvin, Flanagan, Kieran T., Garcia Ruiz, R. F., Gins, Wouter, Gaigalas, Gediminas, Godefroid, Michel, Gorges, Christian, Grob, L. K., Heylen, Hanne, Jo��nsson, Per, Kaufmann, Simon, Kowalska, Magdalena A., Kr��mer, J��rg, Malbrunot-Ettenauer, S., Neugart, Rainer, Neyens, Gerda, N��rtersh��user, Wilfried, Otsuka, Takaharu, Papuga, Jasna, S��nchez, Rodolfo M., Tsunoda, Yusuke, Yordanov, Deyan Todorov, Babcock, Carla, Billowes, Jonathan, Bissell, Mark L., Blaum, Klaus, Cheal, Bradley, and Filippin, Livio
- Subjects
Nuclear Theory ,Nuclear Experiment - Abstract
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. It comprehensively explains the changes in isomer-to-ground state mean square charge radii of $^{69−79}$Zn, the inversion of the odd-even staggering around N=40 and the odd-even staggering systematics of the Zn charge radii. With two protons above Z=28, the observed charge radii of the Zn isotopic chain show a cumulative effect of different aspects of nuclear structure including single particle structure, shell closure, correlations and deformations near the proposed doubly magic nuclei, $^{68}$Ni and $^{78}$Ni.
- Published
- 2019
36. Investigating the large deformation of the 5/2(+) isomeric state in Zn-73: An indicator for triaxiality
- Author
-
Yang, X. F., Tsunoda, Y., Babcock, C., Billowes, J., Bissell, M. L., Blaum, K., Cheal, B., Flanagan, K. T., Garcia Ruiz, R. F., Gins, W., Gorges, C., Grob, L. K., Heylen, H., Kaufmann, S., Kowalska, M., Krämer, J., Malbrunot-Ettenauer, S., Neugart, R., Neyens, G., Nörtershäuser, W., Otsuka, T., Papuga, J., Sánchez, R., Wraith, C., Xie, L., and Yordanov, D. T.
- Subjects
Nuclear Theory ,Nuclear Experiment - Abstract
Recently reported nuclear spins and moments of neutron-rich Zn isotopes measured at ISOLDE-CERN [C. Wraith et al., Phys. Lett. B 771, 385 (2017)PYLBAJ0370-269310.1016/j.physletb.2017.05.085] show an uncommon behavior of the isomeric state in Zn73. Additional details relating to the measurement and analysis of the Zn73m hyperfine structure are addressed here to further support its spin-parity assignment 5/2+ and to estimate its half-life. A systematic investigation of this 5/2+ isomer indicates that significant collectivity appears due to proton/neutron E2 excitations across the proton Z = 28 and neutron N = 50 shell gaps. This is confirmed by the good agreement of the observed quadrupole moments with large scale Monte Carlo shell model calculations. In addition, potential energy surface calculations in combination with T plots reveal a triaxial shape for this isomeric state.
- Published
- 2018
- Full Text
- View/download PDF
37. Precision measurements of the charge radii of potassium isotopes
- Author
-
Koszorús, Á., primary, Yang, X. F., additional, Billowes, J., additional, Binnersley, C. L., additional, Bissell, M. L., additional, Cocolios, T. E., additional, Farooq-Smith, G. J., additional, de Groote, R. P., additional, Flanagan, K. T., additional, Franchoo, S., additional, Garcia Ruiz, R. F., additional, Geldhof, S., additional, Gins, W., additional, Kanellakopoulos, A., additional, Lynch, K. M., additional, Neyens, G., additional, Stroke, H. H., additional, Vernon, A. R., additional, Wendt, K. D. A., additional, and Wilkins, S. G., additional
- Published
- 2019
- Full Text
- View/download PDF
38. Laser Spectroscopy of Neutron-Rich Tin Isotopes: A Discontinuity in Charge Radii across the N=82 Shell Closure
- Author
-
Gorges, C., primary, Rodríguez, L. V., additional, Balabanski, D. L., additional, Bissell, M. L., additional, Blaum, K., additional, Cheal, B., additional, Garcia Ruiz, R. F., additional, Georgiev, G., additional, Gins, W., additional, Heylen, H., additional, Kanellakopoulos, A., additional, Kaufmann, S., additional, Kowalska, M., additional, Lagaki, V., additional, Lechner, S., additional, Maaß, B., additional, Malbrunot-Ettenauer, S., additional, Nazarewicz, W., additional, Neugart, R., additional, Neyens, G., additional, Nörtershäuser, W., additional, Reinhard, P.-G., additional, Sailer, S., additional, Sánchez, R., additional, Schmidt, S., additional, Wehner, L., additional, Wraith, C., additional, Xie, L., additional, Xu, Z. Y., additional, Yang, X. F., additional, and Yordanov, D. T., additional
- Published
- 2019
- Full Text
- View/download PDF
39. Probing the Ga 31 ground-state properties in the region near Z=28 with high-resolution laser spectroscopy
- Author
-
Farooq-Smith, G. J., Vernon, A. R., Billowes, J., Binnersley, C. L., Bissell, M. L., Cocolios, T. E., Day Goodacre, T., De Groote, R. P., Flanagan, K. T., Franchoo, S., Garcia Ruiz, R. F., Gins, W., Lynch, K. M., Marsh, B. A., Neyens, G., Rothe, S., Stroke, H. H., Wilkins, S. G., and Yang, X. F.
- Abstract
Magnetic-dipole and electric-quadrupole moments for Ga65,67,69,75,79-82 are reported using the Collinear Resonance Ionization Spectroscopy (CRIS) technique at the ISOLDE facility, CERN. The moments of Ga65 have been measured for the first time: μ=+1.775(3)μN and Qs=+21.0(15)efm2. These results are compared to shell-model calculations using the GXPF1 and JUN45 interactions and the trends of the moments approaching the region of the doubly magic Ni56 are discussed. Additionally, new values for the change in mean-square charge radii for Ga65 and Ga67 allow investigation into the odd-even staggering in the region below N=40.
- Published
- 2017
- Full Text
- View/download PDF
40. Probing the $_{31}\mathrm{Ga}$ ground-state properties in the region near $Z=28$ with high-resolution laser spectroscopy
- Author
-
Farooq-Smith, G J, Vernon, A R, Billowes, J, Binnersley, C L, Bissell, M L, Cocolios, T E, Day Goodacre, T, de Groote, R P, Flanagan, K T, Franchoo, S, Garcia Ruiz, R F, Gins, W, Lynch, K M, Marsh, B A, Neyens, G, Rothe, S, Stroke, H H, Wilkins, S G, Yang, X F, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
- Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] ,Nuclear Physics - Theory - Abstract
International audience; Magnetic-dipole and electric-quadrupole moments for $^{65,67,69,75,79–82}\mathrm{Ga}$ are reported using the Collinear Resonance Ionization Spectroscopy (CRIS) technique at the ISOLDE facility, CERN. The moments of $^{65}\mathrm{Ga}$ have been measured for the first time: $\mu =+1.775(3)\mu_N$ and $Q_s=+21.0(15)e\mathrm{fm}2$. These results are compared to shell-model calculations using the GXPF1 and JUN45 interactions and the trends of the moments approaching the region of the doubly magic $^{56}\mathrm{Ni}$ are discussed. Additionally, new values for the change in mean-square charge radii for $^{65}\mathrm{Ga}$ and $^{67}\mathrm{Ga}$ allow investigation into the odd-even staggering in the region below $N=40$.
- Published
- 2017
- Full Text
- View/download PDF
41. Dipole and quadrupole moments of $^{73-78}$Cu as a test of the robustness of the $Z=28$ shell closure near $^{78}$Ni
- Author
-
De Groote, R.P., Billowes, J., Binnersley, C.L., Bissell, M.L., Cocolios, T.E., Day Goodacre, T., Farooq-Smith, G.J., Fedorov, D.V., Flanagan, K.T., Franchoo, S., Garcia Ruiz, R. F., Koszorús, Á., Lynch, K.M., Neyens, G., Nowacki, F., Otsuka, T., Rothe, S., Stroke, H.H., Tsunoda, Y., Vernon, A.R., Wendt, K.D.A., Wilkins, S.G., Xu, Z.Y., Yang, X.F., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Pluridisciplinaire Hubert Curien ( IPHC ), and Université de Strasbourg ( UNISTRA ) -Centre National de la Recherche Scientifique ( CNRS )
- Subjects
FOS: Physical sciences ,Nuclear Physics - Experiment ,Nuclear Experiment (nucl-ex) ,[ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex] ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,nucl-ex ,Nuclear Experiment - Abstract
Nuclear spins and precise values of the magnetic dipole and electric quadrupole moments of the ground states of neutron-rich Cu73–78 isotopes were measured using the Collinear Resonance Ionization Spectroscopy (CRIS) experiment at the CERN On-Line Isotope Mass Separator (ISOLDE) facility. The nuclear moments of the less exotic Cu73,75 isotopes were remeasured with similar precision, yielding values that are consistent with earlier measurements. The moments of the odd-odd isotopes, and 2978Cu (N=49) in particular, are used to investigate excitations of the assumed doubly magic Ni78 core through comparisons with large-scale shell-model calculations. Despite the narrowing of the Z=28 shell gap between N∼45 and N=50, the magicity of Z=28 and N=50 is restored toward Ni78. This is due to weakened dynamical correlations, as clearly probed by the present moment measurements. Nuclear spins and precise values of the magnetic dipole and electric quadrupole moments of the ground-states of neutron-rich $^{76-78}$Cu isotopes were measured using the Collinear Resonance Ionization Spectroscopy (CRIS) experiment at ISOLDE, CERN. The nuclear moments of the less exotic $^{73,75}$Cu isotopes were re-measured with similar precision, yielding values that are consistent with earlier measurements. The moments of the odd-odd isotopes, and $^{78}_{29}$Cu ($N=49$) in particular, are used to investigate excitations of the assumed doubly-magic $^{78}$Ni core through comparisons with large-scale shell-model calculations. Despite the narrowing of the $Z=28$ shell gap between $N\sim45$ and $N=50$, the magicity of $Z=28$ and $N=50$ is restored towards $^{78}$Ni. This is due to weakened dynamical correlations, as clearly probed by the present moment measurements.
- Published
- 2017
- Full Text
- View/download PDF
42. High-Precision Multiphoton Ionization of Accelerated Laser-Ablated Species
- Author
-
Garcia Ruiz, R. F., primary, Vernon, A. R., additional, Binnersley, C. L., additional, Sahoo, B. K., additional, Bissell, M., additional, Billowes, J., additional, Cocolios, T. E., additional, Gins, W., additional, de Groote, R. P., additional, Flanagan, K. T., additional, Koszorus, A., additional, Lynch, K. M., additional, Neyens, G., additional, Ricketts, C. M., additional, Wendt, K. D. A., additional, Wilkins, S. G., additional, and Yang, X. F., additional
- Published
- 2018
- Full Text
- View/download PDF
43. Investigating the large deformation of the 5/2+ isomeric state in Zn73 : An indicator for triaxiality
- Author
-
Yang, X. F., primary, Tsunoda, Y., additional, Babcock, C., additional, Billowes, J., additional, Bissell, M. L., additional, Blaum, K., additional, Cheal, B., additional, Flanagan, K. T., additional, Garcia Ruiz, R. F., additional, Gins, W., additional, Gorges, C., additional, Grob, L. K., additional, Heylen, H., additional, Kaufmann, S., additional, Kowalska, M., additional, Krämer, J., additional, Malbrunot-Ettenauer, S., additional, Neugart, R., additional, Neyens, G., additional, Nörtershäuser, W., additional, Otsuka, T., additional, Papuga, J., additional, Sánchez, R., additional, Wraith, C., additional, Xie, L., additional, and Yordanov, D. T., additional
- Published
- 2018
- Full Text
- View/download PDF
44. Laser-spectroscopy studies of the nuclear structure of neutron-rich radium
- Author
-
Lynch, K. M., primary, Wilkins, S. G., additional, Billowes, J., additional, Binnersley, C. L., additional, Bissell, M. L., additional, Chrysalidis, K., additional, Cocolios, T. E., additional, Goodacre, T. Day, additional, de Groote, R. P., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Flanagan, K. T., additional, Franchoo, S., additional, Garcia Ruiz, R. F., additional, Gins, W., additional, Heinke, R., additional, Koszorús, Á., additional, Marsh, B. A., additional, Molkanov, P. L., additional, Naubereit, P., additional, Neyens, G., additional, Ricketts, C. M., additional, Rothe, S., additional, Seiffert, C., additional, Seliverstov, M. D., additional, Stroke, H. H., additional, Studer, D., additional, Vernon, A. R., additional, Wendt, K. D. A., additional, and Yang, X. F., additional
- Published
- 2018
- Full Text
- View/download PDF
45. Isomer Shift and Magnetic Moment of the Long-Lived 1/2+ Isomer in Zn493079: Signature of Shape Coexistence near Ni78:Signature of Shape Coexistence near Ni 78
- Author
-
Yang, X. F., Wraith, C., Xie, Liang, Babcock, C., Billowes, Jonathan, Bissell, Mark, Blaum, K., Cheal, B., Flanagan, Keiron, Garcia Ruiz, R. F., Gins, W., Gorges, C., Grob, L. K., Heylen, H., Kaufmann, S., Kowalska, M., Kraemer, J., Malbrunot-Ettenauer, S., Neugart, R., Neyens, G., Nörtershäuser, W., Papuga, J., Sánchez, R., and Yordanov, D. T.
- Abstract
Collinear laser spectroscopy is performed on the Zn493079 isotope at ISOLDE-CERN. The existence of a long-lived isomer with a few hundred milliseconds half-life is confirmed, and the nuclear spins and moments of the ground and isomeric states in Zn79 as well as the isomer shift are measured. From the observed hyperfine structures, spins I=9/2 and I=1/2 are firmly assigned to the ground and isomeric states. The magnetic moment μ (Zn79)=-1.1866(10)μN, confirms the spin-parity 9/2+ with a νg9/2-1 shell-model configuration, in excellent agreement with the prediction from large scale shell-model theories. The magnetic moment μ (Zn79m)=-1.0180(12)μN supports a positive parity for the isomer, with a wave function dominated by a 2h-1p neutron excitation across the N=50 shell gap. The large isomer shift reveals an increase of the intruder isomer mean square charge radius with respect to that of the ground state, δ rc2 79,79m=+0.204(6) fm2, providing first evidence of shape coexistence.
- Published
- 2016
- Full Text
- View/download PDF
46. Combined high-resolution laser spectroscopy and nuclear decay spectroscopy for the study of the low-lying states in Fr 206, at 202, and Bi 198
- Author
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Lynch, K. M., Cocolios, T. E., Billowes, J., Bissell, M. L., Budinčević, I., Day Goodacre, T., De Groote, R. P., Farooq-Smith, G. J., Fedosseev, V. N., Flanagan, K. T., Franchoo, S., Garcia Ruiz, R. F., Heylen, H., Li, R., Marsh, B. A., Neyens, G., Rossel, R. E., Rothe, S., Stroke, H. H., Wendt, K. D A, Wilkins, S. G., and Yang, X.
- Subjects
Physics::Atomic and Molecular Clusters ,Physics::Atomic Physics ,Physics::Chemical Physics ,Nuclear Experiment - Abstract
High-resolution laser spectroscopy was performed on Fr206 with the collinear resonance ionization spectroscopy (CRIS) experiment at CERN-ISOLDE. The hyperfine structure and isotope shift of the ground, first isomeric and second isomeric states were measured. The hyperfine components were unambiguously assigned to each nuclear state by means of laser-assisted nuclear decay spectroscopy. The branching ratios in the α decay of Fr206 and At202 were also measured for the first time with isomerically purified beams. The extracted hindrance factors allow determination of the spin of the ground, first isomeric, and second isomeric states in At202 and Bi198.
- Published
- 2016
- Full Text
- View/download PDF
47. Laser and decay spectroscopy of the short-lived isotope Fr 214 in the vicinity of the N = 126 shell closure
- Author
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Farooq-Smith, G. J., Cocolios, T. E., Billowes, J., Bissell, M. L., Budinčević, I., Day Goodacre, T., de Groote, R. P., Fedosseev, V. N., Flanagan, K. T., Franchoo, S., Garcia Ruiz, R. F., Heylen, H., Li, R., Lynch, K. M., Marsh, B. A., Neyens, G., Rossel, R. E., Rothe, S., Stroke, H. H., Wendt, K. D. A., Wilkins, S. G., Yang, X. F., Institut de Physique Nucléaire d'Orsay (IPNO), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
- Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] - Abstract
International audience; Combined decay and laser spectroscopy measurements of the isotope Fr214 are reported, using the collinear resonance ionization spectroscopy (CRIS) technique at the ISOLDE facility at CERN. For the Iπ=(1−) spin assignment, the g-factor value of g(Fr214)=+0.241(16) corresponds to a relatively pure (π1h9/2 ⊗ ν2g9/2) ground-state configuration. An alternative interpretation with g(Fr214)=+0.144(10), for a (2−) spin assignment suggests a greater contribution of configuration mixing with the ν1i11/2 orbital. As the N=126 shell closure is passed, a kink is observed at the δ⟨r2⟩213,214 value, which is analogous to the behavior observed in the neighboring isotopic chains.
- Published
- 2016
- Full Text
- View/download PDF
48. Isomer shift and magnetic moment of the long-lived 1/2$^{+}$ isomer in $^{79}_{30}$Zn$_{49}$: signature of shape coexistence near $^{78}$Ni
- Author
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Yang, X.F., Wraith, C., Xie, L., Babcock, C., Billowes, J., Bissell, M.L., Blaum, K., Cheal, B., Flanagan, K.T., Garcia Ruiz, R. F., Gins, W., Gorges, C., Grob, L.K., Heylen, H., Kaufmann, S., Kowalska, M., Kraemer, J., Malbrunot-Ettenauer, S., Neugart, R., Neyens, G., Nörtershäuser, W., Papuga, J., Sánchez, R., Yordanov, D.T., Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Nuclear Theory (nucl-th) ,nucl-th ,[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] ,Nuclear Theory ,Nuclear Physics - Theory ,ddc:550 ,FOS: Physical sciences ,Nuclear Physics - Experiment ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Präzisionsexperimente - Abteilung Blaum ,Nuclear Experiment (nucl-ex) ,nucl-ex ,Nuclear Experiment - Abstract
Collinear laser spectroscopy has been performed on the $^{79}_{30}$Zn$_{49}$ isotope at ISOLDE-CERN. The existence of a long-lived isomer with a few hundred milliseconds half-life was confirmed, and the nuclear spins and moments of the ground and isomeric states in $^{79}$Zn as well as the isomer shift were measured. From the observed hyperfine structures, spins $I = 9/2$ and $I = 1/2$ are firmly assigned to the ground and isomeric states. The magnetic moment $\mu$ ($^{79}$Zn) = $-$1.1866(10) $\mu_{\rm{N}}$, confirms the spin-parity $9/2^{+}$ with a $\nu g_{9/2}^{-1}$ shell-model configuration, in excellent agreement with the prediction from large scale shell-model theories. The magnetic moment $\mu$ ($^{79m}$Zn) = $-$1.0180(12) $\mu_{\rm{N}}$ supports a positive parity for the isomer, with a wave function dominated by a 2h-1p neutron excitation across the $N = 50$ shell gap. The large isomer shift reveals an increase of the intruder isomer mean square charge radius with respect to that of the ground state: $\delta \langle r^{2}_{c}\rangle^{79,79m}$ = +0.204(6) fm$^{2}$, providing first evidence of shape coexistence., Comment: 5 pages, 4 figures, 1 table, Accepeted by Phys. Rev. Lett. (2016)
- Published
- 2016
- Full Text
- View/download PDF
49. Combined high-resolution laser spectroscopy and nuclear decay spectroscopy for the study of the low-lying states in 206Fr, 202At, and 198Bi
- Author
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Lynch, K. M., Cocolios, T. E., Billowes, J., Bissell, M. L., Budinčević, I., Day Goodacre, T., De Groote, R. P., Farooq-Smith, G. J., Fedosseev, V. N., Flanagan, K. T., Franchoo, S., Garcia Ruiz, R. F., Heylen, H., Li, R., Marsh, B. A., Neyens, G., Rossel, R. E., Rothe, S., Stroke, H. H., Wendt, K. D. A., Wilkins, S. G., Yang, X., Institut de Physique Nucléaire d'Orsay (IPNO), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
- Subjects
Physics::Atomic and Molecular Clusters ,Nuclear Physics - Experiment ,Physics::Atomic Physics ,Physics::Chemical Physics ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment - Abstract
High-resolution laser spectroscopy was performed on $^{206}$Fr with the collinear resonance ionization spectroscopy (CRIS) experiment at CERN-ISOLDE. The hyperfine structure and isotope shift of the ground, first isomeric and second isomeric states were measured. The hyperfine components were unambiguously assigned to each nuclear state by means of laser-assisted nuclear decay spectroscopy. The branching ratios in the α decay of $^{206}$Fr and $^{202}$At were also measured for the first time with isomerically purified beams. The extracted hindrance factors allow determination of the spin of the ground, first isomeric, and second isomeric states in $^{202}$At and $^{198}$Bi.
- Published
- 2016
- Full Text
- View/download PDF
50. Probing the Ga31 ground-state properties in the region near Z=28 with high-resolution laser spectroscopy
- Author
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Farooq-Smith, G. J., primary, Vernon, A. R., additional, Billowes, J., additional, Binnersley, C. L., additional, Bissell, M. L., additional, Cocolios, T. E., additional, Day Goodacre, T., additional, de Groote, R. P., additional, Flanagan, K. T., additional, Franchoo, S., additional, Garcia Ruiz, R. F., additional, Gins, W., additional, Lynch, K. M., additional, Marsh, B. A., additional, Neyens, G., additional, Rothe, S., additional, Stroke, H. H., additional, Wilkins, S. G., additional, and Yang, X. F., additional
- Published
- 2017
- Full Text
- View/download PDF
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