Article
Physics, Nuclear
T. Day Goodacre, A. Afanasjev, A. E. Barzakh, L. Nies, B. A. Marsh, S. Sels, U. C. Perera, P. Ring, F. Wienholtz, A. N. Andreyev, P. Van Duppen, N. A. Althubiti, B. Andel, D. Atanasov, R. S. Augusto, J. Billowes, K. Blaum, T. E. Cocolios, J. G. Cubiss, G. J. Farooq-Smith, D. Fedorov, V. N. Fedosseev, K. T. Flanagan, L. P. Gaffney, L. Ghys, A. Gottberg, M. Huyse, S. Kreim, P. Kunz, D. Lunney, K. M. Lynch, V Manea, Y. Martinez Palenzuela, T. M. Medonca, P. L. Molkanov, M. Mougeot, J. P. Ramos, M. Rosenbusch, R. E. Rossel, S. Rothe, L. Schweikhard, M. D. Seliverstov, P. Spagnoletti, C. Van Beveren, M. Veinhard, E. Verstraelen, A. Welker, K. Wendt, R. N. Wolf, A. Zadvornaya, K. Zuber
Summary: By combining laser spectroscopy in a Versatile Arc Discharge and Laser Ion Source (VADLIS) with Penning-trap mass spectrometry at the CERN-ISOLDE facility, this study investigated neutron-rich mercury isotopes near the N = 126 shell closure. The odd-even staggering of mean square charge radii and the kink at N = 126 were analyzed within the covariant density functional theory (CDFT) framework, revealing their dependence on the particle-hole channel. The results suggest that the observed features are predominantly influenced by the occupation of specific orbitals and their relative energies.
Article
Physics, Multidisciplinary
Felix Sommer, Kristian Konig, Dominic M. Rossi, Nathan Everett, David Garand, Ruben P. de Groote, Jason D. Holt, Phillip Imgram, Anthony Incorvati, Colton Kalman, Andrew Klose, Jeremy Lantis, Yuan Liu, Andrew J. Miller, Kei Minamisono, Takayuki Miyagi, Witold Nazarewicz, Wilfried Noertershaeuser, Skyy V. Pineda, Robert Powel, Paul-Gerhard Reinhard, Laura Renth, Elisa Romero-Romero, Robert Roth, Achim Schwenk, Chandana Sumithrarachchi, Andrea Teigelhofer
Summary: Nuclear charge radii of Ni-55;56 were measured using collinear laser spectroscopy, and it was found that the trend of charge radii across shell closures is similar to that of calcium. The study also revealed the impact of M1 excitations between spin-orbit partners.
PHYSICAL REVIEW LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Zbigniew Kisiel, Krzysztof Habdas
Summary: This paper discusses methods for determining the molecular electric dipole moment and presents some solutions. The electric dipole moments of three molecules were experimentally determined and compared with quantum chemistry calculations. It was found that the vibrationally averaged dipole moments were closest to the observation.
Article
Physics, Nuclear
S. Lechner, Z. Y. Xu, M. L. Bissell, K. Blaum, B. Cheal, G. De Gregorio, C. S. Devlin, R. F. Garcia Ruiz, A. Gargano, H. Heylen, P. Imgram, A. Kanellakopoulos, A. Koszorus, S. Malbrunot-Ettenauer, R. Neugart, G. Neyens, W. Noertershaeuser, P. Plattner, L. Rodriguez, X. F. Yang, D. T. Yordanov
Summary: The single-particle behavior of Sb-133 nuclei is highly sensitive to the splitting of spin-orbit partners, while quadrupole moments of N = 82 isotones are insensitive to cross-shell excitations. The isomer in Sb-134 can be accurately described using the additivity rule for magnetic moments.
Article
Instruments & Instrumentation
P. Zhang, H. R. Hu, X. F. Yang, S. J. Wang, S. W. Bai, Y. C. Liu, Y. S. Liu, Y. F. Guo, Z. Y. Lin, Z. Yan, Z. Y. Du, W. C. Mei, X. Y. Ni, H. W. Li, Q. T. Li, Y. L. Ye, C. Y. He, J. Yang, Z. Y. Liu
Summary: A new collinear resonance ionisation spectroscopy setup has been developed for studying nuclear properties of exotic isotopes. Based on a recently-commissioned collinear laser spectroscopy, this setup can potentially measure hyperfine structure spectra of the studied isotopes using laser-induced fluorescence and laser resonance ionisation methods. This paper presents the latest technique development, progress on the test of the vacuum system and ion beam transportation, as well as the near-term offline experimental plans.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Physics, Multidisciplinary
G. Sanamyan, B. M. Roberts, J. S. M. Ginges
Summary: The finite distribution of the nuclear magnetic moment across the nucleus contributes to the hyperfine structure as the Bohr-Weisskopf effect. By combining historical muonic-atom measurements with muonic-atom and atomic many-body calculations, we have obtained an empirical value of -0.24o18 thorn % for this effect in the ground and excited s states of atomic 133Cs. These results not only allow for testing cesium atomic wave functions in the nuclear region at an unprecedented 0.2% level but also play a crucial role in the development of precision atomic many-body methods, which is important for increasing the discovery potential of precision atomic searches for new physics, particularly in the case of atomic parity violation in cesium.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Gleb Penyazkov, Sergey D. Prosnyak, Anatoly E. Barzakh, Leonid V. Skripnikov
Summary: The electronic factors for field and mass isotope shifts in various transitions of neutral thallium were calculated using the high-order relativistic coupled cluster approach. These factors were then used to reinterpret previous experimental isotope shift measurements and determine charge radii of different thallium isotopes. Theoretical and experimental results demonstrated good agreement in certain transitions, and it was shown that the specific mass shift factor in a particular transition is significant. The achieved accuracy in estimating charge radii uncertainties allows for a more reliable comparison of charge radii trends in the lead region.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
B. M. Rebeiro, S. Triambak, P. E. Garrett, G. C. Ball, B. A. Brown, J. Menendez, B. Romeo, P. Adsley, B. G. Lenardo, R. Lindsay, V. Bildstein, C. Burbadge, R. Coleman, A. Diaz Varela, R. Dubey, T. Faestermann, R. Hertenberger, M. Kamil, K. G. Leach, C. Natzke, J. C. Nzobadila Ondze, A. Radich, E. Rand, H. -F. Wirth
Summary: In this study, we used the 138Ba(d, alpha) reaction to investigate the states in Cs-136 with energies up to approximately 2.5 MeV. Our focus was on previously unobserved states below the first 1+ level, which are significant for the detection of solar neutrinos and fermionic dark matter events in xenon-based experiments. We discovered candidate metastable states in Cs-136, which could be used for real-time detection of these events with high background suppression.
PHYSICAL REVIEW LETTERS
(2023)
Article
Instruments & Instrumentation
S. J. Wang, X. F. Yang, S. W. Bai, Y. C. Liu, P. Zhang, Y. S. Liu, H. R. Hu, H. W. Li, B. Tang, B. Q. Cui, C. Y. He, X. Ma, Q. T. Li, J. H. Chen, K. Ma, L. S. Yang, Z. Y. Hu, W. L. Pu, Y. Chen, Y. F. Guo, Z. Y. Du, Z. Yan, F. L. Liu, H. R. Wang, G. Q. Yang, Y. L. Ye, B. Guo
Summary: We have constructed a collinear laser spectroscopy system at the Beijing Radioactive Ion-beam Facility (BRIF) to study the nuclear properties of unstable nuclei. In the first on-line commissioning experiment, we reproduced the hyperfine structure spectra of stable and unstable isotopes and obtained magnetic dipole hyperfine parameters and isotope shift values consistent with literature. This experiment demonstrates the functionality of the CLS system and opens up new opportunities for laser spectroscopy measurement of unstable isotopes in China's radioactive ion beam facilities.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Review
Physics, Nuclear
X. F. Yang, S. J. Wang, S. G. Wilkins, R. F. Garcia Ruiz
Summary: Investigation into the properties and structure of unstable nuclei far from stability is a key avenue of research in modern nuclear physics. Laser spectroscopy techniques have played a significant role in understanding exotic nuclei and have contributed to the development of nuclear theory. These techniques are widely employed at radioactive ion beam facilities worldwide and have recently been applied to molecules containing short-lived nuclei.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2023)
Article
Optics
M. Faisal, I Siddiqui, L. Windholz
Summary: Laser spectroscopy and optogalvanic detection were used to investigate previously unclassified or unknown atomic lanthanum (La I) spectral lines, resulting in the discovery of seven new energy levels and one known level with incorrect angular momentum. In total, 53 spectral lines were classified as transitions of these eight levels.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Astronomy & Astrophysics
S. W. Bai, A. Koszorus, B. S. Hu, X. F. Yang, J. Billowes, C. L. Binnersley, M. L. Bissell, K. Blaum, P. Campbell, B. Cheal, T. E. Cocolios, R. P. de Groote, C. S. Devlin, K. T. Flanagan, R. F. Garcia Ruiz, H. Heylen, J. D. Holt, A. Kanellakopoulos, J. Kraemer, V. Lagaki, B. Maass, S. Malbrunot-Ettenauer, T. Miyagi, R. Neugart, G. Neyens, W. Noertershaeuser, L. V. Rodriguez, F. Sommer, A. R. Vernon, S. J. Wang, X. B. Wang, S. G. Wilkins, Z. Y. Xu, C. X. Yuan
Summary: The electric quadrupole moment of Sc-49 was measured with improved precision, and the electromagnetic moments of Z = 21 and N = 28 isotopes were investigated to study single-particle behavior and nucleon-nucleon correlations. The experimental data were interpreted using different calculation methods, and they provide an important benchmark for further theoretical developments.
Article
Optics
Mohammad Haidar, Vladimir I. Korobov, Laurent Hilico, Jean -Philippe Karr
Summary: This study focuses on higher-order corrections to the spin-orbit and spin-spin tensor interactions in hydrogen molecular ions. The authors derive the m alpha 7ln(alpha)-order radiative correction using the NRQED framework. Complete numerical calculations, including the m alpha 6-order relativistic correction, are presented for the case of H-2(+). The theoretical uncertainty is significantly reduced compared to the Breit-Pauli level, to a few ppm. The results are also compared with available rf spectroscopy data.
Article
Instruments & Instrumentation
Jekabs Romans, Anjali Ajayakumar, Martial Authier, Frederic Boumard, Lucia Caceres, Jean-Francois Cam, Arno Claessens, Samuel Damoy, Pierre Delahaye, Philippe Desrues, Wenling Dong, Antoine Drouart, Patricia Duchesne, Rafael Ferrer, Xavier Flechard, Serge Franchoo, Patrice Gangnant, Sarina Geldhof, Ruben P. de Groote, Nathalie Lecesne, Renan Leroy, Julien Lory, Franck Lutton, Vladimir Manea, Yvan Merrer, Iain Moore, Alejandro Ortiz-Cortes, Benoit Osmond, Julien Piot, Olivier Pochon, Sebastian Raeder, Antoine de Roubin, Herve Savajols, Simon Sels, Dominik Studer, Emil Traykov, Juha Uusitalo, Christophe Vandamme, Marine Vandebrouck, Paul Van den Bergh, Piet Van Duppen, Klaus Wendt
Summary: In this paper, the first high-resolution laser spectroscopy results obtained at the GISELE laser laboratory of the GANIL-SPIRAL2 facility are presented for the first experiments with the S3-Low Energy Branch. Neutron-deficient radioactive isotopes of erbium and tin are studied, and the measured isotope-shift and hyperfine structure data for stable isotopes of these elements are presented. The laser setup is benchmarked using the atomic transitions of 4f126s2 3H6-* 4f12(3H)6s6p J = 5 (415 nm) for erbium isotopes and 5s25p2(3P0)-* 5s25p6s(3P1) (286.4 nm) for tin isotopes. Additionally, new isotope-shift data and corresponding field-shift F812 and mass-shift M812 factors are obtained for the 5s25p6s(3P1)-* 5s25p6p(3P2) (811.6 nm) atomic transition of tin isotopes.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Astronomy & Astrophysics
P. F. Bernath, R. Dodangodage, J. Lievin
Summary: This study analyzes the characteristics of LaO bands in the spectra of cool S-type stars and calculates spectroscopic constants and radiative lifetimes for the A(2)pi state. A line list for the LaO bands is provided, which can be used to determine the abundance of LaO in stars.
ASTROPHYSICAL JOURNAL
(2023)
Article
Physics, Multidisciplinary
S. Malbrunot-Ettenauer, S. Kaufmann, S. Bacca, C. Barbieri, J. Billowes, M. L. Bissell, K. Blaum, B. Cheal, T. Duguet, R. F. Garcia Ruiz, W. Gins, C. Gorges, G. Hagen, H. Heylen, J. D. Holt, G. R. Jansen, A. Kanellakopoulos, M. Kortelainen, T. Miyagi, P. Navratil, W. Nazarewicz, R. Neugart, G. Neyens, W. Noertershauser, S. J. Novario, T. Papenbrock, T. Ratajczyk, P. G. Reinhard, L. Rodriguez, R. Sanchez, S. Sailer, A. Schwenk, J. Simonis, V Soma, S. R. Stroberg, L. Wehner, C. Wraith, L. Xie, Z. Y. Xu, X. F. Yang, D. T. Yordanov
Summary: Collinear laser spectroscopy was used to study the nuclear charge radii of nickel isotopes. Three ab initio methods were compared, with agreement in differential radii but only the NNLOsat method showing consistent absolute radii. The Skyrme functional SV-min was found to match experimental results more closely in nuclear density functional theory.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
S. Geldhof, M. Kortelainen, O. Beliuskina, P. Campbell, L. Caceres, L. Canete, B. Cheal, K. Chrysalidis, C. S. Devlin, R. P. de Groote, A. de Roubin, T. Eronen, Z. Ge, W. Gins, A. Koszorus, S. Kujanpaa, D. Nesterenko, A. Ortiz-Cortes, I. Pohjalainen, I. D. Moore, A. Raggio, M. Reponen, J. Romero, F. Sommer
Summary: This study presents a detailed analysis of the relationship between nuclear quadrupole deformation and nuclear size, finding a clear link in palladium isotopes. By measuring and calculating, it is concluded that the strength of pairing correlations has an impact on charge radii and odd-even staggering.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
S. W. Bai, A. Koszorus, B. S. Hu, X. F. Yang, J. Billowes, C. L. Binnersley, M. L. Bissell, K. Blaum, P. Campbell, B. Cheal, T. E. Cocolios, R. P. de Groote, C. S. Devlin, K. T. Flanagan, R. F. Garcia Ruiz, H. Heylen, J. D. Holt, A. Kanellakopoulos, J. Kraemer, V. Lagaki, B. Maass, S. Malbrunot-Ettenauer, T. Miyagi, R. Neugart, G. Neyens, W. Noertershaeuser, L. V. Rodriguez, F. Sommer, A. R. Vernon, S. J. Wang, X. B. Wang, S. G. Wilkins, Z. Y. Xu, C. X. Yuan
Summary: The electric quadrupole moment of Sc-49 was measured with improved precision, and the electromagnetic moments of Z = 21 and N = 28 isotopes were investigated to study single-particle behavior and nucleon-nucleon correlations. The experimental data were interpreted using different calculation methods, and they provide an important benchmark for further theoretical developments.
Article
Multidisciplinary Sciences
A. R. Vernon, R. F. Garcia Ruiz, T. Miyagi, C. L. Binnersley, J. Billowes, M. L. Bissell, J. Bonnard, T. E. Cocolios, J. Dobaczewski, G. J. Farooq-Smith, K. T. Flanagan, G. Georgiev, W. Gins, R. P. de Groote, R. Heinke, J. D. Holt, J. Hustings, A. Koszorus, D. Leimbach, K. M. Lynch, G. Neyens, S. R. Stroberg, S. G. Wilkins, X. F. Yang, D. T. Yordanov
Summary: This article discusses the phenomenon where nuclear properties are governed by a single unpaired nucleon around specific numbers of nucleons, with indium isotopes being a textbook example of this. Precision laser spectroscopy measurements revealed an abrupt change in the dipole moment at N = 82, indicating that the single-particle picture dominates at this neutron magic number, but not for previously studied isotopes.
Article
Physics, Multidisciplinary
Felix Sommer, Kristian Konig, Dominic M. Rossi, Nathan Everett, David Garand, Ruben P. de Groote, Jason D. Holt, Phillip Imgram, Anthony Incorvati, Colton Kalman, Andrew Klose, Jeremy Lantis, Yuan Liu, Andrew J. Miller, Kei Minamisono, Takayuki Miyagi, Witold Nazarewicz, Wilfried Noertershaeuser, Skyy V. Pineda, Robert Powel, Paul-Gerhard Reinhard, Laura Renth, Elisa Romero-Romero, Robert Roth, Achim Schwenk, Chandana Sumithrarachchi, Andrea Teigelhofer
Summary: Nuclear charge radii of Ni-55;56 were measured using collinear laser spectroscopy, and it was found that the trend of charge radii across shell closures is similar to that of calcium. The study also revealed the impact of M1 excitations between spin-orbit partners.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Atomic, Molecular & Chemical
Simon Rausch, Max Horst, Zoran Andelkovic, Svetlana Fedotova, Wolfgang Geithner, Frank Herfurth, Dennis Neidherr, Wilfried Noertershaeuser, Nils Stallkamp, Sergiy Trotsenko, Gleb Vorobyev
Summary: Highly charged heavy ions at rest offer precise measurement opportunities, and GSI is capable of delivering ions up to U92+. To achieve ultimate precision, the ions need to be decelerated, and HITRAP cooling trap utilizes electron cooling to reduce the energy spread. The trap's commissioning process uses Ar16+ ions to analyze the stored ion signals and observe properties.
Article
Physics, Atomic, Molecular & Chemical
Konstantin Mohr, Axel Buss, Zoran Andelkovic, Volker Hannen, Max Horst, Phillip Imgram, Kristian Koenig, Bernhard Maass, Wilfried Noertershaeuser, Simon Rausch, Rodolfo Sanchez, Christian Weinheimer
Summary: Collinear laser spectroscopy was performed on helium-like B-11(3+) ions in the 1s2s(3)S(1)-> 1s2p(3)P(0,2) transitions using the HITRAP beamline at the GSI Helmholtz Centre. The results yielded consistent measurements with previous studies, indicating that the metastable state in He-like ions is sufficiently populated for collinear laser spectroscopy. This experiment serves as a pilot study for a series of measurements to be conducted on light helium-like ions at TU Darmstadt's dedicated collinear laser spectroscopy setup.
Article
Physics, Atomic, Molecular & Chemical
Ken Ueberholz, Lars Bozyk, Michael Bussmann, Noah Eizenhoefer, Volker Hannen, Max Horst, Daniel Kiefer, Nils Kiefer, Sebastian Klammes, Thomas Kuehl, Benedikt Langfeld, Markus Loeser, Xinwen Ma, Wilfried Noertershaeuser, Rodolfo Sanchez, Ulrich Schramm, Mathias Siebold, Peter Spiller, Markus Steck, Thomas Stoehlker, Thomas Walther, Hanbing Wang, Christian Weinheimer, Weiqiang Wen, Danyal Winters
Summary: An improved moveable in vacuo XUV fluorescence detection system was used to laser cool bunched relativistic carbon ions at the Experimental Storage Ring (ESR) in Germany. The fluorescence emitted from the ions, after laser excitation, strongly depends on the position of the detector and the delay between ion bunches and laser pulses. The fluorescence information can be combined with the ions' revolution frequencies, allowing for future laser cooling experiments at highly relativistic energies and high intensities of ion beams.
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
