Finding the ultra-narrow 3\!P2 → \, 3\!P0 electric quadrupole transition in Ni12+ ion for an optical clockThe Ni12+ ion features an electronic transition with a natural width of only 8 mHz, allowing for a highly stable optical clock. We predict that the energy of this strongly forbidden $3s2 3p4\,…Charles Cheung, Sergey G. Porsev, Dmytro Filin et al.·Feb 8, 2025SaveLearn
Theoretical determination of the ionization potentials of ScF, YF, LaF and AcFWe present a comprehensive theoretical study of the ionization potentials of the MF (M = Sc, Y, La, Ac) molecules using the state-of-the-art relativistic coupled cluster approach with single, double,…Aleksandra A. Kyuberis, Lukas F. Pasteka, Ephraim Eliav et al.·Feb 7, 2025SaveLearn
Precise charge state distribution of projectile ions through solid targetsThe charge state distribution (CSD) of the projectile ions through solid targets in the intermediate energy range (1 MeV/u < E < 4 MeV/u) has a major impact on the collision of the ion atom and…Manpreet Kaur, Sanjeev Kumar, T. Nandi·Feb 7, 2025SaveLearn
Experimental realization of a SU(3) color-orbit coupling in an ultracold gasSpin-orbit interaction couples the spin of a particle to its motion and leads to spin-induced transport phenomena such as spin-Hall effects and Chern insulators. In this work, we extend the concept…Chetan S. Madasu, Chirantan Mitra, Lucas Gabardos et al.·Feb 7, 2025SaveLearn
A large-momentum-transfer Raman atom interferometer without k-reversalWe present a Raman atom interferometer using large momentum transfer without reversing the direction of the effective wavevector (k-reversal). More specifically, we use a microwave π/2 pulse to…Guanchen Peng, Bryony Lanigan, R. Shah et al.·Feb 5, 2025SaveLearn
Attosecond Optical OrientationCircularly polarized light offers opportunities to probe symmetry-dependent properties of matter such as chirality and spin. Circular dichroism measurements typically require further intrinsic or…Lauren B Drescher, Nicola Mayer, Kylie Gannan et al.·Feb 5, 2025SaveLearn
Phenomenological rate formulas for over-barrier ionization of hydrogen and helium atoms in strong constant electric fieldsNonrelativistic over-barrier ionization (OBI) of atoms in strong electric fields is studied, focussing on hydrogen and helium as concrete examples. Our goal is, on the one hand, to develop an…S. Remme, A. B. Voitkiv, G. Pretzler et al.·Feb 4, 2025SaveLearn
Temperature-dependent radiative lifetime measurement of the 61g+(v=9,J=31) state of sodium moleculesWe report the measurement of radiative lifetimes of the 61g+(v=9,J=31) state of gas-phase molecular sodium using a high-resolution double-resonance spectroscopy. Measurements were done…Kshitiz Rai, Shakil Bin Kashem, Henry Pierce et al.·Feb 4, 2025SaveLearn
Theory of composite Ramsey sequences of radiofrequency pulses beyond the rotating wave approximationWe develop a theory of composite Ramsey sequences of rf pulses interacting with the Zeeman structure at the long-lived atomic level, beyond the rotating wave approximation. Such sequences are…V. I. Yudin, O. N. Prudnikov, A. V. Taichenachev et al.·Feb 4, 2025SaveLearn
Reply to Comment on "Revisiting the divergent multipole expansion of atom-surface interactions: Hydrogen and positronium, alpha-quartz, and physisorption" (arXiv:2501.14803)We present a Reply to the Comment by G. L. Klimchitskaya, arXiv:2501.14803 [physics.atom-ph]. It is shown that the criticism formulated in the Comment fails to appreciate recently obtained results…Ulrich D. Jentschura·Feb 4, 2025SaveLearn
Precision measurement of the last bound states in H2 and determination of the H + H scattering lengthThe binding energies of the five bound rotational levels J=0-4 in the highest vibrational level v=14 in the X1g+ ground electronic state of H2 were measured in a three-step…K. -F. Lai, W. Ubachs, M. Beyer·Feb 3, 2025SaveLearn
Revisiting self-seeding mechanism by generating vector ultraviolet N2+ lasingAn intense femtosecond laser pulse can generate ultraviolet air lasing, offering a promising remote light source. A long-standing hypothesis is whether it is seeded by a self-generated spectral…Jingsong Gao, Yang Wang, Jiahao Dong et al.·Feb 3, 2025SaveLearn
A new approach to include electron interaction effects in super transition array opacity theoryA method is presented for the improved calculation of super-shell partition functions which include the repulsive electron-electron interaction energy terms in the Boltzmann factor. Heretofore these…Daniel Aberg, Brian G. Wilson, Jean-Christophe Pain·Feb 3, 2025SaveLearn
Relativistic configuration-interaction and coupled-cluster calculations of Ir17+ transition energies and properties for optical clock applicationsThe transition energies and properties of the Ir17+ ion are calculated using the Kramers-restricted configuration-interaction (KRCI) and Fock-space coupled-cluster (FSCC) methods within the…H. X. Liu, Y. M. Yu, B. B. Suo et al.·Feb 3, 2025SaveLearn
Resonance nuclear excitation of the 229Th nucleus via electronic bridge process in Th~IIThe 8.4 eV transition in the 229Th nucleus is the basis for a high-precision nuclear clock with exceptional sensitivity to new physics effects. We have identified several cases in the Th+ ion…V. A. Dzuba, V. V. Flambaum·Feb 3, 2025SaveLearn
Lifetimes of the Metastable 6d\, 2D5/2 and 6d\, 2D3/2 States of Ra+We report lifetime measurements of the metastable 6d\, 2D5/2 and 6d\, 2D3/2 states of Ra+. The measured lifetimes, τ5 = 303.8(1.5) ms…Haoran Li, Huaxu Dan, Mingyu Fan et al.·Jan 31, 2025SaveLearn
L-shell Photoionisation Cross Sections in the S+, S2+, S3+ Isonuclear SequenceWe present absolute L-shell photoionisation cross sections for the S+, S2+, S3+ions. The cross sections were obtained using the monochromatised photon beam delivered by the SOLEIL synchrotron source…J. -P. Mosnier, E. T. Kennedy, D. Cubaynes et al.·Jan 30, 2025SaveLearn
Cs microcell optical reference at 459 nm with short-term frequency stability below 2 × 10-13We describe the short-term frequency stability characterization of external-cavity diode lasers stabilized onto the 6S1/2-7P1/2 transition of Cs atom at 459 nm, using a microfabricated…E. Klinger, C. M. Rivera-Aguilar, A. Mursa et al.·Jan 30, 2025SaveLearn
High-precision measurements of electric-dipole-transition amplitudes in excited states of 208Pb using Faraday rotation spectroscopyWe have completed measurements of two low-lying excited-state electric-dipole (E1) transition amplitudes in lead. Our measured reduced matrix elements of the (6s2 6p2)3P1 (6s2 6p7s)3P0…John H. Lacy, Abby C. Kinney, P. K. Majumder·Jan 30, 2025SaveLearn
Doppler-free spectroscopy of the Cs 6S1/2-7P3/2 atomic transition at 456 nm in a nanometric-thick vapor layerThe features of Doppler-free resonances detected by probing the 133Cs atom 6S1/2-7P3/2 transition at 456 nm in a nanometric-thick vapor layer are investigated. The matrix element of this…A. Sargsyan, E. Klinger, R. Boudot et al.·Jan 30, 2025SaveLearn
Multi-parameter study of two-axis Hanle magnetometry on the Cs D1 lineWe have studied experimentally and theoretically the impact of various parameters on the characteristics of signals from a two-axis Hanle magnetometer based on the Cs D1 transition illuminated by…Arturs Mozers, Antons Nikolajevs, Florian Gahbauer et al.·Jan 29, 2025SaveLearn
Ion-kinetic-energy sampling in a 22-pole trap using ring-electrode evaporationWe present an experimental method for the characterization of the kinetic energies of ions confined in a 22-pole radio frequency trap by inducing a small potential barrier using the surrounding ring…Miguel Jiménez-Redondo, Dieter Gerlich, Paola Caselli et al.·Jan 29, 2025SaveLearn
Dielectronic recombination studies on Fe2+Dielectronic recombination resonance strengths, energy-differential cross sections, and recombination rate coefficients are calculated fully relativistically for Fe2+ ions. The ground-state and…S. Singh, Z. Harman·Jan 28, 2025SaveLearn
Correlated electron dynamics with time-dependent quantum Monte Carlo: three-dimensional heliumHere the recently proposed time-dependent quantum Monte Carlo method is applied to three dimensional para- and ortho-helium atoms subjected to an external electromagnetic field with amplitude…Ivan P. Christov·Jan 28, 2025SaveLearn
Evaporative cooling by pulse width modulation (PWM) of optical dipole trapsWe introduce a method for cooling atoms in an optical dipole trap using pulse-width modulation (PWM) technique, without reducing the laser power of the dipole trap. The PWM technique involves digital…S. Sagar Maurya, Joel M. Sunil, Monu Bhartiya et al.·Jan 27, 2025SaveLearn