Article
Physics, Multidisciplinary
Jonas Tauch, Saba Z. Hassan, Markus Noetzold, Eric S. Endres, Roland Wester, Matthias Weidemueller
Summary: The study of cold and controlled molecular ions is important for various applications, and the commonly used anion cooling technique is limited by the temperature of the cryogenic cooling medium. This study demonstrates the evaporative cooling of anions using a laser beam with high photon energies, resulting in a significant increase in the phase-space density of the ions. This technique can cool any anionic species below liquid helium temperature, pushing the frontiers of anion cooling below current temperature regimes.
Article
Nanoscience & Nanotechnology
Weiliang Jin, Wei Li, Chinmay Khandekar, Meir Orenstein, Shanhui Fan
Summary: In this article, a method of using solid-state laser cooling to solve the thermal management issue of lightsails is proposed. Experiment results show that using a lightsail doped with ytterbium ions can achieve a cooling rate higher than that of blackbody thermal emission and shorten the distance required to accelerate to relativistic speed. However, the performance of this method is limited by the bandwidth of the laser cooling dopant for target velocities at room temperature.
Article
Multidisciplinary Sciences
M. V. Suryanarayana
Summary: A three-step photoionization process for the laser isotope separation of Ra-223 has been theoretically studied. The effect of various factors on the separation process has been examined, and the optimal system parameters for Ra-223 separation have been determined. The possibility of producing Ra-223 isotope with high purity and a high production rate has been demonstrated. This is the first-ever study on laser isotope separation of Radium isotopes.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
C. J. Baker, W. Bertsche, A. Capra, C. Carruth, C. L. Cesar, M. Charlton, A. Christensen, R. Collister, A. Cridland Mathad, S. Eriksson, A. Evans, N. Evetts, J. Fajans, T. Friesen, M. C. Fujiwara, D. R. Gill, P. Grandemange, P. Granum, J. S. Hangst, W. N. Hardy, M. E. Hayden, D. Hodgkinson, E. Hunter, C. A. Isaac, M. A. Johnson, J. M. Jones, S. A. Jones, S. Jonsell, A. Khramov, P. Knapp, L. Kurchaninov, N. Madsen, D. Maxwell, J. T. K. McKenna, S. Menary, J. M. Michan, T. Momose, P. S. Mullan, J. J. Munich, K. Olchanski, A. Olin, J. Peszka, A. Powell, P. Pusa, C. O. Rasmussen, F. Robicheaux, R. L. Sacramento, M. Sameed, E. Sarid, D. M. Silveira, D. M. Starko, C. So, G. Stutter, T. D. Tharp, A. Thibeault, R. I. Thompson, D. P. van der Werf, J. S. Wurtele
Summary: Laser cooling, a widely-used technique in various fields, has now been successfully applied to anti-hydrogen atoms, leading to significant advancements in antimatter research. By using pulsed, narrow-linewidth laser radiation, researchers were able to Doppler-cool a sample of magnetically trapped anti-hydrogen, demonstrating the ability to manipulate the motion of anti-atoms with laser light and opening up groundbreaking opportunities for future experiments.
Article
Chemistry, Physical
Richard Karl, Yanning Yin, Stefan Willitsch
Summary: Hybrid traps, which combine different types of external fields, have become important tools for studying interactions between neutral particles and ions at low temperatures. This study uses molecular-dynamics simulations to investigate the effect of a strongly inhomogeneous magnetic field on the trapping and laser cooling of a single Ca+ ion in a radiofrequency trap. The results show that laser cooling is still effective despite the ion experiencing different magnetic field strengths and directions along its trajectory. Offsettting the centers of the two traps creates a linear magnetic-field gradient, requiring multiple lasers to address the resulting Zeeman splittings for efficient cooling.
Article
Physics, Multidisciplinary
Haowei Xu, Guoqing Wang, Changhao Li, Hua Wang, Hao Tang, Ariel Rebekah Barr, Paola Cappellaro, Ju Li
Summary: The initialization of nuclear spin to its ground state is challenging due to its small energy scale compared with thermal energy, even at cryogenic temperature. In this Letter, an optonuclear quadrupolar effect is proposed, where two-color optical photons can efficiently interact with nuclear spins. Leveraging such an optical interface, nuclear magnons, the collective excitations of nuclear spin ensemble, can be cooled down optically, which could facilitate the application of nuclear spins in quantum information science.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Boxing Zhu, James N. Bull, MingChao Ji, Henning Zettergren, Mark H. Stockett
Summary: This study measured the unimolecular dissociation and infrared radiative cooling rates of cationic 1-hydroxypyrene and 1-bromopyrene using a cryogenic electrostatic ion beam storage ring. A numerical approach was developed to analyze the time dependence of the dissociation rate and determine the absolute scaling of the radiative cooling rate coefficient. The results showed that radiative cooling competes with dissociation below critical total vibrational energies, which has important implications for astrochemical models and energy dissipation.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Review
Physics, Multidisciplinary
Florian Schreck, Klaasjan van Druten
Summary: Laser cooling is a crucial initial step for achieving Bose-Einstein condensation and quantum degeneracy in atomic gases, bringing them close to absolute zero. Ongoing development in laser cooling methods has enabled more elements to reach quantum degeneracy, leading to new experimental opportunities. Improved techniques like reaching Bose-Einstein condensation purely through laser cooling and continuous condensation are opening up new avenues for creating quantum gases.
Editorial Material
Physics, Multidisciplinary
Rohan D. Glover
Summary: Atom trap trace analysis is a powerful technique for detecting trace radioisotopes of noble gases, with the potential to be extended to other metal isotopes demonstrated by its successful application to a calcium isotope.
Article
Physics, Multidisciplinary
Wenbing Li, Sebastian Wolf, Lukas Klein, Dmitry Budker, Christoph E. Duellmann, Ferdinand Schmidt-Kaler
Summary: We demonstrate the implementation of three-dimensional polarization gradient cooling (PGC) for trapped ions. The cooling method is robust against an elevated phonon occupation number and works continuously in different cooling regimes. However, the performance of PGC strongly depends on residual micromotion and the spectral impurity of the laser field.
NEW JOURNAL OF PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Aohan Hu, Justin J. Wilson
Summary: This article provides an overview of recent advances in the development of ligands for large radiometal chelation in nuclear medicine. It discusses the coordination chemistry, radiolabeling properties, and covalent conjugation to biological targeting vectors of ligands such as macropa and macrodipa. The article also highlights the importance of ligand design for novel emerging radiometal ions with unusual coordination chemistry properties.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Optics
Alexander Kato, Andrei Nomerotski, Boris B. Blinov
Summary: We propose and demonstrate a method for Doppler cooling trapped-ion crystals with large and uneven distribution of micromotion amplitudes. The technique uses synchronized pulses of Doppler cooling light with the trap rf to selectively target ions near a node in their velocity, resulting in more uniform cooling across the crystal using a single tone of cooling light. We present a theoretical framework that describes the practicality of this technique and provide a simple experimental demonstration.
Article
Optics
Ye Zhang, Qixin Liu, Xiaohu Fu, Jianfang Sun, Zhen Xu, Yuzhu Wang
Summary: The developed deep-ultraviolet laser for laser cooling of mercury atoms demonstrates high power stability and low noise level, suitable for use in magneto-optical traps and optical lattice clocks.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Applied
Qishan Zheng, Yao Zhang, Liangliang Yin, Yuxin Qian, Yanqin Ji
Summary: A cost-effective method using liquid scintillation counting was developed to simultaneously determine the radioactivity of 226Ra and 228Ra in food samples. The method showed good accuracy and detectability in food samples.
Article
Chemistry, Physical
Taylor N. Lewis, Chen Wang, John R. Daniel, Madhav Dhital, Christopher J. Bardeen, Boerge Hemmerling
Summary: Research indicates that pulsed-laser ablation of stable, non-toxic mixtures of aluminum with alkali or alkaline earth chlorides can provide a reliable source of cold AlCl molecules. The chemical identity of XCln and the Al : XCln molar ratio affect the yield of AlCl, while the non-equilibrium recombination process limits the production of AlCl.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Xueping Long, Scarlett S. Yu, Andrew M. Jayich, Wesley C. Campbell
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Mohit Verma, Andrew M. Jayich, Amar C. Vutha
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
M. Fan, C. A. Holliman, X. Shi, H. Zhang, M. W. Straus, X. Li, S. W. Buechele, A. M. Jayich
Summary: A novel all-optical mass spectrometry technique has been introduced for identifying trapped ions using laser-cooled ions with high resolution in a short time. This method was successfully applied to identify cold, trapped RaOH+ and RaOCH3+ ions, which are sensitive to time and parity violations. The nondestructive nature and high speed of this technique make it promising for identifying molecular ions prior to optical spectroscopy and studying chemical reactions in ion traps.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Nitesh Chauhan, Andrei Isichenko, Kaikai Liu, Jiawei Wang, Qiancheng Zhao, Ryan O. Behunin, Peter T. Rakich, Andrew M. Jayich, C. Fertig, C. W. Hoyt, Daniel J. Blumenthal
Summary: The study demonstrates highly coherent emission of visible light lasers, providing important tools and technological support for research in atomic, molecular, and optical physics.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
C. A. Holliman, M. Fan, A. Contractor, S. M. Brewer, A. M. Jayich
Summary: We report the first operation of a Ra+ optical clock, demonstrating its performance in terms of frequency stability and systematic uncertainty. The clock allows for the measurement of the ratio of Lande ' g-factors and can improve limits on the time variation of the fine structure constant in optical frequency comparisons. Additionally, the clock has features that make it suitable for portable optical clock applications.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
M. Fan, C. A. Holliman, A. Contractor, C. Zhang, S. F. Gebretsadken, A. M. Jayich
Summary: We measured the lifetime of the radium ion's 7p(2)P(3/2) state and found it to be τ = 4.78(3) ns. The measured lifetime is consistent with theoretical calculations and will provide valuable information for determining the differential scalar polarizability of the narrow linewidth 7s S-2(1/2) -> (6)d(2)D(5/2) optical clock transition.
Article
Optics
C. A. Holliman, M. Fan, A. Contractor, M. W. Straus, A. M. Jayich
Article
Optics
C. A. Holliman, M. Fan, A. M. Jayich
Article
Optics
M. Fan, C. A. Holliman, S. G. Porsev, M. S. Safronova, A. M. Jayich
