Ruohong Li

Efficient extraction of uranium from seawater using a novel functionalized adsorbent synthesized with methylenebis (phosphonic dichloride) and polyethylenimine

Bo Deng, Xin Qiu, Haonan Huang, Ruohong Li et autres

Site identification of Li + in rutile TiO 2 and MgF 2 by the NMR of ion-implanted 8 Li and DFT

Signy L. Spencer, Ryan M. L. McFadden, Victoria L. Karner, Aris Chatzichristos et autres

Abstract We use implanted 8 Li + β -detected nuclear magnetic resonance ( β -NMR) measurements to “fingerprint” the Li + lattice sites in single crystals of rutile TiO 2 and MgF 2 via the quadrupolar splittings. Supplemented by density functional theory …

ca, us, hr, fr (code pays fourni par la source)

8 Li Spin-Lattice Relaxation in Magnetic High Entropy Oxides

W. Andrew MacFarlane, Ryan M. L. McFadden, Mario U. González-Rivas, John O. Ticknor et autres

Abstract We report β -detected nuclear magnetic resonance ( β NMR) measurements of the spin-lattice relaxation 1/ T 1 of 8 Li + implanted into polycrystalline samples of two magnetic high entropy oxides (HEOs): (Co x Cu x Mg x Ni x …

ca (code pays fourni par la source)

Laser resonance ionization spectroscopy of thorium

Ruohong Li, Y. Liu, D. W. Stracener, J. Lassen

Abstract High-lying Rydberg and autoionizing (AI) states of thorium (Th) have been studied via resonance laser ionization spectroscopy at both TRIUMF Canada’s particle accelerator center and Oak Ridge National Lab (ORNL). Multiple Rydberg series converging to the ionization potential (IP) were observed …

ca, us (code pays fourni par la source)

First evidence for the J$>$1 components of the pygmy dipole resonance in neutron-rich nuclei

Ruohong Li, Елена Литвинова, M.N. Harakeh, D. Verney et autres

Gamma ($γ$) decay shapes the synthesis of heavy elements in neutron-rich nuclear environments of neutron star mergers, supplying the Universe with heavy elements. The low-energy pygmy dipole resonance (PDR) influences nuclear reaction rates of the rapid nucleosynthesis through enhanced $γ$ transitions. However, …

fr (code pays fourni par la source)

Dynamics from the Surface to the Bulk in Ultrastable and Liquid-Cooled Oligomeric Glasses

Iain McKenzie, Victoria L. Karner, Ruohong Li, W. A. MacFarlane et autres

Ultrastable glasses (USGs) exhibit strikingly different properties from liquid-cooled normal glasses (NGs), yet their molecular dynamics remain poorly understood. Using β-detected NMR of implanted spin-polarized ^{8}Li^{+}, we directly track the depth and temperature dependence of the γ relaxation-phenyl ring twisting-in highly monodisperse …

ca (code pays fourni par la source)

Superconducting properties of thin film Nb 1 − x Ti x N studied via the NMR of implanted 8Li

Md Asaduzzaman, Ryan M. L. McFadden, Edward Thoeng, Yasmine Kalboussi et autres

Abstract We report measurements of the normal-state and superconducting properties of thin-film Nb 1 − x Ti x N using 8Li β-detected nuclear magnetic resonance (β-NMR). In these experiments, radioactive 8Li+ probes were implanted ∼21 nm below the surface of a Nb0.75Ti0.25N(91 …

ca, fr (code pays fourni par la source)

Laser Resonance Ionization Spectroscopy of Thorium

Ruohong Li, Y. Liu, D. W. Stracener, J. Lassen

High-lying Rydberg and autoionizing (AI) states of thorium (Th) have been studied via resonance laser ionization spectroscopy at both TRIUMF Canada's particle accelerator centre and Oak Ridge National Lab (ORNL). Multiple Rydberg series converging to the ionization potential (IP) were observed via …

Two-step laser resonant ionization spectroscopy of neutral chromium

R. Schulz, Ruohong Li, Julius Wessolek, Maryam Mostamand et autres

At TRIUMF’s off-line laser ion source test stand, stepwise resonant laser ionization spectroscopy of neutral chromium (Cr I) was carried out, to find an efficient ionization scheme suitable for titanium sapphire (Ti:Sa) laser systems. With the excitation to the three different intermediate …

ca, de (code pays fourni par la source)

RF phase effect on ion transmission in TRIUMF’s ion-guide laser ion source (IG-LIS)

Ruohong Li, Maryam Mostamand, J. Lassen

A phase-locked radio frequency quadrupole (RFQ) ion-guide laser ion source (IG-LIS) has been developed and tested offline at TRIUMF's laser ion source test stand and commissioned online at the isotope separator and accelerator facility. In this device, a master clock is used …

ca (code pays fourni par la source)

Collinear laser spectroscopy on neutron-rich actinium isotopes

Ruohong Li, A. Teigelhöfer, Jiguang Li, Jacek Bieroń et autres

High-resolution collinear laser spectroscopy of neutron-rich actinium has been performed at TRIUMF's isotope separator and accelerator facility ISAC. By probing the $7{s}^{2}\phantom{\rule{4pt}{0ex}}^{1}S_{0}\phantom{\rule{4pt}{0ex}}\ensuremath{\rightarrow}\phantom{\rule{4pt}{0ex}}6d7p\phantom{\rule{4pt}{0ex}}^{1}P_{1}$ ionic transition, the hyperfine structures and optical isotope shifts in $^{225,226,228,229}\mathrm{Ac}^{+}$ have been measured. This allows precise determinations of the …

ca, cn, pl, be, se (code pays fourni par la source)

Two-step laser resonant ionization spectroscopy of chromium

R. Schulz, Ruohong Li, Julius Wessolek, Maryam Mostamand et autres

At TRIUMF's off-line laser ion source test stand, stepwise resonant laser ionization spectroscopy of chromium (Cr) was carried out, to find an efficient ionization scheme suitable for titanium sapphire (Ti:Sa) laser systems. With three different first-excitation transitions, 357.971 nm, 359.451 nm, and …