23,911 research outputs found
The charge transfer and ion formation in liquid Li-Tl alloys
Full text linkThe 7Li NMR Knight shift, K, and the spin-lattice relaxation time, T1, were measured for liquid Li–Tl alloys. The K decreases rapidly with the addition of Tl up to 20 at.% Tl. In the concentration from 20 to 50 at.% Tl, the K decreases only slightly and the K of 50 at.% Tl is 60% of K for the pure liquid Li. Such a decrease of K is considered as an indication for the strong charge transfer from Li to Tl. These tendencies are similar to those from previous studies for liquid Li–Ga and Li–In alloys. However, beyond 50 at.% Tl, the K increases and reaches to an almost constant value (70% of K for the pure liquid Li). Such a back donation of charge is absent for liquid Li–Ga and Li–In alloys. It is considered that the tendency of the formation of ionic structural unit for liquid Li–Tl alloys is slightly weaker compared with the cases of liquid Li–Ga and Li–In alloys. The T1 is also discussed with the relation to the Knight shift and the electronic properties
Study of the properties of the tl 4,5 and 6 peaks in the \'LI\'f \'MG\'
Full text linkEstudo das propriedades dos picos tl 4,5 e 6 no \'LI\'f \'MG\'Study of the properties of the tl 4,5 and 6 peaks in the \'LI\'f \'MG\
Measurement of mass attenuation coefficients by Si(Li), NaI(Tl) and Cd(Tl) detectors
No full textMass attenuation coefficients of the some elements were
determined for two photon energies using different three detectors.
The samples were irradiated using 10 mCi Cd-109 and 100 mCi
Am-241 radioactive point sources. The photons were separately
counted by Si(Li), NaI(Tl) and Cd(Tl) detectors. It was observed
that the mass attenuation coefficient decreases with increasing
energy and increases with increasing atomic number. The
measured values are compared with the theoretical ones calculated
using WinXcom program
Ripeacma acuminiptera Wang & Li 1999
No full textRipeacma acuminiptera Wang & Li, 1999 Ripeacma acuminiptera Wang & Li, 1999: 58. TL: China (Henan). TD: NKU. Distribution. China (Chongqing, Fujian, Gansu, Guizhou, Henan, Hubei, Tianjin, Zhejiang). Ripeacma angusta Wang & Zheng, 1996 Ripeacma angusta Wang & Zheng, 1996: 31. TL: China (Shaanxi). TD: NKU. Distribution. China (Shaanxi). Ripeacma angustizonalis Wang, sp. nov. Distribution. China (Guangdong, Guangxi, Hainan). Ripeacma bicruris Wang & Li, 2003 Ripeacma bicruris Wang & Li, 2003: 72. TL: China (Guizhou, Hubei). TD: NKU. Distribution. China (Guizhou, Hubei).Published as part of Li, Suran & Wang, Shuxia, 2017, Description of six new species of the genus Ripeacma (Lepidoptera: Oecophoridae) from China, with a checklist of the world species, pp. 270-284 in Zootaxa 4268 (2) on page 281, DOI: 10.11646/zootaxa.4268.2.6, http://zenodo.org/record/58023
An exploration of Li-ion cell relaxation using EIS
Full text linkThis paper describes a systematic study of the effect of cell relaxation after a charge or discharge event. The EIS technique was used to investigate how the properties of the cells changed with time after charge or discharge up to a maximum of 15 hours. It was found that different chemistries show different relaxation rates and frequency dependence of Ro and Rd. The cells still showed a relaxation at 15 hours after a charge/discharge event. A suggested compromise of measurement accuracy and test length is to measure the properties of cells 4 hours after a charge/discharge event
Investigation on Li (i = l, β, and γ)–to-Lα X-ray Intensity Ratios of Tl in Thallium Compounds
No full textThe Li(i = l,β, and γ)–to-Lα X-ray intensity ratios of Tl in some thalliumcompounds were measured by EDXRF spectrometer. These compounds were excited by 59.5 keV gamma-rays froma 241Am annular radioactive source. L X-rays emitted by thecompounds were counted using an Ultra-LEGe detector with a resolution of 150 eVat 5.9 keV. Li–to-Lα X-ray intensity ratios of Tl in these compoundsare compared with that of the pure Tl calculated theoretically. While the values of Ll/Lαand Lγ/Lα intensityratios are compatible with the theoretically calculated value, thevalues of Lβ/Lα intensity ratios have differences
Monovalent metal phenylphosphonates and phenylarsonates: Single crystal X-ray structures of A(HO3PPh)(H2O3PPh) (A = K, Rb, Cs, Tl) and Na(HO3AsPh)(H2O3AsPh) and methylamine intercalation of A(HO3PPh)(H2O3PPh) (A = Li, Na, K, Tl)
No full textSingle crystal X-ray structures of known A(HO3PPh)(H2O3PPh) (A = K, Rb, Cs, Tl) phenylphosphonates and sodium phenylarsonate, Na(HO3AsPh)(H2O3AsPh) have been determined. This and previous studies together describe the four types of structures of a series of seven A(HO3PPh)(H2O3PPh) (A = Li, Na, K, Rb, Cs, Tl, NH4) phenylphosphonates. Sodium phenylarsonate is isostructural with its phenylphosphonate analogue. A(HO3PPh)(H2O3PPh) (A = Li, Na, K and Tl) compounds undergo methylamine intercalation
Electrophysiological Study on the Effects of Leptin in Rat Dorsal Motor Nucleus of the Vagus
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