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131.
Thermal diffusion factors for the systems He-Ne, He-Ar, Ne-Ar, He-N2, and He-CO2 at 306 K have been predicted by using (m, 6, 8) potential parameters for like and unlike interactions calculated by combining accurate viscosity and second rivial coefficients (for like) and binary diffusion and interaction second viral coefficients (for unlike). For the first three systems the agreement with data previously reported is satisfactory; for the last two systems the agreement is not quite so good. 相似文献
132.
When basic aprotic solvents are added to methanol they become hydrogen bonded, and there is a consequent growth in non-bonded lone-pairs, (LP)free. Although corresponding non-bonded OH groups, (OH)free, have been detected for alcohols and for water, using overtone infrared spectroscopy, no different spectroscopic evidence for (LP)free groups has previously been reported. We have found that unique OH stretching bands develop when strongly basic solvents such as dimethylsulphoxide are added to methanol. Band maxima assigned to (LP)free groups occur at 3440 cm?1 in the fundamental and 6790 cm?1 in the overtone region. These are at considerably higher frequencies than those for bulk methanol (3340 cm?1 and 6600 cm?1) showing that the hydrogen bond is weakened in this unit, as expected. Proton resonance shifts for the OH protons of methanol on adding basic aprotic cosolvents are reported, and explained in terms of these results. 相似文献
133.
L.K. Fifield T.J.M. Symons C.H. Zimmerman M.J. Hurst F. Watt K.W. Allen 《Physics letters. [Part B]》1977,68(2):125-128
Levels at 7.17, 8.29, 8.96 and 9.88 MeV in 19F have been assigned spin and parity , , and , respectively, from resonance strength and γ-ray angular distribution measurements employing the 15N(α,γ) 19F reaction. An earlier assignment of to the 8.96 MeV level is incorrect. The measured properties of the states are compared with the results of both SU (3) shell model and cluster model calculations. 相似文献
134.
Y. Nojiri K. Matsuta T. Minamisono K. Sugimoto K. Takeyama H. Hamagaki S. Nagamiya K. Omata Y. Shida I. Tanihata T. Kobayashi S. Matsuki S. Shimoura J. R. Alonso G. Krebs T. J. M. Symons 《Hyperfine Interactions》1987,35(1-4):1019-1022
A new on-line isotope separator was constructed and used successfully for the study on short-lived isotopes at the Bevalac
at Lawrence Berkeley Laboratory. The isotopes were produced through projectile fragmentation processes of high energy heavy-ion
reactions. Various isotopes were rigidity-separated by use of a beam line and, finally, the desired single isotope was range
analyzed to stop in a catcher. A large number of β-emitting21F nuclei were successfully collected and the nuclear lifetime was determined by detecting β-rays. 相似文献
135.
Nicholas RJ Takashina K Lakrimi M Kardynal B Khym S Mason NJ Symons DM Maude DK Portal JC 《Physical review letters》2000,85(11):2364-2367
The electrical transport properties of a bipolar InAs/GaSb system have been studied in a magnetic field. The resistivity oscillates between insulating and metallic behavior while the quantum Hall effect shows a digital character oscillating from 0 to 1 conductance quantum e(2)/h. The insulating behavior is attributed to the formation of a total energy gap in the system. A novel looped edge state picture is proposed associated with the appearance of a voltage between Hall probes which is symmetric on magnetic field reversal. 相似文献
136.
Dongmei Zhou Yongnan Zheng K. Matsuta M. Mihara M. Fukuda D. Nishimura J. Komurasaki D. Ishikawa R. Matsumiya T. Nagatomo T. Izumikawa S. Takahashi H. Hirano T. Ohtsubo S. Momota Y. Nojiri A. Kitagawa M. Kanazawa M. Torikoshi S. Sato T. Minamisono J. R. Alonso G. F. Krebs T. J. M. Symons Daqing Yuan Yi Zuo Ping Fan T. Suzuki Xizhen Zhang Shengyun Zhu 《Hyperfine Interactions》2007,180(1-3):37-42
The magnetic moment of 28P (I π = 3?+?, T1/2 = 270.3 ms) in the ground state has been measured by the $\upbeta $ -nuclear magnetic resonance method for the first time. The measured magnetic moment of $\vert \upmu (^{28}$ P)∣ = 0.309(9) $\upmu _{{\rm N}}$ is well reproduced by the shell model value of +0.306 $\upmu _{{\rm N} }$ . The shell model calculation also yields a proton density distribution with a long tail. The present results provide a strong confirmation of the configuration of the 2s 1/2 proton which should lead to the proton halo. 相似文献