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Extraction of the RMS Radii of 13C from Asymptotic Normalization Coefficients
LIN Cheng-Jian, LIU Zu-Hua, ZHANG Huan-Qiao, WU Yue-Wei, YANG Feng, RUANG Ming
Chin. Phys. Lett. 2001, 18 (11):
1446-1448
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The asymptotic normalization coefficients (ANCs) for three bound states of 13C (12C+n) are extracted from the angular distributions of 12C(d,p) reactions at Elab = 11.8MeV. With these ANCs, the calculated root-mean-square (rms) radii of these three states agree with our previous results. The ANCs are 1.93±0.17, 1.84±0.16, and 0.149±0.012fm-1/2, and the rms radii < r2 >1/2 are 3.39±0.31, 5.04±0.75 and 3.68±0.40 fm for the ground state, the first and third excitation states, respectively. Further analyses show that the first excitation state with D1 = 50.3% is a true neutron halo state, while the third excitation state with D1 = 25.2% is a neutron skin state.
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Precise Determination of 40Ti Mass by Measuring the 40Sc Isospin Analog State
LIU Wei-Ping, M. Hellströ, m, R. Collatz, J. Benlliure, L. Chulkov, D. Cortina Gil, F. Farget, H. Grawe, Z. Hu, N. Iwasa, M. Pfützner, A. Piechaczek, R. Raabe, I. Reusen, E. Roeckl, G. Vancraeynest, A. Wö, hr
Chin. Phys. Lett. 2001, 18 (11):
1449-1451
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The mass of 40Ti has been determined by using the isobaric multiplet mass equation method. The experimental data of 40Ti β-decay were used to determine the level of the isospin analog state of 40Sc. The ground-state mass excess and the QEC value for 40Ti were determined to be -9060±12keV and 11466±13keV, respectively.
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Evolution of Wave Energy Deposition Profile in HT-7 Lower Hybrid Current Drive Experiment
FANG Yu-De, SHI Yue-Jiang, KUANG Guang-Li, LIU Yue-Xiu, SHEN Wei-Ci, DING Bo-Jiang
Chin. Phys. Lett. 2001, 18 (11):
1487-1489
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Lower hybrid waves (LHWs) with a selected n|| spectrum have been used to control the energy deposition profiles, and then the wave driven current profiles effectively in tokamak discharges. In our lower hybrid current drive experiment in HT-7 tokamak, it was found that the setup of the wave energy deposition profile is a graduation process. In the beginning phase of the wave injection duration, the waves (with different n|| spectrum) deposit their energy almost all in the central region of the plasma column, even if their n|| are very different. Up to around one hundred milliseconds, the wave energy deposition profiles just can take their corresponding shapes according to the n|| spectrum of LHWs. It also shown that this evolution process is affected obviously by the LHW driven current profile, which has been formed early.
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Highly Conductive Nb-Doped BaTiO3 Epitaxial Thin Films Grown by Laser Molecular Beam Epitaxy
YAN Lei, LÜ, Hui-Bin, CHEN Zheng-Hao, DAI Shou-Yu, TAN Guo-Tai, YANG Guo-Zhen
Chin. Phys. Lett. 2001, 18 (11):
1513-1515
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The n-type conductive BaNb0.3Ti0.7O3 thin films were grown on SrTiO3(001) substrates by computer-controlled laser molecular beam epitaxy. The BaNb0.3Ti0.7O3 films with (001) orientation are epitaxially grown on SrTiO3 substrates, as confirmed by x-ray diffraction techniques. The root-mean-square surface roughness of the deposited thin films is measured to be 0.24nm by atomic force microscopy. The resistivity, carrier concentration and mobility of the BaNb0.3Ti0.7O3 thin film are 5.9 x 10-4Ω.cm, 1.8 x 1021cm-3 and 10.7cm2.V-1.s-1 at room temperature, respectively, which are the best values in Nb-doped BaTiO3 thin films reported so far to our knowledge.
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36 articles
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