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32.
Hidehiro Suzuki Noritaka Usami Akiko Nomura Toetsu Shishido Kazuo Nakajima Takashi Suemasu 《Journal of Crystal Growth》2010,312(22):3257-3260
We investigated the impact of an amorphous Ge (a-Ge) thin layer inserted at the amorphous Si (a-Si)/Al interface on Al-induced crystallization. In situ observation of the growth process clarified that the nucleation rate is drastically reduced by insertion of a-Ge, which led to increase in the average size of crystal grains. This was interpreted as resulting from decrease in the driving force of crystallization, mainly due to the larger solubility of Ge in Al than that of Si in Al. The obtained films were SiGe alloys with lateral distribution of Ge content, and its origin is discussed based on the two-step nucleation process. 相似文献
33.
Yuan Daqing Fan Ping Zheng Yongnan Zuo Yi Zhou Dongmei Zhang Qiaoli Wu Xiaoguang Li Guangsheng Zhu Lihua Xu Guoji Fan Qiwen Zhang Xizhen K. Matsuta M. Fukuda M. Mihara T. Minamisono Zhu Shengyun 《Hyperfine Interactions》2010,198(1-3):129-132
Dependence of quasi-particle alignment on proton and neutron numbers has been studied in A?=?80 mass region through g-factor measurements by using TMF-IMPAD. The experimental results show that for the nuclides 84Zr, 85Zr and 86Zr with Z?=?40 the proton alignment is followed by the neutron alignment in 84Zr and 85Zr, while the neutron alignment is followed by the proton alignment in 86Zr, and for the nuclides 82Sr, 83Y, 84Zr and 85Nb with N?=?44 the proton aligns only in 82Sr, the proton alignment occurs first that is followed by the neutron alignment in 83Y and 84Zr and the neutron alignment is followed by the proton alignment in 85Nb. Proton and/or neutron alignments lead to different patterns of the g-factor variation with spin. 相似文献
34.
Masayuki Kitamura Noritaka Usami Takamasa Sugawara Kenrato Kutsukake Kozo Fujiwara Yoshitaro Nose Toetsu Shishido Kazuo Nakajima 《Journal of Crystal Growth》2005,280(3-4):419-424
The floating zone technique was employed to grow multicrystalline Si with controlled grain boundary configuration. Purposely designed bi-crystals were utilized as seed crystals to investigate the effect of the tilt angle from the perfect twin boundary on the growth behavior. When the growth was initiated from a bi-crystal with a Σ3 twin boundary, no particular change took place on the grain boundary configuration during growth. On the other hand, the decrease of the tilt angle during growth was observed when the growth was initiated from a bi-crystal with a tilted boundary from Σ3. This was accompanied by the appearance of new crystal grains. The reduction of the total interface energy would be a possible driving mechanism for this phenomenon. 相似文献
35.
Matsuta K. Fukuda M. Tanigaki M. Minamisono T. Nojiri Y. Akai H. Izumikawa T. Nakazato M. Mihara M. Yamaguchi T. Harada A. Sasaki M. Miyake T. Onishi T. Minamisono K. Fukao T. Sato K. Matsumoto Y. Ohtsubo T. Fukuda S. Yoshida K. Ozawa A. Momota S. Kobayashi T. Tanihata I. Alonso J. R. Krebs G. F. Symons T. J. M. 《Hyperfine Interactions》1996,97(1):501-508
The spin relaxation timeT
1 for short-lived beta emitters13O and23Mg implanted in Pt have been measured for the first time;T
1T13O) = 2.90 ±0.65 Ks andT
1
T(23Mg) = 1665 ±140 Ks. The Knight shift for13O in Pt was measured at 300 K to beK(13O) = +(4.23 ±0.14) × 10–3. In the case of13O, the Knight shift is unusually large and the relaxation time is unusually fast compared with other interstitial impurities in Pt. A KKR band-structure calculation reproduces the present large Knight shift fairly well. 相似文献
36.
K. Matsuta M. Mihara T. Nagatomo R. Matsumiya S. Momota T. Ohtsubo T. Izumikawa H. Hirano S. Takahashi D. Nishimura J. Komurasaki A. Kitagawa M. Kanazawa M. Torikoshi S. Sato M. Fukuda T. Minamisono T. Sumikama K. Tanaka M. Takechi D. Ishikawa S. A. Pahlovy M. Nagao Y. Nojiri J. R. Alonso G. F. Krebs T. J. M. Symons 《Hyperfine Interactions》2007,174(1-3):65-69
A brief review is presented of recent work with the Precision Penning Trap Mass Spectrometer, formerly at MIT, now at Florida
State University. This includes atomic mass comparisons using single trapped ions; mass comparisons using two simultaneously
trapped ions alternated between large and small cyclotron radii; and measurement of the dipole moment of a molecular ion using
the polarizability-induced shift in cyclotron frequency. 相似文献
37.
Zhu S. Y. Luo Q. Wang Y. G. Fan Z. G. Xu Y. J. Wang R. Zhu J. Z. Li G. S. Liu X. A. Wu X. G. Wen S. X. Xu G. J. Gao Z. C. Zhang X. Z. Chen Y. S. Matsuta K. Fukuda M. Mihara M. Minamisono T. 《Hyperfine Interactions》2001,136(3-8):205-209
The g-factors of the positive parity yrast rotational states in 84,86Zr have been precisely measured using a TMF-IMPAD method. The measured g factors indicate the proton alignment followed by neutron alignment in the g
9/2 high-j shell for 84Zr and the neutron alignment followed by proton alignment for 86Zr. The present results also reveal the structure transition at N=46 for Zr isotopes.
This revised version was published online in September 2006 with corrections to the Cover Date. 相似文献
38.
Matsuta K. Sasaki M. Tsubota T. Kaminaka S. Hashimoto K. Kudo S. Ogura M. Arimura K. Mihara M. Fukuda M. Akai H. Minamisono T. 《Hyperfine Interactions》2001,136(3-8):379-384
The hyperfine interactions of 8Li implanted in single crystal Fe have been studied using the β-NMR technique. One kind of hyperfine field B
hf was found. Since no dipolar field was observed, 8Li nuclei are suggested to sit in substitutional sites. The B
hf and the spin-lattice relaxation time T
1 were observed as functions of temperature. The experimental B
hf and T
1 were compared with the theoretical predictions from the first principles KKR-band-structure calculations. While predicted
B
hf for the substitutional site is consistent with the experiment, predicted T
1 cannot reproduce the experiment well.
This revised version was published online in September 2006 with corrections to the Cover Date. 相似文献
39.
Mihara M. Hashimoto K. Arimura K. Kudo S. Akutsu K. Minamisono K. Miyake T. Fukuda M. Matsuta K. Minamisono T. 《Hyperfine Interactions》2001,136(3-8):339-343
The hyperfine interactions of short-lived β-emitter 12B implanted into a CaB6 crystal have been studied by means of the β-NMR technique. An electric quadrupole splitting has been observed at room temperature
from which an electric field gradient of q=−(1.34±0.05)×1021 V/m2 was determined. From the present result, it was found that the 12B nuclei are mainly implanted in the substitutional boron site.
This revised version was published online in September 2006 with corrections to the Cover Date. 相似文献
40.
D. Nishimura Y. Fujita M. Fukuda E. Ganioğlu Y. Ichikawa M. Kanazawa A. Kitagawa M. Mihara S. Momota B. Rubio S. Sato G. Susoy M. Torikoshi K. Matsuta 《The European Physical Journal A - Hadrons and Nuclei》2011,47(12):1-7
A β-γ spectroscopy of the J π , 426 keV isomeric state of 24Al (24m Al) has been carried out by using a 24Al secondary beam with high purity and high isomeric ratio. From the absolute γ-ray and β-particle intensities observed in the decay of the isomeric state, the branching ratio R B of the isomeric γ decay from 24m Al to the J π = 4+, ground state of 24Al have been derived. The obtained R B value of 69.6(7)% is much smaller than the previously accepted value of 82.5(30)%. The precise half-life for the isomer decay, T 1/2 m = 130.9(13) ms, has been also determined in this experiment. Accordingly, the M3 γ-decay strength B(M3) of the 24m Al decay becomes smaller and the total β-decay branching ratio becomes larger. In particular, the β-decay branching ratio to the ground state of 24Mg becomes 24.3(9)%, which is 2.4 times larger than the previous value of 10.1(28)%. By combining the branching ratio and the half-life, the Gamow-Teller (GT) transition strength B(GT) of 0.0194(7) is deduced for the GT transition from 24m Al to the J π = 0+, ground state of 24Mg. This value is in good agreement with the values derived from charge-exchange reactions. 相似文献