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91.
K. Nagamine S. Nagamiya O. Hashimoto N. Nishida T. Yamazaki B. D. Patterson 《Hyperfine Interactions》1975,1(1):517-532
The hyperfine field on a positive muon at interstitial site in a nickel single crystal has been measured by the muon spin rotation method in the temperature range from 0.12 K to 300 K. The hyperfine field in the low temperature limit was found to be ?640.7±2.2 Gauss. While the saturation magnetization decreases by 7% as the temperature increases from 0.1 K to 300 K, the hyperfine field seen by the muon remains nearly constant. Possible mechanisms for explaining this result are considered. 相似文献
92.
Quantum diffusion of positive muons has been studied in high purity Ta by zero and longitudinal field muon spin relaxation
techniques. We found that the muon hopping rate in Ta is more or less the same as in pure Cu (i.e., \nu\simeq105\sim106\ s™1), showing a characteristic temperature dependence proportional to T™\alpha with \alpha ranging from 2 to 0.2 below 20 K. In addition, a step‐like change of the nuclear dipolar width was observed at
60 K associated with the sharp peak of hopping rate, suggesting a change of stable muon sites.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
93.
Kanetada Nagamine 《Hyperfine Interactions》1996,103(1):123-135
The ideas of providing intense high-quality eV to keV muons (μ+μ−) proposed in the eighties have been tested during the last five years. Recently, remarkable success was marked for ultra-slow
μ+, while a promising test result was obtained for ultra-slow μ−. The ultimate future of these beams is considered. A possible large-scale application to an eventual μ+μ− collider is discussed. 相似文献
94.
95.
G.M. Kalvius L. Asch D.R. Noakes R. Keitel J.H. Brewer E.J. Ansaldo F.J. Litterst B. Boucher J. Chappert A. Yaouanc T. Yamazaki K. Nagamine K. Nishiyama O. Hartmann R. Wppling 《Journal of magnetism and magnetic materials》1987,70(1-3):285-287
Muon spin relaxation in crystalline and amorphous DyAg has been studied in the paramagnetic and magnetically ordered regimes. In cr-DyAg the critical slowing down of the Dy3+ spin fluctuation is seen on approaching TN = 60 K. In the ordered state we observe a Lorentzian field distribution. The muon spin relaxation in am-DyAg approaches at lower temperatures a root exponential law usually encountered in spin glasses. 相似文献
96.
We report recent progress to date on the UT‐MSL/KEK “Ultra Slow Muon” project, in which thermal muonium (Mu) atoms are generated
from the surface of a hot tungsten target placed at the primary 500 MeV proton beam line and resonantly ionized by intense
u.v. lasers synchronized with the emission of the Mu. The positive muon ionization fragments are collected by electrostatic
beam optics to form a beam of slow positive muons.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
97.
98.
L. C. C. M. Nagamine H. R. Rechenberg
A. E. Ray
《Journal of magnetism and magnetic materials》1990,89(3):L270-L272We have investigated the crystallographic site distribution of Fe atoms in Sm2(Co1−xFex)17 and Sm(Co0.90−vFevCu0.08---Zr0.02)8.35 alloys by means of Mössbauer spectroscopy. Fe shows a strong preference for 2c (dumbbell) sites in the former system, but in the multicomponent alloys such preference is reduced. This result gives support to a model proposed by Ray, according to which Zr-vacancy pairs displace Fe---Fe dumbbell pairs during the solutionizing heat treatment of these permanent-magnet materials. 相似文献
99.
100.
K. Nagamine T. Matsuzaki K. Ishida I. Watanabe R. Kadono G. H. Eaton H. J. Jones G. Thomas W. G. Williams 《Hyperfine Interactions》1994,87(1):1091-1098
By utilizing the intense pulsed proton beam available at the ISIS facility of RAL, the new muon facility project of an advanced superconducting muon channel funded by the RIKEN is now under construction. The new facility, by adopting the superconducting solenoid system, will produce the strongest backward decay pulsed
+ or
–in the momentum range from 20 MeV/c to 120 MeV/c. Also, by adopting the pulsed magnetic kicker, each one of two muon pulses will be supplied to two extraction channels simultaneously. Various important muon science experiments including advanced pulsed
–SR andmu
+SR experiments will be realized. 相似文献