Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Harry W. K. Tom"'
Autor:
Kevin Osorno, Harry W. K. Tom, H. J. Rutbeck-Goldman, A. C. L. Jones, R. G. Greaves, D. J. Adams, Jeremy Moxom, G. G. Cecchini, Allen P. Mills, M. Leventhal, M. Fuentes-Garcia
Publikováno v:
Physical review letters. 119(5)
Slow atoms in Rydberg states can exhibit specular reflection from a cylindrical surface upon which an azimuthally periodic potential is imposed. We have constructed a concave mirror of this type, in the shape of a truncated oblate ellipsoid of revolu
Autor:
Bernardo Barbiellini, H. J. Rutbeck-Goldman, Allen P. Mills, A. M. Piñeiro, Jan Kuriplach, A. C. L. Jones, T. H. Hisakado, Harry W. K. Tom
Publikováno v:
Physical review letters. 117(21)
The affinity ${A}_{\mathrm{Ps}}$ of positronium (Ps) atoms for a metal is the negative of the maximum kinetic energy with which Ps is emitted into vacuum when thermalized positrons in a metal encounter the surface. When this quantity is measured by g
Autor:
Eiko Torikai, Koichiro Shimomura, K. Yokoyama, Roland Kawakami, Katsuhiko Ishida, Francis L. Pratt, K. Ohishi, Harry W. K. Tom, Yasuhiro H. Matsuda, Ichiro Shiraki, Kanetada Nagamine, Pavel Bakule
Publikováno v:
Physics Procedia. 30:231-234
In our ZF μ + SR studies of the spin-dependent response to the polarized conduction electrons produced by circularly polarized 830 nm laser light in a semi-metallic and strain-free n- type GaAs (3×10 16 cm -3 Si), among possible states of positive
Publikováno v:
Physical review letters. 114(15)
Recently it has been discovered that positronium (Ps), after forming in metal-organic framework (MOF) crystals, is emitted into vacuum with a high efficiency and low energy that can only be explained by its propagating as delocalized Bloch states. We
Publikováno v:
Clays and Clay Minerals. 54:12-24
The reactivity of colloidal particles is regulated by their surface properties. These properties affect the wettability, flocculation-dispersion characteristics, ion exchange, sorption capacities and transport of inorganic colloids. Most studies have
Autor:
T. H. Hisakado, David Cassidy, A. C. L. Jones, H. J. Goldman, Allen P. Mills, Harry W. K. Tom
Publikováno v:
Physical Review A. 90
The production of long-lived Rydberg positronium (Ps) and correction for Doppler shifts in the excitation laser frequencies are crucial elements of proposed measurements of the gravitational freefall of antimatter and for precision measurements of th
Publikováno v:
Chemical Physics. 251:283-308
The general theory and experimental considerations are presented for a novel all-optical time-domain technique for measuring low frequency vibrational modes of surfaces (phonons or adsorbate vibrational modes). A pump-laser pulse impulsively drives a
Autor:
Eiko Torikai, Pavel Bakule, K. Yokoyama, Kanetada Nagamine, Francis L. Pratt, Koichiro Shimomura, Roland Kawakami, Harry W. K. Tom, Yasuhiro H. Matsuda
Publikováno v:
Physica B: Condensed Matter. 404:856-858
The spin-dependent exchange scattering between the muonium (Mu) electron and polarized conduction electrons excited by circularly polarized 831 nm laser light was observed in n-type GaAs with 3.6×1016 cm−3 Si doping at low temperature by measuring
Publikováno v:
Physical Review Letters. 83:3745-3748
Publikováno v:
Physical Review B. 59:12220-12223
We have used an all-optical technique to observe optical phonons localized at a buried interface. The technique is based on coherent excitation of the interfacial vibrational mode by femtosecond laser irradiation and detection of the free-induction d