Bonding and electronic states of boron in silicon nanowires characterized by an infrared synchrotron radiation beam

Nanoscale ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 7246-7251 ◽  
Author(s):  
N. Fukata ◽  
W. Jevasuwan ◽  
Y. Ikemoto ◽  
T. Moriwaki
Keyword(s):  
Synchrotron Radiation ◽  
Excited States ◽  
Silicon Nanowires ◽  
Ground State ◽  
Electronic States ◽  
Electronic Transitions ◽  
Synchrotron Radiation Beam ◽  
Radiation Beam ◽  
Acceptor Atom ◽  
Ft Ir

The first report of B local vibrational peaks and electronic transitions of a bound hole from the ground state of a B acceptor atom to excited states by means of micro-FT-IR measurements using an IR-SR beam.

Vibronically induced Jahn–Teller progressions in the electronic spectrum of iridium hexafluoride

1968 ◽  
Vol 46 (15) ◽  
pp. 1721-1724 ◽  
Author(s):  
J. C. D. Brand ◽  
G. L. Goodman
Keyword(s):  
Electronic Spectrum ◽  
Excited States ◽  
Electric Dipole ◽  
Ground State ◽  
Electronic States ◽  
Electronic Transitions ◽  
Electrostatic Forces ◽  
First Approximation ◽  
Jahn Teller

The absorption of IrF6 vapor between 0.7 and 1.3 μ consists of three distinct electronic transitions connecting the Γ8g ground state with higher Γ6g, Γ8g, and Γ7g states of the (5d f2g)3 configuration. In first approximation, Jahn–Teller forces vanish in the two Γ8g states, while the Γ6g and Γ7g states involve Kramers magnetic degeneracy, which cannot be split by electrostatic forces. Accordingly, no splittings of the ν2(eg) or ν5(f2g) excited states are observed in these spectra, but short progressions in ν5 do appear in the electric-dipole-allowed, vibronic parts of these transitions. These progressions are considered to show that Jahn–Teller anharmonicity can be induced by admixtures of odd-parity, orbitally degenerate electronic states, i.e. by the same mechanism through which these transitions derive their electric-dipole intensity.

CVD diamond films for synchrotron radiation beam monitoring

1999 ◽  
Author(s):  
Sultan B. Dabagov ◽  
Igor I. Vlasov ◽  
Violetta A. Murashova ◽  
Mikhail V. Negodaev ◽  
Victor G. Ralchenko ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Diamond Films ◽  
Cvd Diamond ◽  
Synchrotron Radiation Beam ◽  
Radiation Beam ◽  
Beam Monitoring

A synchrotron radiation beam-position monitor at the Taiwan Light Source

1998 ◽  
Vol 5 (3) ◽  
pp. 621-623 ◽  
Author(s):  
J.-R. Chen ◽  
T. S. Ueng ◽  
G. Y. Hsiung ◽  
T. F. Lin ◽  
C. T. Lee ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Synchrotron Radiation ◽  
Light Source ◽  
Photon Beam ◽  
Synchrotron Radiation Beam ◽  
Beam Position Monitor ◽  
Radiation Beam ◽  
Beam Position ◽  
Radiation Research

A prototype photon-beam-position monitor has been designed, fabricated and tested at the Taiwan Light Source of the Synchrotron Radiation Research Center. Aluminium was chosen as the material of the blade electrodes due to its low atomic number and high thermal conductivity. The resolution of this photon-beam-position monitor was <±1 µm. The sensitivity of the blade electrode has been measured in situ. Results of measurements for bending-magnet light and undulator light with different gaps are described.

Beamline for calibration of transfer standard light sources in the UV and VUV regions

1998 ◽  
Vol 5 (3) ◽  
pp. 759-761 ◽  
Author(s):  
Tatsuya Zama ◽  
Terubumi Saito ◽  
Hideo Onuki
Keyword(s):  
Electron Beam ◽  
Synchrotron Radiation ◽  
Primary Standard ◽  
Orbital Plane ◽  
Magnetic Flux Density ◽  
Light Sources ◽  
Synchrotron Radiation Beam ◽  
Radiation Beam ◽  
Radiant Intensity ◽  
Transfer Standard

A beamline which serves for calibrating transfer standard light sources (deuterium lamps, excimer lamps, Xe lamps etc.) in the UV and VUV regions is being constructed. The synchrotron radiation from the electron storage ring TERAS (750 MeV) is used as a primary standard of spectral radiant intensity. In order to use synchrotron radiation as a primary standard, the electron beam and synchrotron radiation beam parameters need to be evaluated. Uncertainties of synchrotron radiation flux evaluated by measurements of the magnetic flux density, the position of the electron orbital plane, the electron beam size and the distance from the synchrotron radiation tangent point to the detector system are expected to be about 0.003, 0.01, 0.05 and 0.1%, respectively.

Upconversion Luminescence Study of Er3+ in Gadolinium-Calcium- Silicoborate Glasses

2013 ◽  
Vol 770 ◽  
pp. 249-253 ◽  
Author(s):  
Jakrapong Kaewkhao ◽  
Hong Joo Kim ◽  
Smit Insiripong ◽  
Natthakridta Chanthima ◽  
Siriprapa Kaewjaeng ◽  
...  
Keyword(s):  
Excited States ◽  
Ground State ◽  
Upconversion Luminescence ◽  
Optical Devices ◽  
Electronic Transitions ◽  
Potential Candidate ◽  
Melt Quenching ◽  
Absorption Bands ◽  
Green Is ◽  
Glass Series

The new glass series were prepared in compositions 25Gd2O3-10CaO-10SiO2-(55-x) B2O3-xEr2O3 (where x is 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol %) by normal melt-quenching technique at the melting temperature of 1,400 °C. The optical spectra were measured and shown absorption bands were assigned to appropriate f-f electronic transitions of Er3+ ions from the 4I15/2 ground state to the following excited states: 4G11/2, 2H9/2, 4F5/2, 4F7/2, 2H11/2, 4S3/2, 4F9/2, 4I9/2 and 4I11/2. Single peak from upconversion luminescence was observed at 531 nm (green) is assigned to the 2H11/24I15/2. In this work, the strongest peak at 2.0 % mol of Er2O3 was observed. In this work, suggests that the Er3+ ion in gadolinium calcium silicoborate glasses possibly considered as a potential candidate for applications in upconversion-based optical devices.

Investigation of synchrotron-radiation beam turning using a cylindrical surface

1992 ◽  
Vol 13 (5) ◽  
pp. 400-416 ◽  
Author(s):  
Yu. M. Aleksandrov ◽  
I. N. Bukreeva ◽  
A. V. Vinogradov ◽  
I. V. Kozhevnikov ◽  
M. O. Koshevoi ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Cylindrical Surface ◽  
Synchrotron Radiation Beam ◽  
Radiation Beam
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