The electronic (yellow and violet) emission spectra of zirconium nitride

1976 ◽  
Vol 54 (12) ◽  
pp. 1216-1223 ◽  
Author(s):  
John K. Bates ◽  
T. M. Dunn
Keyword(s):  
High Resolution ◽  
Emission Spectra ◽  
Zirconium Nitride ◽  
Violet Emission ◽  
Isoelectronic Molecules ◽  
Π State

Two emission systems of ZrN have been obtained under high resolution at 5700 and 4050 Å. They are the A2Π → X2Σ and B2Σ → X2Σ systems analogous to those previously known for the isoelectronic molecules ScO and TiN.Analysis of the B2Σ → X2Σ system of the 90Zr14N species yields the values B0 = 0.4587 cm−1 and B0 = 0.4830 cm−1 for the B and X states respectively, while for the A2Π state (which is severely perturbed at low J for the 90Zr14N species) the90Zr15N species gives B0 = 0.4523 cm−1 and this yields a (calculated) value for the A state of the 90Zr14N species of 0.4799 cm−1.There are four perturbations in the 2Π3/2 state of both the Zr14N and Zr15N species.

Nano-probe x-ray analysis and high-resolution imaging on planar defects in high-pressure synthesized infinite-layer superconductor

1994 ◽  
Vol 52 ◽  
pp. 728-729
Author(s):  
Y. Y. Wang ◽  
H. Zhang ◽  
V. P. Dravid ◽  
H. Zhang ◽  
L. D. Marks ◽  
...  
Keyword(s):  
High Pressure ◽  
High Resolution ◽  
Atomic Structure ◽  
Emission Spectra ◽  
High Resolution Electron Microscopy ◽  
Planar Defects ◽  
X Ray ◽  
Infinite Layer ◽  
Resolution Electron ◽  
Resolution Imaging

Azuma et al. observed planar defects in a high pressure synthesized infinitelayer compound (i.e. ACuO2 (A=cation)), which exhibits superconductivity at ~110 K. It was proposed that the defects are cation deficient and that the superconductivity in this material is related to the planar defects. In this report, we present quantitative analysis of the planar defects utilizing nanometer probe xray microanalysis, high resolution electron microscopy, and image simulation to determine the chemical composition and atomic structure of the planar defects. We propose an atomic structure model for the planar defects.Infinite-layer samples with the nominal chemical formula, (Sr1-xCax)yCuO2 (x=0.3; y=0.9,1.0,1.1), were prepared using solid state synthesized low pressure forms of (Sr1-xCax)CuO2 with additions of CuO or (Sr1-xCax)2CuO3, followed by a high pressure treatment.Quantitative x-ray microanalysis, with a 1 nm probe, was performed using a cold field emission gun TEM (Hitachi HF-2000) equipped with an Oxford Pentafet thin-window x-ray detector. The probe was positioned on the planar defects, which has a 0.74 nm width, and x-ray emission spectra from the defects were compared with those obtained from vicinity regions.

High resolution emission spectra of H2 and D2 near 80 nm

1980 ◽  
Vol 41 (12) ◽  
pp. 1431-1436 ◽  
Author(s):  
M. Larzillière ◽  
F. Launay ◽  
J.-Y. Roncin
Keyword(s):  
High Resolution ◽  
Emission Spectra

High-resolution far ultraviolet emission spectra of electron-excited molecular deuterium

1999 ◽  
Vol 32 (15) ◽  
pp. 3813-3838 ◽  
Author(s):  
H Abgrall ◽  
E Roueff ◽  
Xianming Liu ◽  
D E Shemansky ◽  
G K James
Keyword(s):  
High Resolution ◽  
Emission Spectra ◽  
Ultraviolet Emission ◽  
Far Ultraviolet

scholarly journals Predicting the stellar and non-equilibrium dust emission spectra of high-resolution simulated galaxies with dart-ray

2015 ◽  
Vol 449 (1) ◽  
pp. 243-267 ◽  
Author(s):  
Giovanni Natale ◽  
Cristina C. Popescu ◽  
Richard. J. Tuffs ◽  
Victor P. Debattista ◽  
Jörg Fischera ◽  
...  
Keyword(s):  
High Resolution ◽  
Dust Emission ◽  
Emission Spectra ◽  
Non Equilibrium

scholarly journals Analysis of new species retrieved from MIPAS

2014 ◽  
Vol 56 ◽  
Author(s):  
Shaomin Cai ◽  
Anu Dudhia
Keyword(s):  
Fourier Transform ◽  
New Species ◽  
High Resolution ◽  
Trace Gases ◽  
Michelson Interferometer ◽  
Emission Spectra ◽  
Fourier Transform Spectrometer ◽  
Mid Infrared ◽  
The Third ◽  
Atmospheric Sounding

The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument which operated on the Envisat satellite from 2002-2012 is a Fourier transform spectrometer for the measurement of high-resolution gaseous emission spectra at the Earth's limb. It operates in the near- to mid-infrared, where many of the main atmospheric trace gases have important emission features. The initial operational products were profiles of Temperature, H2O, O3, CH4, N2O, HNO3, and NO2, and this list was recently extended to include N2O5, ClONO2, CFC-11 and CFC-12. Here we present preliminary results of retrievals of the third set of species under consideration for inclusion in the operational processor: HCN, CF4, HCFC-22, COF2 and CCl4.

scholarly journals The Photochemical Reactivity of Some Benzoylthiophenes. III. The Effect of an Adjacent Methyl Group on the Excited State Reactivity of 2-Benzoylthiophene

1975 ◽  
Vol 53 (1) ◽  
pp. 1-11 ◽  
Author(s):  
D. R. Arnold ◽  
B. M. Clarke Jr.
Keyword(s):  
Excited State ◽  
Carbonyl Group ◽  
Emission Spectra ◽  
Ultraviolet Absorption ◽  
Photochemical Reactivity ◽  
Methyl Group ◽  
Partial Energy ◽  
Phosphorescence Emission ◽  
Π State

The ultraviolet absorption and phosphorescence emission spectra of 2-(2-methylbenzoyl) thiophene (1), 2-benzoyl-3-methylthiophene (2), 2-benzoyl-4-methylthiophene (3), and 2-benzoyl-5-methylthiophene (4) are reported and analyzed. Partial energy diagrams are constructed. The lowest triplet is assigned as a π,π* state of the 2-thienoyl chromophore in every case. Photocycloaddition of isobutylene to the carbonyl group was observed with 1 and 2. The oxetanes are thermally unstable; olefins 1-(2-thienyl)-1-(2-methylphenyl)-2-methylpropene (from 1) and 1-phenyl-1-(2-(3-methylthienyl))-2-methylpropene (from 2) were formed and characterized. Irradiation of 1 and 2 in O-deuteromethanol did not lead to incorporation of deuterium; no reaction was observed. These results are discussed in terms of the existing generalizations potentially useful for predicting photochemical reactivity.

High Resolution Measurements of Delayed Neutron Emission Spectra from Fission Products

1983 ◽  
pp. 261-264 ◽  
Author(s):  
T.-R. Yeh ◽  
D. D. Clark ◽  
G. Scharff-Goldhaber ◽  
R. E. Chrien ◽  
L.-J. Yuan ◽  
...  
Keyword(s):  
High Resolution ◽  
Neutron Emission ◽  
Fission Products ◽  
Emission Spectra ◽  
Delayed Neutron ◽  
Neutron Emission Spectra

Observing the Chemical State of Elements With Z=21 To 28 From L Alpha1 To L L Ratios With Energy Dispersive Spectroscopy (EDS)

1999 ◽  
Vol 5 (S2) ◽  
pp. 590-591
Author(s):  
A. Sandborg ◽  
R. Anderhalt
Keyword(s):  
High Resolution ◽  
Atomic Number ◽  
Energy Dispersive Spectroscopy ◽  
Emission Spectra ◽  
Outer Electron ◽  
Number Range ◽  
X Ray ◽  
Chemical Effects ◽  
Intensity Changes ◽  
Electron Shells

It is well known that chemical bonding affects elemental x-ray emission spectra. The spectra of low atomic number elements show energy shifts which depend on the bonding of the element. To observe these shifts, a high resolution wavelength dispersive (WDS) x-ray spectrometer is required. Intensity variations of the L series can be observed with an EDS system which also show chemical effects.The L Alphal and the L L radiations are produced from a vacancy in the L III shell. Normally the L L line is about 5 to 6% of the intensity of the L Alphal line. However, in the atomic number range of Z=21 to 28, it is easily observed that the L L line becomes more intense. The L Alphal is no longer present at Z=20. These intensity changes are due to the outer electron shells of these atoms being unfilled. The L Alphal comes from the L3-M5 transition, while the L L comes from L3-M1 transition. The M5 (3d level) of the M shell is partially filled for Z=21 to 28; empty for Z<21and full for Z> 28. Holliday observed a Ti LL which was 17% greater than the Ti L Alphal.

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