THE 0–0 AND 1–0 BANDS OF THE A(3Πi)–X(3Σ−) SYSTEM OF NH

1959 ◽  
Vol 37 (10) ◽  
pp. 1171-1186 ◽  
Author(s):  
R. N. Dixon
Keyword(s):  
Intensity Distribution ◽  
Room Temperature ◽  
Flash Photolysis ◽  
Electronic States ◽  
Third Order ◽  
Astrophysical Interest ◽  
The Third ◽  
Concave Grating

NH molecules have been produced during the flash photolysis of HNCO, and the 0–0 and 1–0 bands of the A(3Πi) ← X(3Σ−) system have been photographed in absorption in the third order of a 21-foot concave grating spectrograph. The intensity distribution in the bands showed that the molecules were approximately at room temperature. The lines of lowest J value are identified for 25 branches of the 0–0 band and 19 branches of the 1–0 band. The analysis of the 0–0 band leads to a correction of the published line assignments for this band. The spin splittings in both the A and X electronic states, and the A-doubling in the A state, are considered in detail. Wavelengths in air are given for lines of astrophysical interest.

Bit-to-bit parallel multiplication based on the third-order nonlinear optical response in a dye-doped polymer film at room temperature

2010 ◽  
Author(s):  
G. M. Safiullin ◽  
V. G. Nikiforov ◽  
V. S. Lobkov ◽  
V. V. Samartsev ◽  
A. V. Leontiev
Keyword(s):  
Polymer Film ◽  
Nonlinear Optical ◽  
Room Temperature ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Third Order ◽  
The Third ◽  
Parallel Multiplication ◽  
Doped Polymer

Rotational Structure in the (2,0) Band of the C2 Δ3/2–X2 Π1/2 Subsystem of SbO

1974 ◽  
Vol 52 (7) ◽  
pp. 592-598 ◽  
Author(s):  
S. B. Rai ◽  
B. Rai ◽  
D. K. Rai
Keyword(s):  
Excited State ◽  
Ground State ◽  
Rotational Structure ◽  
Third Order ◽  
Rotational Constants ◽  
The Third ◽  
Concave Grating ◽  
Combining States

The rotational structure in (2,0) band of C2Δ3/2–X2Π1/2 subsystem of SbO molecule has been photographed in the third order of a 35 ft concave grating spectrograph, and the rotational constants of the two combining states have been determined. It is found that the new rotational constants for the ground state are in agreement with those reported by Rai et al., but the constants for the excited state differ appreciably from those reported earlier by Rao and Rao. A small λ-type doubling (≈4.0 × 10−6 cm−1) is observed in the excited state. The isotopic lines due to 123SbO have also been observed.

Kinetics and Temperature Dependence of the Hydration of NO+ in the Gas Phase

1973 ◽  
Vol 51 (3) ◽  
pp. 456-461 ◽  
Author(s):  
Margaret A. French ◽  
L. P. Hills ◽  
P. Kebarle
Keyword(s):  
Temperature Dependence ◽  
Gas Phase ◽  
Rate Constants ◽  
Room Temperature ◽  
Transfer Reaction ◽  
Negative Temperature ◽  
Ion Source ◽  
Third Order ◽  
The Third ◽  
Kinetics Of

The kinetics of the atmospherically important hydration sequence: NO+(H2O)n−1 + H2O = NO+(H2O)n and the transfer reaction NO+(H2O)n + H2O = HNO2 + H+(H2O)n were examined in nitrogen containing small quantities of NO and H2O with a pulsed high pressure ion source mass spectrometer. The room temperature mechanism and rate constants were found to be in agreement with earlier work in other laboratories. The temperature dependence of the reaction was examined for the range 27–157 °C. The transfer reaction does not occur at higher temperatures so that the NO+ hydration equilibria for n = 1 and 2 could be measured leading to ΔH1,0 = 18.5 and ΔH2,1 = 16.1 kcal/mol. The third order forward clustering rate constants were found to have negative temperature coefficients.

Rotational analysis of the A–X bands of AsO+

1969 ◽  
Vol 47 (15) ◽  
pp. 1601-1604 ◽  
Author(s):  
Rama Shanker ◽  
I. S. Singh ◽  
O. N. Singh
Keyword(s):  
Rotational Analysis ◽  
Third Order ◽  
Rotational Constants ◽  
The Third ◽  
Concave Grating

The (1,0) and (2,0) bands of the A–X system of the AsO+ molecule have been recorded in the third order of a 35-ft concave grating spectrograph. The rotational analysis has been carried out and the transition has been found to be 1Π–1Σ. The rotational constants are given.

scholarly journals The ultra- violet band of ammonia, and its occurrence the solar spectrum

1918 ◽  
Vol 94 (663) ◽  
pp. 470-471 ◽  
Keyword(s):  
Solar Spectrum ◽  
Ultra Violet ◽  
The Sun ◽  
Third Order ◽  
The Third ◽  
Other Substances ◽  
Violet Band ◽  
Band Spectra ◽  
Concave Grating ◽  
Unusual Appearance

A question of great interest in connection with the solar spectrum is that of the origin of the thousands of unidentified faint lines which were photographed and catalogued by Rowland. Some of these lines may possibly be identical with faint lines in metallic spectra which have not yet been completely tabulated, but in view of the presence of bands of cyanogen, carbon, and hydrocarbon, the possibility of the correspondence of most of them with band spectra of other substances should not be overlooked. As a contribution to this inquiry, the present investigation was undertaken primarily in order to determine whether Group P in the ultra-violet region of the solar spectrum might not be mainly due to the presence of ammonia in the absorbing atmosphere of the sun. Ammonia was already known to give a remarkable band in this region, having its greatest intensity near λ 3360, but existing records of the component lines were inadequate for comparison with the solar tables. Photographs were accordingly taken with instruments of various dispersions, ranging up to that of the third order of a 10 feet concave grating, a copper arc in an atmosphere of ammonia being employed as the source in the latter case. In view of the unusual appearance of the band, an attempt has also been made to elucidate the chief features of its structure.

Probe size and 5th-order aberration

1987 ◽  
Vol 45 ◽  
pp. 134-135 ◽  
Author(s):  
Zhifeng Shao
Keyword(s):  
Electron Probe ◽  
Spherical Aberration ◽  
Wave Length ◽  
Cylindrical Symmetry ◽  
Electron Wave ◽  
Third Order ◽  
The Third ◽  
Probe Radius ◽  
Small Probe ◽  
Probe Size

A small electron probe has many applications in many fields and in the case of the STEM, the probe size essentially determines the ultimate resolution. However, there are many difficulties in obtaining a very small probe.Spherical aberration is one of them and all existing probe forming systems have non-zero spherical aberration. The ultimate probe radius is given byδ = 0.43Csl/4ƛ3/4where ƛ is the electron wave length and it is apparent that δ decreases only slowly with decreasing Cs. Scherzer pointed out that the third order aberration coefficient always has the same sign regardless of the field distribution, provided only that the fields have cylindrical symmetry, are independent of time and no space charge is present. To overcome this problem, he proposed a corrector consisting of octupoles and quadrupoles.

Children’s Recall of Approximations to English

1973 ◽  
Vol 16 (2) ◽  
pp. 201-212 ◽  
Author(s):  
Elizabeth Carrow ◽  
Michael Mauldin
Keyword(s):  
Language Development ◽  
Fourth Order ◽  
Third Order ◽  
Memory Processes ◽  
The Third ◽  
General Index ◽  
General Linguistic

As a general index of language development, the recall of first through fourth order approximations to English was examined in four, five, six, and seven year olds and adults. Data suggested that recall improved with age, and increases in approximation to English were accompanied by increases in recall for six and seven year olds and adults. Recall improved for four and five year olds through the third order but declined at the fourth. The latter finding was attributed to deficits in semantic structures and memory processes in four and five year olds. The former finding was interpreted as an index of the development of general linguistic processes.

VSC of the third order systems with state and input signal constraints

2007 ◽  
Author(s):  
Andrzej Bartoszewicz ◽  
Aleksandra Nowacka
Keyword(s):  
Input Signal ◽  
Third Order ◽  
The Third
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