New vibrational quantum number assignments for the UV absorption bands of ozone based on the isotope effect

1979 ◽  
Vol 71 (2) ◽  
pp. 815-820 ◽  
Author(s):  
D. H. Katayama
Keyword(s):  
Quantum Number ◽  
Isotope Effect ◽  
Uv Absorption ◽  
Vibrational Quantum Number ◽  
Absorption Bands

scholarly journals The absorption band spectrum of chlorine—II

1930 ◽  
Vol 127 (806) ◽  
pp. 638-657 ◽  
Keyword(s):  
Absorption Band ◽  
Quantum Number ◽  
Band Spectrum ◽  
Vibrational Quantum Number ◽  
Absorption Bands ◽  
Electronic Level ◽  
Intensity Measurements ◽  
Quantum Numbers ◽  
The Subject ◽  
The Absolute

As the results of measurements and analysis of the absorption bands of chlorine, communicated in a previous paper, seemed to justify further work on the same problem, particularly with regard to intensity measurements, these bands have been further investigated and the results form the subject of this paper. In the publication referred to, the analysis of three bands due to Cl 35 CI 35 was described, and the discovery of the corresponding isotope band CI 35 CI 37 in the case of one of them enabled the absolute numbering for the vibrational quantum number in the upper electronic level to be determined, if one assumed that the vibrational quantum numbers for the lower level were known.

In Situ and Ex Situ Ellipsometric Characterization of Oxygen Plasma and UV Radiation Effects on Spacecraft Materials

1997 ◽  
Vol 502 ◽  
Author(s):  
C. L. Bungay ◽  
T. E. Tiwald ◽  
M. J. DeVries ◽  
B. J. Dworak ◽  
John A. Woollam
Keyword(s):  
Uv Radiation ◽  
Oxygen Plasma ◽  
Index Of Refraction ◽  
Uv Absorption ◽  
Ex Situ ◽  
Absorption Bands ◽  
Space Applications ◽  
Growth Trends ◽  
Ellipsometry Data

ABSTRACTAtomic Oxygen (AO) and ultraviolet (UV) radiation contribute (including synergistically) to degradation of spacecraft materials in Low Earth Orbit (LEO). NASA is, therefore, interested in determining what effects the harsh LEO environment has on materials exposed to it, as well as develop materials that are more AO and UV resistant. The present work involves the study of AO and UV effects on polyarylene ether benzimidazole (PAEBI) with in situ and ex situ spectroscopic ellipsometry. PAEBI is a polymer proposed for space applications due to its reported ability to form a protective phosphorous oxide on the surface when exposed to AO. In our experiments PAEBI was exposed to UV radiation from a xenon lamp while in situ ellipsometry data were acquired. The effects of UV radiation were modeled as an exponentially graded layer on the surface of bulk PAEBI. The change in UV absorption spectra, depth profile of the index of refraction, and growth trends of the UV irradiated PAEBI were all studied in these experiments. In addition, PAEBI was exposed to an oxygen plasma to simulate the synergistic effects of AO and UV. Ellipsometry data were acquired in-line with both a UV-Visible ellipsometer and an infrared ellipsometer. The change in UV absorption bands and index of refraction due to synergistic AO/UV, as well as the growth trends of the oxide layer were studied.

The D and D′ states of the PO molecule

1968 ◽  
Vol 46 (18) ◽  
pp. 2079-2086 ◽  
Author(s):  
R. D. Verma ◽  
M. N. Dixit
Keyword(s):  
Quantum Number ◽  
Isotopic Shift ◽  
Rotational Analysis ◽  
Vibrational Quantum Number

A rotational analysis of the 0–0, 0–1, and 0–2 bands of the D–B and D′–B systems of PO in the region 5500–6900 Å has been carried out from a spectrum obtained at a resolution higher than that of previous workers (Couet and Guenebaut 1966; Couet et al. 1967). The mutual perturbation between D2Πr and D′2Πr has been confirmed from the rotational analysis of the 0–0 and 0–1 bands of the D–A and D′–X systems in the region 2000–2200 Å. The analysis of the D′–X bands has shown that the previously reported E′ state lying between the D and D′ states is actually part of the D′ state. The constants of the D2Πr, D′ 2Πr, B2Σ+, and X2Π states are evaluated and compared with the constants of earlier workers to remove the inconsistency existing in their values for the B and X states.The isotopic bands corresponding to P18O of the D–B and D′–B systems are obtained, thus showing that the D′ state has an anomalous isotopic shift and that the observed levels of the D and D′ states have the vibrational quantum number ν =.

Alternating Intensities and Isotope Effect in the Blue-Green Absorption Bands ofLi2

1930 ◽  
Vol 35 (7) ◽  
pp. 789-801 ◽  
Author(s):  
A. Harvey ◽  
F. A. Jenkins
Keyword(s):  
Isotope Effect ◽  
Absorption Bands

scholarly journals Structure in the secondary hydrogen spectrum—Part V

1926 ◽  
Vol 113 (764) ◽  
pp. 368-419 ◽  
Keyword(s):  
Quantum Number ◽  
Vibrational State ◽  
Final States ◽  
Vibrational Quantum Number ◽  
Vibrational States ◽  
Rydberg Constant ◽  
Infra Red ◽  
Preliminary Account ◽  
Before And After ◽  
State Of Affairs

In a previous paper entitled “Structure in the Secondary Hydrogen Spectrum,” Part IV, it was shown that there were a number of bands associated with Fulcher’s bands. It now appears that these and other related bands form a set of band systems whose null lines are connected by a Rydberg-Ritz formula. This formula has the normal value of the Rydberg constant, as is the case with the formula found by Fowler to connect the heads of some of the helium bands. This discovery makes it possible to apportion the effects observed as between electron jumps and vibration jumps, a matter which had to be left open in the previous paper (p. 740). The present paper deals only with the Q branches which are the most strongly developed and have been investigated most fully. A preliminary account of some of the results has been published a letter to ‘Nature,’ but the numbering of the vibrational states of the H α bands proposed therein has since been abandoned. It will be shown that all the lines of Fulcher’s red bands arise as a result of transitions in which the total quantum number (electron jump) changes from 3 to 2 and the vibrational quantum number is unchanged. In the part of the band denoted by A in “Structure,” Part IV, the vibrational state has the lowest possible quantum number both before and after the transition. I shall indicate this state of affairs by the symbol 0 → 0. The corresponding vibrational states in the parts denoted by B, C, D, E and F are, both initially and finally, 1, 2, 3, 4 and 5, and I shall denote these transitions by 1 →1, 2 → 2 , 3 → 3 , 4 → 4 and 5 → 5 respectively. The different lines in part A all have the same electron jump (3 → 2) and the same vibration state (0 → 0) but have different rotational jumps either of the molecule as a whole or of the emitting electron or of both. This statement will be equally true if the letter A is replaced by any of the letters B, C, D, E or F, except that the vibrational jump 0 0 is replaced by 1 → 1, 2 → 2, etc. In the present paper I shall confine my attention to the Q branches so that all the rotational transitions here dealt with are of the type m + ½ → m + ½ , m = 1, 2, 3, 4, 5, etc. (see Part IV, p. 749). Fulcher’s green bands also have the same electron jumps (3 → 2), but in these bands the vibrational quantum number is higher by unity in the initial than in the final states. Thus for the various green bands denoted by the letters A, B, C, D, E and F the vibrational transitions are 1 → 0, 2 → 1, 3 → 2, 4 → 3, 5 → 4 and 6 → 5 respectively. In addition to these, bands with the same electron jump (3 → 2) can be found in the infra-red with the vibrational jumps 0 → 1, 1 → 2, 2 → 3, 3 → 4 and 4 → 5 and others on the side of the green towards the violet which correspond to the vibration jumps 2 → 0, 3 → 1, 4 → 2, 5 → 3 and 6 → 4, and a few lines which may correspond to the vibration jumps 3 → 0 and 5 → 2. All these lines have the electron jump 3 → 2 and are the band analogue of the single line H α in the line spectrum of the hydrogen atom. For this reason it is convenient to refer to this system of bands as the H α bands.

Peculiarities of the manifestation of the K absorption bands in the UV absorption spectra of azomethine bases

1977 ◽  
Vol 13 (8) ◽  
pp. 837-840
Author(s):  
V. I. Pavskii ◽  
N. A. Kabo ◽  
A. E. Lipkin ◽  
V. A. Terent'ev
Keyword(s):  
Absorption Spectra ◽  
Uv Absorption ◽  
Absorption Bands ◽  
Uv Absorption Spectra

scholarly journals Photodarkening of Infrared Irradiated Yb3+-Doped Alumino-Silicate Glasses: Effect on UV Absorption Bands and Fluorescence Spectra

Fibers ◽  
2013 ◽  
Vol 1 (3) ◽  
pp. 101-109 ◽  
Author(s):  
Hrvoje Gebavi ◽  
Daniel Milanese ◽  
Stefano Taccheo ◽  
David Mechin ◽  
Achille Monteville ◽  
...  
Keyword(s):  
Fluorescence Spectra ◽  
Silicate Glasses ◽  
Uv Absorption ◽  
Absorption Bands ◽  
Alumino Silicate
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