Download or read book SPECTRE DE VIBRATION ROTATION DE LA MOLECULE D AMMONIAC DANS LA REGION DE 10 MICRONS written by C.. CHASSAGNE and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: PRESENTATION DE LA METHODE D'OBTENTION DU SPECTRE AINSI QUE DE QUELQUES DETAILS EXPERIMENTAUX. ETUDE DES TRANSITIONS DE VIBRATION-ROTATION DE NH::(3) AU VOISINAGE DE 10 MU . CALCUL AVEC UNE PRECISION AMELIOREE DES VALEURS D'UN CERTAIN NOMBRE DE CONSTANTES SPECTROSCOPIQUES ET DES ENERGIES D'INVERSION. ATTRIBUTION D'UN CERTAIN NOMBRE DE RAIES

Download or read book Interpr tation du spectre de vibration rotation haute r solution de la mol cule d ammoniac dans la r gion de 6000 cm 1 written by Martine Hervé Hanotelle and published by . This book was released on 1972 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Rotation vibration Spectra of Ammonia in the 6 and 10 micron Regions written by Robert G. Breene and published by . This book was released on 1954 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spectroscopie d absorption de l ammoniac et tude du laser 15NH3 N2 inversion de population written by Kaddour Benzerhouni and published by . This book was released on 1988 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail présente une étude sur la molécule d'ammoniac dans sa forme naturelle ( 14 NH3 ) et l'une de ses formes isotopiques ( 15NH3 ) selon deux grandes directions :• D'une part, on traite de l'aspect spectroscopique de la molécule d'ammoniac en étudiant le profil spectral des raies d'absorption.• D'autre part, on utilise le gaz d'ammoniac pour réaliser un laser moléculaire dans le moyen-infrarouge pompé optiquement par un laser CO2.Dans le chapitre 1, on rappelle les données spectroscopiques sur la molécule d'ammoniac. En particulier, on présente la bande parallèle -√2 située dans la région de 10,5 μm, qui donne lieu à des coïncidences entre les raies d'émissions du laser C02 et les raies d'absorption de 14 NH3 et 15NH3.Dans le chapitre Il, on s'intéresse à l'étude des profils de raies de la molécule d'ammoniac pour la mesure des largeurs et des intensités. Ces mesures sont réalisées à partir de spectres enregistrés par un spectromètre à diode laser à haute résolution. La méthode de détermination de la largeur collisionnelle est décrite. Pour la mesure de l'intensité d'une raie, les différentes méthodes utilisées sont exposées brièvement. Dans chaque cas, on discute des avantages et des inconvénients de la méthode. Les résultats expérimentaux sont décrits et discutés ensuite.Dans le chapitre III, on rappelle les différents travaux antérieurs sur le laser à ammoniac, en particulier, le pompage optique hors résonance et le développement des sources Raman de puissance. L'utilisation du laser "Raman" à 12,08 μm pour des mesures d'absorption sur la raie sP(7,0) est exposée. Les résultats expérimentaux dans le cas de 14 NH3pur et en présence de gaz tampon (N2, He) sont décrits et discutés ensuite.Dans le chapitre IV, on s'intéresse au pompage optique en résonance de la molécule 15NH3.L'étude, la réalisation et l'optimisation du laser à inversion de population (15NH3 + N2) en anneau, émettant en continu à 11,76 μm sont décrites. Les principaux résultats expérimentaux du laser à 11.76 μm et les performances en puissance sont reportés. Un modèle à taux de population du gain à faible signal est établi. Une analyse du gain en fonction des principaux paramètres est décrite pour interpréter les résultats expérimentaux.

Download or read book VIBRATION ROTATION SPECTRUM OF MATRIX ISOLATED AMMONIA written by Robert Earl Meredith and published by . This book was released on 1963 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of NH3 and ND3 isolated in inert gas matrices at 4.2K was made in the regions of the Nu-1, -2, and -3 fundamentals, and in the vicinity of the overtone 2 Nu-4. The spectra were scanned with spectral slit widths ranging from .1 to .5/cm, and it was found that this resolution was adequate to insure that all the observed line widths and shapes were free from instrumental broadening. The Nu-2 fundamental was interpreted in terms of a free rotation model, with the line spacings and inversion splitting having values very close to those observed for gas phase molecules. The interpretation of the Nu-1, Nu-3 and 2 Nu-4 spectra was much more difficult, since these bands were too weak to permit observation of the 'E' type spectra, and since the inversion doubling of the levels involved cannot be observed due to the broadness of the lines. It was possible, however, to determine the dependence of the lines on the ratio of inert gas atoms to ammonia molecules, and to assign the transitions involved as arising from either single isolated molecules or from ammonia complexes caused by incomplete isolation. Argon, krypton, and xenon were successively used as matrices, and spectra obtained in each case differed only in the vibrational frequencies were shifted to longer wavelengths as the matrix was varied. (Author).

Download or read book Etude des spectres haute r solution de plusieurs mol cules non rigides written by Mohamed Elkeurti and published by . This book was released on 2008 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Au cours de cette thèse, on a procédé à une étude théorique des spectres d'absorption haute résolution des molécules non-rigides 15NH2D, 15ND2 et CH3COD. En ce qui concerne les deux premières molécules, leurs spectres de rotation-inversion et de vibration-rotation-inversion ont été analysés et environ 700 transitions ont été attribuées pour chaque molécule. L'analyse de ces données a conduit à la détermination des dédoublements d'inversion, des constantes rotationnelles et des paramètres relatifs à l'interaction rotation-inversion. En ce qui concerne CH3COD, nous nous sommes intéressées au spectre de rotation-torsion. Plus de 2500 transitions ont été attribuées dans les spectres expérimentaux micro onde et infrarouge lointain. L'analyse de ces données a permis l'obtention de la hauteur de la barrière de potentielle gênant la rotation interne. Pour ces trois molécules, nous avons construit des bases de données spectroscopiques à usage astrophysique

Download or read book High Resolution Study of the 6 10 and 16 Micron Vibration rotation Bands of Ammonia written by John Seymour Garing and published by . This book was released on 1958 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spectroscopie infrarouge haute r solution de la mol cule d ammoniac 14NH3 dans la r gion de 4 8 mum written by Claire Cottaz-Coqueblin and published by . This book was released on 2000 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Precision Measurement and Fundamental Constants Proceedings written by United States. National Bureau of Standards and published by . This book was released on 1971 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Anagram Solver written by Bloomsbury Publishing and published by Bloomsbury Publishing. This book was released on 2009-01-01 with total page 719 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anagram Solver is the essential guide to cracking all types of quiz and crossword featuring anagrams. Containing over 200,000 words and phrases, Anagram Solver includes plural noun forms, palindromes, idioms, first names and all parts of speech. Anagrams are grouped by the number of letters they contain with the letters set out in alphabetical order so that once the letters of an anagram are arranged alphabetically, finding the solution is as easy as locating the word in a dictionary.

Download or read book Dictionnaire des termes de m decine written by Henry Eugène de Méric and published by . This book was released on 1899 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Industrial Application of Radioisotopes written by Gábor Földiák and published by . This book was released on 1986 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Problems in Astrophysics written by Agnes Mary Clerke and published by Legare Street Press. This book was released on 2022-10-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Crossword Solver written by Anne Stibbs and published by Bloomsbury Pub Limited. This book was released on 2000 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: An aid to solving crosswords. It contains over 100,000 potential solutions, including plurals, comparative and superlative adjectives, and inflections of verbs. The list extends to first names, place names and technical terms, euphemisms and compound expressions, as well as abbreviations.

Download or read book Trichier written by Alessandra Ceretto and published by Lulu.com. This book was released on with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Antifascisms written by David Ward and published by Fairleigh Dickinson Univ Press. This book was released on 1996 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an in-depth analysis of three of the most crucial years in twentieth-century Italian history, the years 1943-46. After more than two decades of a Fascist regime and a disastrous war experience during which Italy changed sides, these years saw the laying of the political and cultural foundations for what has since become known as Italy's First Republic. Drawing on texts from the literature, film, journalism, and political debate of the period, Antifascisms offers a thorough survey of the personalities and positions that informed the decisions taken in this crucial phase of modern Italian history.

Download or read book The Acharnians written by Aristophanes and published by BoD – Books on Demand. This book was released on 2019-09-25 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reproduction of the original: The Acharnians by Aristophanes