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Journal of research of the National Bureau of Standards. Section A, Physics and chemistry最新文献

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Color Phenomena Associated With Energy Transfer in Afterglows and Atomic Flames 余辉和原子火焰中与能量传递有关的颜色现象
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-07-01 DOI: 10.6028/jres.067A.041
A. Bass, H. Broida
{"title":"Color Phenomena Associated With Energy Transfer in Afterglows and Atomic Flames","authors":"A. Bass, H. Broida","doi":"10.6028/jres.067A.041","DOIUrl":"https://doi.org/10.6028/jres.067A.041","url":null,"abstract":"Reactions involving reactive species produced in electric discharges are frequently characterized by the emission of visible light of many different colors. Some typical afterglows and atomic flames have been photographed, and the observed colors (or spectral distributions) are discussed with regard to the reactions from which they arise. Laboratory studies of this sort are helpful for the understanding of the energy transfer processes which occur in flames, in electrical discharges, and in the upper atmosphere.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"12 1","pages":"379 - 388"},"PeriodicalIF":0.0,"publicationDate":"1963-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90409443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Infrared Spectrum of the v2+ v6 Band of C13C12H6* C13C12H6*的v2+ v6波段红外光谱
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-06-01 DOI: 10.6028/jres.067A.021
W. J. Lafferty, E. K. Plyler
{"title":"Infrared Spectrum of the v2+ v6 Band of C13C12H6*","authors":"W. J. Lafferty, E. K. Plyler","doi":"10.6028/jres.067A.021","DOIUrl":"https://doi.org/10.6028/jres.067A.021","url":null,"abstract":"The infrared spectrum of the v2+v6 band of C13C12H6 has been analyzed and a value of B0= 0.64865 ±0.00005 cm−1 determined. When this value is combined with that found in recent work on isotopically normal ethane, a “rs” value of 1.527±0.004 A for the carboncarbon bond distance is obtained. (Uncertainties are probable errors.)","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"48 1","pages":"225 - 227"},"PeriodicalIF":0.0,"publicationDate":"1963-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87433280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-Broadening of Carbon Monoxide in the 2 v and 3 v Bands * 一氧化碳在2v和3v波段的自展宽*
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.022
E. K. Plyler, R. J. Thibault
{"title":"Self-Broadening of Carbon Monoxide in the 2 v and 3 v Bands *","authors":"E. K. Plyler, R. J. Thibault","doi":"10.6028/jres.067A.022","DOIUrl":"https://doi.org/10.6028/jres.067A.022","url":null,"abstract":"The self-broadening of carbon monoxide has been measured for the 2 v and 3 v bands with pressures up to 3.5 atmospheres. A grating spectrometer of high resolving power was used for the measurements and the correction for finite slits was small. The corrections varied from 3 to 20 percent for the different conditions of measurement. The half-widths per atmosphere, γ°, decreased from 0.089 cm−1 for |m| = 1 to 0.053 cm−1 for |m| = 21. The half-widths are compared with those obtained by other investigators and it is shown that the results reported in this work fall in between the self-broadening values previously obtained.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"82 1","pages":"229 - 231"},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83769653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
An Absolute Calibration of the National Bureau of Standards Thermal Neutron Flux 国家标准局热中子通量的绝对校准
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.019
E. Axton
{"title":"An Absolute Calibration of the National Bureau of Standards Thermal Neutron Flux","authors":"E. Axton","doi":"10.6028/jres.067A.019","DOIUrl":"https://doi.org/10.6028/jres.067A.019","url":null,"abstract":"The NBS Thermal Neutron Flux has been calibrated in terms of the gold thermal neutron capture cross section. The effective thermal neutron (below cadmium cutoff energy) flux density is estimated to be 4307 ± 2 percent n/cm2 sec in September 1961. This figure is in agreement with a recent value quoted by the NBS.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"285 1","pages":"215 - 217"},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80438355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Thermodynamic Properties of Polyethylene Predicted from Paraffin Data. 根据石蜡数据预测的聚乙烯热力学性质。
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 Epub Date: 1963-06-01 DOI: 10.6028/jres.067A.023
Martin G Broadhurst
{"title":"Thermodynamic Properties of Polyethylene Predicted from Paraffin Data.","authors":"Martin G Broadhurst","doi":"10.6028/jres.067A.023","DOIUrl":"10.6028/jres.067A.023","url":null,"abstract":"<p><p>Thermodynamic data on the <i>n</i>-paraffins from <i>n</i>-C<sub>6</sub>H<sub>14</sub> through <i>n</i>-C<sub>18</sub>H<sub>38</sub> have been used to obtain values for the specific heat, entropy, enthalpy, and Gibbs free energy of a large, ideal CH<sub>2</sub>-chain crystal from 0 to 420 °K and of the liquid above 200 °K. Analytical expressions are given for the properties of the crystal and liquid above 200 °K. For the crystal, a modified Einstein function was used to adjust the melting temperature to 414.3 °K. Values between 975 and 1025 cal/mole for the heat of fusion were found to be the ones most consistent with the data. Comparison of the results with polyethylene data shows reasonable agreement.</p>","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"67A 1","pages":"233-240"},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5319452/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85427209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of Isomers of Eugenol1 丁香酚1异构体的合成
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.026
G. Brauer, Richard W. Morris, Willard B. Howe
{"title":"Synthesis of Isomers of Eugenol1","authors":"G. Brauer, Richard W. Morris, Willard B. Howe","doi":"10.6028/jres.067A.026","DOIUrl":"https://doi.org/10.6028/jres.067A.026","url":null,"abstract":"In connection with an investigation of the correlation between structure and reactivity of eugenol isomers, o-eugenol, 3-allyl-2-methoxyphenol and chavibetol were synthesized. A five-step synthesis was found to be most suitable for the preparation of 3-allyl-2-methoxyphenol. An improved separation of chavibetol from eugenol was achieved by gas chromatography.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"54 1","pages":"253 - 257"},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82624997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Purity Analysis of Highly Purified Materials by Time-Temperature Cryometry 时间-温度冷冻法分析高纯度材料的纯度
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.025
G. Ross, H. D. Dixon
{"title":"Purity Analysis of Highly Purified Materials by Time-Temperature Cryometry","authors":"G. Ross, H. D. Dixon","doi":"10.6028/jres.067A.025","DOIUrl":"https://doi.org/10.6028/jres.067A.025","url":null,"abstract":"Visual observation of the freezing and melting of compounds in cells used for the determination of purity has uncovered some heretofore unexpected behavior. This behavior has been correlated with certain difficulties experienced in the measurement of purity, particularly when the sample is very pure. Means for partially reducing these difficulties are proposed and procedures for increasing the accuracy of purity measurements are described.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"67 1","pages":"247 - 251"},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73768371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Absorption Bands of Carbon Dioxide* From 5.3 to 4.6 Microns 二氧化碳吸收波段*从5.3到4.6微米
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.020
A. Maki, E. K. Plyler, R. J. Thibault
{"title":"Absorption Bands of Carbon Dioxide* From 5.3 to 4.6 Microns","authors":"A. Maki, E. K. Plyler, R. J. Thibault","doi":"10.6028/jres.067A.020","DOIUrl":"https://doi.org/10.6028/jres.067A.020","url":null,"abstract":"Measurements have been made of the frequencies of the infrared absorption lines of CO2 in the region from 1850 cm−1 to 2150 cm−1. Observations were made at various pressures and pathlengths up to a maximum of 72 meter-atmospheres. Vibration-rotation constants were obtained characterizing the transitions 111c0–000, 111d0–000, 031c0–000, 031d0–000, 200–011c0, I22c0–011c0, 122d0–011d0 for C12O2. The 111c0–000 band due to the C13O2 molecule was also measured.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"32 1","pages":"219 - 223"},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78335936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
A Controlled Atmosphere Chamber 可控气氛室
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.028
C. L. Gordon, R. Johannesen
{"title":"A Controlled Atmosphere Chamber","authors":"C. L. Gordon, R. Johannesen","doi":"10.6028/jres.067A.028","DOIUrl":"https://doi.org/10.6028/jres.067A.028","url":null,"abstract":"An inert atmosphere chamber for the transfer of reactive materials is described. It has the advantages of being inexpensive, easily cleaned, and can be evacuated.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"1 1","pages":"269 - 271"},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82959380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of Families of Curves 曲线族的分析
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry Pub Date : 1963-05-01 DOI: 10.6028/jres.067A.027
J. Mandel, F. McCrackin
{"title":"Analysis of Families of Curves","authors":"J. Mandel, F. McCrackin","doi":"10.6028/jres.067A.027","DOIUrl":"https://doi.org/10.6028/jres.067A.027","url":null,"abstract":"A systematic approach is presented for fitting empirical expressions to data depending on two variables. The problem can also be described as the simultaneous fitting of a family of curves depending on a parameter. The proposed method reduces a surface fitting problem to that of fitting a few functions of one variable each. First, the surface is expressed in terms of these one-variable functions, and using an extension of two-way analysis of variance, the accuracy of this fit is assessed without having to determine, at this point, the nature of the one-variable functions. Then, the one-variable functions are fitted by customary curve-fitting procedures. For illustration, the method is applied to two sets of experimental data.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"31 1","pages":"259 - 267"},"PeriodicalIF":0.0,"publicationDate":"1963-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89560363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
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