This work reports about measurements of isotope structure in Ni II and Fe II. We have used spectra from hollow-cathode lamps that have been recorded with the Fourier Transform Spectrometer at Kitt Peak National Observatory. Measurements of isotope shifts yield useful information about atomic and nuclear properties. With high-resolution spectroscopy at modern telescopes it is also possible to observe isotope shifts in stellar spectra (Leckrone et al. 1991). The importance of a general knowledge about isotope structure for studies of the solar spectrum has recently been pointed out (Kurucz 1992). This is especially true for elements having line-rich spectra and a high solar abundance. Ignoring isotope structure when constructing synthetic spectra may introduce systematic errors in the calculation of line profiles and may therefore affect e.g. abundance determinations.
本文报道了Ni II和Fe II同位素结构的测量。我们使用了由基特峰国家天文台的傅里叶变换光谱仪记录的空心阴极灯的光谱。对同位素位移的测量可以得到有关原子和核性质的有用信息。利用现代望远镜的高分辨率光谱学，还可以观察到恒星光谱中的同位素变化(Leckrone et al. 1991)。关于同位素结构的一般知识对于太阳光谱研究的重要性最近已被指出(Kurucz 1992)。对于谱线丰富和太阳丰度高的元素尤其如此。在构建合成光谱时忽略同位素结构可能会在线剖面计算中引入系统误差，从而可能影响例如丰度测定。
{"title":"Experimental Isotope Shifts in NI II and FE II","authors":"M. Rosberg, U. Litzén, S. Johansson","doi":"10.1093/MNRAS/262.1.L1","DOIUrl":"https://doi.org/10.1093/MNRAS/262.1.L1","url":null,"abstract":"This work reports about measurements of isotope structure in Ni II and Fe II. We have used spectra from hollow-cathode lamps that have been recorded with the Fourier Transform Spectrometer at Kitt Peak National Observatory. Measurements of isotope shifts yield useful information about atomic and nuclear properties. With high-resolution spectroscopy at modern telescopes it is also possible to observe isotope shifts in stellar spectra (Leckrone et al. 1991). The importance of a general knowledge about isotope structure for studies of the solar spectrum has recently been pointed out (Kurucz 1992). This is especially true for elements having line-rich spectra and a high solar abundance. Ignoring isotope structure when constructing synthetic spectra may introduce systematic errors in the calculation of line profiles and may therefore affect e.g. abundance determinations.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124806289","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}
The aluminum carbide molecule has been observed for the first time in the gas phase. This simple diatomic molecule was previously known only from matrix isolation ESR studies by Knight et al. [1] and the theoretical calculations of Bauschlicher et al. [2], A fairly strong B4Σ--X4Σ- electronic transition was predicted in the blue [2] analogous to the recendy observed BC molecule [3]. A search was made for this system of AlC in emission from a hollow cathode source using the 1m Fourier transform spectrometer at Kitt Peak National Observatory. The initial search was partially successful in that two weak bands were observed that had the correct form and could not be attributed to any known impurity spectrum. The experiment was repeated using more sensitive detectors and a narrower detection bandwidth, resulting in the spectra described here.
{"title":"Fourier Transform Emission Spectroscopy of the Aluminum Carbide Molecule","authors":"C. Brazier, P. Carrick","doi":"10.1364/hrfts.1992.thd9","DOIUrl":"https://doi.org/10.1364/hrfts.1992.thd9","url":null,"abstract":"The aluminum carbide molecule has been observed for the first time in the gas phase. This simple diatomic molecule was previously known only from matrix isolation ESR studies by Knight et al. [1] and the theoretical calculations of Bauschlicher et al. [2], A fairly strong B4Σ--X4Σ- electronic transition was predicted in the blue [2] analogous to the recendy observed BC molecule [3]. A search was made for this system of AlC in emission from a hollow cathode source using the 1m Fourier transform spectrometer at Kitt Peak National Observatory. The initial search was partially successful in that two weak bands were observed that had the correct form and could not be attributed to any known impurity spectrum. The experiment was repeated using more sensitive detectors and a narrower detection bandwidth, resulting in the spectra described here.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115114507","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}
Cube corner interferometers are now well accepted in practise in Fourier transform spectroscopy (FTS). However, there are quite many special qualities of cube corner interferometers which are completely different from conventional plane mirror interferometers. None of these characteristics are very well-known. In this paper we will introduce some which are very important in high resolution FTS. We will do this by introducing all high resolution cube corner interferometers constructed or under construction in Finland.
{"title":"Advantages of Cube Corner Interferometers in High Resolution Fourier Transform Spectroscopy","authors":"J. Kauppinen","doi":"10.1364/hrfts.1989.tub5","DOIUrl":"https://doi.org/10.1364/hrfts.1989.tub5","url":null,"abstract":"Cube corner interferometers are now well accepted in practise in Fourier transform spectroscopy (FTS). However, there are quite many special qualities of cube corner interferometers which are completely different from conventional plane mirror interferometers. None of these characteristics are very well-known. In this paper we will introduce some which are very important in high resolution FTS. We will do this by introducing all high resolution cube corner interferometers constructed or under construction in Finland.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123804738","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}
The instrument complement for the network sites will include very high resolution solar FTS systems. Characteristics of the FTS instruments are discussed.
网络站点的仪器补充将包括非常高分辨率的太阳能FTS系统。讨论了傅立叶变换仪器的特点。
{"title":"FTS Instrument Characteristics for the Network for Detection of Stratospheric Change","authors":"F. Murcray","doi":"10.1364/hrfts.1992.saa3","DOIUrl":"https://doi.org/10.1364/hrfts.1992.saa3","url":null,"abstract":"The instrument complement for the network sites will include very high resolution solar FTS systems. Characteristics of the FTS instruments are discussed.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"403 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115997023","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}
In the dusty circumstellar envelopes that sometimes occur around carbon-rich giant stars, acetylenic chemistry is very active (Cernicharo, et al. 1987). The circumstellar dust, some carbon compound thought to have condensed in or near the stellar photosphere (Ridgway and Ready, 1988), plays several roles.
在富含碳的巨星周围的星周尘埃包层中，乙炔化学非常活跃(Cernicharo, et al. 1987)。星周尘埃，一些碳化合物被认为是在恒星光球圈内或附近凝结的(Ridgway和Ready, 1988)，扮演着几个角色。
{"title":"Fourier Transform Spectroscopy of Circumstellar Envelopes","authors":"J. J. Ready","doi":"10.1364/hrfts.1989.tua6","DOIUrl":"https://doi.org/10.1364/hrfts.1989.tua6","url":null,"abstract":"In the dusty circumstellar envelopes that sometimes occur around carbon-rich giant stars, acetylenic chemistry is very active (Cernicharo, et al. 1987). The circumstellar dust, some carbon compound thought to have condensed in or near the stellar photosphere (Ridgway and Ready, 1988), plays several roles.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"58 5-6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114048113","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}
J. Travis, M. Salit, R. Winge, D. Eckels, S. Weeks
Inductively-coupled plasma optical emission spectrometry (ICP/OES) has become the primary tool of analytical atomic spectrometry over the past two decades.1 The success of the ICP may be largely attributed to a torch design which permits a droplet spray from a sample solution to be injected along the axis of the plasma, and from the ability of the plasma to evaporate the solvent, dissociate most chemical species, and render highly excited populations of free atoms and atomic ions. Species concentrations are determined by ratioing measured spectral line intensities to those for known "standard" solutions, and/or by adding quantitative "spikes" to the sample. Under normal operating conditions, the viewing zone utilized for chemical analysis is near local thermodynamic equilibrium (LTE), with an excitation temperature of about 6300K and an electron density of about 1016 cm-3. The high excitation energy is a mixed blessing, providing high sensitivity for about 70 elements, along with the possibility of spectral interferences from concomitant species. Reasonably high optical dispersion is employed to minimize spectral interferences, and interferences are normally characterized by line profiling and spectral tables.
{"title":"Application of Fourier Transform Optical Spectromety to the Preparation of a Spectral Atlas for Inductively-Coupled Plasma Optical Emission Spectrometry","authors":"J. Travis, M. Salit, R. Winge, D. Eckels, S. Weeks","doi":"10.1364/hrfts.1992.sac","DOIUrl":"https://doi.org/10.1364/hrfts.1992.sac","url":null,"abstract":"Inductively-coupled plasma optical emission spectrometry (ICP/OES) has become the primary tool of analytical atomic spectrometry over the past two decades.1 The success of the ICP may be largely attributed to a torch design which permits a droplet spray from a sample solution to be injected along the axis of the plasma, and from the ability of the plasma to evaporate the solvent, dissociate most chemical species, and render highly excited populations of free atoms and atomic ions. Species concentrations are determined by ratioing measured spectral line intensities to those for known \"standard\" solutions, and/or by adding quantitative \"spikes\" to the sample. Under normal operating conditions, the viewing zone utilized for chemical analysis is near local thermodynamic equilibrium (LTE), with an excitation temperature of about 6300K and an electron density of about 1016 cm-3. The high excitation energy is a mixed blessing, providing high sensitivity for about 70 elements, along with the possibility of spectral interferences from concomitant species. Reasonably high optical dispersion is employed to minimize spectral interferences, and interferences are normally characterized by line profiling and spectral tables.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114296418","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}
The diatomic molecule BC has received relatively little attention. The experimental information regarding the BC system is from mass spectroscopic studies of the vapor phase. Several theoretical investigations have been reported. These studies show that the ground state of BC is X4∑− and the next 4∑− state lies about 18000 cm−1 above the ground state.
{"title":"Fourier Transform Spectroscopy of BC and ZnD","authors":"W. T. Fernando, L. O'Brien, P. Bernath","doi":"10.1364/hrfts.1989.wa6","DOIUrl":"https://doi.org/10.1364/hrfts.1989.wa6","url":null,"abstract":"The diatomic molecule BC has received relatively little attention. The experimental information regarding the BC system is from mass spectroscopic studies of the vapor phase. Several theoretical investigations have been reported. These studies show that the ground state of BC is X4∑− and the next 4∑− state lies about 18000 cm−1 above the ground state.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"42 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120895881","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}
A Fourier Transform Spectrometer specially designed for the UV and VUV regions is being used at the Lund University Atomic Spectroscopy Group. The instrument, manufactured by Chelsea Instruments Ltd., UK, was purchased thanks to a grant from the Swedish Natural Science Research Council. In the grant application, particular emphasis was put on the possibility to produce accurate laboratory data for astrophysical research, and investigations with this purpose have accordingly dominated during the first year. More general atomic spectroscopy and atomic physics work will, however, also be carried out at the instrument, and such projects have already been initiated.
{"title":"Work In Progress at The LUND VUV-FTS","authors":"U. Litzén, S. Johansson","doi":"10.1364/hrfts.1992.saa4","DOIUrl":"https://doi.org/10.1364/hrfts.1992.saa4","url":null,"abstract":"A Fourier Transform Spectrometer specially designed for the UV and VUV regions is being used at the Lund University Atomic Spectroscopy Group. The instrument, manufactured by Chelsea Instruments Ltd., UK, was purchased thanks to a grant from the Swedish Natural Science Research Council. In the grant application, particular emphasis was put on the possibility to produce accurate laboratory data for astrophysical research, and investigations with this purpose have accordingly dominated during the first year. More general atomic spectroscopy and atomic physics work will, however, also be carried out at the instrument, and such projects have already been initiated.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114848834","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}
The advantages of the FTS over the classical grating spectrometer are clear - the fundamental gain is increased luminosity, with a consequent increase in the rate at which the spectrometer records basic information. Associated, but less fundamental gains include linearity in both intensity and frequency. An indirect but very real gain is the integration of computer and spectrometer, aiding the rapid and direct analysis of large quantities of data.
{"title":"FT500: A High Resolution VUV FTS: The Why and the How","authors":"J. Wheaton","doi":"10.1364/hrfts.1989.ma2","DOIUrl":"https://doi.org/10.1364/hrfts.1989.ma2","url":null,"abstract":"The advantages of the FTS over the classical grating spectrometer are clear - the fundamental gain is increased luminosity, with a consequent increase in the rate at which the spectrometer records basic information. Associated, but less fundamental gains include linearity in both intensity and frequency. An indirect but very real gain is the integration of computer and spectrometer, aiding the rapid and direct analysis of large quantities of data.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128199238","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}
In order to successfully produce high resolution spectra, a spectrometer must possess qualities such as precision optics, a high degree of optical stability, and sensitivity. Additionally, it is highly desirable that the instrument be versatile with respect to permitting a variety of samples to be scanned in the desired spectral regions. Otter practical considerations such as the time required to obtain the spectrum, and general ease of use should be considered in the spectrometer design. In order to meet such demanding criteria, it is clear that Fourier transform (FT) techniques would be appropriate.
{"title":"Recent Developments in High Resolution Spectroscopy Using the IFS 120 HR","authors":"A. Simon, R. Rubinovitz","doi":"10.1364/hrfts.1989.ma1","DOIUrl":"https://doi.org/10.1364/hrfts.1989.ma1","url":null,"abstract":"In order to successfully produce high resolution spectra, a spectrometer must possess qualities such as precision optics, a high degree of optical stability, and sensitivity. Additionally, it is highly desirable that the instrument be versatile with respect to permitting a variety of samples to be scanned in the desired spectral regions. Otter practical considerations such as the time required to obtain the spectrum, and general ease of use should be considered in the spectrometer design. In order to meet such demanding criteria, it is clear that Fourier transform (FT) techniques would be appropriate.","PeriodicalId":159025,"journal":{"name":"High Resolution Fourier Transform Spectroscopy","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132998395","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：