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Journal articles on the topic 'Far-infrared spectra'

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1

Schade, Ulrich, Dawei Cao, Ljiljana Puskar, Eglof Ritter, and Jörg Beckmann. "Removal of Etalon Features in the Far-Infrared–Terahertz Transmittance Spectra of Thin Polymer Films." Applied Spectroscopy 74, no. 12 (2020): 1530–39. http://dx.doi.org/10.1177/0003702820922295.

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Etalon features in infrared spectra of stratified samples, their influence on the interpretation, and methods to circumvent their presence in infrared spectra have been in discussion for decades. This paper focuses on the application of a method originally developed to remove interference fringes in the mid-infrared spectra for far-infrared Fourier transform spectroscopy on thin polymer films. We show that the total transmittance reflectance technique, commonly used for mid-infrared, also works successfully in the far-infrared spectral range where other approaches fail. Experimental spectra ob
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2

Coveliers, B., W. K. Ahmed, A. Fayt, and H. Bürger. "Far-infrared spectra of DCCCN." Journal of Molecular Spectroscopy 156, no. 1 (1992): 77–88. http://dx.doi.org/10.1016/0022-2852(92)90094-5.

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3

Mookherjee, Mainak, Simon A. T. Redfern, and Ming Zhang. "Far-infrared spectra of ammonium layer and framework silicates." Neues Jahrbuch für Mineralogie - Monatshefte 2004, no. 1 (2004): 1–9. http://dx.doi.org/10.1127/0028-3649/2004/2004-0001.

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4

Siebenmorgen, R., P. Scicluna, and J. Krełowski. "Far-infrared emission of massive stars." Astronomy & Astrophysics 620 (November 23, 2018): A32. http://dx.doi.org/10.1051/0004-6361/201833546.

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We present results of the analysis of a sample of 22 stars of spectral types from O7 to B5 and luminosity classes I–V for which spectra from the Infrared Spectrograph (IRS) of Spitzer are available. The IRS spectra of these stars are examined for signs of excess infrared (IR) emission by comparison with stellar atmospheric spectra. We find that the spectra of half of the studied stars are dominated by excess emission in the far-IR, including all six super- and bright giants. In order to examine the origin of the far-IR excess, we supplement the Spitzer data with optical high-resolution echelle
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5

Campbell, Stephen, and Kristin M. Poduska. "Incorporating Far-Infrared Data into Carbonate Mineral Analyses." Minerals 10, no. 7 (2020): 628. http://dx.doi.org/10.3390/min10070628.

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Polycrystalline carbonate minerals (including calcite, Mg-calcite, and aragonite) can show distinctive variations in their far-infrared (FIR) spectra. We describe how to identify mixed-phase samples by correlating FIR spectral changes with mid-infrared spectra, X-ray diffraction data, and simple peak overlap simulations. Furthermore, we show how to distinguish portlandite-containing (Ca(OH) 2 ) mixtures that are common in heated calcium carbonate samples. Ultimately, these results could be used for tracking how minerals are formed and how they change during environmental exposure or processing
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6

Thomas, G. A., R. N. Bhatt, A. Millis, R. Cava, and E. Rietman. "Far-Infrared Spectra of Oxide Superconductors." Japanese Journal of Applied Physics 26, S3-2 (1987): 1001. http://dx.doi.org/10.7567/jjaps.26s3.1001.

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7

Gerbaux, Xavier, Armand Hadni, Masato Tazawa, and J. C. Villegier. "Far-infrared spectra of magnesium oxide." Applied Optics 33, no. 1 (1994): 57. http://dx.doi.org/10.1364/ao.33.000057.

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8

Calvani, P., S. Cunsolo, P. Maselli, and P. Postorino. "Far-infrared spectra ofN2-Ar alloys." Physical Review B 39, no. 12 (1989): 8622–27. http://dx.doi.org/10.1103/physrevb.39.8622.

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9

Thomas, G. A., H. K. Ng, A. J. Millis та ін. "Far-infrared spectra of polycrystallineBa2YCu3O9−δ". Physical Review B 36, № 1 (1987): 846–49. http://dx.doi.org/10.1103/physrevb.36.846.

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10

Gao, F., R. A. Lewis, X. L. Wag, and S. X. Dou. "Far Infrared Spectra of La1−xCaxMn0.9Li0.1O3." Journal of Physics: Conference Series 28 (January 1, 2006): 143–46. http://dx.doi.org/10.1088/1742-6596/28/1/031.

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11

Matei, Adriana, Natalia Drichko, Bruno Gompf, and Martin Dressel. "Far-infrared spectra of amino acids." Chemical Physics 316, no. 1-3 (2005): 61–71. http://dx.doi.org/10.1016/j.chemphys.2005.04.033.

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12

Spire, A., M. Barthes, H. Kellouai, and G. De Nunzio. "Far-infrared spectra of acetanilide revisited." Physica D: Nonlinear Phenomena 137, no. 3-4 (2000): 392–401. http://dx.doi.org/10.1016/s0167-2789(99)00178-5.

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13

Ohta, Hitoshi, Ryuzo Tanaka, Mitsuhiro Motokawa, Satoru Kunii, and Tadao Kasuya. "Far-Infrared Transmission Spectra of SmB6." Journal of the Physical Society of Japan 60, no. 4 (1991): 1361–64. http://dx.doi.org/10.1143/jpsj.60.1361.

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14

Čogurić, G. D., Z. V. Popović, D. Stojanović, O. Žižić, and W. König. "Far infrared spectra of Hg1−xMnxSe." Solid State Communications 77, no. 7 (1991): 555–58. http://dx.doi.org/10.1016/0038-1098(91)90740-m.

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15

Zelsmann, H. R., and Z. Mielke. "Far-infrared spectra of benzoic acid." Chemical Physics Letters 186, no. 6 (1991): 501–8. http://dx.doi.org/10.1016/0009-2614(91)90458-l.

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16

Lane, Melissa D., Edward A. Cloutis, Roger N. Clark та ін. "Reflectance Spectroscopy of 27 Fine-particulate Mineral Samples from Far-ultraviolet through Mid-infrared (0.12–20 μm)". Planetary Science Journal 5, № 8 (2024): 189. http://dx.doi.org/10.3847/psj/ad5af7.

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Abstract This paper presents far-ultraviolet through mid-infrared (0.12–20 μm) reflectance spectra of 27 fine-particulate (<10 μm) terrestrial mineral samples, providing continuous spectra that cover an unusually broad spectral range and are of unusually fine particle size relative to most existing spectral libraries. These spectra of common geologic materials are useful for future applications that study the dust on various planetary bodies. Reflectance spectra were acquired of the samples at multiple laboratories at multiple wavelengths. All of the spectra were compared to one another to
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17

Maestri, Tiziano, William Cossich, and Iacopo Sbrolli. "Cloud identification and classification from high spectral resolution data in the far infrared and mid-infrared." Atmospheric Measurement Techniques 12, no. 7 (2019): 3521–40. http://dx.doi.org/10.5194/amt-12-3521-2019.

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Abstract. A new cloud identification and classification algorithm named CIC is presented. CIC is a machine learning algorithm, based on principal component analysis, able to perform a cloud detection and scene classification using a univariate distribution of a similarity index that defines the level of closeness between the analysed spectra and the elements of each training dataset. CIC is tested on a widespread synthetic dataset of high spectral resolution radiances in the far- and mid-infrared part of the spectrum, simulating measurements from the Fast Track 9 mission FORUM (Far-Infrared Ou
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18

Pucetaite, Milda, Sandra Tamosaityte, Anders Engdahl, Justinas Ceponkus, Valdas Sablinskas, and Per Uvdal. "Microspectroscopic infrared specular reflection chemical imaging of multi-component urinary stones: MIR vs. FIR." Open Chemistry 12, no. 1 (2014): 44–52. http://dx.doi.org/10.2478/s11532-013-0349-6.

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AbstractSpecular reflection infrared microspectroscopy was used for chemical imaging of cross-sectioned urinary stones to determine their chemical composition and morphology simultaneously. Absorption spectral bands were recovered from reflection spectra by Kramers-Kronig transform. FUse of far-infrared radiation provides high-contrast images and allows more precise constituent distribution determinations than mid-infrared because band asymmetry after the transform caused by diffuse reflection is less in the far-infrared.
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19

Bantges, Richard J., Helen E. Brindley, Jonathan E. Murray, et al. "A test of the ability of current bulk optical models to represent the radiative properties of cirrus cloud across the mid- and far-infrared." Atmospheric Chemistry and Physics 20, no. 21 (2020): 12889–903. http://dx.doi.org/10.5194/acp-20-12889-2020.

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Abstract. Measurements of mid- to far-infrared nadir radiances obtained from the UK Facility for Airborne Atmospheric Measurements (FAAM) BAe 146 aircraft during the Cirrus Coupled Cloud-Radiation Experiment (CIRCCREX) are used to assess the performance of various ice cloud bulk optical property models. Through use of a minimization approach, we find that the simulations can reproduce the observed spectra in the mid-infrared to within measurement uncertainty, but they are unable to simultaneously match the observations over the far-infrared frequency range. When both mid- and far-infrared obse
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20

Ulashkevich, Yu V., V. V. Kaminskii, and M. M. Kazanin. "Far-infrared reflection spectra of SmS polycrystals." Physics of the Solid State 54, no. 11 (2012): 2198–200. http://dx.doi.org/10.1134/s1063783412110303.

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21

MATSUMOTO, Souhei, Masahiro SHOJI, and Susumu KOTAKE. "Far Infrared Spectra by Molecular Dynamics Method." Transactions of the Japan Society of Mechanical Engineers Series B 57, no. 541 (1991): 3306–9. http://dx.doi.org/10.1299/kikaib.57.3306.

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22

Massa, Néstor E., Silvina Pagola, and Raúl Carbonio. "Far-infrared reflectivity and Raman spectra ofBa5Nb4O15." Physical Review B 53, no. 13 (1996): 8148–50. http://dx.doi.org/10.1103/physrevb.53.8148.

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23

Trajić, J., M. Romčević, N. Romčević, B. Babić, B. Matović, and P. Baláž. "Far-infrared spectra of mesoporous ZnS nanoparticles." Optical Materials 57 (July 2016): 225–30. http://dx.doi.org/10.1016/j.optmat.2016.05.004.

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24

Romčević, M., N. Romčević, and V. N. Nikiforov. "Far-infrared spectra of Pb1−xMnxTe alloys." Infrared Physics & Technology 42, no. 6 (2001): 541–45. http://dx.doi.org/10.1016/s1350-4495(01)00062-7.

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25

Romčević, M., and N. Romčević. "Far-infrared spectra of Hg1−xMnxTe alloys." Infrared Physics & Technology 44, no. 1 (2003): 35–41. http://dx.doi.org/10.1016/s1350-4495(02)00175-5.

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26

Kumazaki, Kenji, Norihiko Nishiguchi, and Kazuaki Imai. "Far infrared reflection spectra of layered semiconductors." Mikrochimica Acta 94, no. 1-6 (1988): 427–30. http://dx.doi.org/10.1007/bf01205922.

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27

Paul B., Davies, Liu Yuyan, and Liu Zhuan. "Far infrared LMR spectra of monobromomethyl radicals." Chemical Physics Letters 214, no. 3-4 (1993): 305–9. http://dx.doi.org/10.1016/0009-2614(93)85640-a.

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28

Allone, G., V. Grasso, and F. Neri. "Far infrared vibrational spectra of a-Si." Solar Energy Materials 15, no. 6 (1987): 413–19. http://dx.doi.org/10.1016/0165-1633(87)90090-6.

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29

Velde, B., and R. Couty. "Far infrared spectra of hydrous layer silicates." Physics and Chemistry of Minerals 12, no. 6 (1985): 347–52. http://dx.doi.org/10.1007/bf00654345.

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30

Zavodov, I. A., L. M. Kuznetsova, S. V. Grigorieva, and L. I. Maklakov. "Far-infrared spectra of some segmented polyurethanes." Journal of Molecular Structure 375, no. 3 (1996): 193–96. http://dx.doi.org/10.1016/0022-2860(95)09095-9.

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31

Guelachvili, Guy, K. Narahari Rao, Richard H. Tipping, Brenda P. Winnewisser, and Manfred Winnewisser. "Far infrared spectra of solid molecular nitrogen." Mikrochimica Acta 95, no. 1-6 (1988): 339–43. http://dx.doi.org/10.1007/bf01349783.

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32

Dočekalová, Z., P. Marton, P. Ondrejkovic, and J. Hlinka. "Far-infrared reflectivity spectra of nanotwinned GaV4Se8." Phase Transitions 91, no. 9-10 (2018): 942–52. http://dx.doi.org/10.1080/01411594.2018.1510499.

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33

Zavodov, I. A., L. M. Kuznetsova, S. V. Grigorieva, and L. I. Maklakov. "Far-infrared spectra of some segmented polyurethanes." Journal of Molecular Structure: THEOCHEM 375, no. 3 (1996): 193–96. http://dx.doi.org/10.1016/0166-1280(96)91076-3.

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34

Tanaka, Jiro, Masaaki Shimizu, and Koichi Mizuno. "Far-infrared spectra of Bi2Sr2CaCu2O8 single crystal." Journal of Superconductivity 7, no. 2 (1994): 479–80. http://dx.doi.org/10.1007/bf00724593.

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35

COVELIERS, B., W. K. AHMED, A. FAYT, and H. BUERGER. "ChemInform Abstract: Far-Infrared Spectra of DCCCN." ChemInform 24, no. 8 (2010): no. http://dx.doi.org/10.1002/chin.199308039.

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36

Ismailov, A., S. Babaev, M. Tagyev та K. Allakhverdiev. "Far-Infrared Absorption Spectra of ɛ-InSe". physica status solidi (b) 176, № 1 (1993): K39—K40. http://dx.doi.org/10.1002/pssb.2221760137.

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37

Reach, William T. "Far-Infrared Spectral Observations of the Galaxy by the Far-Infrared Absolute Spectrophotometer." Symposium - International Astronomical Union 169 (1996): 567–73. http://dx.doi.org/10.1017/s0074180900230349.

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The Galactic continuum spectrum from 5–96 cm−1 is derived from COBE/FIRAS observations. The spectra are dominated by warm dust emission, which may be fit with a single temperature along each line of sight in the range 16–21 K. A widespread, very cold component (4–7 K) with optical depth that is spatially correlated with the warm component is also detected. The nature of the cold component and its implications for the amount of very cold material in the Milky Way are discussed.
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38

Chen, Wei-Te, Graham A. Bowmaker, John M. Seakins, and Ralph P. Cooney. "Vibrational Spectroscopic Study of Iodine-Doped Poly(Isothianaphthene)." Applied Spectroscopy 56, no. 7 (2002): 909–15. http://dx.doi.org/10.1366/000370202760171590.

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Far-infrared, mid-infrared, and Raman spectroscopy were used to characterize iodine-doped poly(isothianaphthene) (PITN) films and powders. The far-infrared and mid-infrared results show changes from absorption mode to reflective mode as the doping level increases, consistent with the iodine-doped PITN becoming more metallic and more conductive at higher doping levels. The far-IR and Raman (514.5-nm laser excitation) results show that I3− is dominant in iodine-doped PITN. The Raman spectral changes observed using 1064-nm excitation are different from those measured using 514.5-nm excitation. Th
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39

Magurno, Davide, William Cossich, Tiziano Maestri, et al. "Cirrus Cloud Identification from Airborne Far-Infrared and Mid-Infrared Spectra." Remote Sensing 12, no. 13 (2020): 2097. http://dx.doi.org/10.3390/rs12132097.

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Airborne interferometric data, obtained from the Cirrus Coupled Cloud-Radiation Experiment (CIRCCREX) and from the PiknMix-F field campaign, are used to test the ability of a machine learning cloud identification and classification algorithm (CIC). Data comprise a set of spectral radiances measured by the Tropospheric Airborne Fourier Transform Spectrometer (TAFTS) and the Airborne Research Interferometer Evaluation System (ARIES). Co-located measurements of the two sensors allow observations of the upwelling radiance for clear and cloudy conditions across the far- and mid-infrared part of the
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40

Padilla, A., and J. Pérez. "A Simulation Study of the Far-Infrared Absorption Spectra of HCl Diluted in Liquid Ar." International Journal of Spectroscopy 2013 (September 24, 2013): 1–8. http://dx.doi.org/10.1155/2013/485432.

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The far-infrared absorption coefficient of HCl diluted in liquid Ar has been calculated by using a mixed classical-quantum stochastic simulation approach. The simulated spectra have been compared with the available experimental data at different thermodynamic conditions without using ad hoc fitting parameters. Despite the fact that some discrepancies can be observed in the high frequency side of the far-infrared bands, a reasonable agreement has been found between the theoretical and the experimental spectral profiles. Both, classical and quantum simulated line shapes were comparatively analyz
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41

Temps, F., H. Gg Wagner, and M. Wolf. "Far-Infrared Laser Magnetic Resonance Detection of CH2Cl." Zeitschrift für Naturforschung A 47, no. 5 (1992): 660–64. http://dx.doi.org/10.1515/zna-1992-0504.

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Abstract New Far Infrared Laser Magnetic Resonance (LMR) spectra have been detected in the reaction of Cl atoms with CH2CO. Based on chemical and kinetic evidence they were assigned to CH2Cl radicals. The assignment was substantiated by subsequent experiments which employed the reactions of F atoms with CH3Cl and Na atoms with CH2Cl2, respectively. The three different sources yielded identical spectra
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42

Donini, J. C., and K. H. Michaelian. "Low-Frequency Photoacoustic Spectroscopy of Solids." Applied Spectroscopy 42, no. 2 (1988): 289–92. http://dx.doi.org/10.1366/0003702884428239.

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Research-quality far-infrared photoacoustic (PA) spectra are obtainable with a Fourier transform infrared spectrometer, the only changes with respect to conventional mid-infrared PA spectroscopy being the use of (1) a caesium iodide or polyethylene window on the PA cell, and (2) a mylar beamsplitter. Far-infrared PA spectra of several solids (bentonite, Fe+3-bentonite, and asbestos), in addition to the PA reference carbon black, have been recorded in this way. In order to improve signal-to-noise ratios in one of the spectra, we recorded ten interferograms under identical conditions; it was fou
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43

Pechar, František. "Infrared spectra of the natural zeolite heulandite." Collection of Czechoslovak Chemical Communications 50, no. 10 (1985): 2134–38. http://dx.doi.org/10.1135/cccc19852134.

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The mid-infrared (4 000-200 cm-1) absorption spectra, far infrared (400-40 cm-1) absorption spectra, infrared (1 400-200 cm-1) reflection spectra, and Raman spectra (3 600-50 cm-1) were measured at room temperature for polycrystalline heulandite, a natural zeolite from Poonah, India.
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44

MAO NIAN-XIN, HUANG YE-XIAO, LU WEI, et al. "FAR-INFRARED SPECTRA OF NATURALLY OCCURRING FeS2(Pyrite)." Acta Physica Sinica 42, no. 10 (1993): 1712. http://dx.doi.org/10.7498/aps.42.1712.

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45

Belogorokhov, A. I., I. I. Ivanchik, D. R. Khokhlov, and E. I. Slynko. "PbTe(Ga) Photoconductivity Spectra in the Far Infrared." Defect and Diffusion Forum 103-105 (January 1993): 433–36. http://dx.doi.org/10.4028/www.scientific.net/ddf.103-105.433.

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46

Gascooke, Jason R., Dominique Appadoo, and Warren D. Lawrance. "Torsion–vibration interactions determined from (far) infrared spectra." Journal of Chemical Physics 155, no. 12 (2021): 124306. http://dx.doi.org/10.1063/5.0062070.

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47

Park, Jae H., and Bruno Carli. "Analysis of far-infrared emission Fourier transform spectra." Applied Optics 25, no. 19 (1986): 3490. http://dx.doi.org/10.1364/ao.25.003490.

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48

Helle, M., A. Harju, and R. M. Nieminen. "Far-infrared spectra of lateral quantum dot molecules." New Journal of Physics 8, no. 2 (2006): 27. http://dx.doi.org/10.1088/1367-2630/8/2/027.

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49

Kamitsos, E. I., M. A. Karakassides, and G. D. Chryssikos. "Far-infrared spectra of binary alkali borate glasses." Solid State Ionics 28-30 (September 1988): 687–92. http://dx.doi.org/10.1016/s0167-2738(88)80126-7.

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50

Shibata, Hiroyuki, and Tomoaki Yamada. "Far-infrared transmission spectra in high-Tc superconductors." Physica C: Superconductivity 293, no. 1-4 (1997): 191–95. http://dx.doi.org/10.1016/s0921-4534(97)01537-2.

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