TY  - JOUR
A1  - Becker, Charles R.
A1  - Nath, G.
T1  - Optical properties of LiIO\(_3\) in the far infrared
N2  - No abstract available
Y1  - 1970
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-37905
ER  - 
TY  - JOUR
A1  - Becker, Charles R.
T1  - Impurity-induced absorption in or near the phonon gap of KI
N2  - In or near the phonon gap of KI a single weak line due to OW (OD\(^-\)) at 69.7 (69.3) cm\(^{-1}\) has been observed. A second and much stronger line at 94.1 cm\(^{-1}\) was shown not to be related to OH\(^-\), but instead is thought to be due to CO\(_3\).
Y1  - 1970
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30757
ER  - 
TY  - JOUR
A1  - Becker, Charles R.
T1  - Evidence for a quasi-phonon gap in CsCl
N2  - The observed impurity induced far-infrared absorption in CsCl : Rb\(^+\) and CsCl : K\(^+\) is compared with a calculated density of acoustic phonon states in CsCl. The absorption due to CsCl : Rb\(^+\) displays a minimum between the acoustic and optic phonon bands. A narrow line is observed in CsCl: K\(^+\) at 85.8 cm\(^{-1}\) which falls in this quasi-phonon gap.
Y1  - 1971
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30767
ER  - 
TY  - JOUR
A1  - Decius, J. C.
A1  - Becker, Charles R.
A1  - Fredericks, W. J.
T1  - Force constants of the metaborate ion in alkali halides
N2  - No abstract available
KW  - Physik
Y1  - 1972
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-50935
N1  - Siehe dazu: Erratum: Force constants of the metaborate ion in alkali halides (http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-37992)
ER  - 
TY  - JOUR
A1  - Becker, Charles R.
A1  - Martin, T. P.
T1  - Infrared absorption by Impurity-pair resonant modes in NaCl:F
N2  - New resonant-mode infrared absorption lines have been observed in NaCl with high concentrations of fluorine impurities. The quadratic concentration dependence of the strength of these lines indicates that they are due to pairs of fluorine impurities. At the resonant frequencies, the motion of some host ions appears to be as important as the motion of the impurities themselves.
KW  - Festkörperphysik
Y1  - 1972
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-37840
SN  - 1098-0121
ER  - 
TY  - JOUR
A1  - Ishigama, M.
A1  - Becker, Charles R.
A1  - Martin, T. P.
A1  - Prettl, W.
T1  - Impurity-pair mode in NaCl:KF
N2  - No abstract available
Y1  - 1972
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31255
ER  - 
TY  - GEN
A1  - Decius, J. C.
A1  - Becker, Charles R.
A1  - Fredericks, W. J.
T1  - Erratum: Force constants of the metaborate ion in alkali halides
N2  - Erratum for the article: Decius, J. C. ; Becker, Charles R. ; Fredericks, W. J. : Force constants of the metaborate ion in alkali halides, In: THE JOURNAL OF CHEMICAL PHYSICS (1972), 56, 10, 5189-5190.
N2  - Hierbei handelt es sich um eine Korrektur zum Artikel: Decius, J. C. ; Becker, Charles R. ; Fredericks, W. J. : Force constants of the metaborate ion in alkali halides, In: THE JOURNAL OF CHEMICAL PHYSICS (1972), 56, 10, 5189-5190.
Y1  - 1973
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-37992
ER  - 
TY  - JOUR
A1  - Unkelbach, K. H.
A1  - Becker, Charles R.
A1  - Köhler, H.
A1  - Middendorff, A. V.
T1  - Optical Phonons of Bi\(_2\)Te\(_3\)
N2  - No abstract available
Y1  - 1973
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30809
ER  - 
TY  - JOUR
A1  - Köhler, H.
A1  - Becker, Charles R.
T1  - Optically active lattice vibrations in Bi\(_2\)Se\(_3\)
N2  - The preparation of Bi2Sea single crystals with low free carrier densities allowed an investigation of the lattice vibrations to be carried out from the reflectivity of cleavage planes at nearly normal incidence of the radiation (E ~ c). The experimental results ean be explained with two classical oscillators, whose eigenfrequencies oceur at 92 and 69.5 cm-I. The static dielectric constant was determined to be 100 ± 10 for E ~ c.
N2  - Die Praparation von Bi2Se3-Einkristallen mit niedriger Konzentration freier Ladungstrager erlaubte die Untersllchung der Gitterschwingungcn aus dem Reflexionsvermogen von Spaltflaclwn bci nahezu senkreehter Inzidenz der Stmhlung (E ~ c). Die .:\'IeBergebnisse konnen mit zwei klassischen Dispersionsoszillatoren erklart werden, deren Eigenfrequenzen bei 92 und 69,5 cm- I liegen. Dic st,atische Dielektrizitatskonstante wurde zu 100 ± 10 für E ~ c bestimmt.
Y1  - 1974
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31296
ER  - 
TY  - JOUR
A1  - Becker, Charles R.
A1  - Lau, Ph.
A1  - GEICK, R.
A1  - Wagner, V.
T1  - Antiferromagnetic Resonance in NiO:Co\(^{2+}\) and NiO:Fe\(^{2+}\)
N2  - No abstract available.
Y1  - 1975
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30772
ER  -