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Determination of90Sr in environmental samples with resonance ionization spectroscopy in collinear geometry (1994)

Zimmer, K. ; Stenner, J. ; Kluge, H. -J. ; [et al.]

Springer

Applied physics 59 (1994), S. 117-121

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ISSN: 1432-0649

Keywords: 89.60.+x ; 07.75.+h ; 28.70.+y

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract A new, fast technique for trace analysis of the radioactive isotopes89Sr and90Sr in environmental samples has been developed. Conventional mass separation is combined with resonance ionization spectroscopy in collinear geometry, which provides high selectivity and sensitivity. In addition, a chemical separation procedure for sample preparation has been developed. The described technique was used to determine the90Sr content in ≈ 870 m3 air samples collected near Munich during and shortly after the Chernobyl reactor accident in April 1986. The content of90Sr was measured to be 1.4 mBq per m3, corresponding to 1.6 × 109 atoms of90Sr per sample. This value is in good agreement with the results of radiochemical measurements.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01081161

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Cluster isobars for high-precision mass spectrometry (1991)

Lindinger, M. ; Becker, St. ; Bollen, G. ; [et al.]

Springer

The European physical journal 20 (1991), S. 441-443

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ISSN: 1434-6079

Keywords: 07.75. + h ; 35.10.Bg

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Doublet mass measurements of the isobars28Si3 and12C7 are performed by use of a Penning trap mass spectrometer and the Fourier transform ion cyclotron resonance (FT-ICR). The carbon and silicon cluster ions are produced by laser ablation. Results of these preliminary measurements are presented.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01544032

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γgaucheEffects in the 1H and 13C NMR spectra of steroids. IIFor Part I, see Ref. 1. (1991)

Hammann, P. E. ; Kluge, H. ; Habermehl, G. G.

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 29 (1991), S. 133-136

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ISSN: 0749-1581

Keywords: 17β-Substituted 14α-steroids ; 7α-substituted 14α-steroids ; 1H NMR ; 13C NMR ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: γgaucheEffects of 17β- and 7α-substituted 14α-steroids were studied by 1H and 13C NMR spectroscopy. A linear correlation was found between the 1H chemical shift of H-12β and the 13C chemical shift of C-12 for C-17β-substituted steroids and between the chemical shifts of H-14α and C-14 in C-7α-substituted compounds.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/mrc.1260290207

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