Results 151 to 160 of about 906,774 (172)
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Journal of Chemical Education, 1989
The concepts of isotopic abundance, mass defect, fragmentation, and nuclear binding energies are all illustrated in the readily interpretable spectrum of a nonorganic material.
Gerald O. Dudek, Emily P. Dudek
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The concepts of isotopic abundance, mass defect, fragmentation, and nuclear binding energies are all illustrated in the readily interpretable spectrum of a nonorganic material.
Gerald O. Dudek, Emily P. Dudek
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The deconvolution of a mass spectrum [PDF]
Canadian Journal of Physics, 1968 The use of digital recording systems for mass spectrometers is rapidly expanding. The design of such systems is rather critical if subtle sources of error are to be avoided. This paper reports the theoretical considerations on which Weichert et al. (1967) based their design.
D. H. Weichert, R. D. Russell
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International Journal of Mass Spectrometry and Ion Physics, 1970
Abstract The charge exchange mass spectrum of NO2 has been studied in a tandem mass spectrometer. The agreement with photon impact and electron impact mass spectra proves that at least the fragmentation process giving NO+ takes place from a molecule-ion that has been formed directly without autoionization processes.
Einar Lindholm, G. Sahlström
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Abstract The charge exchange mass spectrum of NO2 has been studied in a tandem mass spectrometer. The agreement with photon impact and electron impact mass spectra proves that at least the fragmentation process giving NO+ takes place from a molecule-ion that has been formed directly without autoionization processes.
Einar Lindholm, G. Sahlström
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Mass spectrum of tetrabutyltin
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19681. The mass spectrum of tetrabutyltin was taken on the MI-1305 and MI-1311 instruments, and a substantiation was given for the dependence of the ratio H4−xSnBux+/SnBux+ upon the number of butyl groups in the ion. The processes of decomposition of metastable ions were discussed. 2.
I. L. Agafonov +4 more
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Organic Mass Spectrometry, 1981
AbstractIrreproducibilities in the measurements of isotopic abundance in 15N labelled glycine have been related to the complex nature of chemical processes occurring during the evaporation of glycine prior to ionization.
A. S. P. Azzouz +2 more
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AbstractIrreproducibilities in the measurements of isotopic abundance in 15N labelled glycine have been related to the complex nature of chemical processes occurring during the evaporation of glycine prior to ionization.
A. S. P. Azzouz +2 more
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Journal of Inorganic and Nuclear Chemistry, 1961
Abstract The mass spectrum of stannane, SnH 4 , has been studied. Ion fragmentation patterns for both the singly and doubly charged fragments were obtained employing 70 V electrons. From appearance potential data, an estimation of the bond energies of the tin-hydrogen bond in the ion-species SnH 3 + H, SnH 2 + H, Sn + H has been made along with
H.J. Svec, F.E. Saalfeld
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Abstract The mass spectrum of stannane, SnH 4 , has been studied. Ion fragmentation patterns for both the singly and doubly charged fragments were obtained employing 70 V electrons. From appearance potential data, an estimation of the bond energies of the tin-hydrogen bond in the ion-species SnH 3 + H, SnH 2 + H, Sn + H has been made along with
H.J. Svec, F.E. Saalfeld
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The mass spectrum of mevalonolactone
Organic Mass Spectrometry, 1974AbstractThe principal fragmentation pathways of mevalonolactone are initiated by cleavage α to the hydroxyl function. Each major route has been delineated by using isotopic labelling and metastable analysis. A knowledge of this fragmentation pattern is useful for the calculation of isotopic purity and specificity in samples of mevalonolactone used as ...
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Mass spectrum of the strange dibaryon
Physical Review D, 1988Based on the diquark-cluster model, the mass spectrum of low-lying S=-1 strange dibaryons is predicted. In this scheme, two ${J}^{P}$${=0}^{\mathrm{\ensuremath{-}}}$ states with I=(1/2 and (3/2 are degenerate at the lowest-energy level, around 2.2 GeV c.m. energy.
H. Nakamura, N. Konno, H. Noya
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Physical Review, 1960
It is assumed that the $\ensuremath{\pi}$-baryon interactions are universal and the $K$-baryon interactions account for the large mass differences between baryons. If further all baryon spins are \textonehalf{} and $K$ spin is zero, ($\ensuremath{\Sigma}, \ensuremath{\Lambda}$) parity is even, the ($\ensuremath{\Sigma}, \ensuremath{\Lambda}$) mass ...
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It is assumed that the $\ensuremath{\pi}$-baryon interactions are universal and the $K$-baryon interactions account for the large mass differences between baryons. If further all baryon spins are \textonehalf{} and $K$ spin is zero, ($\ensuremath{\Sigma}, \ensuremath{\Lambda}$) parity is even, the ($\ensuremath{\Sigma}, \ensuremath{\Lambda}$) mass ...
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Organic Mass Spectrometry, 1974
AbstractThe mass spectrum of nitromethane points to rupture of the CH3NO2 bond as the dominant primary reaction, as also observed in pyrolysis, photolysis and radiolysis. Isomerization of the molecular ion to the nitrite configuration seems to contribute little in the mass spectrum of nitromethane, in contrast to those of nitrobenzene and other ...
Ellis K. Fields, Seymour Meyerson
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AbstractThe mass spectrum of nitromethane points to rupture of the CH3NO2 bond as the dominant primary reaction, as also observed in pyrolysis, photolysis and radiolysis. Isomerization of the molecular ion to the nitrite configuration seems to contribute little in the mass spectrum of nitromethane, in contrast to those of nitrobenzene and other ...
Ellis K. Fields, Seymour Meyerson
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