GB1334819A - Method of recording spin resonance spectra - Google Patents

Method of recording spin resonance spectra

Info

Publication number
GB1334819A
GB1334819A GB1334819DA GB1334819A GB 1334819 A GB1334819 A GB 1334819A GB 1334819D A GB1334819D A GB 1334819DA GB 1334819 A GB1334819 A GB 1334819A
Authority
GB
United Kingdom
Prior art keywords
pulses
spin resonance
excited
generator
interferograms
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spectrospin AG
Original Assignee
Spectrospin AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Spectrospin AG filed Critical Spectrospin AG
Publication of GB1334819A publication Critical patent/GB1334819A/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/46—NMR spectroscopy
    • G01R33/4616—NMR spectroscopy using specific RF pulses or specific modulation schemes, e.g. stochastic excitation, adiabatic RF pulses, composite pulses, binomial pulses, Shinnar-le-Roux pulses, spectrally selective pulses not being used for spatial selection

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

1334819 Spin resonance spectrometers SPECTROSPIN A G 30 March 1972 [28 May 1971] 15214/72 Heading G1N In a spin resonance spectrometer of the type in which interferograms are averaged and the resonance frequencies determined by Fourier Analysis, the sample spins are excited by two sets of R.F. pulses differing in phase by 180 degrees, at least approximately equal numbers of pulses from each set being used, and the averaged interferogram is obtained by adding the interferograms excited by the pulses of one set to those excited by the pulses of the other set with the sign reversed. Thus, interference signals caused by switching, cancel out. Pulses from the two sets may alternate, singly, in groups of equal number of pulses, or stochastically. The invention may be applied to spin echo spectroscopy and "deft" and "seft" cycles are explained with reference to Fig. 4 (not shown). In Fig.1, R.F. from R.F. generator 22 is modulated at 13 by a train of pulses (31) of alternate polarity from a pulse generator 23. Spin resonance signals from the sample 12 are amplified in a pre-amplifier 14 gated on by pulses (33) from generator 23 in the intervals between the R.F. pulses (32) applied to excite the spins. The output from amplifier 14 is heterodyned in a mixer 15 with the output of a local oscillator 24, amplified at 16 and phase detected at 17. The detected signals pass through a low pass filter 18 to a mean value converter 19 which receives pulses (34) from pulse generator 23 to determine the sign for each signal. 20 denotes a Fourier transformer.
GB1334819D 1972-03-30 1972-03-30 Method of recording spin resonance spectra Expired GB1334819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1521472 1972-03-30

Publications (1)

Publication Number Publication Date
GB1334819A true GB1334819A (en) 1973-10-24

Family

ID=10055057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1334819D Expired GB1334819A (en) 1972-03-30 1972-03-30 Method of recording spin resonance spectra

Country Status (1)

Country Link
GB (1) GB1334819A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6208136B1 (en) 1995-02-24 2001-03-27 Btg International Limited Method of and apparatus for nuclear quadrupole resonance testing a sample, and pulse sequence for exciting nuclear quadrupole resonance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6208136B1 (en) 1995-02-24 2001-03-27 Btg International Limited Method of and apparatus for nuclear quadrupole resonance testing a sample, and pulse sequence for exciting nuclear quadrupole resonance

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Legal Events

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee