Sample head for nuclear resonance measurements
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 20, 1993
Grant Date -
N/A
app pub date -
Jan 17, 1991
filing date -
Jan 25, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sample head for performing nuclear magnetic resonance measurements on a first kind of nuclei (.sup.1 H) and, further, on a second (.sup.15 N) or a third (.sup.31 P) kind of nuclei within a magnetic field (B) is disclosed. A measuring coil coacts with a sample under analysis and generates a nuclear magnetic resonance within the sample or receives a nuclear magnetic resonance signal from the sample. Terminals are provided for transmitting to or receiving from the measuring coil high-frequency signals having frequencies corresponding to the particular nuclear magnetic resonance frequency of the specific kinds of nuclei (.sup.1 H, .sup.15 N, .sup.31 P), respectively. A high-frequency line is connected to the measuring coil at one end thereof. The line has an electric length which is an integer multiple of a quarter wavelength corresponding to the first, higher frequency. Switching means are associated to the line for switching its electrical length according to two distinct modes of operations where the second and the third, lower frequencies have different values below the first, higher frequency. By actuating the switching means, the line acts as an inductance or as a capacitance, respectively, connected in series with the measuring coil.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully