Patent ID: 6278277
Filing Date: 2001-08-21
Classification: G01R

Abstract:
A probe head for nuclear magnetic resonance measurements, wherein at least two different kinds of nuclei are excited by means of radio frequency irradiation within a constant magnetic field, the probe head comprising:a pick-up coil cooperating with a sample,said pick-up coil being connected to a first input for feeding a signal of a higher radio frequency to said pick-up coil for exciting a first kind of nuclei and/or for receiving from said pick-up coil a resonance signal emitted by said nuclei of said first kind of nuclei,said coil being, further, connected to a second input for feeding a signal of a lower radio frequency to said pick-up coil for exciting a second kind of nuclei and/or for receiving from said pick-up coil a resonance signal emitted by said nuclei of said second kind of nuclei,a radio frequency line being also connected to said pick-up coil, said radio frequency line having an electrical length corresponding to an integer multiple of a quarter wave length of said higher radio frequency; anda series capacitor being interconnected between said radio frequency line and said pick-up coil.