Results 161 to 170 of about 64,037 (214)

Simple Pulsed Nuclear-Magnetic Resonance Spectrometer

American Journal of Physics, 1966
A relatively simple, incoherent, variable frequency pulsed nuclear-magnetic resonance spectrometer is described. It uses mostly commercial units and can examine materials with T2's greater than 50 μsec.
I. J. Lowe, D. Whitson
openaire   +1 more source

Pulsed nuclear magnetic resonance study of39K within Halobacteria

The Journal of Membrane Biology, 1977
The 39K contents of isolated pellets and supernatant solutions from suspensions of Halobacterium halobium were studied at 21-22 degrees C by pulsed NMR spectroscopy. The rates of transverse relaxation were measured directly from the free induction decay (FID). The rate of longitudinal relaxation was measured by studying the FID after pairs of pulses of
M, Shporer, M M, Civan
openaire   +2 more sources

Pulsed nuclear magnetic resonance magnetometer

Optoelectronics, Instrumentation and Data Processing, 2015
A precision magnetometer based on pulsed nuclear magnetic resonance (NMR) is described. This magnetometer measures constant magnetic fields with an absolute error not more than 10−6 and a resolution of up to 10−7. The use of modern digital technologies, such as FPGA, made it possible to significantly accelerate and optimize NMR signals.
openaire   +1 more source

Inexpensive Pulsed Nuclear Magnetic Resonance Spectrometer

American Journal of Physics, 1971
A compact and inexpensive fixed frequency pulsed nuclear magnetic resonance spectrometer is described. The apparatus is entirely self-contained and all units are bench made.
openaire   +1 more source

Pulsed Nuclear Magnetic Resonance in Rotating Solids

Physical Review, 1967
Pulsed nuclear-magnetic-resonance measurements have been made on rapidly rotating solid samples. Transient induction signals were observed for ${\mathrm{P}}^{31}$ and ${\mathrm{Al}}^{27}$ nuclei in ${\mathrm{Mg}}_{3}$${\mathrm{P}}_{2}$, ${\mathrm{Zn}}_{3}$${\mathrm{P}}_{2}$, and AlP powders.
H. Kessemeier, R. E. Norberg
openaire   +1 more source

Acoustic ringing effects in pulsed nuclear magnetic resonance probes

Review of Scientific Instruments, 1978
The troublesome spurious ringing phenomenon found in pulsed nuclear magnetic resonance probes is explained in terms of the electromagnetic generation and detection of ultrasonic waves. A few techniques for eliminating this problem are discussed.
M L, Buess, G L, Petersen
openaire   +2 more sources

Simple Bridge for Pulsed Nuclear Magnetic Resonance

Review of Scientific Instruments, 1967
An asymmetrical rf bridge for pulsed magnetic resonance experiments is described. The balancing adjustments, which can be made quickly and easily, ensure a proper impedance match to transmitter and receiver. The bridge is particularly well suited for pure nuclear quadrupole resonance experiments.
K. R. Jeffrey, R. L. Armstrong
openaire   +1 more source

Transition-Selective Pulses in Zero-Field Nuclear Magnetic Resonance

The Journal of Physical Chemistry A, 2016
We use low-amplitude, ultralow frequency pulses to drive nuclear spin transitions in zero and ultralow magnetic fields. In analogy to high-field NMR, a range of sophisticated experiments becomes available as these allow narrow-band excitation. As a first demonstration, pulses with excitation bandwidths 0.5-5 Hz are used for population redistribution ...
Tobias F. Sjolander, Michael C. D. Tayler, Jonathan P. King, Dmitry Budker, Alexander Pines   +4 more
openaire   +2 more sources

Pulsed nuclear magnetic resonance in iron.

2011
A pulsed N.M.R. spectrometer capable of operating over the frequency range 40 Mhz. to 100 Mhz. has been constructed. It was used to observe the nuclear resonance of Fe⁵⁷ in unenriched iron powder at 4.2°K. and 77°K.. Some preliminary experiments were performed and the results of these experiments are in good agreement with other reported results.
openaire   +1 more source

Pulsed nuclear magnetic resonance signals in magnetically ordered materials

Journal of Applied Spectroscopy, 2008
We have obtained an analytical expression for nuclear precession and nuclear echo signals generated in magnetically ordered materials upon resonant excitation of the nuclear subsystem by two pulses of identical amplitude but different durations. We show that in a nuclear subsystem with inhomogeneous broadening of the spectroscopic transition and an ...
V. S. Kuz’min, V. M. Kolesenko, E. P. Borbotko   +2 more
openaire   +1 more source