Erroneous results have been reported when using SpinDynamica v3.6.x with Mathematica version 13. This is very surprising behaviour since Mathematica should be backwards compatible. This has been pinned down to a surprising inconsistency in the handling of SparseArray objects between Mathematica versions 12 and 13.  A bug report has been submitted to wolfram.com. SpinDynamica v3.7 …

#SpinDynamica is now on Twitter! Thanks to Laurynas Dagys and Mohamed Sabba.

ANZMAG (The Australia-New Zealand Magnetic Resonance society) recorded a series of videos on SpinDynamica by Malcolm Levitt. They have kindly made these available on YouTube.

Welcome to Christian Bengs who has taken over administration over this site. Christian has already done a lot of excellent coding as part of our new release of SpinDynamica (v3.0.1) and our first SpinDynamica publication. It’s great to have his help! So many thanks to Christian, and enjoy the new version of SpinDynamica! Malcolm

Our first article on SpinDynamica has just been accepted for publication: DOI 10.1002/mrc.4642 Thanks to Christian Bengs for helping write this article! Please cite this article if you published results obtained with SpinDynamica!

The attached code may be used for simple 2D simulations using SpinDynamica. It is not completely general but should do for many purposes. More general code will be included in SpinDynamica in future. This example has also been posted on the forum, where you may also post responses.               …

SpinDynamica is used to treat the relaxation of long-lived singlet order in monodeuterated methyl groups and uses an effective CH2D geometry to explain experimentally observed results. Download the paper and the SpinDynamica notebook.

On request, the popular Mathematica code CandRsymmetries has been resurrected as a new SpinDynamica add-on called SymmetryBasedRecouplingAnalysis. It may be found under AddOns or here.

Q & A with Malcolm Levitt on Wolfram Blog: here

In a recently accepted JACS paper, Russ Bowers and co-workers investigate parahydrogen reactions on nanoparticles, using 6-spin-1/2 SpinDynamica simulations. See: http://pubs.acs.org/doi/abs/10.1021/ja511476n

This example file illustrates the spin dynamics of a spin-3/2 system in the presence of weak and strong rf fields. Selective manipulations of the central and satellite transitions are illustrated, including the use of cosine-modulated fields to excite the satellite transitions. Download here: SpinThreeHalfDynamics or here.  

The routine EnsembleAverage may be used to generate arbitrary distributions of nuclear spin interactions. In an example posted on the forum, I used EnsembleAverage to generate the spectrum of 133Cs (I=7/2) in an inhomogeneous gel. The same notebook includes a simulation of quadrupolar echoes in spin-7/2 with curious fractional timings.

At the present time, the case of spin systems experiencing chemical exchange cannot be handled entirely within the architecture of SpinDynamica. However, it is possible to build upon SpinDynamica to handle chemical exchange. The notebook http://blog.soton.ac.uk/spindynamica/files/2025/04/TwoSiteExchangeAB.nb_.zip shows how to simulate an AB spin system of two spins-1/2 experiencing chemical exchange between inequivalent sites. The resulting lineshapes …

A SpinDynamica demonstration of single-scan 2D spectroscopy using a spatial encoding of the spin interaction. Routines used: Signal1D, EnsembleAverage, ShapeFunction Programmed by Dr. Jean-Nicolas Dumez Attached File : ufcosy.nb

SpinDynamica code for the interactive visualization of Euler angles is available here: EulerVisualization

A notebook for producing 3D animations of composite pulses is available here: https://www.dropbox.com/s/yam19kdjo8qtwva/CompositePulseAnimation.nb The plot shown is a single frame from one such animation.

DeVience, Walsworth and Rosen have used SpinDynamica to develop a new method for generating long-lived nuclear singlet order, and to plot the trajectories of the spin operators during the pulse sequence. See http://arxiv.org/abs/1307.0832

Andreas Brinkmann has used SpinDynamica to simulate 14N overtone NMR. See http://dx.doi.org/10.1063/1.4775592

    Download the code here: RelaxationAndPrecession.nb

SpinDynamica code: Pake.nb