spin-5/2 Hahn-echo amplitudessolidsSpin- ja:math Hahn echoes, generated by two in-phase pulses separated by a delay τ 2 greater than or equal to twice the duration of the FID, T FID , are derived by taking into account the first-order quadrupole interaction throughout the experiment, ...
1993). The 19F to 29Si experiment was found to be not as efficient as a 1H to 29Si cross–polarisation because the dipolar interactions between F and Si are weaker due to the lower magnetogyric ratio of 19F by comparison with 1H. Nevertheless, this cross–polarisation experiment can be us...
(Obviously, this is a very powerful command, so do not experiment with it.) rm data[123] rm * The first command deletes the files data1, data2 and data3 in the working directory. The second command is a powerful one: it deletes all the files in your working directory, except ...