# na-zfilter-amplitude-filtering-p3.in # approach: filtering the desired coherences (-3Q and +3Q) after the first pulse # and (0Q) after the second pulse # spin-3/2 echo and antiecho amplitude optimization # versus the third-pulse duration # in three-pulse z-filtered amplitude-modulated 3Q-MAS sequence, # the first-pulse duration p1 = 4 micro seconds # the second-pulse duration p2 = 4 micro seconds spinsys { channels 23Na nuclei 23Na quadrupole 1 1 1e6 1 0 0 0 } par { spin_rate 5000 variable tsw 0.25 sw 1.0e6/tsw np 17 crystal_file rep100 gamma_angles 10 proton_frequency 800e6 start_operator 24*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 93000 variable p1 4 variable p2 4 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-3 3} matrix set 2 coherence {0} acq -y pulse $par(p1) $par(rf) x filter 1 pulse $par(p2) $par(rf) x filter 2 for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf3) x acq -y } } proc main {} { global par fsave [fsimpson] $par(name).fid puts "Larmor frequency (Hz) of 23Na: " puts [resfreq 23Na $par(proton_frequency)] } # SIMP # NP=17 # SW=4000000 # TYPE=FID # DATA # 0 0 # 0.128152817 -2.15885783e-17 # 0.159315603 -2.40661429e-17 # 0.0330417153 -4.86105077e-18 # -0.252189425 4.45862971e-17 # -0.638994928 1.24552589e-16 # -1.03245949 2.22738605e-16 # -1.33358769 2.58759715e-16 # -1.47195351 2.90459068e-16 # -1.42649128 2.67284796e-16 # -1.22892036 2.47130109e-16 # -0.950677072 1.88745728e-16 # -0.679059061 1.39516466e-16 # -0.490561435 1.21951826e-16 # -0.429254587 1.29938378e-16 # -0.496099602 1.50482208e-16 # -0.651823974 1.89663013e-16 # END