# na-shifted-echo-amplitude-selective-filtering-p2.in # approach: filtering the desired coherences (-3Q and +3Q) after the first pulse # and (+1Q and -3Q) after the second pulse # spin-3/2 echo and antiecho amplitude optimization # versus the second-pulse duration # in three-pulse shifted-echo amplitude-modulated 3Q-MAS sequence, # the first-pulse duration p1 = 4 micro seconds # the third-pulse duration p3 = 2 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 9300 variable p1 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-3 3} matrix set 2 coherence {1 -3} pulse $par(p1) $par(rf) x store 10 reset acq -y for {set i 1} {$i < $par(np)} {incr i} { reset prop 10 filter 1 pulse [expr ($i)*$par(tsw)] $par(rf) x filter 2 pulse $par(p3) $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 # 0.0950338179 -2.26877901e-17 # 0.0803502684 -2.01541781e-17 # 0.0616263491 -1.74175799e-17 # 0.0443536913 -1.8121111e-17 # 0.0328437692 -1.56409667e-17 # 0.0292062894 -1.88673303e-17 # 0.0331815096 -2.63317667e-17 # 0.0426536565 -2.21505157e-17 # 0.0544896236 -1.63535235e-17 # 0.0653827173 -5.6973286e-18 # 0.0725328467 -2.04661017e-17 # 0.0741243331 -1.77771327e-17 # 0.06959953 -2.15643819e-17 # 0.0596997564 -1.55975989e-17 # 0.0462350746 -1.68790346e-17 # 0.0316025874 1.41053879e-17 # END