# na-zfilter-amplitude-p2half-filtering-p3.in # approach: filtering the desired coherences (-3Q and +3Q) after the first pulse # and (2Q, 0Q, and -2Q) 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 rep10 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 {2 0 -2} 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 # 0.296992818 -3.79504757e-16 # 0.155388552 -5.02898633e-16 # -0.326206023 -4.36716659e-16 # -0.936828565 -5.87878062e-16 # -1.45040583 -5.22611926e-16 # -1.70784554 -2.6693133e-16 # -1.65153612 -2.11422723e-16 # -1.31087705 -1.54719161e-16 # -0.762539947 -2.95547866e-17 # -0.0947291876 1.25167317e-16 # 0.608223358 1.46527179e-16 # 1.26361142 3.14803169e-16 # 1.78465683 3.67880537e-16 # 2.08406812 3.71436744e-16 # 2.08951649 5.40017452e-16 # 1.76413725 6.2881743e-16 # END