# na-shifted-echo-echo-selective-phase-filtering-p1.in # approach: filtering the desired coherence (-3Q) after the first pulse # and (1Q and -3Q) after the second pulse # spin-3/2 echo amplitude optimization # versus the first-pulse duration # in three-pulse shifted-echo phase-modulated -3Q-MAS sequence, # the second-pulse duration p2 = 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 48*I1z detect_operator I1c verbose 1101 variable rf 90000 variable rf3 9300 variable p2 4 variable p3 2 } proc pulseq {} { global par maxdt $par(tsw) matrix set 1 coherence {-3} matrix set 2 coherence {1 -3} acq -y for {set i 1} {$i < $par(np)} {incr i} { pulse $par(tsw) $par(rf) x store 2 filter 1 pulse $par(p2) $par(rf) x filter 2 pulse $par(p3) $par(rf3) x acq -y reset prop 2 } } 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 # 2.50905369e-06 -4.1136915e-19 # 7.70840597e-05 3.20519065e-19 # 0.000546195585 -7.46434862e-20 # 0.00208906424 -4.78629267e-19 # 0.00563438472 -5.07489866e-19 # 0.0120829628 -2.96628999e-18 # 0.0219921207 -9.60832736e-18 # 0.0353698237 -1.12654528e-17 # 0.0516660057 -1.4323457e-17 # 0.0699498487 -1.52745993e-17 # 0.0891804592 -2.76910595e-17 # 0.108453956 -3.03550379e-17 # 0.127145254 -4.1210916e-17 # 0.14492772 -4.83792197e-17 # 0.161708271 -5.25028526e-17 # 0.177534498 -1.26306245e-17 # END