def get_dens(self): """Gets estimated layer density from user. Could make this a calc from xtal struct in future... """ user_alert('Layer Density:\nUsed solely to convert thicknesses in ' 'ug/cm^2 to Angstroms; has no effect on the results.') rho = get_nums('Approximate density (g/cm^3):', 25, 0) return rho
def setup_vars(self): """Get element data""" # Get element data from tables or calculation # Electron shell e.g. K, L1, M1, N1 self.shell = self.get_shell() with open('atomic_data.txt', 'r') as data_file: for row in data_file: data = row.split("\t") if int(data[0]) == 0: cols = data if self.z == int(data[0]): # Element Mass self.mass = float(data[cols.index('Mass')]) edge = float(data[cols.index(self.shell)]) # Absorption Edge [KeV] self.edge = edge if edge > 0.0 else 50000.0 # Coster-Kronig Coefficients # self.ck = float( # data[cols.index(get_options('ck (c12, c13, c23):', # ('c12', 'c13', 'c23'), # casesen = 'Lower' # ))]) xray = float(data[cols.index(self.line)]) # X-Ray Emmision Line Energy [KeV] if xray > 0.0: self.xray = xray else: 50000.0 user_alert('X-Ray emmision line not valid for' 'element %s\n X-Ray energy set to 50MeV.' '\nPlease select another line to prevent' 'anomalous calculations!' %self.name) # Fluorescence Yields self.omega = self.get_omega() # Number of electrons in the ionized shell. self.znl = self.get_znl() # JUMP Ratios self.rjump = self.get_rjump() # EFFective Fluorescence YieLD self.effyld = self.get_effyld() # TRaNSition PROBability of line after shell ionization self.trnsprob = self.get_trnsprob()
def user_input(self, volt): z, name = get_options('Please enter Element Symbol:', 'els', count=True) # make sure the selected line is valid while True: line = get_options('Please enter Element X-Ray Line ' '(Ka, Lg2, etc.):', 'lines') xray = get_data(z, line) if xray > 0: break user_alert('Invalid line for this element; try again:') opt = self.get_opt() if volt is None: volt = get_nums('Accelerating voltage for this element?:', 50, 0) return name, line, z, volt, opt
def Mac(el1, el2): """Calculation of Mass the Absorption Coefficient of an impinging X-Ray from el1 on el2. This calc needs to be checked. See above refs""" if el1.z == 5 and el2.z == 40: """ B xray interacting with Zr ??? weird""" xmu = 8270.0 iflag = 2 ie = "" cutoff = 0 xray = el1.xray z = el2.z mass = el2.mass # calculate 'c' parameter if xray > get_data(z, 'K'): if z < 6: c = -2.87536e-4 + 1.808599e-3 * z else: c = (5.253e-3 + 1.33257e-3 * z + -7.5937e-5 * z**2 + 1.69357e-6 * z**3 + -1.3975e-8 * z**4) elif xray < get_data(z, 'L3'): c = (-9.24e-5 + 1.41478e-4 * z + -5.24999e-6 * z**2 + 9.85296e-8 * z**3 + -9.07306e-10 * z**4 + 3.19254e-12 * z**5) if xray > get_data(z, 'L1'): c = c elif xray > get_data(z, 'L2'): c = c * 0.858 else: c = c*(0.8933 - z*8.29e-3 + z**2*6.38e-5) elif xray > get_data(z, 'M1'): if z < 30: c = (1.889757e-2 + -1.8517159e-3 * z + 6.9602789e-5 * z**2 + -1.1641145e-6 * z**3 + 7.2773258e-9 * z**4) else: c = (3.0039e-3 + -1.73663566e-4 * z + 4.0424792e-6 * z**2 + -4.0585911e-8 * z**3 + 1.497763e-10 * z**4) elif xray > get_data(z, 'M5'): c1 = (7.7708e-5 + -7.83544e-6 * z + 2.209365e-7 * z**2 + -1.29086e-9 * z**3) c2 = (1.406 + 0.0162 * z + -6.561e-4 * z**2 + 4.865e-6 * z**3) c3 = (0.584 + 0.01955 * z + -1.285e-4 * z**2) c4 = (1.082 + 1.366e-3 * z) c5 = (1.6442 + -0.0480 * z + 4.0664e-4 * z**2) if xray > get_data(z, 'M2'): c = c1*c2*c3 elif xray > get_data(z, 'M3'): c = c1*c2*c4 elif xray > get_data(z, 'M4'): c = c1*c2*0.95 else: # M5 ie = 'M5' c = c1*c2*c5 else: c = 1.08*(4.3156e-3 + -1.4653e-4 * z + 1.707073e-6 * z**2 + -6.69827e-9 * z**3) if xray < get_data(z, 'N1'): cutoff = ((0.252*z - 31.1812)*z + 1042.)/1000.0 ie = 'N1' # calculate 'n' parameter if xray > get_data(z, 'K'): if z < 6: n = (3.34745 + 0.02652873 * z + -0.01273815 * z**2) else: n = (3.112 + -0.0121 * z) elif xray > get_data(z, 'L3'): n = (2.7575 + 1.889e-3 * z + -4.982e-5 * z**2) elif xray > get_data(z, 'M1'): n = (0.5385 + 0.084597 * z + -1.08246e-3 * z**2 + 4.4509e-6 * z**3) elif xray > get_data(z, 'M5'): n = 3.0 - 0.004*z else: n = 0.3736 + 0.02401*z # calculate 'a' parameter if xray > get_data(z, 'K'): if z < 6: a = (24.4545 + 155.6055 * z + -14.15422 * z**2) else: a = (47.0 * z + 6.52 * z**2 + -0.152624 * z**3) elif xray > get_data(z, 'L3'): a = (17.8096 * z + 0.067429 * z**2 + 0.01253775 * z**3 + -1.16286e-4 * z**4) elif xray > get_data(z, 'M1'): a = (10.2575657 * z + -0.822863477 * z**2 + 2.63199611e-2 * z**3 + -1.8641019e-4 * z**4) elif xray > get_data(z, 'M5'): a = (4.62 * z + -0.04 * z**2) else: a = (19.64 * z + -0.61239 * z**2 + 5.39309e-3 * z**3) # calculate 'b' parameter if xray > get_data(z, 'K'): if z < 6: b = -103. + 18.2*z else: b = 0. elif xray > get_data(z, 'L3'): b = 0. elif xray > get_data(z, 'M1'): if z < 61: b = (5.654 * z + -0.536839169 * z**2 + 0.018972278 * z**3 + -1.683474e-4 * z**4) else: b = (-1232.4022 * z + 51.114164 * z**2 + -0.699473097 * z**3 + 3.1779619e-3 * z**4) elif xray > get_data(z, 'M5'): b = (2.51 + (-0.052) * z + 3.78e-4 * z**2) * get_data(z, 'M4') * 1000. else: b = -113. + 4.5*z if xray > get_data(z, 'N1'): qq = (-xray*1000.+b)/a if qq > 88.: qq = 88. elif qq < -88.: qq = -88. xmu = c * z**4 / mass * ((12.397 / xray)**n) * (1. - np.exp(qq)) if xmu < 0.0: mess = '!!! negative mac !!!' else: xmu = (((12.397 / xray)**n) * c * z**4 / mass * (xray - cutoff) / (1.08 * get_data(z, 'N1'))) if xray < 1.1 * cutoff: mess = '!!! Ec<1.1xcutoff !!!' elif xray - cutoff < 0.02 and xray - cutoff > -0.005: mess = '!!! close to edge !!!' else: mess = 'Good!!' if ie == 'M5': mess += '!!!M4>Ec>M5 edge & Zab<70!!!' if el2.mass >= 70: mess = 'Good!!' if ie == 'N1': mess += '!!! Ec below M5 edge !!!' if xmu < 0.0 and ie == 'N1': mess = '!!!neg. mac & Ec<M5edge!!!' user_alert(mess + '\nemiter=%s %s; absorber=%s; mu=%.4g' % (el1.name, el1.line, el2.name, xmu)) if xmu <= 0.0: xmu1 = xmu xmu = get_nums('MAC is negative; Enter a value for this MAC :') user_alert('emiter=%s %s; absorber=%s;' 'mu changed from %.4g to %.4g' % (el1.name, el1.line, el2.name, xmu1, xmu)) return xmu