Changeset 7d0563e in sasview for sansview/doc/model_functions.html
- Timestamp:
- Sep 28, 2009 1:11:34 PM (15 years ago)
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sansview/doc/model_functions.html
rbeaaa8b r7d0563e 5162 5162 src="../images/html/image073.png"></span></p> 5163 5163 5164 5165 5166 <p class=MsoNormal>The form factor is,</p> 5167 5168 <p class=MsoNormal> </p> 5169 5170 <p class=MsoNormal align=center style='text-align:center'><span 5171 style='position:relative;top:15.0pt'><img border=0 width=398 height=46 5172 src="../images/html/image078.png"></span></p> 5173 5174 <p class=MsoNormal align=center style='text-align:center'><span 5175 style='position:relative;top:16.0pt'> </span></p> 5176 5177 <p class=MsoNormal>where delta<sub>T</sub> 5178 = tail length (or t_length), delta<sub>H</sub> 5179 = head thickness (or h_thickness) , <i><span style='font-family:"Arial","sans-serif"'>Δ</span>ρ</i><sub>H</sub> 5180 = SLD (headgroup) - SLD(solvent), and <i><span style='font-family:"Arial","sans-serif"'>Δ</span>ρ</i><sub>T</sub> 5181 = SLD (tail) - SLD(headgroup).</p> 5182 5183 <p class=MsoNormal>The 2D scattering intensity is calculated in the same way as 5184 1D, where the <i>q</i> vector is defined as<span style='font-size:14.0pt; 5185 position:relative;top:8.0pt'><img border=0 width=103 height=33 5186 src="../images/html/image010.png"></span><span style='font-size:14.0pt; 5187 position:relative;top:6.0pt'>.</span></p> 5188 5189 <p class=MsoNormal><span style='font-size:14.0pt;position:relative;top:6.0pt'> </span></p> 5190 5191 <p class=MsoNormal>The returned value is in units of [cm<sup>-1</sup>], on 5192 absolute scale. In the parameters, sld_tail = SLD of the tail group, and 5193 sld_head = SLD of the head group.</p> 5194 5195 <p class=MsoNormal> </p> 5196 5197 <p class=MsoNormal><sub> </sub></p> 5198 5199 <div align=center> 5200 5201 <table class=MsoTableGrid border=1 cellspacing=0 cellpadding=0 5202 style='border-collapse:collapse;border:none'> 5203 <tr style='height:18.8pt'> 5204 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5205 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5206 <p class=MsoBodyText>Parameter name</p> 5207 </td> 5208 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5209 border-left:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5210 <p class=MsoBodyText>Units</p> 5211 </td> 5212 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5213 border-left:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5214 <p class=MsoBodyText>Default value</p> 5215 </td> 5216 </tr> 5217 <tr style='height:18.8pt'> 5218 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5219 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5220 <p class=MsoBodyText>background</p> 5221 </td> 5222 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5223 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5224 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5225 <p class=MsoBodyText>cm<sup>-1</sup></p> 5226 </td> 5227 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5228 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5229 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5230 <p class=MsoBodyText>0.0</p> 5231 </td> 5232 </tr> 5233 <tr style='height:18.8pt'> 5234 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5235 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5236 <p class=MsoBodyText>sld_head</p> 5237 </td> 5238 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5239 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5240 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5241 <p class=MsoBodyText>Å<sup> -2</sup></p> 5242 </td> 5243 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5244 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5245 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5246 <p class=MsoBodyText>3e-006</p> 5247 </td> 5248 </tr> 5249 <tr style='height:18.8pt'> 5250 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5251 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5252 <p class=MsoBodyText>scale</p> 5253 </td> 5254 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5255 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5256 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5257 <p class=MsoBodyText> </p> 5258 </td> 5259 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5260 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5261 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5262 <p class=MsoBodyText>1</p> 5263 </td> 5264 </tr> 5265 <tr style='height:18.8pt'> 5266 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5267 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5268 <p class=MsoBodyText>sld_solvent</p> 5269 </td> 5270 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5271 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5272 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5273 <p class=MsoBodyText>Å<sup> -2</sup></p> 5274 </td> 5275 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5276 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5277 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5278 <p class=MsoBodyText>6e-006</p> 5279 </td> 5280 </tr> 5281 <tr style='height:18.8pt'> 5282 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5283 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5284 <p class=MsoBodyText>h_thickness</p> 5285 </td> 5286 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5287 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5288 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5289 <p class=MsoBodyText>Å</p> 5290 </td> 5291 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5292 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5293 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5294 <p class=MsoBodyText>10</p> 5295 </td> 5296 </tr> 5297 <tr style='height:18.8pt'> 5298 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5299 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5300 <p class=MsoBodyText>t_length</p> 5301 </td> 5302 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5303 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5304 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5305 <p class=MsoBodyText>Å</p> 5306 </td> 5307 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5308 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5309 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5310 <p class=MsoBodyText>15</p> 5311 </td> 5312 </tr> 5313 <tr style='height:18.8pt'> 5314 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt; 5315 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5316 <p class=MsoBodyText>sld_tail</p> 5317 </td> 5318 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5319 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5320 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5321 <p class=MsoBodyText>Å<sup> -2</sup></p> 5322 </td> 5323 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left: 5324 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt; 5325 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'> 5326 <p class=MsoBodyText>0</p> 5327 </td> 5328 </tr> 5329 </table> 5330 5331 </div> 5332 5333 <p class=MsoNormal> </p> 5334 5335 <p class=MsoNormal> </p> 5336 5337 <p class=MsoNormal align=center style='text-align:center'><img border=0 5338 width=444 height=343 src="../images/html/image079.png"></p> 5339 5340 <p class=MsoNormal align=center style='text-align:center;text-autospace:none'><b>Figure. 5341 1D plot using the default values (w/1000 data point).</b></p> 5342 5343 <p class=MsoNormal align=center style='text-align:center'> </p> 5344 5345 <p class=MsoNormal align=center style='text-align:center'> </p> 5346 5347 <p class=MsoNormal>Our model uses the form factor calculations implemented in a 5348 c-library provided by the NIST Center for Neutron Research (Kline, 2006):</p> 5349 5350 <p class=MsoNormal> </p> 5351 5352 <p class=MsoBodyText>REFERENCE</p> 5353 5354 <p class=MsoNormal>Nallet, Laversanne, and Roux, J. Phys. II France, 3, (1993) 5355 487-502.</p> 5356 5357 <p class=MsoNormal> also in J. Phys. Chem. B, 105, (2001) 5358 11081-11088.</p> 5359 5360 <p class=MsoNormal> </p> 5361 5362 <p class=MsoNormal> </p> 5363 <p class=MsoNormal> </p> 5364 5365 <p class=MsoNormal><b> </b></p> 5366 5367 <p class=MsoNormal><b> </b></p> 5368 5369 5370 <p class=MsoNormal style='margin-left:.55in;text-indent:-.3in'><b><span 5371 style='font-size:14.0pt'>2.18.<span style='font:7.0pt "Times New Roman"'> 5372 </span></span></b><b><span style='font-size:14.0pt'><a name="LamellarPSModel">LamellarPSModel</a></span></b></p> 5373 5374 <p class=MsoNormal> </p> 5375 5376 <p class=MsoNormal>This model provides the scattering intensity (<b>form factor</b> 5377 <b>*</b> <b>structure factor</b>), I(<i>q</i>), for a lyotropic lamellar phase where 5378 a random distribution in solution are assumed. </p> 5379 5380 <p class=MsoNormal> </p> 5381 5382 <p class=MsoNormal>The scattering intensity I(q) is:</p> 5383 5384 <p class=MsoNormal> </p> 5385 5386 <p class=MsoNormal align=center style='text-align:center'><span 5387 style='position:relative;top:15.0pt'><img border=0 width=133 height=46 5388 src="../images/html/image077.png"></span></p> 5389 5390 <p class=MsoNormal align=center style='text-align:center'><span 5391 style='position:relative;top:16.0pt'> </span></p> 5392 5393 5394 5164 5395 <p class=MsoNormal>The form factor is</p> 5165 5396 … … 5202 5433 style='position:relative;top:16.0pt'> </span></p> 5203 5434 5204 <p class=MsoNormal>Here d= (repeat) spacing, <span style='font-family:Symbol'>d</span>5205 = bilayer thickness, the contrast < span style='font-family:Symbol'>Dr</span> =5435 <p class=MsoNormal>Here d= (repeat) spacing, delta 5436 = bilayer thickness, the contrast <i><span style='font-family:"Arial","sans-serif"'>Δ</span>ρ</i> = 5206 5437 SLD (headgroup) - SLD(solvent), K=smectic bending elasticity, B=compression 5207 5438 modulus, and N = number of lamellar plates (n_plates).</p> … … 5391 5622 <p class=MsoNormal> </p> 5392 5623 5624 5625 5393 5626 <p class=MsoNormal> </p> 5394 5627 … … 5399 5632 5400 5633 <p class=MsoNormal style='margin-left:.55in;text-indent:-.3in'><b><span 5401 style='font-size:14.0pt'>2.1 8.<span style='font:7.0pt "Times New Roman"'> 5402 </span></span></b><b><span style='font-size:14.0pt'><a name="LamellarPS Model">LamellarPSModel</a></span></b></p>5634 style='font-size:14.0pt'>2.19.<span style='font:7.0pt "Times New Roman"'> 5635 </span></span></b><b><span style='font-size:14.0pt'><a name="LamellarPSHGModel">LamellarPSHGModel</a></span></b></p> 5403 5636 5404 5637 <p class=MsoNormal> </p> … … 5433 5666 style='position:relative;top:16.0pt'> </span></p> 5434 5667 5435 <p class=MsoNormal>where <span style='font-family:Symbol'>d<sub>T</sub></span>5436 = tail length (or t_length), <span style='font-family:Symbol'>d<sub>H</sub></span>5437 = heasd thickness (or h_thickness) , <span style='font-family:Symbol'>Dr</span><sub>H</sub>5438 = SLD (headgroup) - SLD(solvent), and <span style='font-family:Symbol'>Dr</span><sub>T</sub>5439 = SLD (tail) - SLD(headgroup).</p>5440 5441 <p class=MsoNormal>The 2D scattering intensity is calculated in the same way as5442 1D, where the <i>q</i> vector is defined as<span style='font-size:14.0pt;5443 position:relative;top:8.0pt'><img border=0 width=103 height=335444 src="../images/html/image010.png"></span><span style='font-size:14.0pt;5445 position:relative;top:6.0pt'>.</span></p>5446 5447 <p class=MsoNormal><span style='font-size:14.0pt;position:relative;top:6.0pt'> </span></p>5448 5449 <p class=MsoNormal>The returned value is in units of [cm<sup>-1</sup>], on5450 absolute scale. In the parameters, sld_tail = SLD of the tail group, and5451 sld_head = SLD of the head group.</p>5452 5453 <p class=MsoNormal> </p>5454 5455 <p class=MsoNormal><sub> </sub></p>5456 5457 <div align=center>5458 5459 <table class=MsoTableGrid border=1 cellspacing=0 cellpadding=05460 style='border-collapse:collapse;border:none'>5461 <tr style='height:18.8pt'>5462 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5463 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5464 <p class=MsoBodyText>Parameter name</p>5465 </td>5466 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5467 border-left:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5468 <p class=MsoBodyText>Units</p>5469 </td>5470 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5471 border-left:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5472 <p class=MsoBodyText>Default value</p>5473 </td>5474 </tr>5475 <tr style='height:18.8pt'>5476 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5477 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5478 <p class=MsoBodyText>background</p>5479 </td>5480 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5481 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5482 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5483 <p class=MsoBodyText>cm<sup>-1</sup></p>5484 </td>5485 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5486 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5487 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5488 <p class=MsoBodyText>0.0</p>5489 </td>5490 </tr>5491 <tr style='height:18.8pt'>5492 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5493 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5494 <p class=MsoBodyText>sld_head</p>5495 </td>5496 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5497 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5498 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5499 <p class=MsoBodyText>Å<sup> -2</sup></p>5500 </td>5501 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5502 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5503 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5504 <p class=MsoBodyText>3e-006</p>5505 </td>5506 </tr>5507 <tr style='height:18.8pt'>5508 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5509 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5510 <p class=MsoBodyText>scale</p>5511 </td>5512 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5513 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5514 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5515 <p class=MsoBodyText> </p>5516 </td>5517 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5518 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5519 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5520 <p class=MsoBodyText>1</p>5521 </td>5522 </tr>5523 <tr style='height:18.8pt'>5524 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5525 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5526 <p class=MsoBodyText>sld_solvent</p>5527 </td>5528 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5529 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5530 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5531 <p class=MsoBodyText>Å<sup> -2</sup></p>5532 </td>5533 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5534 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5535 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5536 <p class=MsoBodyText>6e-006</p>5537 </td>5538 </tr>5539 <tr style='height:18.8pt'>5540 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5541 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5542 <p class=MsoBodyText>h_thickness</p>5543 </td>5544 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5545 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5546 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5547 <p class=MsoBodyText>Å</p>5548 </td>5549 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5550 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5551 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5552 <p class=MsoBodyText>10</p>5553 </td>5554 </tr>5555 <tr style='height:18.8pt'>5556 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5557 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5558 <p class=MsoBodyText>t_length</p>5559 </td>5560 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5561 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5562 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5563 <p class=MsoBodyText>Å</p>5564 </td>5565 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5566 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5567 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5568 <p class=MsoBodyText>15</p>5569 </td>5570 </tr>5571 <tr style='height:18.8pt'>5572 <td width=143 valign=top style='width:107.0pt;border:solid windowtext 1.0pt;5573 border-top:none;padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5574 <p class=MsoBodyText>sld_tail</p>5575 </td>5576 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5577 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5578 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5579 <p class=MsoBodyText>Å<sup> -2</sup></p>5580 </td>5581 <td width=143 valign=top style='width:107.0pt;border-top:none;border-left:5582 none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;5583 padding:0in 5.4pt 0in 5.4pt;height:18.8pt'>5584 <p class=MsoBodyText>0</p>5585 </td>5586 </tr>5587 </table>5588 5589 </div>5590 5591 <p class=MsoNormal> </p>5592 5593 <p class=MsoNormal> </p>5594 5595 <p class=MsoNormal align=center style='text-align:center'><img border=05596 width=444 height=343 src="../images/html/image079.png"></p>5597 5598 <p class=MsoNormal align=center style='text-align:center;text-autospace:none'><b>Figure.5599 1D plot using the default values (w/1000 data point).</b></p>5600 5601 <p class=MsoNormal align=center style='text-align:center'> </p>5602 5603 <p class=MsoNormal align=center style='text-align:center'> </p>5604 5605 <p class=MsoNormal>Our model uses the form factor calculations implemented in a5606 c-library provided by the NIST Center for Neutron Research (Kline, 2006):</p>5607 5608 <p class=MsoNormal> </p>5609 5610 <p class=MsoBodyText>REFERENCE</p>5611 5612 <p class=MsoNormal>Nallet, Laversanne, and Roux, J. Phys. II France, 3, (1993)5613 487-502.</p>5614 5615 <p class=MsoNormal> also in J. Phys. Chem. B, 105, (2001)5616 11081-11088.</p>5617 5618 <p class=MsoNormal> </p>5619 5620 <p class=MsoNormal> </p>5621 5622 <p class=MsoNormal> </p>5623 5624 <p class=MsoNormal><b> </b></p>5625 5626 <p class=MsoNormal><b> </b></p>5627 5628 5629 <p class=MsoNormal style='margin-left:.55in;text-indent:-.3in'><b><span5630 style='font-size:14.0pt'>2.19.<span style='font:7.0pt "Times New Roman"'> 5631 </span></span></b><b><span style='font-size:14.0pt'><a name="LamellarPSHGModel">LamellarPSHGModel</a></span></b></p>5632 5633 <p class=MsoNormal> </p>5634 5635 <p class=MsoNormal>This model provides the scattering intensity (<b>form factor</b>5636 <b>*</b> <b>structure factor</b>), I(<i>q</i>), for a lyotropic lamellar phase where5637 a random distribution in solution are assumed. The SLD of the head region is5638 taken to be different from the SLD of the tail region.</p>5639 5640 <p class=MsoNormal> </p>5641 5642 <p class=MsoNormal>The scattering intensity I(q) is:</p>5643 5644 <p class=MsoNormal> </p>5645 5646 <p class=MsoNormal align=center style='text-align:center'><span5647 style='position:relative;top:15.0pt'><img border=0 width=133 height=465648 src="../images/html/image077.png"></span></p>5649 5650 <p class=MsoNormal align=center style='text-align:center'><span5651 style='position:relative;top:16.0pt'> </span></p>5652 5653 <p class=MsoNormal>The form factor is,</p>5654 5655 <p class=MsoNormal> </p>5656 5657 <p class=MsoNormal align=center style='text-align:center'><span5658 style='position:relative;top:15.0pt'><img border=0 width=398 height=465659 src="../images/html/image078.png"></span></p>5660 5661 <p class=MsoNormal align=center style='text-align:center'><span5662 style='position:relative;top:16.0pt'> </span></p>5663 5664 5668 <p class=MsoNormal>The structure factor is</p> 5665 5669 … … 5691 5695 <p class=MsoNormal> </p> 5692 5696 5693 <p class=MsoNormal>where <span style='font-family:Symbol'>d<sub>T</sub></span>5694 = tail length (or t_length), <span style='font-family:Symbol'>d<sub>H</sub></span>5695 = hea sd thickness (or h_thickness) , <span style='font-family:Symbol'>Dr</span><sub>H</sub>5696 = SLD (headgroup) - SLD(solvent), and < span style='font-family:Symbol'>Dr</span><sub>T</sub>5697 <p class=MsoNormal>where delta<sub>T</sub> 5698 = tail length (or t_length), delta<sub>H</sub> 5699 = head thickness (or h_thickness) , <i><span style='font-family:"Arial","sans-serif"'>Δ</span>ρ</i><sub>H</sub> 5700 = SLD (headgroup) - SLD(solvent), and <i><span style='font-family:"Arial","sans-serif"'>Δ</span>ρ</i><sub>T</sub> 5697 5701 = SLD (tail) - SLD(headgroup). Here d= (repeat) spacing, K=smectic bending 5698 5702 elasticity, B=compression modulus, and N = number of lamellar plates
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