r7149 - /branches/rdc_analysis/physical_constants.py -- August 11, 2008 - 18:12

Author: bugman
Date: Mon Aug 11 15:41:13 2008
New Revision: 7149

URL: http://svn.gna.org/viewcvs/relax?rev=7149&view=rev
Log:
Added Boltzmann's constant to the physical_constants module.


Modified:
    branches/rdc_analysis/physical_constants.py

Modified: branches/rdc_analysis/physical_constants.py
URL: 
http://svn.gna.org/viewcvs/relax/branches/rdc_analysis/physical_constants.py?rev=7149&r1=7148&r2=7149&view=diff
==============================================================================
--- branches/rdc_analysis/physical_constants.py (original)
+++ branches/rdc_analysis/physical_constants.py Mon Aug 11 15:41:13 2008
@@ -42,6 +42,9 @@
 
 mu0 = 4.0 * pi * 1e-7
 """The magnetic constant or the permeability of vacuum."""
+
+kB = 1.380650424 * 1e-23
+"""Boltzmann's constant in SI units of J.K^-1 (the last 2 digits of '24' are 
within the measured error limits)."""
 
 
 # CSA and bond lengths.
@@ -114,7 +117,7 @@
     """
 
     # Calculate and return the value.
-    return mu0 / (4.0*pi) * 15.0 * k * T / Bo**2 / r**3
+    return mu0 / (4.0*pi) * 15.0 * kB * T / Bo**2 / r**3