update readme

Author: jamesgrimmett

README.md

@@ -7,41 +7,46 @@ Usage
 
 ```python
 >>> import wikitopes
->>> df = wikitopes.get('plutonium')
->>> df.head()
-  nuclide     Z      N  ... daughter_isotope spin-parity branching_ratio
-0   228Pu  94.0  134.0  ...             224U          0+           0.999
-1   228Pu  94.0  134.0  ...            228Np          0+           0.001
-2   229Pu  94.0  135.0  ...             225U       3/2+#           1.000
-3   230Pu  94.0  136.0  ...             226U          0+           1.000
-4   230Pu  94.0  136.0  ...            230Np          0+           0.000
-
-[5 rows x 9 columns]
+>>> df = wikitopes.get(elements = ['zinc','plutonium'])
+>>> df
+   nuclide   Z    N  ... daughter_isotope spin-parity branching_ratio
+0     54Zn  30   24  ...             52Ni          0+    1.000000e+00
+1     55Zn  30   25  ...             53Ni       5/2−#    1.000000e+00
+2     55Zn  30   25  ...             55Cu       5/2−#    1.000000e+00
+3     56Zn  30   26  ...             56Cu          0+    1.000000e+00
+4     57Zn  30   27  ...             56Ni       7/2−#    6.500000e-01
+..     ...  ..  ...  ...              ...         ...             ...
+44   244Pu  94  150  ...        (various)          0+    1.230000e-03
+45   244Pu  94  150  ...            244Cm          0+    7.300000e-11
+46   245Pu  94  151  ...            245Am      (9/2−)    1.000000e+00
+47   246Pu  94  152  ...           246mAm          0+    1.000000e+00
+48   247Pu  94  153  ...            247Am       1/2+#    1.000000e+00
+
+[79 rows x 9 columns]
 ```
 
-You can pass a list of elements:
+You can leave the decay mode/branching ratio unprocessed in raw form
 
 ```python
 >>> import wikitopes
->>> df = wikitopes.get(['zinc','plutonium'])
->>> df
-   nuclide     Z      N  ... daughter_isotope spin-parity branching_ratio
-0     54Zn  30.0   24.0  ...             52Ni          0+    1.000000e+00
-1     55Zn  30.0   25.0  ...             53Ni       5/2−#    1.000000e+00
-2     55Zn  30.0   25.0  ...             55Cu       5/2−#    1.000000e+00
-3     56Zn  30.0   26.0  ...             56Cu          0+    1.000000e+00
-4     57Zn  30.0   27.0  ...             56Ni       7/2−#    6.500000e-01
-..     ...   ...    ...  ...              ...         ...             ...
-44   244Pu  94.0  150.0  ...        (various)          0+    1.230000e-03
-45   244Pu  94.0  150.0  ...            244Cm          0+    7.300000e-11
-46   245Pu  94.0  151.0  ...            245Am      (9/2−)    1.000000e+00
-47   246Pu  94.0  152.0  ...           246mAm          0+    1.000000e+00
-48   247Pu  94.0  153.0  ...            247Am       1/2+#    1.000000e+00
-
-[79 rows x 9 columns]
+>>> df = wikitopes.get(elements = ['zinc','plutonium'], raw_decay_mode = True)      
+>>> df                                                                      
+   nuclide   Z    N  ...        decay_mode daughter_isotope spin-parity
+0     54Zn  30   24  ...                2p             52Ni          0+
+1     55Zn  30   25  ...                2p             53Ni       5/2−#
+2     55Zn  30   25  ...                β+             55Cu       5/2−#
+3     56Zn  30   26  ...                β+             56Cu          0+
+4     57Zn  30   27  ...       β+, p (65%)             56Ni       7/2−#
+..     ...  ..  ...  ...               ...              ...         ...
+44   244Pu  94  150  ...        SF (.123%)        (various)          0+
+45   244Pu  94  150  ...  β−β− (7.3×10−9%)            244Cm          0+
+46   245Pu  94  151  ...                β−            245Am      (9/2−)
+47   246Pu  94  152  ...                β−           246mAm          0+
+48   247Pu  94  153  ...                β−            247Am       1/2+#
+
+[79 rows x 8 columns]
 ```
 
-
 Requirements
 ------------