1 package org.lcsim.material;
2
3 /**
4 * A class to represent chemical elements.
5 * @author jeremym
6 * @version $Id: MaterialElement.java,v 1.12 2011/03/11 19:22:20 jeremy Exp $
7 */
8 public class MaterialElement
9 {
10 private String _name; // formula
11 private double _Z; // atomic number
12 private double _A; // atomic weight
13 private double _nuclearInteractionLength; // lambda
14 private double _radiationLength; // X0
15
16 //public static final double AVOGADRO = 6.24151e+21;
17
18 /**
19 * The ctor for the element class.
20 * @param name The name of the element; same as formula.
21 * @param Z The atomic number.
22 * @param A The atomic mass.
23 * @param X0 The radiation length.
24 * @param lambda The nuclear interaction length.
25 */
26 MaterialElement(String name,
27 double Z,
28 double A,
29 double X0,
30 double lambda)
31 {
32 // Set parameters.
33 _name = name;
34 _Z = Z;
35 _A = A;
36 _radiationLength = X0;
37 _nuclearInteractionLength = lambda;
38
39 // Add the element to the static MaterialManager instance.
40 MaterialManager.instance().addElement(this);
41 }
42
43 /**
44 * Get the atomic number of the element.
45 * @return The atomic number.
46 */
47 public double getZ()
48 {
49 return _Z;
50 }
51
52 /**
53 * Get the atomic weight of the element.
54 * @return The atomic weight.
55 */
56 public double getA()
57 {
58 return _A;
59 }
60
61 /**
62 * Get the name of the element.
63 * @return The name of the element.
64 */
65 public String getName()
66 {
67 return _name;
68 }
69
70 /**
71 * Get the nuclear interaction length of the element (cm).
72 * @return The nuclear interaction length in cm.
73 */
74 public double getNuclearInteractionLength()
75 {
76 return _nuclearInteractionLength;
77 }
78
79 /**
80 * Get the radiation length of the element (cm).
81 * @return The nuclear interaction length in cm.
82 */
83 public double getRadiationLength()
84 {
85 return _radiationLength;
86 }
87
88 /**
89 * Convert to String.
90 * @return String representation.
91 */
92 public String toString()
93 {
94 return getName() + "; Z=" + _Z + "; A=" + _A + "; X0=" + _radiationLength + "; lambda=" + _nuclearInteractionLength;
95 }
96 }