1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
{
"metadata": {
"name": "",
"signature": "sha256:42eb4bd0fae1331d52fd855bad43219acea712dc31c5270f1f64fa698ba366ad"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"21: Elementary particles"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 21.1, Page number 399"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"mpi=140; #mass of pi-meson\n",
"mp=938.3; #mass of proton\n",
"mk=498; #mass of k\n",
"m=1116; \n",
"\n",
"#Calculation\n",
"Q=mpi+mp-mk-m; #Q-value(MeV)\n",
"\n",
"#Result\n",
"print \"Q-value is\",round(Q),\"MeV\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Q-value is -536.0 MeV\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 21.2, Page number 399"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"mpc2=938.3; #energy of proton(MeV)\n",
"Epic2=139.6; #energy of pi-meson(MeV)\n",
"mnc2=939.6; #energy of neutron(MeV)\n",
"KE=0.6; #kinetic energy of neutron(MeV)\n",
"\n",
"#Calculation\n",
"Epi=mpc2+Epic2-mnc2-KE; #energy conservation(MeV)\n",
"mpic2=math.sqrt((Epi**2)-((mnc2+KE)**2)+(mnc2**2)); #pi0 mass(MeV)\n",
"\n",
"#Result\n",
"print \"pi0 mass is\",round(mpic2,1),\"MeV\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"pi0 mass is 133.5 MeV\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
