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-{
- "metadata": {
-  "name": "",
-  "signature": "sha256:eeb9c551735bd0ab45890fc906baf874437271bf852063fccc60d822b2aaeaef"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 1,
-     "metadata": {},
-     "source": [
-      "20: Nuclear radiation detectors and particle accelerators"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example number 20.1, Page number 390"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#importing modules\n",
-      "import math\n",
-      "from __future__ import division\n",
-      "\n",
-      "#Variable declaration\n",
-      "h=6.626*10**-34;    #planck's constant(Js)\n",
-      "e=1.6*10**-19;   #conversion factor from J to eV\n",
-      "m=1.67*10**-27;    #mass of proton(kg)\n",
-      "E=30*10**6;   #energy(eV)\n",
-      "r=1.2*10**-15;   #radius of nucleon(m)\n",
-      "\n",
-      "#Calculation\n",
-      "lamdaP=h/math.sqrt(2*m*E*e);   #wavelength of proton(m)\n",
-      "lamdaAlpha=h/math.sqrt(2*4*m*E*e);   #wavelength of alpha particle(m)\n",
-      "a=2*r;    #size of nucleon(m)\n",
-      "\n",
-      "#Result\n",
-      "print \"wavelength of proton is\",round(lamdaP*10**15,1),\"*10**-15 m\"\n",
-      "print \"wavelength of alpha particle is\",round(lamdaAlpha*10**15,1),\"*10**-15 m\"\n",
-      "print \"size of nucleon is\",a,\"m\"\n",
-      "print \"alpha particle is better\""
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "wavelength of proton is 5.2 *10**-15 m\n",
-        "wavelength of alpha particle is 2.6 *10**-15 m\n",
-        "size of nucleon is 2.4e-15 m\n",
-        "alpha particle is better\n"
-       ]
-      }
-     ],
-     "prompt_number": 3
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example number 20.2, Page number 391"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#importing modules\n",
-      "import math\n",
-      "from __future__ import division\n",
-      "\n",
-      "#Variable declaration\n",
-      "q=1.6*10**-19;   #conversion factor from J to eV\n",
-      "B=2;   #magnetic field(T)\n",
-      "m=1.67*10**-27;    #mass of proton(kg)\n",
-      "R=0.25;   #radius(m)\n",
-      "a=6.24*10**12;   #conversion factor from J to MeV\n",
-      "\n",
-      "#Calculation\n",
-      "f=q*B/(2*math.pi*m);    #frequency needed(MHz)\n",
-      "KE=q**2*B**2*R**2/(2*m);   #kinetic energy(J)\n",
-      "KE=KE*a;     #kinetic energy(MeV)\n",
-      "\n",
-      "#Result\n",
-      "print \"frequency needed is\",round(f*10**-6,1),\"MHz\"\n",
-      "print \"kinetic energy is\",round(KE),\"MeV\""
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "frequency needed is 30.5 MHz\n",
-        "kinetic energy is 12.0 MeV\n"
-       ]
-      }
-     ],
-     "prompt_number": 8
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
-\ No newline at end of file