public static List <AnnihilationEvent> GenerateEventsLinearSource(double rad, double phi, double length, ref double activity, double currentTime, double dt, double halfLife, int index)
{
Console.WriteLine("{0} Generating {1} events list", DateTime.Now.ToString(), index + 1);
List <AnnihilationEvent> result = new List <AnnihilationEvent>();
long count = Statistics.GetPoisson(activity * dt);
double prevTime = 0;
for (long i = 0; i < count; i++)
{
AnnihilationEvent ev = new AnnihilationEvent();
//uniform sphere distribution
ev.Phi = 2 * Math.PI * rnd.NextDouble();
ev.Theta = Math.Acos(2 * rnd.NextDouble() - 1.0) - Math.PI;
//uniform linear distribution
ev.Position = new Vector3d(rad * Math.Cos(phi), rad * Math.Sin(phi), (rnd.NextDouble() - .5) * length);
//uniform time distribution
var v = rnd.NextDouble();
var tm = 1 - (1 - prevTime) * Math.Pow(v, 1.0 / (count - i));
prevTime = tm;
ev.Time = (tm * dt + currentTime) * 1e9;
ev.Energy = 511e3;
result.Add(ev);
}
activity *= Math.Pow(2, -dt / halfLife);
return(result);
}
public static List <AnnihilationEvent> GenerateEventsCylSource(double rad, double length, ref double activity, double intervalTime, double dt, double halfLife, int index)
{
Console.WriteLine("{0} Generating {1} events list", DateTime.Now.ToString(), index + 1);
var numEvents = Statistics.GetPoisson(activity * dt);
var list = new List <AnnihilationEvent>();
double prevtime = 0;
for (long i = 0; i < numEvents; i++)
{
//uniform time distribution
var v = rnd.NextDouble();
var tm = 1 - (1 - prevtime) * Math.Pow(v, 1.0 / (numEvents - i));
prevtime = tm;
//uniform cyl distribution
double phi = 2 * Math.PI * rnd.NextDouble();
double u = rnd.NextDouble() + rnd.NextDouble();
double R = u > 1 ? (2 - u) * rad : u * rad;
double z = (rnd.NextDouble() - 0.5) * length;
Vector3d position = new Vector3d(R * Math.Cos(phi), R * Math.Sin(phi), z);
var evnt = new AnnihilationEvent(position, (intervalTime + tm * dt) * 1e9, 511E3, 2 * Math.PI * rnd.NextDouble(), Math.Acos(2 * rnd.NextDouble() - 1.0) - Math.PI);
list.Add(evnt);
}
activity *= Math.Pow(2, -dt / halfLife);
return(list);
}
public Photon(AnnihilationEvent ev, bool inverse = false)
{
this.numScatterEvents = 0;
this.StartPosition = this.CurrentPosition = ev.Position;
if (inverse)
{
this.Phi = ev.Phi + Math.PI;
this.Theta = -ev.Theta;
if (this.Phi > 2 * Math.PI)
{
this.Phi -= 2 * Math.PI;
}
}
else
{
this.Phi = ev.Phi;
this.Theta = ev.Theta;
}
this.Status = stat.Free;
this.Time = ev.Time;
this.Energy = ev.Energy;
this.Path = 0;
}
