K40: BetaDecay Class Reference

BetaDecay::BetaDecay	(	int	a,
		int	z,
		double	q,
		double	t_endpoint
	)			`[inline]`

Definition at line 40 of file Potassium_40_gammas.cc.

00041         : A(a), Z(z), Q(q), T_endpoint(t_endpoint), PI(TMath::Pi()), norm(0)
00042     {
00043         doff = true;            // for testing w/out FF
00044         onlyff = false;         // for testing only FF
00045         norm = this->dnde_norm(t_endpoint);
00046     }

double BetaDecay::dnde_norm ( double T_end ) [inline]

Definition at line 49 of file Potassium_40_gammas.cc.

00049                                    {
00050         const int nbins = 100;
00051         const double dT = T_end/nbins;
00052         double sum = 0.0;
00053         for (int ind = 1; ind <= nbins; ++ind) {
00054             double T = double(ind)*dT;
00055             double dnde = 0.0;
00056             if (onlyff) dnde = this->GetFF(T);
00057             else{
00058                 dnde = this->dnde_noff(T);
00059                 if (doff) dnde *= this->GetFF(T);
00060             }
00061             sum += dnde;
00062         }
00063         return sum/nbins;
00064     }

double BetaDecay::dnde ( double T ) [inline]

Definition at line 66 of file Potassium_40_gammas.cc.

00066                           {
00067         double dnde = 0.0;
00068         if (onlyff) dnde = this->GetFF(T);
00069         else {
00070             dnde = this->dnde_noff(T);
00071             if (doff) dnde *= this->GetFF(T);
00072         }
00073         return  dnde / norm;
00074     }

double BetaDecay::dnde_noff ( double T ) [inline]

Definition at line 78 of file Potassium_40_gammas.cc.

00078                                {
00079         double ee = Q+1;
00080         //double ee = T_endpoint+1;
00081         double g = T+1.;
00082         return std::sqrt(g*g-1)*(ee-g)*(ee-g)*g;
00083     }

double BetaDecay::GetFF ( double T ) [inline]

Definition at line 88 of file Potassium_40_gammas.cc.

00088                            {
00089         double A1, A2;
00090         double P, U, S, Y;
00091         double F2;
00092         double E = T+1.;  
00093         P=std::sqrt(E*E-1.0) ;
00094         U=Z/137.0;
00095         S=std::sqrt(1.0-U*U) - 1.;
00096         Y = 2*PI*U*E/P;
00097         A1 = U*U*E*E + P*P/4.;
00098         A2 = std::fabs(Y/(1-std::exp(-Y)));
00099         F2 = std::pow(A1,S) * A2; 
00100         return F2;
00101     }

double BetaDecay::GetFFN ( double T_end ) [inline]

Definition at line 106 of file Potassium_40_gammas.cc.

00106                                 {
00107         double A1, A2;
00108         double P, U, S, Y;
00109         double F2,E;
00110         double EE = T_end/100.;
00111         U=Z/137.0;
00112         S=std::sqrt(1.0-U*U) - 1.;
00113         double F1 = 1E-10;
00114         for (int i = 1; i<=100 ; i++) {
00115             E = double(i)*EE + 1.;
00116             P=std::sqrt(E*E-1.0) ;
00117             Y = 2*PI*U*E/P;
00118             A1 = U*U*E*E + P*P/4.;
00119             A2 = std::fabs(Y/(1-std::exp(-Y)));
00120             F2 = std::pow(A1,S) * A2; 
00121             if (F2 > F1) F1 = F2;
00122         }                  
00123         return F1;
00124     }

int BetaDecay::A [private]

Definition at line 30 of file Potassium_40_gammas.cc.

int BetaDecay::Z [private]

Definition at line 30 of file Potassium_40_gammas.cc.

double BetaDecay::Q [private]

Definition at line 31 of file Potassium_40_gammas.cc.

double BetaDecay::T_endpoint [private]

Definition at line 31 of file Potassium_40_gammas.cc.

double BetaDecay::PI [private]

Definition at line 31 of file Potassium_40_gammas.cc.

double BetaDecay::norm [private]

Definition at line 33 of file Potassium_40_gammas.cc.

bool BetaDecay::doff [private]

Definition at line 35 of file Potassium_40_gammas.cc.

bool BetaDecay::onlyff [private]

Definition at line 35 of file Potassium_40_gammas.cc.

In This Package:

BetaDecay Class Reference

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation


Public Member Functions
	BetaDecay (int a, int z, double q, double t_endpoint)
double	dnde_norm (double T_end)
double	dnde (double T)
double	dnde_noff (double T)
double	GetFF (double T)
double	GetFFN (double T_end)
Private Attributes
int	A
int	Z
double	Q
double	T_endpoint
double	PI
double	norm
bool	doff
bool	onlyff