Compton scatter - Revision history

Ohmic: /* Compton Scatter */

2011-04-23T21:31:04Z

Compton Scatter

← Older revision		Revision as of 21:31, 23 April 2011
Line 63:		Line 63:
	END ComptonScatterEnergyvsCrosssection;		END ComptonScatterEnergyvsCrosssection;
	</source>		</source>
	This is a very basic model that can be improved in many ways. One of the ways ~~would be to use specific variables instead of the general solver_var. Another~~ would be to make the degree variable automatically convert to radians instead of having to manually convert it. The actually calculation is correct however. One bug that I am having is making the cross section calculation refresh when I change a parameter, as of now I have to change in manually in the code, any bug fixes are welcome.		This is a very basic model that can be improved in many ways. One of the ways would be to make the degree variable automatically convert to radians instead of having to manually convert it. The actually calculation is correct however. One bug that I am having is making the cross section calculation refresh when I change a parameter, as of now I have to change in manually in the code, any bug fixes are welcome.

	Note: The cross section calculation yields results in cm^2, not barns. These two models fail when the photon energy approaches the binding energy of the atom.		Note: The cross section calculation yields results in cm^2, not barns. These two models fail when the photon energy approaches the binding energy of the atom.

Ohmic: /* Compton Scatter */

2011-04-23T21:28:10Z

Compton Scatter

← Older revision		Revision as of 21:28, 23 April 2011
Line 35:		Line 35:

	MODEL ComptonScatterEnergyvsCrosssection;		MODEL ComptonScatterEnergyvsCrosssection;
	E IS_A ~~solver_var~~;		E IS_A energy;
	Z IS_A solver_var;		Z IS_A solver_var;
	Lambda IS_A solver_var;		Lambda IS_A solver_var;
	Re IS_A solver_var;		Re IS_A solver_var;
	Xsection IS_A solver_var;		Xsection IS_A solver_var;
	ERM IS_A ~~solver_var~~;		ERM IS_A energy;

	calculate: Lambda = ERM/E;		calculate: Lambda = ERM/E;
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	METHOD values;		METHOD values;
	E := 0.01;		E := 0.01 {MeV};
	Z := 207.0;		Z := 207.0;
	Re := 2.8179e-13;		Re := 2.8179e-13;
	ERM := .511;		ERM := .511 {MeV};
	END values;		END values;

Ohmic: /* Compton Scatter */

2011-04-23T21:23:03Z

Compton Scatter

← Older revision		Revision as of 21:23, 23 April 2011
Line 9:		Line 9:
	MODEL ComptonScatterEnergyvsAngle;		MODEL ComptonScatterEnergyvsAngle;
	theta IS_A angle; (Degrees in Radians)		theta IS_A angle; (Degrees in Radians)
	Escat IS_A ~~solver_var~~; (Scattering Energy)		Escat IS_A energy; (Scattering Energy)
	E IS_A ~~solver_var~~; (Incident Energy (MeV))		E IS_A energy; (Incident Energy (MeV))
	ERM IS_A ~~solver_var~~; (Electron Rest Mass Energy (MeV)		ERM IS_A energy; (Electron Rest Mass Energy (MeV)
	degree IS_A solver_var; (Scattering Angle (degrees) )		degree IS_A solver_var; (Scattering Angle (degrees) )

Line 23:		Line 23:

	METHOD values;		METHOD values;
	E := 1.0;		E := 1.0 {MeV};
	ERM := 0.511;		ERM := 0.511 {MeV};
	degree := 1;		degree := 1;
	END values;		END values;

Ohmic: /* Compton Scatter */

2011-04-08T03:31:37Z

Compton Scatter

← Older revision		Revision as of 03:31, 8 April 2011
Line 1:		Line 1:
	== Compton Scatter ==		== Compton Scatter ==

	Below is a program that will calculate the scattering energy of a photon based off of the initial energy and the scattering angle.		Below is a program that will calculate the scattering energy of a photon based off of the initial energy and the scattering angle. It also calculates the microscopic cross section of a particular atom with Z number of electrons

	<source lang="a4c">		<source lang="a4c">
Line 7:		Line 7:
	REQUIRE "atoms.a4l";		REQUIRE "atoms.a4l";

	MODEL ~~ComptonScatter~~;		MODEL ComptonScatterEnergyvsAngle;
	theta IS_A angle; (Degrees in Radians)		theta IS_A angle; (Degrees in Radians)
	Escat IS_A solver_var; (Scattering Energy)		Escat IS_A solver_var; (Scattering Energy)
	E IS_A solver_var; (Incident Energy (MeV))		E IS_A solver_var; (Incident Energy (MeV))
	ERM IS_A solver_var; (Electron Rest Mass Energy (MeV))		ERM IS_A solver_var; (Electron Rest Mass Energy (MeV)
	degree IS_A solver_var; (Scattering Angle (degrees) )		degree IS_A solver_var; (Scattering Angle (degrees) )

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	END specify;		END specify;

	END ~~ComptonScatter~~;		END ComptonScatterEnergyvsAngle;

			MODEL ComptonScatterEnergyvsCrosssection;
			E IS_A solver_var;
			Z IS_A solver_var;
			Lambda IS_A solver_var;
			Re IS_A solver_var;
			Xsection IS_A solver_var;
			ERM IS_A solver_var;

			calculate: Lambda = ERM/E;
			Xsection = 1{PI} * Z * Re^2 * Lambda((1 - 2Lambda - 2Lambda^2 )ln(1 + 2/Lambda) + 2(1 + 9Lambda + 8Lambda^2 + 2Lambda^3)/(Lambda+2)^2);

			METHODS
			METHOD on_load;
			RUN values;
			RUN specify;
			END on_load;

			METHOD values;
			E := 0.01;
			Z := 207.0;
			Re := 2.8179e-13;
			ERM := .511;
			END values;

			METHOD specify;
			FIX E, Z, Re, ERM;
			END specify;
			END ComptonScatterEnergyvsCrosssection;
	</source>		</source>
			This is a very basic model that can be improved in many ways. One of the ways would be to use specific variables instead of the general solver_var. Another would be to make the degree variable automatically convert to radians instead of having to manually convert it. The actually calculation is correct however. One bug that I am having is making the cross section calculation refresh when I change a parameter, as of now I have to change in manually in the code, any bug fixes are welcome.

	~~This is a very basic model that can be improved~~ in ~~many ways~~. ~~One of~~ the ~~ways would be to use specific variables instead~~ of the ~~general solver_var. Another would be to make the degree variable automatically convert to radians instead of having to manually convert it. The actually calculation is correct however~~.		Note: The cross section calculation yields results in cm^2, not barns. These two models fail when the photon energy approaches the binding energy of the atom.

	== References ==		== References ==
	Kenneth, J., and Richard E. Fundamentals of nuclear science and engineering. 2nd. CRC, 2008. 179. Print.		Kenneth, J., and Richard E. Fundamentals of nuclear science and engineering. 2nd. CRC, 2008. 179. Print.

Ohmic: /* Compton Scatter */

2011-04-03T23:05:24Z

Compton Scatter

← Older revision		Revision as of 23:05, 3 April 2011
Line 11:		Line 11:
	Escat IS_A solver_var; (Scattering Energy)		Escat IS_A solver_var; (Scattering Energy)
	E IS_A solver_var; (Incident Energy (MeV))		E IS_A solver_var; (Incident Energy (MeV))
	ERM IS_A solver_var; (Electron Rest Mass Energy (MeV)		ERM IS_A solver_var; (Electron Rest Mass Energy (MeV))
	degree IS_A solver_var; (Scattering Angle (degrees) )		degree IS_A solver_var; (Scattering Angle (degrees) )

Line 36:		Line 36:

	This is a very basic model that can be improved in many ways. One of the ways would be to use specific variables instead of the general solver_var. Another would be to make the degree variable automatically convert to radians instead of having to manually convert it. The actually calculation is correct however.		This is a very basic model that can be improved in many ways. One of the ways would be to use specific variables instead of the general solver_var. Another would be to make the degree variable automatically convert to radians instead of having to manually convert it. The actually calculation is correct however.


	== References ==		== References ==
	Kenneth, J., and Richard E. Fundamentals of nuclear science and engineering. 2nd. CRC, 2008. 179. Print.		Kenneth, J., and Richard E. Fundamentals of nuclear science and engineering. 2nd. CRC, 2008. 179. Print.

Ohmic: Created page with '== Compton Scatter == Below is a program that will calculate the scattering energy of a photon based off of the initial energy and the scattering angle. REQ…'

2011-04-03T22:43:47Z

Created page with '== Compton Scatter == Below is a program that will calculate the scattering energy of a photon based off of the initial energy and the scattering angle. <source lang="a4c"> REQ…'

New page

== Compton Scatter ==

Below is a program that will calculate the scattering energy of a photon based off of the initial energy and the scattering angle.

<source lang="a4c">
REQUIRE "system.a4l";
REQUIRE "atoms.a4l";

MODEL ComptonScatter;
theta IS_A angle; (*Degrees in Radians*)
Escat IS_A solver_var; (*Scattering Energy*)
E IS_A solver_var; (*Incident Energy (MeV)*)
ERM IS_A solver_var; (*Electron Rest Mass Energy (MeV*)
degree IS_A solver_var; (*Scattering Angle (degrees) *)

convert: theta = degree * 1{PI} / 180.;
Escat = E/(1 + (E/ERM)*(1 - cos(theta)));
METHODS
METHOD on_load;
RUN values;
RUN specify;
END on_load;

METHOD values;
E := 1.0;
ERM := 0.511;
degree := 1;
END values;

METHOD specify;
FIX E, ERM, degree;
END specify;

END ComptonScatter;
</source>

This is a very basic model that can be improved in many ways. One of the ways would be to use specific variables instead of the general solver_var. Another would be to make the degree variable automatically convert to radians instead of having to manually convert it. The actually calculation is correct however.

== References ==
Kenneth, J., and Richard E. Fundamentals of nuclear science and engineering. 2nd. CRC, 2008. 179. Print.