Monte Carlo Binary Collision Approximation - Revision history

Foretony at 20:39, 26 February 2019

2019-02-26T20:39:24Z

Vanwdani at 04:22, 26 February 2019

2019-02-26T04:22:50Z

Vanwdani at 03:45, 26 February 2019

2019-02-26T03:45:41Z

Vanwdani at 03:37, 26 February 2019

2019-02-26T03:37:43Z

Vanwdani at 03:21, 26 February 2019

2019-02-26T03:21:17Z

Vanwdani at 03:12, 26 February 2019

2019-02-26T03:12:39Z

Vanwdani at 03:03, 26 February 2019

2019-02-26T03:03:26Z

Vanwdani at 03:02, 26 February 2019

2019-02-26T03:02:49Z

Vanwdani: Created page with "When uranium-235 undergoes fission, the average of the fragment mass is about 118, but it is more probable that the pair will have an unequal distribution in mass. A common pa..."

2019-02-26T02:57:00Z

Created page with "When uranium-235 undergoes fission, the average of the fragment mass is about 118, but it is more probable that the pair will have an unequal distribution in mass. A common pa..."

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When uranium-235 undergoes fission, the average of the fragment mass is about 118, but it is more probable that the pair will have an unequal distribution in mass. A common pair of fragments from uranium-235 fission is xenon and strontium:

<center><math>^{235}U+n\rightarrow ^{236}U^{*} \rightarrow ^{140}Xe+^{94}Sr+2n</math></center>

[[File:U235_fission_Xe_Sr.png]]

← Older revision		Revision as of 20:39, 26 February 2019
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		+	=The fission process=
		+	The fission axis is defined as the axis along which the fission fragments travel (back-to-back). neutrons emitted as a result of the fission are observed to follow and angular distribution that has a spherically symmetric component and a component that shows a preference for neutrons to be emitted along the fission axis. Scission neutrons have a spherical angular distribution as the are "evaporated" from the surface of the fission nucleus. The picture you posted suggests that they are scission neutrons. Scission neutrons are a small fraction of the neutron emitted in fission (< 35%). Most of the fission neutrons are ejected by the moving fission fragments. While the neutrons are thought to be emitted isotropically from the fragment, the velocity of the fragment skews the angular distribution of the neutrons. Below is a cartoon of neutron induced fission. Spontaneous fission would be similar.
		+
		+	=U-235=
		+
		+
	When uranium-235 undergoes fission, the average of the fragment mass is about 118, but it is more probable that the pair will have an unequal distribution in mass. A common pair of fragments from uranium-235 fission is xenon and strontium as shown in the reaction:		When uranium-235 undergoes fission, the average of the fragment mass is about 118, but it is more probable that the pair will have an unequal distribution in mass. A common pair of fragments from uranium-235 fission is xenon and strontium as shown in the reaction:

@@ Line 10: / Line 10: @@
 Nuclear fission of uranium-235 yields an enormous amount of energy from the fact that the fission products have less total mass than the uranium nucleus, a mass change that is converted to energy by the Einstein relationship <math>E=mc^2</math>.  Using the Law of Conservation of Energy, we can look at the total energy before and after the fission to determine how much energy is released in this process.
-<center><math>^{236}_{92}U  : 92(938.272\ MeV)+144(939.565\ MeV)\ =\ 221.618\ GeV</math></center>
+<center><math>^{236}_{92}U  : 92(938.272\ MeV)+144(939.565\ MeV)\ =\ 221.678\ GeV</math></center>
 <center><math>^{140}_{54}Xe : 54(938.272\ MeV)+86(939.565\ MeV)\ =\ 131.469\ GeV</math></center>
 <center><math>^{94}_{38}Sr  : 38(938.272\ MeV)+56(939.565\ MeV)\ =\ 88.269\ GeV</math></center>
-<center><math>2*n : 2(939.565\ MeV)\ =\ 1.879\ GeV</math></center>
+<center><math>3*n : 2(939.565\ MeV)\ =\ 1.879\ GeV</math></center>
 <center><math>-----------------------------</math></center>
-<center><math> Energy released=
+<center><math> Energy released=341\ MeV</math></center>

@@ Line 10: / Line 10: @@
 Nuclear fission of uranium-235 yields an enormous amount of energy from the fact that the fission products have less total mass than the uranium nucleus, a mass change that is converted to energy by the Einstein relationship <math>E=mc^2</math>.  Using the Law of Conservation of Energy, we can look at the total energy before and after the fission to determine how much energy is released in this process.
-<center><math>^{235}_{92}U  : 92(938.272\ MeV)+143(939.565\ MeV)\ =\ \ GeV</math></center>
+<center><math>^{236}_{92}U  : 92(938.272\ MeV)+144(939.565\ MeV)\ =\ 221.618\ GeV</math></center>
-<center><math>^{140}_{54}Xe : 54(938.272\ MeV)+86(939.565\ MeV)\ =\ \ GeV</math></center>
+<center><math>^{140}_{54}Xe : 54(938.272\ MeV)+86(939.565\ MeV)\ =\ 131.469\ GeV</math></center>
-<center><math>^{94}_{38}Sr  : 38(938.272\ MeV)+56(939.565\ MeV)\ =\ \ GeV</math></center>
+<center><math>^{94}_{38}Sr  : 38(938.272\ MeV)+56(939.565\ MeV)\ =\ 88.269\ GeV</math></center>
-<center><math>2*n : 2(939.565\ MeV)\ =\ 1.879\ GeV</center>
+<center><math>2*n : 2(939.565\ MeV)\ =\ 1.879\ GeV</math></center>
 <center><math>-----------------------------</math></center>
 <center><math> Energy released=

@@ Line 10: / Line 10: @@
 Nuclear fission of uranium-235 yields an enormous amount of energy from the fact that the fission products have less total mass than the uranium nucleus, a mass change that is converted to energy by the Einstein relationship <math>E=mc^2</math>.  Using the Law of Conservation of Energy, we can look at the total energy before and after the fission to determine how much energy is released in this process.
-<center><math>^{235}_{92}U  : 218.8969\ GeV</math></center>
+<center><math>^{235}_{92}U  : 92(938.272\ MeV)+143(939.565\ MeV)\ =\ \ GeV</math></center>
-<center><math>^{140}_{54}Xe : 130.4092\ GeV</math></center>
+<center><math>^{140}_{54}Xe : 54(938.272\ MeV)+86(939.565\ MeV)\ =\ \ GeV</math></center>
-<center><math>^{94}_{38}Sr  : 87.56\ GeV</math></center>
+<center><math>^{94}_{38}Sr  : 38(938.272\ MeV)+56(939.565\ MeV)\ =\ \ GeV</math></center>

@@ Line 10: / Line 10: @@
 Nuclear fission of uranium-235 yields an enormous amount of energy from the fact that the fission products have less total mass than the uranium nucleus, a mass change that is converted to energy by the Einstein relationship <math>E=mc^2</math>.  Using the Law of Conservation of Energy, we can look at the total energy before and after the fission to determine how much energy is released in this process.
-<center><math>^{235}_{92}U : 218.8969\ MeV</math></center>
+<center><math>^{235}_{92}U  : 218.8969\ GeV</math></center>
-<center><math>^{140}_{54}Xe : \ MeV</math></center>
+<center><math>^{140}_{54}Xe : 130.4092\ GeV</math></center>

← Older revision		Revision as of 03:12, 26 February 2019
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−	When uranium-235 undergoes fission, the average of the fragment mass is about 118, but it is more probable that the pair will have an unequal distribution in mass. A common pair of fragments from uranium-235 fission is xenon and strontium:	+	When uranium-235 undergoes fission, the average of the fragment mass is about 118, but it is more probable that the pair will have an unequal distribution in mass. A common pair of fragments from uranium-235 fission is xenon and strontium as shown in the reaction:


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	<center>[[File:U235_fission_Xe_Sr.png\|"thumb"\|"border"\|"center"\|"middle"\|"upright"\|\|\|page=Page\|\|Figure 1: Typical Uranium 235 fission fragments Xenon and Strontium. ]]</center>		<center>[[File:U235_fission_Xe_Sr.png\|"thumb"\|"border"\|"center"\|"middle"\|"upright"\|\|\|page=Page\|\|Figure 1: Typical Uranium 235 fission fragments Xenon and Strontium. ]]</center>
		+
		+
		+	Nuclear fission of uranium-235 yields an enormous amount of energy from the fact that the fission products have less total mass than the uranium nucleus, a mass change that is converted to energy by the Einstein relationship <math>E=mc^2</math>. Using the Law of Conservation of Energy, we can look at the total energy before and after the fission to determine how much energy is released in this process.
		+
		+	<center><math>^{235}_{92}U : 218.8969\ MeV</math></center>
		+	<center><math>^{140}_{54}Xe : \ MeV</math></center>

← Older revision		Revision as of 03:03, 26 February 2019
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−	~~[[File:U235_fission_Xe_Sr.png]]~~	+	<center>[[File:U235_fission_Xe_Sr.png\|"thumb"\|"border"\|"center"\|"middle"\|"upright"\|\|\|page=Page\|\|Figure 1: Typical Uranium 235 fission fragments Xenon and Strontium. ]]</center>
−
−	[[File:U235_fission_Xe_Sr.png\|"thumb"\|"border"\|"center"\|"middle"\|"upright"\|\|\|page=Page\|\|Figure 1: Typical Uranium 235 fission fragments Xenon and Strontium. ]]

@@ Line 1: / Line 1: @@
 When uranium-235 undergoes fission, the average of the fragment mass is about 118, but it is more probable that the pair will have an unequal distribution in mass. A common pair of fragments from uranium-235 fission is xenon and strontium:
 <center><math>^{235}U+n\rightarrow ^{236}U^{*} \rightarrow ^{140}Xe+^{94}Sr+2n</math></center>
@@ Line 5: / Line 6: @@
 [[File:U235_fission_Xe_Sr.png]]