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In hydrodynamics shocks are caused by steep changes in pressure over short periods of time. In ICF in general, pressure is applied during ablation (the reaction force you mention). This ablation pressure is related to the driver (e.g., laser intensity). For example, in direct-drive ICF, the ablation pressure scales as $I^{2/3}$, where $I$ is the laser ...

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Could anyone explain why the D+T inside the pellet is in two distinct regions? I assume you mean why is it in both vapor form (in the center) and solid (ice) form (layered in the shell). This is coupled to your second question regarding the lower density in the center. The general idea underlying ICF is to set up a hot-spot in the center of the ...

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Is there a canned solution to this? (I don’t think so) No, probably not. There are very few cases in which there is an analytic solution for the Navier-Stokes equations. For pretty much all cases, you have to do it numerically. Which situation do you model? (Steady State) This is only a guess, but probably once the air has filled the sphere, you ...

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Only half of the total number of nuclear reactions release energy. The other half are the reversed processes that absorb energy. However almost the totality of the spontaneous processes are the ones that release energy. Processes that requires some external energy to be inserted into the system are much more rare as can take place only when this energy is ...

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Very interesting question! In chemistry you spend lots of time discussing exothermic and endothermic reactions: when you put your reagents together, sometimes the reaction heats things up, and sometimes the reaction cools things down. Nuclear reactions are very different, in that essentially all spontaneous reactions studied in laboratories are exothermic. ...

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If they didn't release energy, they wouldn't happen. The alternative, nuclear reactions that require energy, clearly need said amount of energy, which has to come from somewhere, e.g. kinetic energy involved in the collision of two nuclei (even ones that release energy usually have a "barrier" and some amount of initial kinetic energy is needed to overcome ...

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Yes jim is right wikipedia article will answer your most of the questions. Still ill list few facts about nuclear reactions here hope those will help you Nuclear reaction basically has two major types fision reaction and fusion reaction (There are other types also i am just listing only two to answer your quenstion in simple words) In fusion reaction two ...

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