Determining the time interval in a radiation counting problem

AI Thread Summary
The discussion revolves around determining the time interval in a radiation counting problem using a given formula. Participants explore how to manipulate the equation to isolate time (t) and consider integrating both sides from 0 to a specified time. There is clarification on the significance of the variable t' as a dummy variable for integration purposes. One participant concludes that they can express the probability function as 1 - exp(-Cn_dot * t) and successfully figures out how to sample the time. The conversation highlights the importance of understanding the integration process and the role of time variables in the context of radiation events.
SKT_90
Messages
13
Reaction score
0

Homework Statement


Given: Cn_dot = true event rate = 10 interactions/s
p(t')dt' = differential probability of an event

Homework Equations



p(t')dt' = Cn_dot * exp(-Cn_dot * t') dt'

The Attempt at a Solution


[/B]
I want to sample the time interval using python. But I'm not sure how to go about manipulating the formula to get t.

Should I integrate both sides from 0 to x and isolate for t? I'm not sure what to make of the LHS.
 
Physics news on Phys.org
What do you mean by "to get t"?
What do you want to do?
 
mfb said:
What do you mean by "to get t"?
What do you want to do?
I think if this is to be run through a program, then a suitable value for Δt should be chosen. Is that what you mean @SKT_90 ?
Also, what is the significance of t prime, vs just t?
It looks to me that if you integrate it from 0 to time T, you will have a probability function that it happens in T seconds.
 
scottdave said:
I think if this is to be run through a program, then a suitable value for Δt should be chosen. Is that what you mean @SKT_90 ?
Also, what is the significance of t prime, vs just t?
It looks to me that if you integrate it from 0 to time T, you will have a probability function that it happens in T seconds.

Hi scottdave,

Yes - this is what I mean to do. I think t' is just a dummy variable as stated in the question, so we can integrate it from 0 to t.
 
So i get :

1 - exp(-Cn_dot * t) = p(t)

I'm not sure how to sample the time from here?
 
nvm, figured it out
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top