Nuclear Radius Equation R = R0 A^(1/3)

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little pixie
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#1
Report Thread starter 9 years ago
#1
If using the nuclear radius equation:

R = R0 A^(1/3)

as shown half-way down this page:
http://en.wikipedia.org/wiki/Atomic_nucleus

r0 = 1.25 fm = 1.25 × 10−15 m

Is this value for r0 always this value, irrespective of the material in question? For example, if it was gold, or some other material?

Thanks
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teachercol
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#2
Report 9 years ago
#2
Yes - its the average radius of a nucleon.

There are different figures used depening how r has been measured - the density of a nucleon doesnt drop as a step function.
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little pixie
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#3
Report Thread starter 9 years ago
#3
Thank you teachercol !
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CALI1198
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#4
Report 6 years ago
#4
I know this is an old thread but I'm a bit confused.

My textbook tells me its 1.05fm but my cgp textbook quotes it as 1.4fm. Would I gain the marks if i used either number?
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natninja
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#5
Report 6 years ago
#5
(Original post by CALI1198)
I know this is an old thread but I'm a bit confused.

My textbook tells me its 1.05fm but my cgp textbook quotes it as 1.4fm. Would I gain the marks if i used either number?
It's an empirically determined constant and is usually quoted to be between 1.2 and 1.5fm
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CALI1198
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#6
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#6
(Original post by natninja)
It's an empirically determined constant and is usually quoted to be between 1.2 and 1.5fm
Thanks. I plan to just stick to 1.25 unless told otherwise

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natninja
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#7
Report 6 years ago
#7
(Original post by CALI1198)
Thanks. I plan to just stick to 1.25 unless told otherwise

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To be fair, even using 1fm would probably be good enough as it is an approximation anyway
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Htx_x346
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#8
Report 2 months ago
#8
I know this is an old thread but are we expected to memorise the value of R0?
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