Honda Motorcycles - FireBlades.org - Reply to Topic
Off-Topic Discussion of anything that doesn't fit anywhere else. If it's related to motorcycles in any way, DO NOT post it here. Post it in General Discussion or a more specific forum.

Thread: 6th form of matter... Reply to Thread
Title:
Message:

Register Now



In order to be able to post messages on the Honda Motorcycles - FireBlades.org forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
A valid e-mail address is REQUIRED. You will not have access to any site features until you activate your account using the activation e-mail that is sent to this address.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
01-31-2004 4:01 PM
RaggedEdge
Re: 6th form of matter...

See this link, spillover.

Where's Chain at?
01-31-2004 11:44 AM
spillover
Re: 6th form of matter...

Quote:
Originally Posted by Baketech
Yes, but weren't you initially discussing the Born/Oppenhiemer Approximation.....
Maybe I am just cornfused....
Speaking of corn, anyone seen Chain? Is he on a .org vacation?
01-30-2004 8:02 PM
Baketech
Re: 6th form of matter...

Quote:
Originally Posted by spillover
Max Born
More on selection rules



EDIT: Mo' better on selection rules. Doesn't blame anybody for them, though...
Yes, but weren't you initially discussing the Born/Oppenhiemer Approximation.....
Maybe I am just cornfused....
01-30-2004 6:37 PM
nhfirefighter13
Re: 6th form of matter...

Quote:
Originally Posted by sweetonion
nuh uh...

I'm siding with Onions on this one. He's smart.
01-30-2004 6:16 PM
spillover
Re: 6th form of matter...

Max Born
More on selection rules



EDIT: Mo' better on selection rules. Doesn't blame anybody for them, though...
01-30-2004 11:46 AM
ULEWZ
Re: 6th form of matter...

That reminds me, I need to go out and buy a new pocket protector.
01-30-2004 11:40 AM
Baketech
Re: 6th form of matter...

I was biting my tongue on that one as well....looked like a combination of Niels Bohr, and Max Planck.....
01-30-2004 11:16 AM
luvtolean
Re: 6th form of matter...

Quote:
Originally Posted by spillover
The electron's orbital decay has selection rules (can't drop to a lower state by changing more than one unit of total angular momentum at a time, for example, I think that they are called Born's Rules after Max Born, ah well, they are named after someone).
That would be Niels Bohr and we called them Bohr's Laws in college. Max Planck is also a physicist famous for work in radiation, probably where you got that from...

See, I'm not the only one freq.



01-29-2004 9:27 PM
sweetonion
Re: 6th form of matter...

Quote:
Originally Posted by spillover
You are right that it is like the plasma problem. They use them to create a 'bottle' so they can block out thermal noise.

They also use them to polarize the potassiums so they lasers can get at them. The electron's orbital decay has selection rules (can't drop to a lower state by changing more than one unit of total angular momentum at a time, for example, I think that they are called Born's Rules after Max Born, ah well, they are named after someone).

At these temperatures, some of the inner electrons have dropped into mesostable states. That is, they can't drop any lower (stuck in 2p, maybe, to borrow the chemists nomenclature) from where they are, so they use the laser to stimulate them precisely into states that they can decay from to a net lower state. If you've heard of sonic cooling, it's the same principle. Kind of ironic that adding energy eventually results in a net energy loss.

I'll spare you a technical definition of temperature (because I am not sure that I can do it) and just say that as the temperature drops the quantum effects become more pronounced and that can be exploited to drop the temp even lower. When they talk about a billionth of a degree, they are likely down to trying to get ONE proton, neutron, or electron, in a system of 30-40 particles spinning the other way.

nuh uh...
01-29-2004 8:46 PM
GhostRider
Re: 6th form of matter...

Quote:
Originally Posted by ND4SPD
Nucular powered
nuclear...NUCLEAR!!!
01-29-2004 1:43 PM
spillover
Re: 6th form of matter...

Quote:
Originally Posted by luvtolean
... the key to both being magnetic fields to accelerate or decelerate the particles.
You are right that it is like the plasma problem. They use them to create a 'bottle' so they can block out thermal noise.

They also use them to polarize the potassiums so they lasers can get at them. The electron's orbital decay has selection rules (can't drop to a lower state by changing more than one unit of total angular momentum at a time, for example, I think that they are called Born's Rules after Max Born, ah well, they are named after someone).

At these temperatures, some of the inner electrons have dropped into mesostable states. That is, they can't drop any lower (stuck in 2p, maybe, to borrow the chemists nomenclature) from where they are, so they use the laser to stimulate them precisely into states that they can decay from to a net lower state. If you've heard of sonic cooling, it's the same principle. Kind of ironic that adding energy eventually results in a net energy loss.

I'll spare you a technical definition of temperature (because I am not sure that I can do it) and just say that as the temperature drops the quantum effects become more pronounced and that can be exploited to drop the temp even lower. When they talk about a billionth of a degree, they are likely down to trying to get ONE proton, neutron, or electron, in a system of 30-40 particles spinning the other way.
01-29-2004 12:23 PM
slowpoke
Re: 6th form of matter...

very interesting.
01-29-2004 11:26 AM
luvtolean
Re: 6th form of matter...



Sorry...studied this stuff a bit in college and still think it's fascinating...makes me a bit enthusiastic.



01-29-2004 11:17 AM
freq
Re: 6th form of matter...

Quote:
Originally Posted by luvtolean
"They cooled potassium gas to a billionth of a degree C above absolute zero or minus 459 degrees F -- which is the point at which matter stops moving.

They confined the gas in a vacuum chamber and used magnetic fields and laser light to manipulate the potassium atoms into pairing up. "

Actually not too far from how they make superheated gases into a plasma for fusion (how the sun works too), the key to both being magnetic fields to accelerate or decelerate the particles.
Thanks EinStegen.
01-29-2004 10:42 AM
luvtolean
Re: 6th form of matter...

Quote:
Originally Posted by slowpoke
How the hell do you cool something to almost absolute zero?
"They cooled potassium gas to a billionth of a degree C above absolute zero or minus 459 degrees F -- which is the point at which matter stops moving.

They confined the gas in a vacuum chamber and used magnetic fields and laser light to manipulate the potassium atoms into pairing up. "

Actually not too far from how they make superheated gases into a plasma for fusion (how the sun works too), the key to both being magnetic fields to accelerate or decelerate the particles.



This thread has more than 15 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome