Re: low temperature physics

[Bernard Cleyet <anngeorg@PACBELL.NET>]

The intro. text by Eisberg and Lerner devotes several pages to "heat"
pumps, refrigerators, and engines, in particular, including a diagram of
atomic isothermal magnetization and adiabatic demagnetization.  (nuclear
is mentioned, including 10^-6 deg. K achievable).  They relate the
process to the Carnot cycle diagram.  I post this because I think this
text belongs in teacher's reference libraries.  Because it is an intro
book the phase diagram for He is not included.

The advantage of E&L over LW's references is they include diagrams.

bc

Tim O'Donnell wrote:

> A couple of concepts a fellow teacher asked about that I
> am not familiar with and a google search helped little (at
> least for me)
> helium alpha point - what is it?
> How does one magnetical cool below 1K?
>
> Tim O'Donnell
> Celina High School
> odonnt@celina.k12.oh.us