## https://en.wikipedia.org/wiki/Liquid_helium

$\rho_{He^3} = (1/8) \rho_{water} \approx 0.12 g/cm^3$

## https://en.wikipedia.org/wiki/Liquid_helium

http://ltl.tkk.fi/research/theory/helium.html

http://fy.chalmers.se/~delsing/LowTemp/LectureNotes/LectureNotes13.PDF

## 1992 [specific heat of He-3](https://link.springer.com/chapter/10.1007%2F978-94-011-2276-4_6)

- https://www.chemteam.info/Mole/Moles-to-Grams.html

- http://old.iupac.org/publications/books/gbook/green_book_2ed.pdf

## Fermi energy  https://en.wikipedia.org/wiki/Fermi_energy

https://onlinelibrary.wiley.com/doi/pdf/10.1002/phbl.19760321214
$T_F = 1.5 K$


## superfluid transitions [The extraordinary phases of liquid 3-He - David M. Lee](https://cdn.journals.aps.org/files/RevModPhys.69.645.pdf)

http://fy.chalmers.se/~delsing/LowTemp/LectureNotes/LectureNotes13.PDF

- specific heat

1973 [Observation of a Second-Order Phase Transition and Its Associated Phase Diagram in Liquid He3](https://knowen-production.s3.amazonaws.com/uploads/attachment/file/5533/phase%2Btransitions.pdf) R. A. Webb, T. J. Greytak, R. T. Johnson, and J. C. Wheatley

1981 [Specific Heat of Normal and Superfluid 3He](https://knowen-production.s3.amazonaws.com/uploads/attachment/file/5534/alvesalo.pdf)


- 1974 [“Fourth sound” in helium‐three confirms superfluidity]()?

https://physicstoday.scitation.org/doi/10.1063/1.3128530