The isotopes of thulium range in atomic weight from 144.97007 u ( 145 Tm ) to 178.95534 u ( 179 Tm ).
32.
Thulium was so rare that none of the early workers had enough of it to purify sufficiently to actually see the green color; they had to be content with Durham.
33.
The primary decay products of ytterbium isotopes lighter than 174 Yb are thulium isotopes, and the primary decay products of ytterbium isotopes with heavier than 174 Yb are lutetium isotopes.
34.
Three other lanthanides ( holmium ( Ho ), thulium ( Tm ) and gadolinium ( Gd ) ) can also trace their discovery to the same quarry .-->
35.
Samples of YLF and YAG crystals doped with erbium, thulium, and holmium are being studied with selective laser excitation in the region of 780 nm, the erbium bands.
36.
Photons reaching the K-absorption edge of gadolinium may be delivered by thulium ( Tm ) K-emissions using a transmission X-ray tube with a thulium target.
37.
Photons reaching the K-absorption edge of gadolinium may be delivered by thulium ( Tm ) K-emissions using a transmission X-ray tube with a thulium target.
38.
The spherical shell model fairly accurately predicts the energies of protons emitted by unstable isotopes ( forms ) of nuclei containing between 69 protons ( thulium ) and 81 protons ( thallium ).
39.
In those compounds, thulium exhibits valence states + 2 and + 3, however, the + 3 state is most common and only this state has been observed in thulium solutions.
40.
In those compounds, thulium exhibits valence states + 2 and + 3, however, the + 3 state is most common and only this state has been observed in thulium solutions.
