Hypothetical stable isotope of Promethium?

[Maximum7]

TL;DR

Discussing theoretical chemistry and what would it take to make artificial Promethium

Say one was to create an artificial stable isotope of Promethium as it has predicted applicable properties. What would it’s number have to be? I know Promethium-147 is semi-stable.

 

[Vanadium 50]

No isotope of promethium is stable.

 

[Maximum7]

No isotope of promethium is stable.

I’m aware. I was asking how; if they could make an artificial one. If it’s completely impossible fine; but I was thinking speculatively. Ray Kurzweil often said femtotech could create a new periodic table.

 

[Astronuc]

Summary: Discussing theoretical chemistry and what would it take to make artificial Promethium

I know Promethium-147 is semi-stable.

There is nothing that one could do 'chemically' to change the nuclear properties of a nucleus.

I would not consider ¹⁴⁷Pm with a half-life of 2.6234 y as being "semi-stable", nor ¹⁴⁶Pm (half life = 5.53 y), nor ¹⁴⁵Pm (half life = 17.7(4) y).

As V50 indicated, there are no stable isotopes of Pm.

Nature would have to change its Physics, which is beyond the realm of humanity.