Ac
Actinide
Actinium Koujou
Actinium Koujou
Element 89. Named from Greek ἀκτίς (aktis, ray), the namesake of the entire actinide series. Discovered by André-Louis Debierne in 1899. It spontaneously emits a pale blue glow in darkness. With a 21.7-year half-life — brief, yet it shines on as the founding light of 15 actinide elements
Personality Type: Type 3
Personality tendencies across 4 dimensions
内向 (I)28%外向 (E)
50
直観 (N)18%感覚 (S)
50
感情 (F)38%思考 (T)
50
知覚 (P)72%判断 (J)
50
Big Five Personality Traits
Personality analysis based on the 5-factor model
Alloy Characteristics
Personality traits from metal physical properties
Price & Economic Data
Market price and economic characteristics (as of 2026-02)
Price Range
Market Trends & Notes
Ac-225は標的α線治療（TAT）の臨床需要急増により価格が高騰中。DOEが大規模製造プログラムを推進しているが、現在は研究用マイクロキュリー単位の供給のみ。1μCiあたり数百〜数千ドル規模
Element Colors
Scientific basis of Actinium Koujou's colors
Colors of this element
銀白色
#C0C0C0
蒼白い自発発光
#87CEEB
Compatible Materials
Materials with good metallurgical and personality compatibility
Career Interests & Suggestions
Based on Holland Code: SIA
1st S - Social
2nd I - Investigative
3rd A - Artistic
1Counselor / Psychotherapist
2University Researcher / Scientist
3Social Worker / NPO Staff
4Author / Screenwriter
5Teacher / Educational Counselor
6Medical Researcher / Clinical Psychologist
Based on RIASEC (Holland Code) vocational interest model. These are illustrative suggestions derived from the character's personality profile.
Answer profile
See the 1-5 answer pattern that makes you this persona. Core 16 are free; other personas unlock with the full-persona quick diagnosis.