Jisho.org: Japanese Dictionary

じはつかくぶんれつ自発核分裂

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Noun

1. spontaneous fission

Wikipedia definition

2. Spontaneous fissionSpontaneous fission (SF) is a form of radioactive decay that is found only in very heavy chemical elements. Because the nuclear binding energy of the elements reaches its maximum at an atomic mass number greater than about 58 atomic mass units (u), spontaneous breakdown into smaller nuclei and a few isolated nuclear particles becomes possible at heavier masses.
Read “Spontaneous fission” on English Wikipedia
Read “自発核分裂” on Japanese Wikipedia
Read “Spontaneous fission” on DBpedia

0.08287594053287778

6 strokes. JLPT N4. Jōyō kanji, taught in grade 2.

自

oneself

Kun: みずか.ら、おの.ずから、おの.ずと

On: ジ、シ

0.2093707971356912

9 strokes. JLPT N4. Jōyō kanji, taught in grade 3.

発

departure, discharge, publish, emit, start from, disclose, counter for gunshots

Kun: た.つ、あば.く、おこ.る、つか.わす、はな.つ

On: ハツ、ホツ

2.7625313510959253

10 strokes. JLPT N1. Jōyō kanji, taught in junior high.

核

nucleus, core, kernel

On: カク

0.13958053142379412

4 strokes. Jōyō kanji, taught in grade 2.

分

part, minute of time, segment, share, degree, one's lot, duty, understand, know, rate, 1%, chances, shaku/100

Kun: わ.ける、わ.け、わ.かれる、わ.かる、わ.かつ

On: ブン、フン、ブ

6.054305550507071

12 strokes. JLPT N1. Jōyō kanji, taught in junior high.

裂

split, rend, tear

Kun: さ.く、さ.ける、 -ぎ.れ

On: レツ

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