F チュウシン ハッコウ ノ ジバ ヘンカ ノ チョクセツ ソクテイ ニヨル チョウビサイ ソウゴ サヨウ シンゴウ ノ ケンシュツ

Abstract

Without microwave and rf field, we have optically detected the hyperfine (hf) signal of F centers in KCl at 4 K in a magnetic field range below 3.1 kOe. The hf signals were observed by the magnetic field dependence of F center luminescence. The angle dependence of hf signals was observed precisely for the first time. We determined the hf constant of Cl nuclei at the fourth and eighth shells, and K nucleus at ninth shell for the relaxed excited state (RES). They may due to the 2 s-like wave function in the RES of the F center