Fine structure in the
decay of
At
Atの
崩壊の微細構造
Cubiss, J. G.*; Andreyev, A. N.; Barzakh, A. E.*; Andel, B.*; Antalic, S.*; Cocolios, T. E.*; Day Goodacre, T.*; Fedorov, D. V.*; Fedosseev, V. N.*; Ferrer, R.*; Fink, D. A.*; Gaffney, L. P.*; Ghys, L.*; Huyse, M.*; Kalaninov
, Z.*; K
ster, U.*; Marsh, B. A.*; Molkanov, P. L.*; Rossel, R. E.*; Rothe, S.*; Seliverstov, M. D.*; Sels, S.*; Sj
din, A. M.*; Stryjczyk, M.*; Truesdale, V. L.*; Van Beveren, C.*; Van Duppen, P.*; Wilson, G. L.*
Cubiss, J. G.*; Andreyev, A. N.; Barzakh, A. E.*; Andel, B.*; Antalic, S.*; Cocolios, T. E.*; Day Goodacre, T.*; Fedorov, D. V.*; Fedosseev, V. N.*; Ferrer, R.*; Fink, D. A.*; Gaffney, L. P.*; Ghys, L.*; Huyse, M.*; Kalaninov
, Z.*; K
ster, U.*; Marsh, B. A.*; Molkanov, P. L.*; Rossel, R. E.*; Rothe, S.*; Seliverstov, M. D.*; Sels, S.*; Sj
din, A. M.*; Stryjczyk, M.*; Truesdale, V. L.*; Van Beveren, C.*; Van Duppen, P.*; Wilson, G. L.*
Atの
崩壊について、CERN-ISOLDE施設においてレーザーイオン化法を使うことで研究した。
-
同時計数データを初めて取得し、より精度の良い半減期の値として1.27(6)秒を得た。
崩壊の微細構造を基に新しい
崩壊図式を構築した。それらの結果から、
Atの基底状態のスピン・パリティは(3
)がより確からしいことが解ったが、(2)
の可能性も完全には否定しきれない。
An
decay of
At was studied at the CERN-ISOLDE facility using a laser-ionization technique. Coincidence
-
data were collected for the first time and a more precise half-life value of T
= 1.27(6) s was measured. A new
-decay scheme was deduced based on the fine-structure of the
decay. The results lead to a preferred spin and parity assignment of J
= (3
) for the ground state of
At; however, J
= (2)
cannot be fully excluded.