Alpha Decay of ${}^{255}{No}$ and ${}^{257}{No}$

The

α

decay of

{}^{255}{No}

and

{}^{257}{No}

produced by

{}^{249}{Cf} ({}^{12}C, α 2 n) {}^{255}{No}

and

{}^{248}{Cm} ({}^{13}C, 4 n) {}^{257}{No}

reactions, respectively, has been studied. Five

α

-particle groups with energies and intensities 8.30 (3%), 8.25 (6%), 8.11 (57%), 7.92 (19%), and 7.76 MeV (15%) were assigned to

{}^{255}{No}

; and three

α

-particle groups with energies 8.32, 8.27, and 8.22 MeV to

{}^{257}{No}

. The half-lives of

{}^{255}{No}

and

{}^{257}{No}

were measured to be 200±10 and 26 ± 2 sec, respectively. The decay schemes of

{}^{255}{No}

and

{}^{257}{No}

are discussed.

This publication has 6 references indexed in Scilit:

Alpha Decay ofNo255andNo257