In-beam $γ$ -ray studies of ${}^{151}{Dy}$ ( $N = 85$ )

Levels in

{}^{151}{Dy}

(

N = 85

) have been studied using the (

{}^{12}C

3 n

) reaction. Prompt and delayed

γ - γ

coincidences, excitation functions, and angular distributions were used to study the in-beam

γ

rays. Three

Δ I = 2

bands are observed: one built on the

\frac{7}{2^{-}}

ground state with transitions of 775 and 736 keV extending up to the

\frac{15}{2^{-}}

state, another on a

\frac{9}{2^{-}}

state at 527.1 keV extending to the

\frac{21}{2^{-}}

level, and a third on a

\frac{13}{2^{+}}

state at 968.3 keV extending to the

\frac{25}{2^{+}}

level. The energy spacings in the

h_{\frac{9}{2}}

and

f_{\frac{7}{2}}

bands resemble those in the core nucleus

{}^{150}{Dy}

. The two lowest transitions in the

i_{\frac{13}{2}}

band also resemble those in the

{}^{150}{Dy}

core while the

\frac{25}{2^{+}} \to \frac{21}{2^{+}}

transition has an energy close to that of the

6^{+}

→

4^{+}

transition in

{}^{152}{Dy}

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In-beamγ-ray studies ofDy151(N=85)