Lifetime of the 3464-keV level in ${}^{40}{Ar}$

Direct electronic timing has been used to measure the mean life of the 3464-keV state in

{}^{40}{Ar}

. The state was populated by the

{}^{37}{Cl} (α, p) {}^{40}{Ar}

reaction at 10.6 MeV, and the mean life was determined to be 1.00 ± 0.03 nsec. The measured lifetime in conjunction with other

γ

-ray angular distributions and previous

{}^{38}{Ar} (t, p) {}^{40}{Ar}

results allows an assignment of

J^{π} = 6^{+}

to the level. The

E 2

transition strengths of the

{}^{40}{Ar}

6^{+}

→

4^{+}

4^{+}

→

2^{+}

′ and

2^{+}

→

0^{+}

transitions are compared to those in

{}^{42}{Ca}

and to a weak-coupling calculation.

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Lifetime of the 3464-keV level inAr40