Measurement of $L$-shell fluorescence yields of some elements in the atomic range $65<~Z<~74$ using photoionization

$L$-shell fluorescence yields were measured for seven elements Tb, Dy, Ho, Er, Yb, Ta, and W using a Ge(Li) detector. The targets were excited using 59.5-keV γ rays from ${\mathrm{Am}}^{241}$ radioactive source of strengths 100 mCi. The results obtained were compared with the theoretical values and other measured values. It is shown that the present results are in good agreement with earlier experimental and theoretical results.