Is determination of nuclidic mass by nuclear reaction currently state of the art for any nuclides?

In Section 4.9 of Linus Pauling's General Chemistry Book (Dover 1988 edition, a copy of the WH Freeman and Company 1970 edition) he describes the principle behind the determination of nuclidic mass by nuclear reaction, giving the following beta decay reaction as an example for the determination of the mass of $\ce{{}^{40}\_{19}K\_{21}}$:


$$\ce{{}^{40}\_{19}K\_{21} -> {}^{40}\_{20}Ca\_{20}^+ + e^-}$$


I was wondering if nuclidic masses determined this way remain state of the art (the origin of the currently accepted value of the mass) for any nuclides? More generally, how important is the technique currently?


