Campbell C J, Steele A V, Churchill L R, Depalatis M V, Naylor D E, Matsukevich D N, Kuzmich A, Chapman M S
School of Physics, Georgia Institute of Technology, Atlanta, GA 30332-0430, USA.
Phys Rev Lett. 2009 Jun 12;102(23):233004. doi: 10.1103/PhysRevLett.102.233004.
We have produced laser-cooled crystals of 232Th3+ in a linear rf Paul trap. This is the first time that a multiply charged ion has been laser cooled. Our work opens an avenue for excitation of the nuclear transition in a trapped, cold 229Th3+ ion. Laser excitation of nuclear states would establish a new bridge between atomic and nuclear physics, with the promise of new levels of metrological precision.
我们在直线射频保罗阱中制备出了激光冷却的232Th3+晶体。这是首次对多电荷离子进行激光冷却。我们的工作为在捕获的冷229Th3+离子中激发核跃迁开辟了一条途径。核态的激光激发将在原子物理和核物理之间建立一座新的桥梁，有望实现新的计量精度水平。
