Hyperfine Structure of the Ground State ofHe+3by the Ion-Storage Exchange-Collision Technique

Nuclear effects in atomic transitions

“…This illustrates the potential for extending ground state HFS investigation to H-like ions, due to the simplicity of the theoretical modeling for one-electron systems. However, the microwave measurement of the 1s splitting in 3 He + [58] has not been followed by further steps towards higher-Z ions, mainly due to difficulties in producing and storing highly charged ions. Obviously, due to the energy splitting dependence on Z 3 , the HFS transitions in highly charged ions are also no longer accessible to microwave spectroscopy.…”

g -Factor of electron centered in symmetric cavity

“…That such trap cavities may have appreciable quality factors at microwave frequencies has been realized and put to good use in early spectroscopy experiments on stored ions (6 To gain some insight into this problem, we model (7) the cyclotron motion in a cylindrical cavity of variable size by a series Ic circuit resonant at c(c (of inductance 1 and capacitance c) connected across the center of a loss-free two-wire transmission line section of variable length L. The line section is short-circuited at both ends and forms a resonator that is the analog of the cylindrical cavity. In the center the resonator has an input impedance Z = Z(L), which is half as large as that of a single half-section (8), Z = (jZo/2) tan(irL/Xc), [2] When the line section is loss-free and infinitely long the resulting closed 1cZ circuit will show a damped parallel resonance at a frequency wcc very little different from wc because Z = ZO/2 is purely resistive and <<«CI.…”

Superposition, entanglement, and raising Schrödinger's cat

“…We didn't anticipate all of the uses of laser cooling at the time, but it was clear that it would be important for high-resolution spectroscopy of trapped ions. For example, the largest systematic uncertainty in the 3 He + experiment [8] was the uncertainty in the time dilation shift, which would be reduced with cooling.…”

“…Therefore, in a heroic set of experiments, state preparation was accomplished through charge exchange with a polarized Cs beam that passed through the ions. Detection was accomplished through a charge-transfer process ( 3 He + +Cs→ 3 He+Cs + ) that depended on the internal state of 3 He + , followed by detection of the depleted 3 He + ion number by observing the ions' induced currents in the trap electrodes [7,8].…”