We report an experiment on recoil-ion momentum spectroscopy of ${\mathrm{Rb}}^{+}$ ions formed by two-photon ionization of ${\mathrm{Rb}}^{2}{P}_{3/2}$ at 790 nm. Laser-cooled atoms in a magneto-optic trap are used as the target in time-of-flight analysis of the recoil momentum. We demonstrate a resolution of 1 \ensuremath{\mu}eV with a limiting momentum resolution below $\ensuremath{\delta}p=0.05$ a.u. We also show the use of the photoionization technique for the characterization of cold atomic samples.We report an experiment on recoil-ion momentum spectroscopy of ${\mathrm{Rb}}^{+}$ ions formed by two-photon ionization of ${\mathrm{Rb}}^{2}{P}_{3/2}$ at 790 nm. Laser-cooled atoms in a magneto-optic trap are used as the target in time-of-flight analysis of the recoil momentum. We demonstrate a resolution of 1 \ensuremath{\mu}eV with a limiting momentum resolution below $\ensuremath{\delta}p=0.05$ a.u. We also show the use of the photoionization technique for the characterization of cold atomic samples.

Physical Review ASep 18, 200027 citations

Laser-cooled and trapped atoms as a precision target for heavy ion beams

U. Schünemann, Inka B. Manek-Hönninger, Rudolf Grimm +2 more

Hyperfine InteractionsDec 1, 19964 citations

A new magneto-optical trap-target recoil ion momentum spectroscopy apparatus for ion-atom collisions and trapped atom studies

J. Blieck, X. Fléchard, A. Cassimi +3 more

A new magneto-optical trap-target recoil ion momentum spectroscopy apparatus has been built and tested at the LPC-CAEN. Dedicated to ion-atom collisions studies and excited fraction measurements, the setup combines a projectile ion beam line, a target of cold rubidium atoms provided by a magneto-optical trap (MOT), and a recoil ion momentum spectrometer. In a test experiment using a beam of Na(+) projectiles, we demonstrate its capability to measure, with a very high signal over background ratio, fully differential cross sections in scattering angle, initial state, and final state of the system. We detail, in this work, features that had not been described previously in the literature: an extraction of the recoil ions transverse to the ion beam axis, and a fast switch for the MOT magnetic field. Advantages of transverse versus longitudinal extraction are discussed, and future possibilities for the setup are presented.A new magneto-optical trap-target recoil ion momentum spectroscopy apparatus has been built and tested at the LPC-CAEN. Dedicated to ion-atom collisions studies and excited fraction measurements, the setup combines a projectile ion beam line, a target of cold rubidium atoms provided by a magneto-optical trap (MOT), and a recoil ion momentum spectrometer. In a test experiment using a beam of Na(+) projectiles, we demonstrate its capability to measure, with a very high signal over background ratio, fully differential cross sections in scattering angle, initial state, and final state of the system. We detail, in this work, features that had not been described previously in the literature: an extraction of the recoil ions transverse to the ion beam axis, and a fast switch for the MOT magnetic field. Advantages of transverse versus longitudinal extraction are discussed, and future possibilities for the setup are presented.

Review of Scientific InstrumentsOct 1, 200825 citations

We report an experiment on recoil-ion momentum spectroscopy of

{\mathrm{Rb}}^{+}

ions formed by two-photon ionization of

{\mathrm{Rb}}^{2}{P}_{3/2}

at 790 nm. Laser-cooled atoms in a magneto-optic trap are used as the target in time-of-flight analysis of the recoil momentum. We demonstrate a resolution of 1 \ensuremath{\mu}eV with a limiting momentum resolution below $\ensuremath{\delta}p=0.05$ a.u. We also show the use of the photoionization technique for the characterization of cold atomic samples.