Photoionization of Endohedrally Confined Ca (Ca@C60)

Two-photon photoionization of the Ca 4s3d

We report an optical dipole trap for calcium. The trap is created by focusing a 488-nm argon-ion laser beam into a calcium magneto-optical trap. The argon-ion laser photoionizes atoms in the trap because of a nearresonance with the 4s4f F3 level. By measuring the dipole-trap decay rate as a function of argon-ion laser intensity, we determine the F3 photoionization cross section at our wavelengt...

Time delay in the recoiling valence photoemission of ar endohedrally confined in C60.

The effects of confinement and electron correlations on the relative time delay between the 3s and 3p photoemissions of Ar confined endohedrally in C60 are investigated using the time-dependent local density approximation--a method that is also found to mostly agree with recent time delay measurements between the 3s and 3p subshells in atomic Ar. At energies in the neighborhood of 3p Cooper min...

Photoionization of Ca in a static electric field

T. K. Fang,1,* J. I. Lo,2 T. S. Yih,2 and T. N. Chang3 1Department of Physics, Fu Jen Catholic University, Taipei, Taiwan 242, Republic of China 2Department of Physics, National Central University, Chungli, Taiwan 32001, Republic of China 3Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089-0484, USA (Received 28 September 2010; published 7 Dece...

Endohedrally stabilized C70 isomer with fused pentagons characterized by crystallography.

Besides the conventional D5h(8149)-C70 fullerene, there are a large number of C70 isomers that violate the isolated pentagon rule (IPR). However, these non-IPR C70 fullerenes have been less investigated owing to their low stabilities or high reactivities. In this study, we report for the first time the X-ray structure of an unconventional endohedral C70 fullerene, Sc2O@C2(7892)-C70. The combine...

Double Photoionization of Atoms