# Timing analysis of two-electron photoemission

@article{Kheifets2011TimingAO, title={Timing analysis of two-electron photoemission}, author={Anatoli S. Kheifets and Igor A Ivanov and Igor Bray}, journal={Journal of Physics B: Atomic, Molecular and Optical Physics}, year={2011}, volume={44}, pages={101003} }

We predict a significant delay of two-electron photoemission from the helium atom after absorption of an attosecond XUV pulse. We establish this delay by solving the time-dependent Schrödinger equation and by subsequently tracing the field-free evolution of the two-electron wave packet. This delay can also be related to the energy derivative of the phase of the complex double-photoionization (DPI) amplitude which we evaluate by using the convergent close-coupling method. Our observations…

## 14 Citations

### Double ionization probed on the attosecond timescale

- Physics, Chemistry
- 2014

Double ionization following the absorption of a single photon is one of the most fundamental processes requiring interaction between electrons(1-3). Information about this interaction is usually…

### Theory of attosecond time delay in double photoionization of noble gas atoms

- Physics
- 2013

We present a theoretical interpretation of attosecond time-delays in double photoionization (DPI) measured in XUV-pump and IR-probe experiments using coincidence detection. The so-called Wigner time…

### Probing time-ordering in two-photon double ionization of helium on the attosecond time scale

- Physics
- 2015

We show that time ordering underlying time-dependent quantum dynamics is a physical observable accessible by attosecond streaking. We demonstrate the extraction of time ordering for the prototypical…

### Where does atomic photoionization begin ?

- Physics
- 2011

We perform a time-delay analysis of of strong field ionization of atomic hydrogen in the tunnelling regime. We obtain the values of the time delay from the quantum-mechanical calculation involving…

### Shake-Off Process in Non-Sequential Single-Photon Double Ionization of Closed-Shell Atomic Targets

- PhysicsAtoms
- 2022

Amusia and Kheifets in 1984 introduced a Green’s function formalism to describe the effect of many-electron correlation on the ionization spectra of atoms. Here, we exploit this formalism to model…

### Theoretical analysis of time delays and streaking effects in XUV photoionization

- Physics
- 2013

Abstract We apply a recently proposed theoretical concept and numerical approach to obtain time delays in extreme ultraviolet (XUV) photoionization of an electron in a short- or long-range potential.…

### Numerical simulation of time delays in light-induced ionization

- Physics
- 2013

(Received 23 November 2012; published 27 March 2013)We apply a fundamental deﬁnition of time delay, as the difference between the time a particle spends withina ﬁnite region of a potential and the…

### Taking the Convergent Close-Coupling Method beyond Helium: The Utility of the Hartree-Fock Theory

- PhysicsAtoms
- 2022

The convergent close-coupling (CCC) method was initially developed to describe electron scattering on atomic hydrogen and the hydrogenic ions such as He+. The latter allows implementation of double…

### Double ionization probed on the attosecond time scale: Supplementary Methods, Figures S1–S2, Table S1 and References

- Physics
- 2014

The Supplementary Methods contains four sections: (1) experimental methods, (2) simulation of twoelectron coincidence spectra, (3) methods for experimental time analysis and (4) theory of time delays…

## References

SHOWING 1-10 OF 24 REFERENCES

### Probing single-photon ionization on the attosecond time scale.

- PhysicsPhysical review letters
- 2011

The determination of photoemission time delays requires taking into account the measurement process, involving the interaction with a probing infrared field, and this contribution can be estimated using a universal formula and is found to account for a substantial fraction of the measured delay.

### Delay in atomic photoionization.

- PhysicsPhysical review letters
- 2010

It is argued that the extreme ultraviolet pulse alone cannot produce such a large time delay and it is the streaking IR field that is most likely responsible for this effect.

### Use of electron correlation to make attosecond measurements without attosecond pulses.

- PhysicsPhysical review letters
- 2005

To reconstruct the dynamics of correlated two-electron ionization with attosecond precision, not only classical time and energy correlation, but also entanglement between the two electrons is used.

### The two-electron attosecond streak camera for time-resolving intra-atomic collisions

- Physics
- 2010

We generalize the one-electron attosecond streak camera to time-resolve the correlated two-electron escape dynamics during a collision process involving a deep core electron. The collision process is…

### Delay in Photoemission

- PhysicsScience
- 2010

Ultrafast metrology reveals a 20-attosecond delay between photoemission from different electronic orbitals in neon atoms and theoretical models refined with the help of attosecond timing metrology may provide insight into electron correlations and allow the setting of the zero of time in atomic-scale chronoscopy with a precision of a few attose Cond.

### Strong-field ionization of lithium

- Physics
- 2011

We report photoelectron energy spectra, momentum, and angular distributions for the strong-field single ionization of lithium by 30-fs laser pulses. For peak intensities between 10{sup 11} and 10{sup…

### Atomic transient recorder

- PhysicsNature
- 2004

With the current ∼750-nm laser probe and ∼100-eV excitation, the transient recorder is capable of resolving atomic electron dynamics within the Bohr orbit time.

### Attosecond Ionization and Tunneling Delay Time Measurements in Helium

- PhysicsScience
- 2008

The technique relies on establishing an absolute reference point in the laboratory frame by elliptical polarization of the laser pulse, from which field-induced momentum shifts of the emergent electron can be assigned to a temporal delay on the basis of the known oscillation of the field vector.

### Symmetrized amplitudes of the helium-atom double photoionization

- Physics
- 2002

The symmetrized gerade and ungerade amplitudes of the helium atom double photoionization are extracted from the convergent close-coupling calculations at fixed excess energies of 9, 20, 40, and 60 eV…

### Calculation of double photoionization of helium using the convergent close-coupling method.

- PhysicsPhysical review. A, Atomic, molecular, and optical physics
- 1996

We use the convergent close-coupling formalism to calculate the double-to-single-photoionization cross-section ratio in helium for photon energies from threshold up to 400 eV. Our results for the…