Soumyajit Saha
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View article: Interfacing the B-Spline R-Matrix and R-Matrix with Time Dependence Computer Codes: An Update
Interfacing the B-Spline R-Matrix and R-Matrix with Time Dependence Computer Codes: An Update Open
As a continuation of Schneider et al., Atoms 2022 10, 26, we report recent progress in the development and deployment of the interface between the computational codes B-Spline R-matrix (BSR) and R-Matrix with Time dependence (RMT). These a…
View article: R-matrix with time-dependence calculations for three-sideband RABBITT in helium
R-matrix with time-dependence calculations for three-sideband RABBITT in helium Open
Following up on a recent paper [Bharti et al., Phys. Rev. A 109 (2024) 023110], we compare the predictions from severalR-matrix with time-dependence calculations for a modified three-sideband version of the "reconstruction of attosecond be…
View article: Multi-sideband interference structures by high-order photon-induced continuum-continuum transitions in helium
Multi-sideband interference structures by high-order photon-induced continuum-continuum transitions in helium Open
Following up on a previous paper on two-color photoionization of Ar(3p) [D. Bharti , ], we present measurements and calculations for a modified three-sideband (3-SB) version of the reconstruction of attosecond beating by interference of tw…
View article: Angular anisotropy parameters for photoionization delays
Angular anisotropy parameters for photoionization delays Open
Anisotropy parameters describing the angular dependence of the photoionization delay are defined. The formalism is applied to results obtained with the relativistic random phase approximation with exchange for photoionization delay from th…
View article: Effects of relativistic interactions in photodetachment time delay of Br<sup>−</sup>
Effects of relativistic interactions in photodetachment time delay of Br<sup>−</sup> Open
Synopsis Wigner time delay in photodetachment of Br − has been studied. The absence of Coulomb phase in photodetachment process makes the Wigner time delay more sensitive to the centrifugal barrier shape resonance and threshold effects. Im…
View article: Dominance of correlation and relativistic effects on photodetachment time delay well above threshold
Dominance of correlation and relativistic effects on photodetachment time delay well above threshold Open
In this work, Wigner time delay in photodetachment from the 3p3/2 and 3p1/2 subshells of Cl- has been studied in the vicinity of the 2p3/2 and 2p1/2 thresholds, using the relativistic random phase approximation (RRPA). The results show tim…
View article: Wigner time delay in photodetachment
Wigner time delay in photodetachment Open
Using Cl- as a test case,Wigner time delay in the photodetachment process has been investigated theoretically, along with the photoionization of the isoelectronic Ar atom, for the outer 3p shell using the relativistic-random-phase approxim…
View article: Dipole phase and photoelectron group delay in inner-shell photoionization
Dipole phase and photoelectron group delay in inner-shell photoionization Open
We conduct a systematic study of the dipole phase and the photoelectron group delay (Wigner time delay) in inner shell photoionization of noble gas atoms from Ne to Xe. Our study encompasses the tender x-ray spectral range and extends to 1…
View article: Wigner time delay studies of photoionization of atomic zinc and cadmium
Wigner time delay studies of photoionization of atomic zinc and cadmium Open
Wigner time delay has been studied in the shape resonance region for the outer nd→εf photoionization transitions in atomic Zn and Cd.
View article: Wigner time delay in quadrupole photoionization channels of atomic Hg
Wigner time delay in quadrupole photoionization channels of atomic Hg Open
Time delay in quadrupole (E2) channels is studied in atomic Hg using the Relativistic Random Phase Approximation. Interchannel coupling is found to be extremely important and large time delays are found in the region of quadrupole (E2) Coo…