Attosecond time delay in the photoionization of endohedral atoms<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>A</mml:mi><mml:mo>@</mml:mo><mml:msub><mml:mtext>C</mml:mtext><mml:mn>60</mml:mn></mml:msub></mml:math>: A probe of confinement resonances
P. C. DeshmukhDepartment of Physics, CPGS, Jain University, Bangalore 560011, IndiaAnkur MandalDepartment of Physics, Indian Institute of Technology Madras, Chennai 600036, IndiaSoumyajit SahaDepartment of Physics, Indian Institute of Technology Madras, Chennai 600036, IndiaA. S. KheifetsResearch School of Physics and Engineering, Australian National University, Canberra, Australian Capital Territories 0200, AustraliaV. K. DolmatovDepartment of Physics and Earth Science, University of North Alabama, Florence, Alabama 35632, USASteven T. MansonDepartment of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA
2014lv
ABI
Аннотация
The effects of confinement resonances on photoelectron group delay (Wigner time delay) following ionization of an atom encapsulated inside a ${\text{C}}_{60}$ cage have been studied theoretically using both relativistic and nonrelativistic random phase approximations. The results indicate clearly the resonant character of the confinement oscillations in time delay of the $4d$ shell of Xe@${\text{C}}_{60}$ and present a most direct manifestation of Wigner time delay. These oscillations were missed in a previous theoretical investigation of Ar@${\text{C}}_{60}$ [Phys. Rev. Lett. 111, 203003 (2013)].
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