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The first absolute (e,3e) measurements, by Lahmam-Bennani et al [Phys. Rev. A{\bf 59}, 3548 (1999)], have been recently approximately reproduced by Berakdar[Phys. Rev. Lett. {\bf 85}, 4036 (2000)] and supported by Jones and Madison[Phys. Rev. Lett. {\bf 91}, 07321 (2003)], but with widely differingconclusions. The former indirectly implied that the Born-CCC-based calculationsof Kheifets et al [J. Phys. B {\bf 32}, 5047 (1999) were invalid due to thereliance on the 1st Born approximation. The latter argued that the 1st Bornapproximation was valid, but the wrong initial state was used. We investigatethese claims and find that the original calculations of Kheifets et al arereproduced whether the 2nd Born approximation is incorporated or if we use aground state similar to that of Jones and Madison, but appropriately correctedas done by Le Sech and co-workers [J. Phys. B {\bf 23}, L739 (1990)].Comment: 4 pages, 3 figure

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Convergent calculations of double ionization of helium: From<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi>γ</mml:mi><mml:mo>,</mml:mo><mml:mn>2</mml:mn><mml:mi>e</mml:mi></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi>e</mml:mi><mml:mo>,</mml:mo><mml:mn>3</mml:mn><mml:…

Convergent calculations of double ionization of helium: From(γ,2e)to(e,3