Dumitriu, I.Bilodeau, R. C.Gorczyca, T. W.Walter, C. W.Gibson, N. D.Rolles, D.Pešić, Z. D.Aguilar, A.Berrah, N.2020-06-172020-06-172017-08-02https://hdl.handle.net/2097/40737Inner-shell photodetachment from Ni−([Ar]3d94s2) leading to Ni+,Ni2+, and Ni3+ ion production was studied near and above the 3p excitation region, in the 60–90 eV photon energy range, using a merged ion-photon beam technique. The absolute photodetachment cross section of Ni− leading to Ni+ ion production was measured. The 3p→3d photoexcitation in Ni− gives rise to a giant Feshbach resonance. In the near-threshold region, a Fano profile, modified by a Wigner s-wave (l=0) threshold law, accurately fits the Ni− single-photodetachment cross section. A lower-order R-matrix calculation shows overall agreement with essential features of the experimental data, confirming the nature of the strong, asymmetric Fano profile of the giant 3p→3d photoexcitation-autodetachment resonance in Ni−.This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).https://rightsstatements.org/page/InC/1.0/?language=enhttps://journals.aps.org/authors/transfer-of-copyright-agreementPhotodetachmentAtomic, Molecular & Opticalion productionText