01439nas a2200157   4500008004100000245009000041210006900131260000800200300001200208490001000220520088100230100001701111700001801128700001601146856011901162       2017                        eng d00aAuger decay rates of core hole states using equation of motion coupled cluster method0 aAuger decay rates of core hole states using equation of motion c  cJAN  a160-1640 v482  3 aThe recent development of Linac coherent light source high intense X-ray laser makes it possible to create double core ionization in the molecule. The generation of double core hole state and its decay is identified by Auger spectroscopy. The decay of this double core hole (DCH) states can be used as a powerful spectroscopic tool in chemical analysis. In the present work, we have implemented a promising approach, known as CAP-EOMCC method, which is a combination of complex absorbing potential (CAP) and equation -of-motion coupled cluster (EOMCC) approach to calculate the lifetime of single and double core hole states. We have applied this method to calculate the lifetime of the single core hole (K-LL) and double core hole (KK-KLL) states of CH4, NH3 and HF molecules. The predicted lifetime is found to be extremely short. (C) 2016 Elsevier B.V. All rights reserved.1 aGhosh, Aryya1 aVaval, Nayana1 aPal, Sourav  uhttps://library.ncl.res.in/content/auger-decay-rates-core-hole-states-using-equation-motion-coupled-cluster-method