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11  págs.; 6 figs.; 4 tabs.We analyse a time series of optical spectra of SN 2014J from almost two weeks prior to maximum to nearly four months after maximum. We perform our analysis using the SYNOW code, which is well suited to track the distribution of the ions with velocity in the ejecta. We show that almost all of the spectral features during the entire epoch can be identified with permitted transitions of the common ions found in normal supernovae (SNe) Ia in agreement with previous studies. We show that 2014J is a relatively normal SN Ia. At early times the spectral features are dominated by Si II, S II, Mg II, and Ca II. These ions persist to maximum light with the appearance of Na I and Mg I. At later times iron-group elements also appear, as expected in the stratified abundance model of the formation of normal Type Ia SNe. We do not find significant spectroscopic evidence for oxygen, until 100 d after maximum light. The +100 d identification of oxygen is tentative, and would imply significant mixing of unburned or only slight processed elements down to a velocity of 6000 kms-1. Our results are in relatively good agreement with other analyses in the infrared. We briefly compare SN 2011fe to SN 2014J and conclude that the differences could be due to different central densities at ignition or differences in the C/O ratio of the progenitors. 2016 The Authors ; Published by Oxford University Press on behalf of the Royal Astronomical SocietyThe work has been supported in part by support for\udprogramme HST-GO-12948.004-A provided by NASA through a\udgrant from the Space Telescope Science Institute, which is operated\udby the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. EB acknowledges\udsupport from a Carl Bush Fellowship from the University of Oklahoma.\udSupport for LG is provided by the Ministry of Economy,\udDevelopment, and Tourism’s Millennium Science Initiative\udthrough grant IC120009, awarded to The Millennium Institute\udof Astrophysics, MAS. LG acknowledges support by CONICYT\udthrough FONDECYT grant 3140566. JIGH acknowledges financial\udsupport from the Spanish Ministry of Economy and Competitiveness\ud(MINECO) under the 2011 Severo Ochoa programme\udMINECO SEV-2011-0187, and the 2013 Ramon y Cajal programme\udMINECO RYC-2013-14875, and the Spanish ministry\udproject MINECO AYA2014-56359-P. ID acknowledges MINECOFEDER\udgrant AYA2011-22460.Peer Reviewe

Supernova 2014J at M82 – II. Direct analysis of a middle-class Type Ia supernova