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We investigate the angular momentum removal from fission fragments (FFs)through neutron and $\gamma$-ray emission, where we find that about half theneutrons are emitted with angular momenta $\ge 1.5\hbar$ and that the change inangular momentum after the emission of neutrons and statistical $\gamma$ raysis significant, contradicting usual assumptions. Per fission event, in oursimulations, the neutron and statistical $\gamma$-ray emissions change the spinof the fragment by 3.5 -- 5~$\hbar$, with a large standard deviation comparableto the average value. Such wide angular momentum removal distributions can hideany underlying correlations in the fission fragment initial spin values. Withinour model, we reproduce data on spin measurements from discrete transitionsafter neutron emissions, especially in the case of light FFs. The agreementfurther improves for the heavy fragments if one removes from the analysis theevents that would produce isomeric states. Finally, we show that while in ourmodel the initial FF spins do not follow a saw-tooth like behavior observed inrecent measurements, the average FF spin computed after neutron and statistical$\gamma$ emissions exhibits a shape that resembles a saw tooth. This suggeststhat the average FF spin measured after statistical emissions is notnecessarily connected with the scission mechanism as previously implied.

Angular momentum removal by neutron and $\gamma$-ray emissions during fission fragment decays