Problem with gradual absorption in MSD/MSC calculations
| العنوان: | Problem with gradual absorption in MSD/MSC calculations |
|---|---|
| المؤلفون: | Herman, Michal W., Kawano, Toshihiko |
| سنة النشر: | 2024 |
| المجموعة: | SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
| الوصف: | Replacing classical exciton model with the better founded Multi-step Direct (MSD) and Multistep Compound (MSC) mechanisms has been impeded by incapability of the latter models to describe central part of the neutron emission spectra at incident neutron energies of about 14 MeV and above. We have ascribed this deficiency to the decrease of absorption to the MSC mechanism resulting from the concept of gradual absorption. We were able to obtain very good reproduction of experimentally measured neutron spectra using MSD/MSC calculations when this option was turned off. Such treatment is, however, at odds with the fundamental distinction between MSD and MSC mechanisms that should proceed through the chain of open (P-space) and closed (Q-space) configurations respectively. By blocking gradual absorption we allow the first stage of MSC to be fully populated from the incident channel that at higher incident energies is impossible. We discuss various attempts of addressing the problem that, so far, remains open. In addition, we present an evidence for much tighter spin distribution of particle-hole states than normally assumed. |
| نوع الوثيقة: | other/unknown material |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | http://www.osti.gov/servlets/purl/2377303; https://www.osti.gov/biblio/2377303; https://doi.org/10.2172/2377303 |
| DOI: | 10.2172/2377303 |
| الاتاحة: | http://www.osti.gov/servlets/purl/2377303 https://www.osti.gov/biblio/2377303 https://doi.org/10.2172/2377303 |
| رقم الانضمام: | edsbas.909BEB8 |
| قاعدة البيانات: | BASE |
| DOI: | 10.2172/2377303 |
|---|