Consistent account of deuteron-induced reactions on Cr-nat up to 60 MeV

0493746 - ÚJF 2019 RIV US eng J - Článek v odborném periodiku
Šimečková, Eva - Avrigeanu, M. - Fischer, U. - Mrázek, Jaromír - Novák, Jan - Štefánik, Milan - Costache, C. - Avrigeanu, V.
Consistent account of deuteron-induced reactions on Cr-nat up to 60 MeV.
Physical Review C. Roč. 98, č. 3 (2018), č. článku 034606. ISSN 2469-9985. E-ISSN 2469-9993
Grant CEP: GA MŠMT(CZ) EF16_013/0001679; GA MŠMT LM2015076
Institucionální podpora: RVO:61389005
Klíčová slova: breakup * direct reactions * pre-equilibrium emission
Obor OECD: Nuclear physics
Impakt faktor: 3.132, rok: 2018

Specific noncompound processes such as breakup (BU) and distinct direct reactions (DR) make deuteron-induced reactions different from reactions with other incident particles. Significant discrepancies with measured cross sections were caused by taking into account only the pre-equilibrium emission (PE) and compound-nucleus (CN) mechanisms while microscopic calculation of inclusive BU and DR cross sections is still investigated numerically. Thus, reaction cross sections recommended most recently for high-priority elements are still based on data fit.
Accurate new measurements of low-energy deuteron-induced reaction cross sections for natural Cr target can enhance the related database and the opportunity for a unitary and consistent account of the involved reaction mechanisms.
The new measured activation excitation functions proved essential for the enrichment of the deuteron database, while the theoretical analysis of all available data strengthens for the first time their consistent account, provided that a suitable BU and DR assessment is completed by the assumption of PE and CN contributions corrected for decrease of the total-reaction cross section due to the leakage of the initial deuteron flux towards BU and DR processes.
The suitable description of nuclear mechanisms involved within deuteron-induced reactions on chromium, taking into account especially the BU and DR direct processes, is validated by an overall agreement of the calculated and measured cross sections, including particularly the new experimental data at low energies.
Trvalý link: http://hdl.handle.net/11104/0287068