0028269 - ÚJF 2006 RIV US eng J - Článek v odborném periodiku
Khouaja, A. - Villari, A. - Baiborodin, Dmitri - Dlouhý, Zdeněk - Savajols, H.
Reaction cross-sections and reduced strong absorption radii of nuclei in the vicinity of closed shells N=20 and N=28.
[Průřezy reakcí a redukované poloměry silné absorbce jader v okolí uzavřených slupek N=23 a N=28.]
European Physical Journal A. Roč. 25, - (2005), s. 223-226. ISSN 1434-6001. E-ISSN 1434-601X
Grant CEP: GA ČR GA202/04/0791
Výzkumný záměr: CEZ:AV0Z1048901
Klíčová slova: neutron-rich nuclei * deformation * isotopes
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 1.659, rok: 2005

Energy integrated reaction cross-section measurements of around sixty neutron-rich nuclei covering the region of closed shells N = 20 and N = 28 were performed at intermediate energy (30-65 A.MeV) using direct method. In this experiment, silicon detectors were used as active targets. The reduced strong absorption radii, r(0)(2), for 19 new nuclei (F-27, Ne-27,Ne-30, Na-33, Mg-28,Mg-34-35, Al36-38, Si38-40, P41-42, S42-44 and Cl-45) are deduced for the first time. An additional 60 radii, also measured in this experiment, are compared to results from literature. A new quadratic parametrization is proposed for the nuclear radius as a function of the isospin in the region of closed shells N = 8 and N = 28. According to this parametrization, the skin effect is well reproduced and anomalous behaviour on the radii are observed in N-23, Ne-29, Na-33, Mg-35, S-44, Cl-45 and Ar-45 nuclei.

Integrované účinné průřezy byly změřeny pro 60 neutrono-bohatých jader v oblasti N=20 a N=28 při energiích (30÷65) AMev. Redukované poloměry silné absorbce byly změřeny pro 19 jader.
Trvalý link: http://hdl.handle.net/11104/0118218