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Spallation and fission products in the (p+Hf-179) and (p+Hf-nat) reactions
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SYSNO ASEP 0339343 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Spallation and fission products in the (p+Hf-179) and (p+Hf-nat) reactions Author(s) Karamian, S. A. (RU)
Ur, C. A. (RO)
Adam, Jindřich (UJF-V) RID
Kalinnikov, V. G. (RU)
Lebedev, N. A. (RU)
Vostokin, G. K. (RU)
Collins, C. B. (US)
Popescu, I. I. (RO)Number of authors 8 Source Title Nuclear Instruments & Methods in Physics Research Section A. - : Elsevier - ISSN 0168-9002
Roč. 600, č. 2 (2009), s. 488-497Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords spallation ; fission ; Hf isomers ; Lu isomers Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders R&D Projects LA08002 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10480505 - UJF-V (2005-2011) UT WOS 000264367300018 Annotation Production of Hf and Lu high-spin isomers has been experimentally studied in spallation reactions induced by intermediate energy protons. Targets of enriched Hf-179 (91%) and Hf-nat were bombarded with protons of energy in the range from 90 to 650 MeV provided by the internal beam of the Dubna Phasotron synchrocyclotron. The activation yields of the reaction products were measured by using the gamma-ray spectroscopy and radiochemistry methods. The production cross-sections obtained for the Hf-179m2, Hf-178m2 and Lu-177m isomers are similar to the previously measured values from the spallation of Ta, Re and W targets. Therefore, the reactions involving emission of only a few nucleons, like (p,p'), (p,p'n) and (p,2pn), can transfer high enough angular momentum to the final residual nuclei with reasonable large cross-sections. A significant gain in the isomeric yields was obtained when enriched 179Hf targets were used. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2010
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