Development of an odd-Z-projectile reaction for heavy element synthesis: 208Pb(64Ni, n)271Ds and 208Pb(65Cu, n)272111

Journal Article · Mon Aug 16 00:00:00 EDT 2004 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.93.212702· OSTI ID:836679

Folden, III, C M; Gregorich, K E; Dullmann, Ch E; Mahmud, H; Pang, G K; Schwantes, J M; Sudowe, R; Zielinski, P M; Nitsche, H; Hoffman, D C

Seven {sup 271}Ds decay chains were identified in the bombardment of {sup 208}Pb targets with 311.5- and 314.3-MeV {sup 64}Ni projectiles using the Berkeley Gas-filled Separator. These data, combined with previous results, provide an excitation function for this reaction. From these results, an optimum energy of 321 MeV was estimated for the production of {sup 272}111 in the reaction {sup 208}Pb({sup 65}Cu, n). One decay chain was observed, resulting in a cross section of 1.7{sub -1.4}{sup +3.9} pb. This experiment confirms the discovery of element 111 by the Darmstadt group who used the {sup 209}Bi({sup 64}Ni, n){sup 272}111 reaction.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director. Office of Science. Office of High Energy and Nuclear Physics. Division of Nuclear Physics (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 836679
• Report Number(s): LBNL-56169; R&D Project: NHEAVY; TRN: US0500776
• Journal Information: Physical Review Letters, Vol. 93, Issue 21; Other Information: Submitted to Physical Review Letters: Volume 93, No.21; Journal Publication Date: 11/19/2004; PBD: 16 Aug 2004
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
CROSS SECTIONS
DECAY
ELEMENT 111
EXCITATION FUNCTIONS
PRODUCTION
PROJECTILES
SYNTHESIS
TARGETS