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Fission lifetimes of Th nuclei measured by crystal blocking (2003)

Karamian, S.A. ; Forster, J.S. ; Andersen, J.U. ; [et al.]

Springer

The European physical journal 17 (2003), S. 49-56

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ISSN: 1434-601X

Keywords: PACS. 24.75.+i General properties of fission – 61.85.+p Channeling phenomena (blocking, energy loss, etc.)

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: Crystal blocking lifetime measurements have been made for highly excited Th nuclei with neutron number well removed from the stability line. Thin W crystals were bombarded with 32S ions in the energy range 170-180 MeV and the yield of fission fragments was measured for emission close to a 〈111〉 axis. The fission blocking dips are compared to the appropriately scaled ones for elastic scattering of the 32S beam ions and no significant difference is seen between the dips. This implies that the fraction of nuclei fissioning with lifetimes longer than 10 as is less than 2%. Fission lifetimes are increased by viscosity in the nuclear mass flow and comparison with a statistical model calculation indicates that the viscosity parameter, η, must be lower than for Th and U nuclei near β-stability. The effect of the N = 126 magic number is discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1140/epja/i2002-10139-0

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Lifetimes of excited states in Cu^6^3, Cu^6^5, Ni^6^2 and Fe^5^6 by Doppler shift attenuation measurements

Eswaran, M.A. ; Gove, H.E. ; Litherland, A.E. ; [et al.]

Amsterdam : Elsevier

Nuclear Physics 66 (1965), S. 401-418

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ISSN: 0029-5582

Keywords: Deduced T12 ; Fe^5^6 natural target, Ni^6^2, Cu^6^3^,^6^5 enriched targets ; NUCLEAR REACTIONS Fe^5^6(O^1^6,O^1^6'γ), E=34 MeV ; Ni^6^2, Cu^6^3^,^6^5(O^1^6,O^1^6'γ), E=36 MeV ; measured γO^1^6'-coin, Doppler shift

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002