Electron-capture delayed fission properties of {sup 242}Es

Journal Article · Sat Apr 01 00:00:00 EST 2000 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.61.044609· OSTI ID:20215897

Shaughnessy, D A ^[1]; Adams, J L ^[1]; Gregorich, K E ^[1]; Lane, M R ^[1]; Laue, C A ^[1]; Lee, D M ^[1]; McGrath, C A ^[1]; Patin, J B ^[1]; Strellis, D A ^[1]; Sylwester, E R ^[1]

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1. Nuclear Science Division, Lawrence Berkeley National Laboratory, MS 70-319, Berkeley, California 94720 (United States)

Electron-capture delayed fission of {sup 242}Es produced via the {sup 233}U({sup 14}N,5n){sup 242}Es reaction at 87 MeV (on target) was observed to decay with a half-life of 11{+-}3 s, consistent with the reported {alpha}-decay half-life of {sup 242}Es of 16{sub -4}{sup +6} s. The mass-yield distribution of the fission fragments is highly asymmetric. The average pre-neutron emission total kinetic energy of the fragments was measured to be 183{+-}18 MeV. Based on the ratio of the measured number of fission events to the measured number of {alpha} decays from the electron-capture daughter {sup 242}Cf (100% {alpha} branch), the probability of delayed fission was determined to be 0.006{+-}0.002. This value for the delayed fission probability fits the experimental trend of increasing delayed fission probability with increasing Q value for electron capture. (c) 2000 The American Physical Society.

• OSTI ID: 20215897
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 61, Issue 4; Other Information: PBD: Apr 2000; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
FISSION
ELECTRON CAPTURE
EINSTEINIUM ISOTOPES
NITROGEN 14 REACTIONS
URANIUM 233 TARGET
HALF-LIFE
NEUTRON EMISSION
ALPHA DECAY
EXPERIMENTAL DATA