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Absence of delayed fission in theβ −-decay of 2.3 min238Pa (1985)

Baas-May, A. ; Kratz, J. V. ; Trautmann, N.

Springer

The European physical journal 322 (1985), S. 457-462

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ISSN: 1434-601X

Keywords: 23.40−s ; 25.85−w

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We have searched for beta-delayed fission in the decay of 2.3 min238Pa produced in the238U(n,p) reaction with 14.7 MeV neutrons. Through microprocessor-controlled chemical separations of protactinium about 109 atoms of238Pa were isolated and exposed to fission track detectors. From the absence of fission tracks an upper limit for the betadelayed fission probability of238Pa, i.e.P βf 〈2.6 10−8, is obtained at 95% confidence level. This rules out positive evidence for this decay mode of238Pa reported elsewhere. Simple theoretical estimates ofP βf range from 10−7 to 10−9.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01412080

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