Determining isotopic distributions of fission products with a Penning trap

H. Penttilä; P. Karvonen; T. Eronen; V. -V. Elomaa; U. Hager; J. Hakala; A. Jokinen; A. Kankainen; I. D. Moore; K. Peräjärvi; S. Rahaman; S. Rinta-Antila; V. Rubchenya; A. Saastamoinen; T. Sonoda; J. Äystö

doi:10.1140/epja/i2010-10936-8

EPJ

Determining isotopic distributions of fission products with a Penning trap

H. Penttilä¹^*, P. Karvonen¹, T. Eronen¹, V. -V. Elomaa¹, U. Hager¹^,a, J. Hakala¹, A. Jokinen¹, A. Kankainen¹, I. D. Moore¹, K. Peräjärvi¹^,b, S. Rahaman¹^,c, S. Rinta-Antila¹, V. Rubchenya¹^,2, A. Saastamoinen¹, T. Sonoda¹^,d and J. Äystö¹

¹ Department of Physics, University of Jyväskylä, Jyväskylä, P.O. Box 35 (YFL), FI-40014, Finland
² V.G. Khlopin Radium Institute, 194021, St. Petersburg, Russia

Received: 4 November 2009
Revised: 3 February 2010
Accepted: 7 February 2010
Published online: 14 March 2010

Abstract

A novel method to determine independent yields in particle-induced fission employing the ion guide technique and ion counting after a Penning trap has been developed. The method takes advantage of the fact that a Penning trap can be used as a precision mass filter, which allows an unambiguous identification of the fission fragments. The method was tested with 25MeV and 50MeV proton-induced fission of ²³⁸U . The data is internally reproducible with an accuracy of a few per cent. A satisfactory agreement was obtained with older ion guide yield measurements in 25MeV proton-induced fission. The results for Rb and Cs yields in 50MeV proton-induced fission agree with previous measurements performed at an isotope separator equipped with a chemically selective ion source.

Present address: TRIUMF, 4004 Wesbrook Mall, V6T 2A3, Vancouver, British Columbia, Canada

Present address: STUK - Radiation and Nuclear Safety Authority, P.O. Box 14, FI-00881, Helsinki, Finland

Present address: Physics Division, P-23, Mail Stop H803, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

Present address: Atomic Physics Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan

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EPJ

Determining isotopic distributions of fission products with a Penning trap

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