First experiments on transmutation studies of129I and237Np using relativistic protons of 3.7 GeV期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

First experiments on transmutation studies of129I and237Np using relativistic protons of 3.7 GeV

Authors:	M. I. Krivopustov J. Adam V. Bradnova R. Brandt V. S. Butsev P. I. Golubev V. G. Kalinnikov J. Karachuk B. A. Kulakov E.-J. Langrock G. Modolo M. Ochs R. Odoj A. N. Premyshev V. S. Pronskich Th. Schmidt V. I. Stegailov J. S. Wan V. M. Zupko-Sitnikov

Affiliation:	(1) Joint Institute for Nuclear Research, JINR, Dubna, Russia;(2) Kernchemie, Philipps-Universität, Marburg, Germany;(3) Forschungszenstrum Jülich, FZJ, Jülich, Germany;(4) Northwest Institute of Nuclear Technology, Xian, P. R. China

Abstract:	First experiments on the transmutation of long-lived¹²⁹I and²³⁷Np using relativistic protons of 3.7 GeV are described. Relativistic protons generate in extended Pb-targets substancial neutron fluences. These neutrons get moderated in paraffin and are used for transmutation as follows:¹²⁹I(n,)¹³⁰I and²³⁷Np(n,)²³⁸Np. The isotopes¹³⁰I (T_1/2-12.36 h) and²³⁸Np (T_1/2=2.117 d) were identified radiochemically. One can estimate the transmutation cross-section (n,) in the given neutron field as (¹²⁹I(n,))=(10±2)b and (²³⁷Np(n,))=(140±30)b The experiments were carried out in November 1996 at the Synchrophasotron, LHE, Dubna, Russia. The investigation has been performed at the Laboratory of High Energies, JINR, Dubna.

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