Determination of the $sup 237$Np(n,2n)$sup 236$Np cross section at 15 MeV neutron energy
The neutron cross section for the $sup 237$Np(n, 2n)$sup 236$Np/sup g/ reaction has been determined at a neutron energy of 15 MeV. Two independent methods were used: (1) $alpha$ particles of $sup 236$Pu following the $beta$' decay of $sup 236$Np were counted after chemical separation of Pu. (2) The 642.4 keV $gamma$ rays of $sup 236$Np/sup g/ decay to $sup 236$U were measured directly after the irradiation of the $sup 237$Np sample. The neutron fluence was calculated from the $sup 27$A1(n,$alpha$$)$$sup 24$Na reaction and from the measurement of the fission product $sup 97$Zr with a calibrated Ge(Li) spectrometer. The most precise value is 247 +- 22 mb. The error is mainly due to uncertainties of the nuclear data used for the cross-section calculation. (AIP)
- Research Organization:
- Institut fuer Radiochemie der Technische Universitaet Munchen, D- 8046 Garching, Germany
- NSA Number:
- NSA-33-010946
- OSTI ID:
- 4137341
- Journal Information:
- Phys. Rev., C, v. 12, no. 5, pp. 1507-1510, Journal Name: Phys. Rev., C, v. 12, no. 5, pp. 1507-1510; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*NEPTUNIUM 237-- NEUTRON REACTIONS
643405*
CROSS SECTIONS
FAST NEUTRONS
MEV RANGE 10-100
N69151* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
A >= 220--Nuclear Reactions & Scattering
NEPTUNIUM 236
NESDPS Office of Nuclear Energy Space and Defense Power Systems
NEUTRONS