TY  - JOUR
AU  - n_TOF Collaboration (Guerrero, C. et al
AU  - Domingo-Pardo, C.
AU  - Tain, J. L.
PY  - 2012
DA  - 2012//
TI  - Measurement and resonance analysis of the Np-237 neutron capture cross section
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 044616
EP  - 15pp
VL  - 85
IS  - 4
PB  - Amer Physical Soc
AB  - The neutron capture cross section of Np-237 was measured between 0.7 and 500 eV at the CERN n_TOF facility using the 4 pi BaF2 Total Absorption Calorimeter. The experimental capture yield was extracted minimizing all the systematic uncertainties and was analyzed together with the most reliable transmission data available using the SAMMY code. The result is a complete set of individual as well as average resonance parameters [D-0 = 0.56(2) eV, <Gamma(gamma)> = 40.9(18) meV, 10(4)S(0) = 0.98(6), R' = 9.8(6) fm]. The capture cross section obtained in this work is in overall agreement with the evaluations and the data of Weston and Todd [Nucl. Sci. Eng. 79, 184 (1981)], thus showing sizable differences with respect to previous data from Scherbakov et al. [J. Nucl. Sci. Technol. 42, 135 (2005)] and large discrepancies with data Kobayashi et al. [J. Nucl. Sci. Technol. 39, 111 (2002)]. The results indicate that a new evaluation combining the present capture data with reliable transmission data would allow reaching an accuracy better than 4%, in line with the uncertainty requirements of the nuclear data community for the design and operation of current and future nuclear devices.
SN  - 0556-2813
UR  - https://doi.org/10.1103/PhysRevC.85.044616
DO  - 10.1103/PhysRevC.85.044616
LA  - English
N1  - WOS:000303069400004
ID  - n_TOFCollaborationGuerrero_etal2012
ER  -