Differential cross section for neutron scattering from {sup 209}Bi at 37 MeV and the weak particle-core coupling

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.024601· OSTI ID:21419436

Zuying, Zhou; Xichao, Ruan; Yanfeng, Du; Bujia, Qi; Hongqing, Tang; Haihong, Xia; Walter, R L; Braun, R T; Howell, C R; Tornow, W; Weisel, G J; Dupuis, M; Delaroche, J P; Zemin, Chen; Zhenpeng, Chen; Yingtang, Chen ^[1]

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1. China Institute of Atomic Energy, P.O. Box 275-46, Beijing 102413 (China)

Differential scattering cross-section data have been measured at 43 angles from 11 deg. to 160 deg. for 37-MeV neutrons incident on {sup 209}Bi. The primary motivation for the measurements is to address the scarcity of neutron scattering data above 30 MeV and to improve the accuracy of optical-model predictions at medium neutron energies. The high-statistics measurements were conducted at the China Institute of Atomic Energy using the {sup 3}H(d,n){sup 4}He reaction as the neutron source, a pulsed deuteron beam, and time-of-flight (TOF) techniques. Within the resolution of the TOF spectrometer, the measurements included inelastic scattering components. The sum of elastic and inelastic scattering cross sections was computed in joint optical-model and distorted-wave Born approximation calculations under the assumption of the weak particle-core coupling. The results challenge predictions from well-established spherical optical potentials. Good agreement between data and calculations is achieved at 37 MeV provided that the balance between surface and volume absorption in a recent successful model [A. J. Koning and J. P. Delaroche, Nucl. Phys. A 713, 231 (2003)] is modified, thus suggesting the need for global optical-model improvements at medium neutron energies.

• OSTI ID: 21419436
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevC.82.024601; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BISMUTH 209
CIAE
COUPLING
DEUTERON BEAMS
DEUTERON REACTIONS
DIFFERENTIAL CROSS SECTIONS
DWBA
FORECASTING
HELIUM 4
INELASTIC SCATTERING
MEV RANGE 10-100
NEUTRON DIFFRACTION
NEUTRON EMISSION
NEUTRON SOURCES
OPTICAL MODELS
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TIME-OF-FLIGHT METHOD
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BETA DECAY RADIOISOTOPES
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BORN APPROXIMATION
CALCULATION METHODS
CHARGED-PARTICLE REACTIONS
CHINESE ORGANIZATIONS
COHERENT SCATTERING
CROSS SECTIONS
DIFFRACTION
EMISSION
ENERGY RANGE
EVEN-EVEN NUCLEI
HEAVY NUCLEI
HELIUM ISOTOPES
HYDROGEN ISOTOPES
ION BEAMS
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LIGHT NUCLEI
MATHEMATICAL MODELS
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NATIONAL ORGANIZATIONS
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NUCLEI
ODD-EVEN NUCLEI
PARTICLE SOURCES
RADIATION SOURCES
RADIOISOTOPES
SCATTERING
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES