In:
Chinese Physics C, IOP Publishing, Vol. 43, No. 12 ( 2019-12-01), p. 124002-
Abstract:
Differential and angle-integrated cross sections for the 10 B( n , α ) 7 Li, 10 B( n , α 0 ) 7 Li and 10 B( n , α 1 ) 7 Li * reactions have been measured at CSNS Back- n white neutron source. Two enriched (90%) 10 B samples 5.0 cm in diameter and ~85.0 μg/cm 2 in thickness each with an aluminum backing were prepared, and back-to-back mounted at the sample holder. The charged particles were detected using the silicon-detector array of the Light-charged Particle Detector Array (LPDA) system. The neutron energy E n was determined by TOF (time-of-flight) method, and the valid α events were extracted from the E n -Amplitude two-dimensional spectrum. With 15 silicon detectors, the differential cross sections of α -particles were measured from 19.2° to 160.8°. Fitted with the Legendre polynomial series, the ( n , α ) cross sections were obtained through integration. The absolute cross sections were normalized using the standard cross sections of the 10 B( n , α ) 7 Li reaction in the 0.3 – 0.5 MeV neutron energy region. The measurement neutron energy range for the 10 B( n , α ) 7 Li reaction is 1.0 eV≤ E n 〈 2.5 MeV (67 energy points), and that for the 10 B( n , α 0 ) 7 Li and 10 B( n , α 1 ) 7 Li * reactions is 1.0 eV ≤ E n 〈 1.0 MeV (59 energy points). The present results have been analyzed by the resonance reaction mechanism and the level structure of the 11 B compound system, and compared with existing measurements and evaluations.
Type of Medium:
Online Resource
ISSN:
1674-1137
,
2058-6132
DOI:
10.1088/1674-1137/43/12/124002
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2019
detail.hit.zdb_id:
2491278-5
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