Measurements of the neutron total cross-sections of tantalum by using pulsed neutrons based on an electron linac

• Main Authors: Yoo, K.J., Lee, Y.Y., Meaze, A., Devan, K., Khandaker, Mayeen Uddin, Kim, G., Son, D., Lee, Y.S., Kang, H., Cho, A.H., Ko, I.S., Namkung, W., Kim, Y.A.
• Format: Article
• Published: 2006
• Subjects: QC Physics
• Online Access: http://eprints.um.edu.my/7987/; https://www.google.com.my/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&ved=0CDMQFjAB&url=http%3A%2F%2Fwww.kps.or.kr%2Fjkps%2FdownloadPdf.asp%3Farticleuid%3D%257BB1644BB9-66F9-4234-981E-220911782928%257D&ei=DpJjUfmDO82HrAeokoDwCQ&usg=AFQjCNH4NL8Jh_G5oI

The neutron total cross-sections of tantalum (Ta-181) were measured in the neutron energy region from 0.01 eV to 100 eV by using the time-of-flight method at the Pohang Neutron Facility, which consists of an electron linac, a water-cooled tantalum target with a water moderator, and a 12-m-long time-of-flight path. A Li-6-ZnS(Ag) scintillator with a diameter of 12.5 cm and a thickness of 1.6 cm was used as a neutron detector, and a natural tantalum metal plate, 10 x 10 cm 2 in area by 0.45 mm in thickness, was used for the neutron transmission measurement. The background level was determined by using a notch-filter of Co, In, and Cd sheets. The present measurement was compared with the previous ones and the evaluated data in ENDF/B-VI.8. The resonance parameters of Ta-181 isotope were obtained from the transmission ratio by using the SAMMY code, which utilizes both Doppler and resolution broadening effects and Bayes' generalized least squares technique.