Hsiao-Chueh Kao

Publication Date


Advisor(s) - Committee Chair

D.L. Humphrey, George Moore, U.F. Six

Degree Program

Department of Physics and Astronomy

Degree Type

Master of Science


The purpose of this investigation was to measure the cross section for each of the reactions 87Rb(n, 2n) 86mRb, 112Cd(n, 2n)111mCd, 138Ba(n, 2n) 137mBa and 186W(n, 2n) 185mW at 14.7 ± 0.03 MeV incident neutron energy. The incident neutron flux was determined during each irradiation from the activity produced in copper or aluminum disks between which the isotopically enriched sample was sandwiched. The 63Cu(n, 2n)62Cu and 27Al(n, p)27Mg reaction cross sections were assumed to be 593 ± 45 mb and 73 ± 5 mb respectively.

The activity of the sample and monitors was determined by using a 7.6 cm x 7.6 cm NaI(Tl) scintillation spectrometer calibrated with NBS standard sources or by employing the coincidence method in the case of the copper monitors.

The measured cross sections in this experiment were 87Rb(n, 2n)86mRb (450 ±51 mb), 112CD(n, 2n)111mCd (400 ± 45 mb), 138Ba(n, 2n) 137mBa (769 ± 87 mb), and 186W(n, 2n)185mW (602 ± 74 mb).


Astrophysics and Astronomy | Physics