Measurement of isomeric yield ratios for 90Zr(γ, n)89m,gZr, natZr(γ, xn1p)86m,gY, and 89Y(γ, xn)87m,g,86m,gY reactions with 50-, 60-, and 70-MeV bremsstrahlung

✍ Scribed by Md. Shakilur Rahman; Kyung-Sook Kim; Manwoo Lee; Gui Nyun Kim; Youngdo Oh; Hee-Seock Lee; Moo-Hyun Cho; In Soo Ko; Won Namkung; Nguyen Van Do; Pham Duc Khue; Kim Tien Thanh; Tae-Ik Ro

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 776 KB
• Volume: 267
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2009.08.024

✦ Synopsis

reactions nat Zr(c, n) 89m,g Zr nat Zr(c, xn1p) 86m,g Y 89 Y(c, xn) 87m,g,86m,g Y Isomeric yield ratio Activation method 50-, 60-, and 70-MeV bremsstrahlung a b s t r a c t

We measured the isomeric yield ratios in the photonuclear reactions of nat Zr(c, n) 89m,g Zr, nat Zr(c, xn1p) 86m,g Y, and 89 Y(c, xn) 87m,g,86m,g Y by the activation method. The high-purity natural Zr and Y metallic foils in disc shape were irradiated with uncollimated bremsstrahlung beams of 50-, 60-, and 70-MeV generated from an electron linear accelerator at Pohang Accelerator Laboratory. The induced activities in the irradiated foils were measured by the high-resolution c-ray spectrometric system consisting of a high-purity germanium detector and a multichannel analyzer. The obtained isomeric yield ratios in the formation of 89m,g Zr, 87m,g Y, and 86m,g Y are compared with the corresponding values found in the literature. The measured isomeric yield ratios at the bremsstrahlung energies of 50-, 60-, and 70-MeV are the first measurement except 87 Y at 50-MeV bremsstrahlung.