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Author(s) |
Naik, H.; Kim, G.; Kim, K.; Zaman, M.; Yang, S. C.; Sahid, M.; Lee, M.; Shin, S. G.; Goswami, A.; Cho, M. H. (RCD)
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Source |
Journal of Radioanalytical & Nuclear Chemistry, 2014. Vol. 300 (3): pp. 1121-1130 |
ABSTRACT
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The independent isomeric yield ratios of 95m, gNb from the natMo(γ, pxn)
reactions with bremsstrahlung endpoint energies of 45, 50, 55, 60, and
70 MeV were determined by an activation and an off-line γ-ray
spectrometric technique at the Pohang accelerator laboratory (PAL),
Korea. The isomeric yield ratios of 95m,gNb from the natZr(p,
xn) reactions were also determined in eight different proton energies
within 19.4–44.7 MeV by a stacked-foil activation and an off-line c-ray
spectrometric technique using the MC- 50 cyclotron of Korea Institute of
Radiological and Medical Sciences (KIRAMS), Korea. The measured
isomeric yield ratios of 95m,gNb from the present work and the literature data in the natMo(γ, pxn) and natZr(p, xn) reactions were compared with the similar literature data in the natMo(p, axn)
reactions. It was found that the isomeric yield ratio of 95m,gNb
increases with projectile energy, which indicate the effect of
excitation energy. However, at the same excitation energy, the isomeric
yield ratios of 95m,gNb in the natZr(p, xn) and natMo(p, axn) reactions are higher than those in the natMo(c, pxn) reaction, which indicates the role of input angular momentum. The isomeric yield ratios of 95m,gNb in the natMo(γ, pxn), natZr(p, xn), and natMo(p, αxn) reactions were also calculated using computer code TALYS 1.4. The calculated isomeric yield ratios of 95m,gNb
from three reactions increase with excitation energy. However, in all
the three reactions, the calculated values are significantly higher than
the experimental data. |
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