التفاصيل البيبلوغرافية
| العنوان: |
Photo-nuclear cross sections on $^{197}$Au, an update on the gold standard |
| المؤلفون: |
Song, J., Rotsch, D., Nolen, J. A., Gampa, R., de Kruijff, R. M., Brossard, T., Howell, C. R., Krishichayan, F., Wu, Y. K., Mikhailov, S., Ahmed, M. W., Janssens, R. V. F. |
| سنة النشر: |
2024 |
| المجموعة: |
Nuclear Experiment |
| مصطلحات موضوعية: |
Nuclear Experiment |
| الوصف: |
A method was developed for measuring photonuclear reactions concurrently at several discrete photon beam energies on a stack of different target materials via a single irradiation. Concentric ring targets of the materials (in order from front to back targets: Au, TiO$_2$, Zn, Os, and Au) were irradiated at the High Intensity Gamma-ray Source (HI$\gamma$S). As a proof of principle, we report the result of the cross section measurements from the front Au target. The excitation functions of the $^{197}$Au($\gamma$,n)$^{196}$Au and $^{197}$Au($\gamma$,3n)$^{194}$Au reactions were determined in the incident photon energy range of 13-31 MeV using quasi-monoenergetic photon beams provided at HI$\gamma$S. The cross sections of the combined ground state (2$^{-}$) and short-lived first isomeric state (m1, 5$^{+}$), and of the second isomeric state (m2, 12$^{-}$) in the $^{196}$Au production are obtained separately by subtracting the $\gamma$ rays from the internal conversion of the second isomeric state. The excitation function of the second isomeric state via the photon-induced reaction $^{197}$Au($\gamma$,n)$^{196m2}$Au was measured for the first time. By using the activation method rather than direct neutron counting, the exclusive cross sections for the ($\gamma$,n) and ($\gamma$,3n) reactions were determined. Comparing the yields from the front and back gold targets validates our ability to simulate the effect of photon scattering in the target stack and provides a method for assessing the systematic uncertainty of our technique. |
| نوع الوثيقة: |
Working Paper |
| URL الوصول: |
http://arxiv.org/abs/2402.15421 |
| رقم الانضمام: |
edsarx.2402.15421 |
| قاعدة البيانات: |
arXiv |