Proton decay from the isoscalar giant dipole resonance in $^{58}$Ni
| Autor: | Hunyadi, M., Hashimoto, H., Li, T., Akimune, H., Fujimura, H., Fujiwara, M., Gacsi, Z., Garg, U., Hara, K., Harakeh, M. N., Hoffman, J., Itoh, M., Murakami, T., Nakanishi, K., Nayak, B. K., Okumura, S., Sakaguchi, H., Terashima, S., Uchida, M., Yasuda, Y., Yosoi, M. |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Phys.Rev.C80:044317,2009 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.80.044317 |
| Popis: | Proton decay from the 3$\hbar\omega$ isoscalar giant dipole resonance (ISGDR) in $^{58}$Ni has been measured using the ($\alpha,\alpha'p$) reaction at a bombarding energy of 386 MeV to investigate its decay properties. We have extracted the ISGDR strength under the coincidence condition between inelastically scattered $\alpha$ particles at forward angles and decay protons emitted at backward angles. Branching ratios for proton decay to low-lying states of $^{57}$Co have been determined, and the results compared to predictions of recent continuum-RPA calculations. The final-state spectra of protons decaying to the low-lying states in $^{57}$Co were analyzed for a more detailed understanding of the structure of the ISGDR. It is found that there are differences in the structure of the ISGDR as a function of excitation energy. Comment: Minor changes after review. Accepted for publication in Phys. Rev. C. 19 pages; 7 figures |
| Databáze: | arXiv |
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