Parity-transfer $({}^{16}{\rm O},{}^{16}{\rm F}(0^-,{\rm g.s.}))$ reaction as a selective probe of isovector $0^-$ states in nuclei
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2020
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| author | Dozono, M. Ichimura, M. Michimasa, S. Takaki, M. Kobayashi, M. Matsushita, M. Ota, S. Tokieda, H. Fukuda, N. Inabe, N. Kawase, S. Kisamori, K. Kiyokawa, Y. Kobayashi, K. Kubo, T. Kubota, Y. Lee, C. S. Miya, H. Ohkura, A. Sagawa, H. Sakaguchi, S. Sakai, H. Sasano, M. Shimoura, S. Shindo, Y. Stuhl, L. Suzuki, H. Tabata, H. Takeda, H. Wakasa, T. Yako, K. Yanagisawa, Y. Yasuda, J. Yokoyama, R. Yoshida, K. Zenihiro, J. Uesaka, T. |
| author_facet | Dozono, M. Ichimura, M. Michimasa, S. Takaki, M. Kobayashi, M. Matsushita, M. Ota, S. Tokieda, H. Fukuda, N. Inabe, N. Kawase, S. Kisamori, K. Kiyokawa, Y. Kobayashi, K. Kubo, T. Kubota, Y. Lee, C. S. Miya, H. Ohkura, A. Sagawa, H. Sakaguchi, S. Sakai, H. Sasano, M. Shimoura, S. Shindo, Y. Stuhl, L. Suzuki, H. Tabata, H. Takeda, H. Wakasa, T. Yako, K. Yanagisawa, Y. Yasuda, J. Yokoyama, R. Yoshida, K. Zenihiro, J. Uesaka, T. |
| contents | We demonstrate that the parity-transfer $({}^{16}{\rm O},{}^{16}{\rm F}(0^-,{\rm g.s.}))$ reaction provides a selective probe of isovector $0^-$ excitations in nuclei. This reaction selectively populates unnatural-parity states through a $0^+ \to 0^-$ transition in the projectile. The excitation-energy spectrum of $^{12}\mathrm{B}$ was reconstructed via the ${}^{12}{\rm C}({}^{16}{\rm O},{}^{16}{\rm F}(0^-,{\rm g.s.}))$ reaction at 247~MeV/u from the coincident detection of the ${}^{15}\mathrm{O}+p$ decay products of ${}^{16}\mathrm{F}$. The known $0^{-}$ state at $E_x = 9.3~{\rm MeV}$ was clearly observed with a strongly enhanced forward cross section, establishing the selectivity of the reaction. Structures observed at $E_x = 6.6 \pm 0.4$ and $14.8 \pm 0.3~{\rm MeV}$ exhibit forward-peaked angular distributions and are suggested to contain significant $0^-$ strength. These results demonstrate that the parity-transfer reaction provides a powerful probe of $0^-$ excitations and highlight its potential for systematic studies of spin-isospin modes, including pion-related dynamics, in nuclei. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2007_15225 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Parity-transfer $({}^{16}{\rm O},{}^{16}{\rm F}(0^-,{\rm g.s.}))$ reaction as a selective probe of isovector $0^-$ states in nuclei Dozono, M. Ichimura, M. Michimasa, S. Takaki, M. Kobayashi, M. Matsushita, M. Ota, S. Tokieda, H. Fukuda, N. Inabe, N. Kawase, S. Kisamori, K. Kiyokawa, Y. Kobayashi, K. Kubo, T. Kubota, Y. Lee, C. S. Miya, H. Ohkura, A. Sagawa, H. Sakaguchi, S. Sakai, H. Sasano, M. Shimoura, S. Shindo, Y. Stuhl, L. Suzuki, H. Tabata, H. Takeda, H. Wakasa, T. Yako, K. Yanagisawa, Y. Yasuda, J. Yokoyama, R. Yoshida, K. Zenihiro, J. Uesaka, T. Nuclear Experiment Nuclear Theory We demonstrate that the parity-transfer $({}^{16}{\rm O},{}^{16}{\rm F}(0^-,{\rm g.s.}))$ reaction provides a selective probe of isovector $0^-$ excitations in nuclei. This reaction selectively populates unnatural-parity states through a $0^+ \to 0^-$ transition in the projectile. The excitation-energy spectrum of $^{12}\mathrm{B}$ was reconstructed via the ${}^{12}{\rm C}({}^{16}{\rm O},{}^{16}{\rm F}(0^-,{\rm g.s.}))$ reaction at 247~MeV/u from the coincident detection of the ${}^{15}\mathrm{O}+p$ decay products of ${}^{16}\mathrm{F}$. The known $0^{-}$ state at $E_x = 9.3~{\rm MeV}$ was clearly observed with a strongly enhanced forward cross section, establishing the selectivity of the reaction. Structures observed at $E_x = 6.6 \pm 0.4$ and $14.8 \pm 0.3~{\rm MeV}$ exhibit forward-peaked angular distributions and are suggested to contain significant $0^-$ strength. These results demonstrate that the parity-transfer reaction provides a powerful probe of $0^-$ excitations and highlight its potential for systematic studies of spin-isospin modes, including pion-related dynamics, in nuclei. |
| title | Parity-transfer $({}^{16}{\rm O},{}^{16}{\rm F}(0^-,{\rm g.s.}))$ reaction as a selective probe of isovector $0^-$ states in nuclei |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2007.15225 |