β-decay half-lives andβ-delayed neutron multiplicities of the neutron drip-line nuclei19B,22C,and23N
| Autor: | T. Kishida, Hiroshi Ogawa, Naoki Fukuda, N. Aoi, M. Schäfer, Kenichiro Yoneda, Masahiro Notani, W. D. Schmidt-Ott, Terutaro Nakamura, S. S. Yamamoto, M. Ishihara, Hironori Iwasaki, Eiji Ideguchi, Hiroyoshi Sakurai |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Physical Review C. 67 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.67.014316 |
| Popis: | Beta-decay properties of the neutron drip-line nuclei ${}^{19}\mathrm{B},{}^{22}\mathrm{C},$ and ${}^{23}\mathrm{N}$ have been studied using projectile fragments from 95 MeV/nucleon ${}^{40}\mathrm{Ar}$ ions incident on a ${}^{\mathrm{nat}}\mathrm{Ta}$ target. The $\ensuremath{\beta}$-decay half-lives of ${}^{22}\mathrm{C}$ and ${}^{23}\mathrm{N}$ have been determined for the first time to be ${6.1}_{\ensuremath{-}1.2}^{+1.4}$ and ${14.1}_{\ensuremath{-}1.5}^{+1.2}$ ms, respectively. The half-life of ${}^{19}\mathrm{B}$ was reinvestigated, resulting in a new value of $2.92\ifmmode\pm\else\textpm\fi{}0.13$ ms. The $\ensuremath{\beta}$-delayed neutron multiplicities have also been determined to be ${P}_{1n}{=71.8}_{\ensuremath{-}9.1}^{+8.3}%,{P}_{2n}{=16.0}_{\ensuremath{-}4.8}^{+5.6}%$ for ${}^{19}\mathrm{B},{P}_{1n}{=61}_{\ensuremath{-}13}^{+14}%$ for ${}^{22}\mathrm{C},$ and ${P}_{1n}{=42.2}_{\ensuremath{-}6.5}^{+6.3}%,{P}_{2n}{=8.0}_{\ensuremath{-}3.4}^{+3.8}%$ for ${}^{23}\mathrm{N}.$ The results are compared with theoretical predictions. |
| Databáze: | OpenAIRE |
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