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arxiv 1909.11377 v1 pith:F43E6IAH submitted 2019-09-25 nucl-ex

Simultaneous measurement of beta-delayed proton and gamma emission of ²⁶P for ²⁵Al(p,γ)²⁶Si reaction rate

P. F. Liang , L. J. Sun , J. Lee , S. Q. Hou , X. X. Xu , C. J. Lin , C. X. Yuan , J. J. He
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Z. H. Li J. S. Wang D. X. Wang H. Y. Wu Y. Y. Yang Y. H. Lam P. Ma F. F. Duan Z. H. Gao Q. Hu Z. Bai J. B. Ma J. G. Wang F. P. Zhong C. G. Wu D. W. Luo Y. Jiang Y. Liu D. S. Hou R. Li N. R. Ma W. H. Ma G. Z. Shi G. M. Yu D. Patel S. Y. Jin Y. F. Wang Y. C. Yu Q. W. Zhou P. Wang L. Y. Hu X. Wang H. L. Zang P. J. Li Q. Q. Zhao L. Yang P. W. Wen F. Yang H. M. Jia G. L. Zhang M. Pan X. Y. Wang H. H. Sun Z. G. Hu R. F. Chen M. L. Liu W. Q. Yang Y. M. Zhao
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$\beta$ decay of $^{26}$P was used to populate the astrophysically important $E_x=$5929.4(8) keV $J^{\pi}=3{^+}$ state of $^{26}$Si. Both $\beta$-delayed proton at 418(8) keV and gamma ray at 1742(2) keV emitted from this state were measured simultaneously for the first time with corresponding absolute intensities of 11.1(12)\% and 0.59(44)\%, respectively. Besides, shell model calculations with weakly bound effects were performed to investigate the decay properties of other resonant states and a spin-parity of $4^+$ rather than $0^+$ was favored for the $E_x=$5945.9(40) keV state. Combining the experimental results and theoretical calculations, $^{25}$Al($p,\gamma$)$^{26}$Si reaction rate in explosive hydrogen burning environments was calculated and compared with previous studies.

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