New Fe-59 Stellar Decay Rate with Implications for the Fe-60 Radioactivity in Massive Stars

doi:10.1103/PhysRevLett.126.152701

	New Fe-59 Stellar Decay Rate with Implications for the Fe-60 Radioactivity in Massive Stars
	Gao, B.9,10; Giraud, S.1; Li, K. A.9,10; Sieverding, A.8; Zegers, R. G. T.1,6,7; Tang, X.9,10; Ash, J.1,6; Ayyad-Limonge, Y.1; Bazin, D.1,6; Biswas, S.1
刊名	PHYSICAL REVIEW LETTERS
	2021-04-12
卷号	126 期号:15 页码:6
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.126.152701
通讯作者	Gao, B.(gaobsh@impcas.ac.cn) ; Li, K. A.(lika@impcas.ac.cn)
英文摘要	The discrepancy between observations from gamma-ray astronomy of the Fe-60/Al-26 gamma-ray flux ratio and recent calculations is an unresolved puzzle in nuclear astrophysics. The stellar beta-decay rate of Fe-59 is one of the major nuclear uncertainties impeding us from a precise prediction. The important Gamow-Teller strengths from the low-lying states in Fe-59 to the Co-59 ground state are measured for the first time using the exclusive measurement of the Co-59(t, He-3 + gamma) Fe-59 charge-exchange reaction. The new stellar decay rate of Fe-59 is a factor of 3.5 +/- 1.1 larger than the currently adopted rate at T = 1.2 GK. Stellar evolution calculations show that the Fe-60 production yield of an 18 solar mass star is decreased significantly by 40% when using the new rate. Our result eliminates one of the major nuclear uncertainties in the predicted yield of Fe-60 and alleviates the existing discrepancy of the Fe-60/Al-26 ratio.
资助项目	National Key Research and Development program[MOST 2016YFA0400501] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB XDB34020000] ; U.S. Department of Energy, in the Office of Nuclear Physics of the Office of Science ; DOE[DE-SC0019034] ; DOE[DE-AC02-05CH11231] ; U.S.-NSF[PHY-1811855] ; U.S. Department of Energy, Office of Science, Office of Nuclear Physics[DE-SC0020451] ; U.S. Department of Energy[DE-FG02-87ER40328]
WOS关键词	SOLAR METALLICITY STARS ; PRE-SUPERNOVA EVOLUTION ; PF-SHELL NUCLEI ; M-CIRCLE-DOT ; NUCLEOSYNTHESIS ; AL-26 ; EXPLOSION ; ISOTOPES
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000652828100007
资助机构	National Key Research and Development program ; Strategic Priority Research Program of Chinese Academy of Sciences ; U.S. Department of Energy, in the Office of Nuclear Physics of the Office of Science ; DOE ; U.S.-NSF ; U.S. Department of Energy, Office of Science, Office of Nuclear Physics ; U.S. Department of Energy
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137175]
专题	中国科学院近代物理研究所
通讯作者	Gao, B.; Li, K. A.
作者单位	1.Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA 2.Int Res Ctr Nuclei & Particles Cosmos, Beijing 100191, Peoples R China 3.Beihang Univ, Sch Phys, Beijing 100191, Peoples R China 4.Royal Inst Technol, Dept Phys, S-10691 Stockholm, Sweden 5.Monash Univ, Sch Phys & Astron, Melbourne, Vic 3800, Australia 6.Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA 7.Michigan State Univ, Joint Inst Nucl Astrophys, Ctr Evolut Elements, E Lansing, MI 48824 USA 8.Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA 9.Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 73000, Peoples R China 10.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Gao, B.,Giraud, S.,Li, K. A.,et al. New Fe-59 Stellar Decay Rate with Implications for the Fe-60 Radioactivity in Massive Stars[J]. PHYSICAL REVIEW LETTERS,2021,126(15):6.
APA	Gao, B..,Giraud, S..,Li, K. A..,Sieverding, A..,Zegers, R. G. T..,...&Weisshaar, D..(2021).New Fe-59 Stellar Decay Rate with Implications for the Fe-60 Radioactivity in Massive Stars.PHYSICAL REVIEW LETTERS,126(15),6.
MLA	Gao, B.,et al."New Fe-59 Stellar Decay Rate with Implications for the Fe-60 Radioactivity in Massive Stars".PHYSICAL REVIEW LETTERS 126.15(2021):6.