alpha decay of I-109 and its implications for the proton decay of Sb-105 and the astrophysical rapid proton-capture process

作者：Mazzocchi C^*; Grzywacz R; Liddick S N; Rykaczewski K P; Schatz H; Batchelder J C; Bingham C R; Gross C J; Hamilton J H; Hwang J K; Ilyushkin S; Korgul A; Krolas W; Li K; Page R D; Simpson D; Winger J A

来源：Physical Review Letters, 2007, 98(21): 212501.

DOI：10.1103/PhysRevLett.98.212501

An alpha-decay branch of (1.4 +/- 0.4)x10(-4) has been discovered in the decay of I-109, which predominantly decays via proton emission. The measured Q(alpha) value of 3918 +/- 21 keV allows the indirect determination of the Q value for proton emission from Sb-105 of 356 +/- 22 keV, which is approximately of 130 keV more bound than previously reported. This result is relevant for the astrophysical rapid proton-capture process, which would terminate in the Sn-105(p,gamma)Sb-106(p,gamma)Te-107(alpha decay)Sn-103 cycle at the densities expected in explosive hydrogen burning scenarios, unless unusually strong pairing effects result in a Sn-103(p,gamma)Sb-104(p,gamma)Te-105(alpha decay)Sn-101) cycle.

• 出版日期2007-5-25