Direct Mass Measurements of Short-Lived A=2Z-1 Nuclides {sup 63}Ge, {sup 65}As, {sup 67}Se, and {sup 71}Kr and Their Impact on Nucleosynthesis in the rp Process

Journal Article · Fri Mar 18 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.112501· OSTI ID:21562099

Tu, X L; Du, C M; Geng, P; Jin, S L; Liu, L X; Tang, S W; Wang, S T; Xu, X; Yan, X L; Ye, R P; Zang, Y D ^[1]; Xu, H S; Wang, M; Zhang, Y H; Zhou, X H; Yuan, Y J; Xia, J W; Hu, Z G; Huang, W X; Liu, Y ^[2]

---

1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); Graduate University of Chinese Academy of Sciences, Beijing, 100049 (China)
2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China)

Mass excesses of short-lived A=2Z-1 nuclei {sup 63}Ge, {sup 65}As, {sup 67}Se, and {sup 71}Kr have been directly measured to be -46 921(37), -46 937(85), -46 580(67), and -46 320(141) keV, respectively. The deduced proton separation energy of -90(85) keV for {sup 65}As shows that this nucleus is only slightly proton unbound. X-ray burst model calculations with the new mass excess of {sup 65}As suggest that the majority of the reaction flow passes through {sup 64}Ge via proton capture, indicating that {sup 64}Ge is not a significant rp-process waiting point.

• OSTI ID: 21562099
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 106; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARSENIC 65
ARSENIC ISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BINDING ENERGY
CAPTURE
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
GERMANIUM 63
GERMANIUM 64
GERMANIUM ISOTOPES
HADRONS
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
KEV RANGE
KRYPTON 71
KRYPTON ISOTOPES
MASS
MILLISECONDS LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
NUCLEONS
NUCLEOSYNTHESIS
ODD-EVEN NUCLEI
PROTONS
RADIATIONS
RADIOISOTOPES
SELENIUM 67
SELENIUM ISOTOPES
SYNTHESIS
X RADIATION