MASS MEASUREMENT OF {sup 45}Cr AND ITS IMPACT ON THE Ca-Sc CYCLE IN X-RAY BURSTS

Journal Article · Wed Mar 20 04:00:00 EDT 2013 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/766/1/L8· OSTI ID:22130805

Yan, X. L.; Xu, H. S.; Litvinov, Yu. A.; Zhang, Y. H.; Tu, X. L.; Zhou, X. H.; He, J. J.; Sun, Y.; Wang, M.; Yuan, Y. J.; Xia, J. W.; Yang, J. C.; Jia, G. B.; Hu, Z. G.; Ma, X. W.; Mao, R. S. ^[1]; Schatz, H. ^[2]; Blaum, K. ^[3]; Sun, B. H. ^[4]; Audi, G. ^[5] ; others, and

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1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China)
2. National Superconducting Cyclotron Laboratory, Department of Physics and Astronomy and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824 (United States)
3. Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany)
4. School of Physics and Nuclear Energy Engineering, Beihang University, 100191 Beijing (China)
5. CSNSM-IN2P3-CNRS, Universite de Paris Sud, F-91405 Orsay (France)

Masses of neutron-deficient {sup 58}Ni projectile fragments have been measured at the HIRFL-CSR facility in Lanzhou, China employing the isochronous mass spectrometry technique. Masses of a series of short-lived T{sub z} = -3/2 nuclides including the {sup 45}Cr nucleus have been measured with a relative uncertainty of about 10{sup -6}-10{sup -7}. The new {sup 45}Cr mass turned out to be essential for modeling the astrophysical rp-process. In particular, we find that the formation of the predicted Ca-Sc cycle in X-ray bursts can be excluded.

• OSTI ID: 22130805
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 766; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
ASTROPHYSICS
CALCIUM
CHROMIUM 45
HIRFL CYCLOTRON
MASS
MASS SPECTROSCOPY
NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
NICKEL 58
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
SCANDIUM
SIMULATION
X RADIATION