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Rogers AM, Famiano MA, Lynch WG, et al. Ground-state proton decay of 69Br and implications for the 68Se astrophysical rapid proton-capture process waiting point. Phys Rev Lett. 2011;106(25):252503doi: 10.1103/PhysRevLett.106.252503.
Rogers, A. M., Famiano, M. A., Lynch, W. G., Wallace, M. S., Amorini, F., Bazin, D., Charity, R. J., Delaunay, F., de Souza, R. T., Elson, J., Gade, A., Galaviz, D., van Goethem, M. J., Hudan, S., Lee, J., Lobastov, S., Lukyanov, S., Matoš, M., Mocko, M., Schatz, H., Shapira, D., Sobotka, L. G., Tsang, M. B., & Verde, G. (2011). Ground-state proton decay of 69Br and implications for the 68Se astrophysical rapid proton-capture process waiting point. Physical review letters, 106(25), 252503. https://doi.org/10.1103/PhysRevLett.106.252503
Rogers, A M, et al. "Ground-state proton decay of 69Br and implications for the 68Se astrophysical rapid proton-capture process waiting point." Physical review letters vol. 106,25 (2011): 252503. doi: https://doi.org/10.1103/PhysRevLett.106.252503
Rogers AM, Famiano MA, Lynch WG, Wallace MS, Amorini F, Bazin D, Charity RJ, Delaunay F, de Souza RT, Elson J, Gade A, Galaviz D, van Goethem MJ, Hudan S, Lee J, Lobastov S, Lukyanov S, Matoš M, Mocko M, Schatz H, Shapira D, Sobotka LG, Tsang MB, Verde G. Ground-state proton decay of 69Br and implications for the 68Se astrophysical rapid proton-capture process waiting point. Phys Rev Lett. 2011 Jun 24;106(25):252503. doi: 10.1103/PhysRevLett.106.252503. Epub 2011 Jun 24. PMID: 21770637.
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Phys Rev Lett. 2011 Jun 24;106(25):252503. doi: 10.1103/PhysRevLett.106.252503. Epub 2011 Jun 24.

Ground-state proton decay of 69Br and implications for the 68Se astrophysical rapid proton-capture process waiting point.

Physical review letters

A M Rogers, M A Famiano, W G Lynch, M S Wallace, F Amorini, D Bazin, R J Charity, F Delaunay, R T de Souza, J Elson, A Gade, D Galaviz, M-J van Goethem, S Hudan, J Lee, S Lobastov, S Lukyanov, M Matoš, M Mocko, H Schatz, D Shapira, L G Sobotka, M B Tsang, G Verde

Affiliations

  1. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA. [email protected]

PMID: 21770637 DOI: 10.1103/PhysRevLett.106.252503

Abstract

We report on the first direct measurement of the proton separation energy for the proton-unbound nucleus (69)Br. Bypassing the (68)Se waiting point in the rp process is directly related to the 2p-capture rate through (69)Br, which depends exponentially on the proton separation energy. We find a proton separation energy for (69)Br of Sp((69)Br )= -785(-40)(+34) keV; this is less bound compared to previous predictions which have relied on uncertain theoretical calculations. The influence of the extracted proton separation energy on the rp process occurring in type I x-ray bursts is examined within the context of a one-zone burst model.

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