Ground-state proton decay of 69Br and implications for the rp -process 68Se waiting-point

Conference · Sat Jan 01 00:00:00 EST 2011

OSTI ID:1054980

Rogers, Andrew M. ^[1]; Shapira, Dan ^[2]; Lynch, William ^[3]; Famiano, Michael ^[2]; Wallace, M S. ^[3]

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1. Argonne National Laboratory (ANL)
2. ORNL
3. Michigan State University, East Lansing

The first direct measurement of the proton separation energy, S p , for the proton-unbound nucleus 69Br is reported. Of interest is the exponential dependence of the 2 p-capture rate on S p which can bypass the 68Se waiting-point in the astrophysical rp process. An analysis of the observed proton decay spectrum is given in terms of the 69Se mirror nucleus and the influence of S p is explored within the context of a single-zone X-ray burst model.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1054980
• Resource Relation: Conference: International Nuclear Physics Conference 2010 - Vancouver, , Canada - 7/4/2010 12:00:00 AM-7/9/2010 12:00:00 AM
• Country of Publication: United States
• Language: English