Indirect rp-process Rate Measurements from Single Neutron Removal
ORAL
Abstract
The structure of nuclei along the rp-process path in Type I X-ray bursts has been studied using neutron removal from radioactive beams produced at the National Superconducting Cyclotron Laboratory. Recently, $^{37}$Ca and $^{36}$K have been studied in this way to reduce the uncertainty in $^{35}$Ar(p,$\gamma$)$^{36}$K and $^{36}$K(p,$\gamma$)$^{37}$Ca reaction rates, which are important during burst rise. Under burst conditions these rates are dominated by resonant capture contributions from individual resonances because of the low level density just above the proton threshold, precluding the use of statistical methods based on level density to determine the reaction rates. Therefore, precise structure measurements are required to reduce the orders of magnitude rate uncertainty in these key reactions and thereby constrain X-ray burst models. Preliminary results will be presented along with the implications for X-ray burst models.
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Authors
A.M. Amthor
National Superconducting Cyclotron Laboratory, East Lansing, MI
NSCL
D. Bazin
National Superconducting Cyclotron Laboratory, East Lansing, MI
A. Becerril
National Superconducting Cyclotron Laboratory, East Lansing, MI
A. Cole
National Superconducting Cyclotron Laboratory, East Lansing, MI
J. Cook
National Superconducting Cyclotron Laboratory, East Lansing, MI
A. Estrade
National Superconducting Cyclotron Laboratory, East Lansing, MI
A. Gade
National Superconducting Cyclotron Laboratory, East Lansing, MI
M. Howard
National Superconducting Cyclotron Laboratory, East Lansing, MI
G. Lorusso
National Superconducting Cyclotron Laboratory, East Lansing, MI
M. Matos
National Superconducting Cyclotron Laboratory, East Lansing, MI
J. Pereira
National Superconducting Cyclotron Laboratory, East Lansing, MI
M. Portillo
National Superconducting Cyclotron Laboratory, East Lansing, MI
H. Schatz
National Superconducting Cyclotron Laboratory, East Lansing, MI
B. Sherrill
National Superconducting Cyclotron Laboratory, East Lansing, MI
K. Smith
National Superconducting Cyclotron Laboratory, East Lansing, MI
A. Stolz
National Superconducting Cyclotron Laboratory, East Lansing, MI
D. Weisshaar
National Superconducting Cyclotron Laboratory, East Lansing, MI
R.G.T. Zegers
National Superconducting Cyclotron Laboratory, East Lansing, MI
D. Galaviz
Instituto de Estructura de la Materia, CSIC, Madrid
