G. Perdikakis

Production and beta decay of rp-process nuclei 96Cd, 98In, and 100Sn.

The beta-decay properties of the N=Z nuclei 96Cd, 98In, and 100Sn have been studied. These nuclei were produced at the National Superconducting Cyclotron Laboratory by fragmenting a 120 MeV/nucleon 112Sn primary beam on a Be target. The resulting radioactive beam was filtered in the A1900 and the newly commissioned Radio Frequency Fragment Separator to achieve a purity level suitable for decay studies. The observed production cross sections of these nuclei are lower than predicted by factors of 10-30. The half-life of 96Cd, which was the last experimentally unknown waiting point half-life of the astrophysical rp process, is 1.03_{-0.21};{+0.24} s. The implications of the experimental T_{1/2} value of 96Cd on the abundances predicted by rp process calculations and the origin of A=96 isobars such as 96Ru are explored.

Novel technique for constraining r -process (n, γ) reaction rates

A novel technique has been developed, which will open exciting new opportunities for studying the very neutron-rich nuclei involved in the r process. As a proof of principle, the γ spectra from the β decay of ^{76}Ga have been measured with the SuN detector at the National Superconducting Cyclotron Laboratory. The nuclear level density and γ-ray strength function are extracted and used as input to Hauser-Feshbach calculations. The present technique is shown to strongly constrain the ^{75}Ge(n,γ)^{76}Ge cross section and reaction rate.

The Nd-150(He-3,t) and Sm-150(t,He-3) reactions with applications to beta beta decay of Nd-150

The

LENDA: A low energy neutron detector array for experiments with radioactive beams in inverse kinematics

^{150}

Experimental Neutron Capture Rate Constraint Far from Stability

Nd(

β-delayed proton emission in the 100Sn region

^3

beta-decay half-life of the rp-process waiting-point nuclide 84Mo

He,

Toward a complete theory for predicting inclusive deuteron breakup away from stability

t

Gamow-Teller unit cross sections for (t,He3) and (He3,t) reactions

) reaction at 140 MeV/u and

LENDA: A Low Energy Neutron Detector Array for Studies of

^{150}