24 research outputs found
Neutron capture surrogate reaction on
The 75As(d,pγ) reaction in inverse kinematics as a surrogate
for neutron capture was performed at Oak Ridge National Laboratory using a deuterated
plastic target. The intensity of the 165 keV γ-ray from 76As
in coincidence with ejected protons, from exciting 76As above the neutron
separation energy populating a compound state, was measured. A tight geometry of four
segmented germanium clover γ-ray detectors together with eight
ORRUBA-type silicon-strip charged-particle detectors was used to optimize geometric
acceptance. The preliminary analysis of the 75As experiment, and the eïňČcacy
and future plans of the (d,pγ) surrogate campaign in inverse kinematics,
are discussed
Validating (d,p
The r-process is responsible for creating roughly half of the elements heavier than iron. It has recently become understood that the rates at which neutron capture reactions proceed at late times in the r-process may dramatically affect the final abundance pattern. However, direct measurements of neutron capture reaction rates on exotic nuclei are exceptionally difficult, necessitating the development of indirect approaches such as the surrogate technique. The (d,pγ) reaction at low energies was identified as a promising surrogate for the (n,γ) reaction, as both reactions share many characteristics. We report on a program to validate (d,pγ) as a surrogate for (n,γ) using 95Mo as a target. The experimental campaign includes direct measurements of the γ-ray intensities from the decay of excited states populated in the 95Mo(n,γ) and 95Mo(d,pγ) reactions
Validating (d,pγ) as a Surrogate for Neutron Capture
The r-process is responsible for creating roughly half of the elements heavier than iron. It has recently become understood that the rates at which neutron capture reactions proceed at late times in the r-process may dramatically affect the final abundance pattern. However, direct measurements of neutron capture reaction rates on exotic nuclei are exceptionally difficult, necessitating the development of indirect approaches such as the surrogate technique. The (d,pγ) reaction at low energies was identified as a promising surrogate for the (n,γ) reaction, as both reactions share many characteristics. We report on a program to validate (d,pγ) as a surrogate for (n,γ) using 95Mo as a target. The experimental campaign includes direct measurements of the γ-ray intensities from the decay of excited states populated in the 95Mo(n,γ) and 95Mo(d,pγ) reactions