Differential cross sections and T20 and 20TT analyzing powers have been measured for 70 MeV Li7 breakup into the particle plus triton channel, on a Sn120 target. Measurements were made for both continuum breakup and sequential breakup via the 4.63 MeV state in Li7. The T20 data for the continuum breakup do not agree with a semiclassical Coulomb...
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May 8, 2017 (v1)PublicationUploaded on: March 27, 2023
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2015 (v1)Publication
The 22Ne(p; γ23Na reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle affects the synthesis of the elements between 20Ne and 27Al in asymptotic giant branch stars and novae. The 22Ne(p; γ)23Na reaction rate is very uncertain because of a large number of unobserved resonances lying in the Gamow window. At proton energies...
Uploaded on: April 14, 2023 -
2017 (v1)Publication
Context. Material processed by the CNO cycle in stellar interiors is enriched in 17O. When mixing processes from the stellar surface reach these layers, as occurs when stars become red giants and undergo the first dredge up, the abundance of 17O increases. Such an occurrence explains the drop of the 16O/17O observed in RGB stars with mass...
Uploaded on: April 14, 2023 -
2017 (v1)Publication
Stardust grains recovered from meteorites provide highprecision snapshots of the isotopic composition of the stellar environment in which they formed1. Attributing their origin to specific types of stars, however, often proves difficult. Intermediate-mass stars of 4–8 solar masses are expected to have contributed a large fraction of meteoritic...
Uploaded on: April 14, 2023 -
February 22, 2022 (v1)Publication
Neutron destruction reactions of the cosmic γ -ray emitter 26Al are of importance to determine the amount of 26Al ejected into our galaxy by supernova explosions and for 26Al production in asymptotic giant branch stars. We performed a new measurement of the 26Al(n, α) reaction up to 160-keV neutron energy at the neutron time-of-flight...
Uploaded on: March 25, 2023