Speaker
Panagiotis Gastis
(Central Michigan University)
Description
Neutrino driven winds (NDW) in core-collapse supernovae (CCSN) constitute an important astrophysical environment for nucleosynthesis, especially for the formation of elements beyond iron. If the right proton-rich conditions are found in the wind, nuclei with atomic numbers up to Z~50 can be produced via the so called neutrino-p (vp-) process. The strength of vp-process depends on a few key (n,p) reactions like the 56Ni(n,p)56Co and 64Ge(n,p)64Ga for which currently no experimental data exist. With the current state-of-the-art, any direct measurement of (n,p) reactions on neutron-deficient nuclei is extremely challenging. For this purpose, a new experimental technique is under development at the ReA3 facility of the National Superconducting Cyclotron Laboratory for the study of astrophysically important (n,p) reactions via measuring their time-reverse (p,n) reactions in inverse kinematics. The main point of this technique is the separation of the heavy reaction products from the unreacted beam. This is properly achieved by operating a section of the ReA3 beam line as a recoil separator while using the LENDA neutron detector to tag the neutrons from the (p,n) reaction. At this stage, a proof-of-principle experiment has been performed using a stable 40Ar beam at 3.52 MeV/u in order to measure the 40Ar(p,n)40K reaction. In this presentation, a detailed description of the experimental method and results from the first proof-of-principle run will be shown.
*This research project is funded by the U.S. Department of Energy, Office of Science
Primary authors
Georgios Perdikakis
(Central Michigan University)
Panagiotis Gastis
(Central Michigan University)
Co-authors
Alexander Dombos
(Michigan State University)
Alfredo Estrade
(Central Michigan University)
Alicia Palmisano
(Michigan State University)
Antonio Villari
(Facility for Rare Isotope Beams)
Artemis Spyrou
(NSCL/MSU)
Ashton Falduto
(Central Michigan University)
Carla Frohlich
(North Carolina State University)
Fernando Montes
(National Superconducting Cyclotron Laboratory)
Jaclyn Schmitt
(Michigan State University)
Jaspreet Randhawa
(National Superconducting Cyclotron Laboratory)
Jonathan Sheehan
(Michigan State University)
Jorge Pereira
(National Superconducting Cyclotron Laboratory)
Kailong Wang
(Central Michigan University)
Mallory Smith
(National Superconducting Cyclotron Laboratory)
Matthew Redshaw
(Central Michigan University)
Mihai Horoi
(Central Michigan University)
Pelagia Tsintari
(Central Michigan University)
Remco Zegers
(Michigan State University)
Sean Liddick
(Michigan State University)
Stephanie Lyons
(National Superconducting Cyclotron Laboratory)
Thomas Redpath
(Michigan State University)
