ELFT HÍRADÓ

[Maria Lugaro <maria.lugaro AT csfk.org>]

Szemináriumi meghívó / Invitation to a seminar
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CSFK CSI SZEMINÁRIUM / KONKOLY OBSERVATORY SEMINAR

Date: Jun 27 (Thursday) 14:00

Nuclear reaction studies on radionuclides at LANSCE with a focus on the
56Ni(n,p) reaction for the interest of νp process
Hye Young Lee (Los Alamos National Laboratory; USA)


For reaching out radioactive isotopes relevant for the νp process
nucleosynthesis, a new capability of producing radioactive isotopes at the
Isotope Production Facility and performing direct measurements via (n,p)
and (n,α) reactions has been commissioned at the Los Alamos Neutron Science
Center (LANSCE). To answer the heavy element production puzzles in
core-collapse supernova explosions, we studied the 56Ni(n,p) reaction,
which has been identified as one of critical reactions during the np
process. Using the hotLENZ (radioactive Low Energy NZ) instrument, the
cross sections of 56,59Ni(n,p), 56Co(n,p), and 59Ni(n,α) reactions were
first directly measured for deducing reaction rates. Updated 56Ni(n,p) and
56Co(n,p) reaction rates were compared with the current rates from REACLIB
(Cyburt 2010), and were used in hydrodynamics calculations using the
parameters from Wanajo et al. (2011) and Nishimura et al. (2019) along with
our parameters. The summary of astrophysical impacts will be discussed in
terms of potential further constrains of nuclear physics input to improve
our understanding of the np process network calculations. Ongoing efforts
on the radioactive 40K, 44Ti, and 26Al measurements and the status of the
optimized solenoidal spectrometer development for radioactive nuclear
reaction studies at LANSCE will be presented.


The seminar will be held live in the Detre hall with audience, but also
streamed online via Zoom. If you are unable to attend the presentation in
person, you can join us via this link
https://us06web.zoom.us/j/82806911982?pwd=SVZpT0syQ1J6dHBvSkF4N2dXNEQ0dz09
or the meeting ID: 828 0691 1982 and passcode: 206265