ELFT HÍRADÓ

[vidakris AT konkoly.hu]

Szemináriumi meghívó / Invitation to a seminar
----------------------------------------------

CSFK CSI SZEMINÁRIUM / KONKOLY OBSERVATORY SEMINAR

Date: Jun 27 (Thursday) 14:00


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

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



Everyone is welcome!

Krisztián Vida, Ramon Brasser
organizers
https://konkoly.hu/k-szeminariumok