Magyar Tudományos Akadémia
Atommagkutató Intézet

Hoyle resonance and triple-alpha reactions in adiabatic hyperspherical method

Szeminárium Hoyle resonance and triple-alpha reactions in adiabatic hyperspherical method
Előadó

Suzuki Yasuyuki 1,2

1 Department of Physics, Niigata University, Niigata 950-2181, Japan, 2 RIKEN Nishina Center, Wako 351-0198, Japan
Időpont 2017.06.22 11:00
Helyszín MTA Atomki, nagyelőadó (Debrecen, Bem tér 18/c, XII. épület 3. emelet)
Esemény leírása

Hoyle state is the narrow near-threshold 0 + state in 12 C. It is well-known that the state plays an
important role in stellar nucleosynthesis. Its width is exremely small and its precise calculation is
challenging. We show an adiabatic hyperspherical coordinate method for calculating the bound and
continuum energy spectrum of three particles interacting through both short-range and Coulomb
potentials. A complex absorbing potential is employed to describe accurately the continuum wave
functions.
This method is further applied to study the triple-α reaction process at low temperatures. We
compute the triple-α reaction rate at temperatures from T = 0.01 to 10 GK and compare with those
available in the literature. Our reaction rate is found to be up to three orders of magnitude larger
than the NACRE rate at low temperatures T ≈ 0.01 GK, while we find a reasonable agreement
between them at higher temperatures T \grtsim \( \gtrsim\)0.1 GK.