15th International Conference on Nuclear Data for Science and Technology (ND2022)

Session

Nuclear Astrophysics

26 Jul 2022, 09:30

Capitol

Conveners

Nuclear Astrophysics

• Lawrence Heilbronn (UTK)

109. High precision re-determination of the half-lives of $^{146}$Sm, $^{148}$Gd, and $^{154}$Dy.

Nadine Mariel Chiera

26/07/2022, 09:30

Radioisotopes with half-lives (t$_{1/2}$) in the order of millions of years play an essential role in the description of galactic events, as well as in the nuclear dating of extraterrestrial samples. Among the different benchmark radionuclides for astrophysics and geophysics studies, the radio-lanthanides $^{146}$Sm, $^{148}$Gd and $^{154}$Dy are of especial interest. In fact, through the pure...

102. Neutron capture cross-section measurements of Mn-53

Dr Rugard Dressler (Paul Scherrer Institute)

26/07/2022, 09:54

Short-lived radionuclides, i.e., radioactive isotopes with half-lives less than 100 Ma, were present in the proto-solar cloud and during the early phases of the formation of our Solar system. The origin of individual short-lived radionuclides is still under debate. Due to the comparatively short half-lives, these isotopes are nowadays not present in cosmic samples, but are recognizable as...

104. $^{77,78}$Se(n,$\gamma$) and $^{68}$Zn(n,$\gamma$) Cross-section Measurements at n\_TOF Relevant for the Astrophysical $s$-process

Nikolay Sosnin (University of Edinburgh)

26/07/2022, 10:06

Around half of the elements heavier than iron are produced via the slow neutron capture process ($s$-process), whereby a seed nucleus undergoes a series of neutron captures and beta decays, with the timescales of the captures being slower than those of beta decays. The $s$-process is further subdivided into several different components which occur in different types of stars. Of particular...

107. Measurement of the 140Ce(n,γ) cross section at astrophysical energies at n_TOF

Simone Amaducci (Laboratori Nazionali del Sud (IT))

26/07/2022, 10:18

It is well ascertained since the late '50, that the vast majority of the elements above the iron peak are synthesized in stars, via sequences of neutron captures and β-decays. Among the nucleosynthesis mechanisms, the slow (s-)process represents one of the better known and is very effective into modelling the stellar evolution. Thanks to the high accuracy of the nuclear data available in the...

105. (WITHDRAWN) New experimental decay data for nuclei around $^{78}$Ni and its astrophysical impact

Dr Alvaro Tolosa-Delgado (University of Jyvaskyla, Finland), BRIKEN collaboration BRIKEN collaboration (BRIKEN collaboration)

26/07/2022, 10:30

How elements are made in the Universe is an open long-standing question. Several processes are invoked to explain the observed elemental abundances in our Solar System [1] and in our Galaxy [2].
Complex simulations of astrophysical events are used to study the origin of the heavy elements and quantify the contribution of the r-process to the observed elemental abundances [3]. This process...

101. (WITHDRAWN) Global alpha-nucleus optical potential for applications

Paraskevi Dimitriou (International Atomic Energy Agency), Dr Stéphane Goriely (ULB)

The global semi-macroscopic alpha-nucleus optical potential developed in 2002 [1] has been widely used in calculations of alpha-nucleus reactions, especially since it was implemented in the nuclear reaction code TALYS.
The result of the widespread use of the global semi-microscopic alpha optical potential in calculations of reaction cross sections of medium- and heavy mass nuclei that have...

99. (WITHDRAWN) The $^2H(p,\gamma)^3He$ reaction at BBN energies: implications in Cosmology, particle physics and theoretical nuclear physics

Carlo Gustavino

The LUNA collaboration has recently completed the measurement of the $D(p,γ)^3He$ cross section at Big Bang Nucleosynthesis (BBN) energies with unprecedented precision. The study of this deuterium-burning process provides a precise determination of the universal baryon density $\Omega_b$, in excellent agreement with the value derived from CMB. The new data also provide a stringent constrain...