The 17th International Symposium on Origin of Matter and Evolution of Galaxies

Session

Nuclear Data for Astrophysics and Related Topics

8 Sept 2024, 17:10

48. Nuclear β-decay half-life and its impact on r-process nucleosynthesis

Yifei NIU (Lanzhou University)

08/09/2024, 17:10

Nuclear Data for Astrophysics and Related Topics

Oral Talk

Nuclear β-decay half-lives are basic nuclear physics inputs for rapid neutron-capture process (r-process) simulation. Since r-process path is far from the stability line, the accurate description of β-decay half-lives is important for r-process study. In this talk, I will introduce the improvement of β-decay half-life description by including the deformation degree of freedom and beyond...

72. Theoretical descriptions of nuclear masses and β-decay half-lives in the r-process studies

Zhongming NIU (Anhui University)

08/09/2024, 17:25

Nuclear Data for Astrophysics and Related Topics

Oral Talk

The origin of heavy elements in the universe is an important problem in basic science. The r-process is responsible for about half of the elements heavier than iron. Accurate theoretical predictions of nuclear masses and β-decay half-lives are crucial for understanding the r-process. This talk reports on recent progress in the development of various theoretical models and machine learning...

23. Effective lifetime of potential waiting-point $^{68}$Se in rp-process

Xing XU (Institute of Modern Physics, CAS)

08/09/2024, 17:40

Nuclear Data for Astrophysics and Related Topics

Oral Talk

Effective lifetime of a nuclide is the key parameter that can quantitatively estimate the degree of passing this nuclide in rp-process.
The mass of neutron-deficient isotope $^{70}$Kr, which has been directly measured by using $B\rho$-defined isochronous mass spectrometry, allows us to re-evaluate the effective stellar half-life of the potential waiting point $^{68}$Se in rp-process under...

8. Conceptual design of a neutron detector for (alpha, n) cross section measurement

Jianqi CHEN (Great Bay University)

08/09/2024, 17:55

Nuclear Data for Astrophysics and Related Topics

Oral Talk

Polyethylene-moderated 3He neutron detectors are widely used in the neutron flux monitor, fission neutron multiplicity measurement, (alpha, n), (gamma, n), and (n, xn) reaction cross-section measurements. However, this kind of detector faces a problem that their detection efficiency strongly depends on neutron emission angle and neutron energy when neutron energy rises above 1 MeV. Therefore,...

139. Direct reaction studies and opportunities in astrophysics

Jie CHEN

08/09/2024, 18:10

Oral Talk

98. Half-life of the one-proton emitter $^{149}$Lu with microscopic description of nuclear deformation

Shisheng ZHANG (BUAA)

Oral Talk