Direct measurement of stellar neutron capture rates of $^{14}$C and comparison with the Coulomb breakup method

Reduction of the neutron imaginary potential off the stability line and its possible impact on neutron capture rates

Physical Review C ◽

10.1103/physrevc.104.015805 ◽

2021 ◽

Vol 104 (1) ◽

Author(s):

A. V. Voinov ◽

K. Brandenburg ◽

C. R. Brune ◽

R. Giri ◽

S. M. Grimes ◽

...

Keyword(s):

Neutron Capture ◽

Imaginary Potential ◽

The Stability ◽

Capture Rates ◽

Stability Line

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Measuring neutron capture rates on ILL-produced unstable isotopes (147Pm, 171Tm and 204Tl, and plans for 79Se and 163Ho) for nucleosynthesis studies

EPJ Web of Conferences ◽

10.1051/epjconf/201819304007 ◽

2018 ◽

Vol 193 ◽

pp. 04007

Author(s):

J. Lerendegui-Marco ◽

C. Guerrero ◽

C. Domingo-Pardo ◽

A. Casanovas ◽

R. Dressler ◽

...

Keyword(s):

Stable Isotopes ◽

Cross Sections ◽

Neutron Capture ◽

Research Reactor ◽

Capture Cross ◽

Preliminary Results ◽

The Future ◽

Capture Rates ◽

Future Plans ◽

Capture Cross Sections

Neutron capture cross sections are among the main inputs for nucleosynthesis network calculations. Although well known for the majority of the stable isotopes, this quantity is still unknown for most of the unstable isotopes of interest. A recent collaboration between ILL, PSI, U. Sevilla and IFIC aims at producing the isotopes of interest at ILL, preparing suitable targets at PSI, and measuring their capture cross sections at facilities such as n_TOF/CERN, LiLiT and the Budapest Research Reactor (BRR). This work is focused on the description of the different beams and techniques and shows some highlights of the preliminary results of the capture measurements on 171Tm, 147Pm and 204Tl, along with the future plans for 79Se and 163Ho.

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Neutron capture rates of C18

Physical Review C ◽

10.1103/physrevc.99.035801 ◽

2019 ◽

Vol 99 (3) ◽

Author(s):

M. Dan ◽

G. Singh ◽

R. Chatterjee ◽

Shubhchintak

Keyword(s):

Neutron Capture ◽

Capture Rates

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Sensitivity studies for the weak r process: neutron capture rates

AIP Advances ◽

10.1063/1.4867191 ◽

2014 ◽

Vol 4 (4) ◽

pp. 041008 ◽

Cited By ~ 27

Author(s):

R. Surman ◽

M. Mumpower ◽

R. Sinclair ◽

K. L. Jones ◽

W. R. Hix ◽

...

Keyword(s):

Neutron Capture ◽

Sensitivity Studies ◽

R Process ◽

Capture Rates

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Computing Neutron Capture Rates in Neutron-Degenerate Matter

Universe ◽

10.3390/universe5010036 ◽

2019 ◽

Vol 5 (1) ◽

pp. 36

Author(s):

Bryn Knight ◽

Liliana Caballero

Keyword(s):

Cross Section ◽

Power Law ◽

Cross Sections ◽

Neutron Capture ◽

Chemical Potential ◽

Distribution Functions ◽

Analytical Integration ◽

Thermodynamic Conditions ◽

The Cross ◽

Capture Rates

Neutron captures are likely to occur in the crust of accreting neutron stars (NSs). Their rate depends on the thermodynamic state of neutrons in the crust. At high densities, neutrons are degenerate. We find degeneracy corrections to neutron capture rates off nuclei, using cross sections evaluated with the reaction code TALYS. We numerically integrate the relevant cross sections over the statistical distribution functions of neutrons at thermodynamic conditions present in the NS crust. We compare our results to analytical calculations of these corrections based on a power-law behavior of the cross section. We find that although an analytical integration can simplify the calculation and incorporation of the results for nucleosynthesis networks, there are uncertainties caused by departures of the cross section from the power-law approach at energies close to the neutron chemical potential. These deviations produce non-negligible corrections that can be important in the NS crust.

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