<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math>
-delayed neutron-emission and fission calculations within relativistic quasiparticle random-phase approximation and a statistical model

Minato, Futoshi; Marketin, Tomislav; Paar, Nils

doi:10.1103/physrevc.104.044321

Cited by 33 publications

(12 citation statements)

References 84 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with the evaluated nuclear data, our results are consistent within a 3σ error band. Furthermore, in Figure 4, our preliminary results for the P 1n values are compared with evaluated nuclear data from the ENSDF and some theoretical predictions: RHB+pn-RQRPA (2016) [13], FRDM+QRPA (2018) [4], and the proton-neutron Relativistic Quasiparticle Random-Phase Approximation plus Hauser-Feshbach statistical model (pn-RQRPA + HFM, 2021) [15]. Regarding the comparison with theoretical models, our data supports the overall trend for all P 1n predictions.…”

Section: Preliminary Resultssupporting

confidence: 70%

Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160)

et al. 2023

View full text Add to dashboard Cite

At the RIKEN Nishina Center, exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured. This work reports their half-lives (T1/2) and β-delayed neutron-emission probabilities (Pxn). The setup consisted of the BigRIPS in-flight separator for particle identification, the Advanced Implantation Detector Array (AIDA) for ions and β detection, and the BRIKEN neutron counter for neutron detection. Using this arrangement, 4 new T1/2 and 14 new P1n were measured. Furthermore, 38 T1/2 and 2 P1n values were remeasured, decreasing the uncertainties for some of them. In addition to improving predictions of nucleosynthesis models that describe the production of the rare-earth peak at A ∼ 160 via the r-process, these additional experimental data should help to constrain theoretical models for calculations of T1/2 and Pxn in this region.

show abstract

Section: Preliminary Resultssupporting

confidence: 70%

Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160)

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Figure 4 shows the measured half-lives compared to recent literature data (Wu et al 2017) and to theoretical predictions of the FRDM2012+QRPA+HF, RHB+QRPA, and pnFAM models, respectively (Marketin et al 2016;Möller et al 2019;Ney et al 2020). Furthermore, Figure 5 shows the derived neutron-emission probabilities compared with theoretical predictions calculated using the FRDM2012+QRPA +HF, RHB+QRPA, and pn-RQRPA+HF models (Marketin et al 2016;Möller et al 2019;Minato et al 2021). Table 1 lists the resulting T 1/2 and P 1n values of all isotopes studied in the present work.…”

Section: Data Analysis and Resultsmentioning

confidence: 99%

“…Experimental P 1n values derived in this work. Lines show the theoretical values from three models (Marketin et al 2016;Möller et al 2019;Minato et al 2021).…”

Section: Methodsmentioning

confidence: 99%

Measuring the β-decay Properties of Neutron-rich Exotic Pm, Sm, Eu, and Gd Isotopes to Constrain the Nucleosynthesis Yields in the Rare-earth Region

Kiss

Vitéz-Sveiczer

Saito

et al. 2022

ApJ

View full text Add to dashboard Cite

The β-delayed neutron-emission probabilities of 28 exotic neutron-rich isotopes of Pm, Sm, Eu, and Gd were measured for the first time at RIKEN Nishina Center using the Advanced Implantation Detector Array (AIDA) and the BRIKEN neutron detector array. The existing β-decay half-life (T 1/2) database was significantly increased toward more neutron-rich isotopes, and uncertainties for previously measured values were decreased. The new data not only constrain the theoretical predictions of half-lives and β-delayed neutron-emission probabilities, but also allow for probing the mechanisms of formation of the high-mass wing of the rare-earth peak located at A ≈ 160 in the r-process abundance distribution through astrophysical reaction network calculations. An uncertainty quantification of the calculated abundance patterns with the new data shows a reduction of the uncertainty in the rare-earth peak region. The newly introduced variance-based sensitivity analysis method offers valuable insight into the influence of important nuclear physics inputs on the calculated abundance patterns. The analysis has identified the half-lives of 168Sm and of several gadolinium isotopes as some of the key variables among the current experimental data to understand the remaining abundance uncertainty at A = 167–172.

show abstract

“…The above discussions outline the major impact of uncertain nuclear physics inputs on the actinide production in merger ejecta. Further development in nuclear theory modeling, e.g., [79][80][81][82][83][84], will continue to improve our understanding in this aspect. In the next section, we will discuss how they can possibly leave imprints on kilonova emission of BNSMs.…”

Section: Theory Requirements and Nuclear Physics Inputsmentioning

confidence: 99%

The production of actinides in neutron star mergers

Banerjee

2022

AAPPS Bull.

View full text Add to dashboard Cite

Although the multimessenger detection of the neutron star merger event GW170817 confirmed that mergers are promising sites producing the majority of nature’s heavy elements via the rapid neutron-capture process (r-process), a number of issues related to the production of translead nuclei—the actinides—remain to be answered. In this short review paper, we summarize the general requirements for actinide production in r-process and the impact of nuclear physics inputs. We also discuss recent efforts addressing the actinide production in neutron star mergers from different perspectives, including signatures that may be probed by future kilonova and γ-ray observations, the abundance scattering in metal-poor stars, and constraints put by the presence of short-lived radioactive actinides in the Solar system.

show abstract

β -delayed neutron-emission and fission calculations within relativistic quasiparticle random-phase approximation and a statistical model

Cited by 33 publications

References 84 publications

Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160)

Study of decay properties for Ba to Nd nuclei relevant for the formation of the r-process rare-earth peak (A∼160)

Measuring the β-decay Properties of Neutron-rich Exotic Pm, Sm, Eu, and Gd Isotopes to Constrain the Nucleosynthesis Yields in the Rare-earth Region

The production of actinides in neutron star mergers

Contact Info

Product

Resources

About