Theoretical and Experimental Perspectives of Nuclear Reaction Studies with Radioactive Ion Beams

Cizewski, J. A.; Nunes, F. M.

doi:10.5506/aphyspolb.46.521

Cited by 4 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The past few years has seen a dramatic increase in the quantity and quality of experimental data for neutron-rich nuclei important for the r process, e.g., [76,77,78,79,80,81,82,83,84,85,54,86,87,88,89,90,25,91,92,93,94,56]. Future measurement campaigns at current and planned experimental facilities such as the Facility for Rare Isotope Beams, will offer an unprecedented access to the production of short-lived isotopes [95].…”

Section: Discussionmentioning

confidence: 99%

Reverse engineering nuclear properties from rare earth abundances in therprocess

Mumpower

McLaughlin

Surman

et al. 2017

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

Abstract. The bulk of the rare earth elements are believed to be synthesized in the rapid neutron capture process or r process of nucleosynthesis. The solar r-process residuals show a small peak in the rare earths around A ∼ 160, which is proposed to be formed dynamically during the end phase of the r process by a pileup of material. This abundance feature is of particular importance as it is sensitive to both the nuclear physics inputs and the astrophysical conditions of the main r process. We explore the formation of the rare earth peak from the perspective of an inverse problem, using Monte Carlo studies of nuclear masses to investigate the unknown nuclear properties required to best match rare earth abundance sector of the solar isotopic residuals. When nuclear masses are changed, we recalculate the relevant β-decay properties and neutron capture rates in the rare earth region. The feedback provided by this observational constraint allows for the reverse engineering of nuclear properties far from stability where no experimental information exists. We investigate a range of astrophysical conditions with this method and show how these lead to different predictions in the nuclear properties influential to the formation of the rare earth peak. We conclude that targeted experimental campaigns in this region will help to resolve the type of conditions responsible for the production of the rare earth nuclei, and will provide new insights into the longstanding problem of the astrophysical site(s) of the r process. arXiv:1609.09858v1 [nucl-th] 30 Sep 2016Reverse engineering nuclear properties from rare earth abundances in the r process 2

show abstract

Section: Discussionmentioning

confidence: 99%

Reverse engineering nuclear properties from rare earth abundances in therprocess

Mumpower

McLaughlin

Surman

et al. 2017

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

“…These reactions have been measured at RIKEN by Fukuda et al [15] and various breakup observables have been obtained. 3 They therefore constitute excellent test cases for our study.…”

Section: Breakup Of 11 Be On Pb and C At 70 Mev/nucleon With Halo-eft...mentioning

confidence: 99%

“…The 10 Be-Pb interaction is simulated by an α-Pb optical potential [68] scaled to account for the different size of the nuclei. Since, at this energy, this reaction is dominated by Coulomb excitation of 11 Be the 3 Note that we refrain from discussing the GSI data by Palit et al [14] since they are at a much higher beam energy of 520 MeV/nucleon where a relativistic effects may be important.…”

Section: Breakup Of 11 Be On Pb and C At 70 Mev/nucleon With Halo-eft...mentioning

confidence: 99%

See 1 more Smart Citation

Dissecting reaction calculations using halo effective field theory and ab initio input

2018

View full text Add to dashboard Cite

We present a description of the break-up of halo nuclei in peripheral nuclear reactions by coupling a model of the projectile motivated by Halo Effective Field Theory with a fully dynamical treatment of the reaction using the Dynamical Eikonal Approximation. Our description of the halo system reproduces its long-range properties, i.e., binding energy and asymptotic normalization coefficients of bound states and phase shifts of continuum states. As an application we consider the break-up of 11 Be in collisions on Pb and C targets. Taking the input for our Halo-EFT-inspired description of 11 Be from a recent ab initio calculation of that system yields a good description of the Coulombdominated breakup on Pb at energies up to about 2 MeV, with the result essentially independent of the short-distance part of the halo wave function. However, the nuclear dominated break-up on C is more sensitive to short-range physics. The role of spectroscopic factors and possible extensions of our approach to include additional short-range mechanisms are also discussed.

show abstract

“…The recent advent of Penning trap and ion storage ring technology has spurred a significant increase in both the quantity and quality (high precision) of nuclear mass measurements [61][62][63][64][65][66][67][68][69]. The coupling of these techniques with radioactive ion beam facilities and future technological advances will open extensive regions of the nuclear chart for measurement [44,[70][71][72][73], including neutron-rich nuclei of interest for the r process [11]. It is not unreasonable to expect that in the next few years, new measurements will be able to shed light on what sort of astrophysical conditions the rare earth peak, and therefore the main r process, formed.…”

Section: Y(a)mentioning

confidence: 99%

The Link Between Rare-Earth Peak Formation and the Astrophysical Site of the R Process

Mumpower

McLaughlin

Surman

et al. 2016

ApJ

View full text Add to dashboard Cite

The primary astrophysical source of the rare earth elements is the rapid neutron capture process (r process). The rare earth peak that is seen in the solar r-process residuals has been proposed to originate as a pile-up of nuclei during the end of the r process. We introduce a new method utilizing Monte Carlo studies of nuclear masses in the rare earth region, that includes self-consistently adjusting β-decay rates and neutron capture rates, to find the mass surfaces necessary for the formation of the rare earth peak. We demonstrate our method with two types of astrophysical scenarios, one corresponding conditions typical of core-collapse supernova winds and one corresponding to conditions typical of the ejection of the material from the tidal tails of neutron star mergers. In each type of astrophysical conditions, this method successfully locates a region of enhanced stability in the mass surface that is responsible for the rare earth peak. For each scenario, we find that the change in the mass surface has qualitatively different features, thus future measurements can shed light on the type of environment in which the r process occurred.

show abstract

Theoretical and Experimental Perspectives of Nuclear Reaction Studies with Radioactive Ion Beams

Cited by 4 publications

References 14 publications

Reverse engineering nuclear properties from rare earth abundances in therprocess

Reverse engineering nuclear properties from rare earth abundances in therprocess

Dissecting reaction calculations using halo effective field theory and ab initio input

The Link Between Rare-Earth Peak Formation and the Astrophysical Site of the R Process

Contact Info

Product

Resources

About