New studies and a short review of heavy neutron-rich transfer products

Devaraja, H. M.; Heinz, S.; Ackermann, D.; Göbel, T; Heßberger, F. P.; Hofmann, S.; Maurer, J.; Münzenberg, G.; Popeko, A. G.; Yeremin, A. V.

doi:10.1140/epja/s10050-020-00229-2

Cited by 22 publications

(17 citation statements)

References 93 publications

(171 reference statements)

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“…Significant progress has been made in theoretical predictions of nuclear masses using microscopic-macroscopic models, density functional models, and machine learning techniques [267,268]. A better theoretical understanding of fission at the endpoint of the r-process path (A∼300) has shown that these processes affect rprocess nucleosynthesis [269,270]. Predictions of reaction rates for heavy nuclei rely on accurate optical potentials, and efforts are underway to calculate these from first principles [18,271].…”

Section: How Did We Get Here?mentioning

confidence: 99%

“…Other facilities around the world, like FAIR in Europe, ISAC-ARIEL in Canada, and RIKEN/RIBF in Japan are also producing nuclei far from stability in complementary ways. A more niche but no less important path to heavy neutron-rich nuclides will be offered by multinucleon transfer reactions at JYFL and FAIR [326,269]. The experimental techniques and devices required to take advantage of the new beams have mostly been developed.…”

Section: What Needs To Be Done?mentioning

confidence: 99%

“…Another challenge is understanding nuclear fission at the endpoint of the rprocess. Fission rates and fragment distributions influence the abundances of lighter elements produced in the r-process [269,270] and will remain out of reach of experimental facilities for the foreseeable future. Further advances of the nuclear theory of fission and benchmarking fission models with experiments will be important as well as the development of new approaches to synthesize a broader range of actinide isotopes in the laboratory [333,208].…”

Section: What Needs To Be Done?mentioning

confidence: 99%

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Horizons: Nuclear Astrophysics in the 2020s and Beyond

Schatz,

Reyes,

Best

et al. 2022

Preprint

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Nuclear Astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand the nuclear engines of astronomical objects and the origin of the chemical elements. This white paper summarizes progress and status of the field, the new open questions that have emerged, and the tremendous scientific opportunities that have opened up with major advances in capabilities across an ever growing number of disciplines and subfields that need to be integrated. We take a holistic view of the field discussing the unique challenges and opportunities in nuclear astrophysics in regards to science, diversity, education, and the interdisciplinarity and breadth of the field. Clearly nuclear astrophysics is a dynamic field with a bright future that is entering a new era of discovery opportunities.

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Section: How Did We Get Here?mentioning

confidence: 99%

Section: What Needs To Be Done?mentioning

confidence: 99%

Section: What Needs To Be Done?mentioning

confidence: 99%

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Horizons: Nuclear Astrophysics in the 2020s and Beyond

Schatz,

Reyes,

Best

et al. 2022

Preprint

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“…[35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]) and by new experimental results (see e.g. [10,11,[55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71]).…”

Section: Introductionmentioning

confidence: 99%

Nucleosynthesis in multinucleon transfer reactions

Heinz

Devaraja

2022

Eur. Phys. J. A

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How does one populate still vacant areas on the chart of nuclides? Mainly on the neutron-rich side several thousand further isotopes are expected to exist, including most of the nuclei along the astrophysical r-process path. The standard nucleosynthesis reactions, which are fragmentation, fission and fusion, are reaching their limits. Therefore, other pathways to exotic nuclei are needed. Years ago, the idea arose to revive multinucleon transfer reactions to progress toward the neutron-rich side of heavy and superheavy nuclei. Meanwhile, this option is investigated in nuclear physics labs worldwide. Beside new studies of transfer product kinematics and cross-sections, the development of suitable separation and detection techniques for heavy transfer products is ongoing. But how promising are these new advances? So far achieved results allow us to get an impression on the potential which multinucleon transfer reactions provide for nucleosynthesis.

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“…In the last two decades, a new class of magnetic separators [10][11][12] with large acceptance, has been put to use in the study of MNT reactions [13][14][15]. Production of neutron-rich nuclides in damped collisions has been studied recently with novel applications of a few recoil separators which were not originally designed and built for this purpose [16][17][18]. Production of nuclei far from the stability region in multi-nucleon transfer reactions using a high resolution magnetic spectrometer has also been reported recently [19].…”

Section: Introductionmentioning

confidence: 99%

Determination of $1p$ and $2p$ stripping excitation functions for $^{16}$O+$^{142}$Ce using a Recoil Mass Spectrometer

Biswas¹,

Nath²,

Gehlot³

et al. 2021

Preprint

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We report the first direct measurement of differential transfer cross sections using a Recoil Mass Spectrometer. Absolute differential 1p and 2p-stripping cross sections at θ c.m. = 180 • have been determined for the system 16 O+ 142 Ce by detecting the heavier target-like ions at the focal plane of the Heavy Ion Reaction Analyzer. Focal plane spectra have been compared with the results of a semi-microscopic Monte-Carlo simulation to unambiguously identify the transfer channels. Transmission efficiency of the target-like ions through the spectrometer has also been estimated using the simulation which has been crucial to extract the cross sections from the yields of ions measured during the experiment. The methodology adopted in this work can be applied to measure multi-nucleon transfer cross sections using other similar recoil separators. The experimental excitation functions for the reactions 142 Ce( 16O, 15 N) 143 Pr and 142 Ce( 16 O, 14 C) 144 Nd have been compared with coupled reaction channel calculations. An excellent matching between measurement and theory has been obtained. For 1p-stripping, major contribution to the cross section has been found to be the transfer of a proton from 16 O to the 2d 5 2 excited state of 143 Pr, leaving behind 15 N in the 1p 1 2 ground state. Transfer of a cluster of two protons from 16 O to the 2 + excited state of 144 Nd, resulting in 14 C in the 0 + ground state, appears to be the most probable cause for 2p-stripping. Measured transfer probabilities for 1p and 2p channels have been compared with Time-Dependent Hartree-Fock calculations. Proton stripping channels are found to be more favourable compared to neutron pick-up channels. However, the theory overpredicts the measurement hinting at the need for extended approaches with explicit treatment of pairing correlations in the calculations.

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New studies and a short review of heavy neutron-rich transfer products

Cited by 22 publications

References 93 publications

Horizons: Nuclear Astrophysics in the 2020s and Beyond

Horizons: Nuclear Astrophysics in the 2020s and Beyond

Nucleosynthesis in multinucleon transfer reactions

Determination of $1p$ and $2p$ stripping excitation functions for $^{16}$O+$^{142}$Ce using a Recoil Mass Spectrometer

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