Scaling of the 4He(γ,p)t reaction in the Eγ = 80–160 MeV region

Schmieden, H.; MacGregor, I. J. D.; Owens, R.O.; Schoch, B.; Annand, J. R. M.; Beck, R.; Doran, S.M.; Hall, S.J.; Kellie, J.D.; McGeorge, J. C.; Vogt, J.

doi:10.1016/0370-2693(93)91237-h

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…The secondary interactions, or Final State Interactions (FSI), lead to significant multi-nucleon ejections in the case of mid-mass and heavy nuclei [13]. The investigation of the 4 He(γ, p) 3 H reaction [36] using tagged photons of energy 80-160 MeV established that a significant 16 O, 27 Al and Cu targets using 340 MeV Bremsstrahlung beam. Reprinted (figure) with permission from [12], Copyright (1956) by the American Physical Society.…”

Section: Interaction Of Energetic Photons (Eγ > 40 Mev) With Nucleimentioning

confidence: 99%

“…A detailed review of the sub-threshold production of pions in heavy ion collisions was carried out by Braun-Munzinger and Stachel [96]. The sub-threshold kaon production for 36 Ar projectile with 92 MeV A −1 energy was measured for 12 C, nat Ti and 181 Ta targets [97]. Assuming the validity of the Fermi-momentum distribution, Bertsch [98] showed that the pion production cannot take place in nucleus-nucleus collisions below 50 MeV A −1 .…”

Section: Backscattering Of Hadrons and Sub-threshold Production Of En...mentioning

confidence: 99%

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Nucleon-nucleon correlations inside atomic nuclei: synergies, observations and theoretical models

Dalal,

Douglas MacGregor

2024

Rep. Prog. Phys.

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While the main features of atomic nuclei are well described by nuclear mean-field models, there is a large and growing body of evidence which indicates an important additional role played by spatially-correlated nucleon-nucleon structures. The role of nucleonic structures was first suggested by Heidmann in 1950 to explain the pick-up reactions of energetic nucleons. Since then, a steady flux of new experimental evidence has confirmed the presence of similar structures inside atomic nuclei, dominated by correlations between pairs of nucleons. The role of these internal nucleon-nucleon correlations has been established using various energetic probes like photons, pions, leptons and hadrons. These correlated structures are essential for understanding the interaction of particles with nuclei and their presence provides an explanation of many specific nuclear phenomena, including backscattered protons, copious deuteron production, sub-threshold particle production, neutrino interactions with nuclei and the EMC effect. On the theoretical side, these measurements have stimulated a large number of phenomenological models specifically devised to address these enigmatic observations. While reviews exist for specific interactions, there is currently no published commentary which systematically encompasses the wide range of experimental signatures and theoretical frameworks developed thus far. The present review draws together the synergies between a wide range of different experimental and theoretical studies, summarises progress in this area and highlights outstanding issues for further study.

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Section: Interaction Of Energetic Photons (Eγ > 40 Mev) With Nucleimentioning

confidence: 99%

Section: Backscattering Of Hadrons and Sub-threshold Production Of En...mentioning

confidence: 99%

Nucleon-nucleon correlations inside atomic nuclei: synergies, observations and theoretical models

Dalal,

Douglas MacGregor

2024

Rep. Prog. Phys.

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show abstract

“…The secondary interactions, or Final State Interactions (FSI), lead to significant multi-nucleon ejections in the case of mid-mass and heavy nuclei [13]. The investigation of the 4 He(γ, p) 3 H reaction [32] using tagged photons of energy 80-160 MeV established that a significant fraction of (γ, p) events originated from quasi-deuteron photo-absorption followed by neutron reabsorption. Incidentally, this also explained the observation of much higher cross-sections for (γ, n) processes compared to those expected from traditional quasi-free knockout.…”

Section: Interaction Of Energetic Photons (E γ > 40 Mev) With Nucleimentioning

confidence: 99%

Nucleon-nucleon correlations inside atomic nuclei: synergies, observations and theoretical models

Dalal¹,

MacGregor²

2022

Preprint

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While the main features of atomic nuclei are well described by nuclear mean-field models, there is a large and growing body of evidence which indicates an important additional role played by spatially-correlated nucleon-nucleon structures. The role of nucleonic structures was first suggested by Heidmann in 1950 to explain pick-up reactions of energetic nucleons. Since then a steady flux of new experimental evidence has confirmed the presence of similar structures inside atomic nuclei, dominated by correlations between pairs of nucleons. The role of these internal nucleon-nucleon correlations has been established using various energetic probes like photons, pions, leptons and hadrons. These correlated structures are essential for understanding the interaction of particles with nuclei and their presence provides an explanation of many specific nuclear phenomena including backscattered protons, copious deuteron production, sub-threshold particle production, neutrino interactions with nuclei and the EMC effect. On the theoretical side, these measurements have stimulated a large number of phenomenological models specifically devised to address these enigmatic observations. While reviews exist for specific interactions, there is currently no published commentary which systematically encompasses the wide range of experimental signatures and theoretical frameworks developed thus far. The present review draws together the synergies between a wide range of different experimental and theoretical studies, summarises progress in this area and highlights outstanding issues for further study.

show abstract