Deuterons from High-Energy Proton Bombardment of Matter

Butler, S. T.; Pearson, Colin

doi:10.1103/physrevlett.7.69

Cited by 112 publications

(71 citation statements)

References 7 publications

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“…The theoretical estimation of antideuteron production preformed in the article [1] are based on the well-known coalescence model [5] which supposes that two nucleons fuse into a deuteron if the momentum of their relative motion is smaller than a certain quantity p 0 , the coalescence radius in momentum space. This momentum p 0 is considered as a free parameter to be fixed from the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Antideuteron production in proton-proton and proton-nucleus collisions

2003

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Section: Introductionmentioning

confidence: 99%

Antideuteron production in proton-proton and proton-nucleus collisions

2003

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“…[1][2][3][4][5][6]. In this work, the brief outline of the theoretical model for predicting cross sections are described in the following subsections.…”

Section: Neutron Production Modelmentioning

confidence: 99%

“…In some cases a pair of particles, spatially near each other, and with similar momenta will coalesce to form heavier nuclei such as 2 H, 3 H, 3 He and α. In this work we use a coalescence model adapted from the work of Awes [7].…”

Section: The Coalescence Modelmentioning

confidence: 99%

“…In later work, the important effects of particle coalescence were partially incorporated [2] and the ablation stage was extended to include the target contributions. The basic assumption of coalescence is that during the knockout stage there are some nucleons that share the same volume and momentum space and they interact with each other to form heavier and more complex particles such as deuterons, tritons, helions, and alphas [2][3][4][5][6][7] to which the excess momentum and energies are transferred. Awes et al [7], for example, presented comparisons of deuteron cross sections detected from the collisions of 16 O + 238 U with the spectra predicted by using the coalescence model with the Coulomb repulsion from a Presenting author, e-mail: isripris@utk.edu the target nucleus.…”

Section: Introductionmentioning

confidence: 99%

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Improved model for secondary neutron production in nucleus-nucleus collision at intermediate energies

Townsend

Sriprisan

Cucinotta

2007

Nd2007

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Abstract. In previous work an analytical knockout-ablation coalescence model capable of making quantitative predictions of the neutron spectra from high-energy nucleon-nucleus and nucleus-nucleus collision has been developed. The physics of the knockout-ablation model is similar to that in intranuclear cascade codes using Monte Carlo methods. In the first or knockout stage, the collision between two nuclei results in one or more nucleons being knocked out of the projectile and/or the target nucleus. This results in an excited nucleus (called a prefragment), which is lighter than the original species. This excited prefragment decays to the ground state by emitting one or more nucleons, composites (such as deuterons or alphas) and gammas. This is the ablation (second) stage of the reaction. Significant improvements in model predictions were made previously by incorporating important coalescence effects into the formalism. Coalescence occurs when particles with similar momenta located close together in space recombine to form heavier nuclei, such as deuterons, 3 H and 3 He. In this work the important effects of alpha particle coalescence are included. The improved theory is described and results for predicted neutron and light ion energy and angular spectra are presented and compared with published measurements of secondary neutron and light ion production for a variety of collision pairs.

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“…In this picture the quark combinatorics approach echoes the statistical treatment of reactions of nucleus decays [3], and actually it was initiated by the success of the statistical methods in the description of multinucleon processes. There is one more common point in treating multinucleon and multiquark processes: the stage of final state interactions.…”

Section: Introductionmentioning

confidence: 99%

Quark combinatorics and meson-production ratios in hadronic Z 0 decays

2001

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Rich experimental data accumulated in the past few years in the hadronic Z 0 decays allow one to check the quark combinatorics relations for a new type of processes, namely: quark jets in the decays Z 0 → qq → hadrons. In this paper we review quark combinatorics rules for the yields of vector and pseudoscalar mesons, V /P , in the central and fragmentation regions of the hadronic Z 0 decays. It is stressed that in the central region a direct verification of quark combinatorics rules is rather problematic because of a considerable background related to the decay of highly excited resonances; however such a verification is possible in the fragmentation region, at x hadron ∼ 0.5 − 1, where the contribution of resonance decays is suppressed due to the rapid decrease of spectra with increasing x hadron . It is shown that the experimental data in the fragmentation region for ρ 0 /π 0 and p/π + are in a reasonable agreement with the predictions of quark combinatorics. The ratios of the heavy meson yields, B * /B and D * /D, are also discussed: the data demonstrate a good agreement with the quark combinatorial results. We analyse the structure of the suppression parameters for strange and heavy quark productions in soft processes and estimate their order of magnitudes in the multiperipheral processes; the ratio K ± /π ± at x hadron ∼ 0.5 − 0.8 and production probabilities of the cc and bb mesons are in a good agreement with the estimates.

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Deuterons from High-Energy Proton Bombardment of Matter

Cited by 112 publications

References 7 publications

Antideuteron production in proton-proton and proton-nucleus collisions

Antideuteron production in proton-proton and proton-nucleus collisions

Improved model for secondary neutron production in nucleus-nucleus collision at intermediate energies

Quark combinatorics and meson-production ratios in hadronic Z 0 decays

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