Measurement of total photonuclear cross sections in the Δ-resonance region

Arends, J.; Eyink, J.; Hegerath, A.; Hilger, K.G.; Mecking, B. A.; Nöldeke, Georg; Rost, H.

doi:10.1016/0370-2693(81)90444-5

Cited by 71 publications

(13 citation statements)

References 6 publications

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“…3b is for a direction close to the sun (b = 0 • , ℓ = 30 • ). 6 It is clear that, if d max < ∼ 100 km, the maximum rates per unit coverage are attained in the night side for energies E ∼ 10 −2 -1 EeV (depending on the nucleus considered) and exceed one event per year for coverages JHEP03(1999)017…”

Section: Resultsmentioning

confidence: 98%

“…From this threshold up to ǫ ′ ≃ 600 MeV, the disintegration is dominated by the delta production (γN → ∆ → Nπ, where N is a nucleon). 2 In this regime, the cross section per nucleon is found to be almost independent of the target nucleus [6,7]. Due to nuclear Fermi motion and interaction effects, the peak in this cross section is reduced and the resonance becomes somewhat wider than in the free proton case.…”

Section: )mentioning

confidence: 92%

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On the disintegration of cosmic ray nuclei by solar photons

Epele¹,

Mollerach²,

Roulet³

1999

J. High Energy Phys.

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We discuss in detail the possibility of observing pairs of simultaneous parallel air showers produced by the fragments of cosmic ray nuclei which disintegrated in collisions with solar photons. We consider scenarios with different cosmic ray compositions, exploring the predicted rates for existing and planned detectors and looking for methods to extract information on the initial composition from the characteristics of the signal. In particular, we find that fluorescence detectors, such as HiRes or the Telescope Array, due to their low threshold (∼ 10 17 eV) and large area (∼ 10 4 km 2 ) may observe several events per year if cosmic rays at those energies are indeed heavy nuclei. The possibility of exploiting the angular orientation of the plane containing the two showers to further constrain the cosmic ray composition is also discussed.

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Section: Resultsmentioning

confidence: 98%

Section: )mentioning

confidence: 92%

On the disintegration of cosmic ray nuclei by solar photons

Epele¹,

Mollerach²,

Roulet³

1999

J. High Energy Phys.

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“…For the region of the A (1232) tot for resonance between 200 MeV and 400 MeV a~ 160 [14] is scaled according to the mass numbers by (32/16) l'~ as suggested in the same work [14]. Up to 2700 MeV a~ ~ for C and Cu by Arakelyan et al [16] are interpolated to obtain an estimation for 32S.…”

Section: =]/(Rt~mentioning

confidence: 99%

Fragmentation cross sections of32S at 0.7, 1.2 and 200 GeV/nucleon

Brechtmann

Heinrich

1988

Z. Physik A - Atomic Nuclei

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We used CR39 plastic nuclear track detectors (C~ 2H1807) in combination with automatic track measurement techniques to determine total charge changing and partial cross sections for the production of fragments of charge Zv=6 to ZF= 15 in collisions of 32S beam nuclei at energies of 0.7, 1.2 and 200 GeV/nucleon in targets H, C, CR39, CH2, A1, Cu, Ag and Pb. By application of factorization rules measured partial cross sections are separated into pure nuclear and electromagnetic components. Total and partial cross sections for electromagnetic dissociation are compared with theoretical models. The energy dependence of pure nuclear cross sections is investigated.

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“…Total photon absorption cross sections for (7, hadrons) for t60 were measured by Arends et al [15]. In the A-resonance region and at higher energies we assume that all channels are charged.…”

Section: A Theoretical Calculationsmentioning

confidence: 99%

Fragmentation cross sections of16O at 60 and 200 GeV/nucleon

Brechtmann

Heinrich

1988

Z. Physik A - Atomic Nuclei

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We used CR39 plastic nuclear track detectors (C t 2H1807) in combination with automatic track measurement to determine total charge changing and partial cross sections for the production of fragments of charge Z = 6 and Z = 7 in collisions of 160 beam nuclei at energies of 60 GeV/nucleon and 200 GeV/nucleon in targets H, C, CR39, CH2, AI, Cu, Ag and Pb. Total charge changing cross sections due to the process of electromagnetic dissociation are calculated based on a theoretical model and found to be consistent with total and partial electromagnetic dissociation cross sections derived from this experiment. The energy dependence of pure nuclear fragmentation is investigated. PACS: 25.70. Np;

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Measurement of total photonuclear cross sections in the Δ-resonance region

Cited by 71 publications

References 6 publications

On the disintegration of cosmic ray nuclei by solar photons

On the disintegration of cosmic ray nuclei by solar photons

Fragmentation cross sections of32S at 0.7, 1.2 and 200 GeV/nucleon

Fragmentation cross sections of16O at 60 and 200 GeV/nucleon

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