Systematics of 24Na and 22Na production with 400 MeV protons

Korteling, R. G.; Caretto, A.A.

doi:10.1016/0022-1902(67)80117-9

Cited by 40 publications

(16 citation statements)

References 10 publications

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“…7 our results are compared with those of Noga et al [3] and the results of Korteling et al [1] for 400 MeV protons. 7 our results are compared with those of Noga et al [3] and the results of Korteling et al [1] for 400 MeV protons.…”

Section: Resultsmentioning

confidence: 52%

“…The contribution to the yield at high energies from the low-energy absorption processes was calculated using formula (1). For the bremsstrahlung spectrum an integrated Schiff spectrum was used.…”

Section: Resultsmentioning

confidence: 99%

“…Korteling et al [1,2] have measured the cross section for the production of 24Na from a number of elements in the region 12_<Z_<50 irradiated with protons of energies in the range 100 to 400 MeV. The 24Na production cross-section as a function of Z shows an exponential decrease for Z=<30, which is interpreted as a result of a pure cascadeevaporation process.…”

Section: Introductionmentioning

confidence: 99%

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Photoproduction of24Na from nuclei with 13≦Z≦29

1973

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Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photoproduction of24Na from nuclei with 13≦Z≦29

1973

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“…Open circles are based on the data at Ep м 10 GeV [9, 36, 38, 41, 42, 45, 46, 48Ϫ55, 57, 59, 61], and bold solid lines are the least-squares fits to the points. Closed circles [40] and squares [37] are on the data at E p ϭ 400 MeV and 700 MeV, respectively. Regular solid lines are the reproduction from open circles and bold solid lines and those at Ep ϭ 400 and 700 MeV by closed symbols.…”

Section: Comparison With Proton-induced Reactionmentioning

confidence: 99%

Target-dependence of light fragment production in photonuclear reactions at intermediate energies

Matsumura¹,

Washiyama²,

Haba³

et al. 2000

Radiochimica Acta

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in irradiations with bremsstrahlung having maximum end-point energies up to 1200 MeV were measured by γ-ray spectrometry ( 7 Be, 22 Na, 24 Na and 28 Mg) and accelerator mass spectrometry ( 10 Be). The yields of heavier fragments, 39 Cl,43, 44m, 44g,46,47, 48 Sc, 59 Fe,and 56,57,58,60 Co, were also measured by γ-ray spectrometry in order to survey the relative contribution of fragmentation to spallation and/or fission in the mass yield curves. A distinct difference of the target massdependence of these yields has made it possible to disentangle the contributions of photospallation and photofragmentation processes. It was found that the neutron-to-proton ratios of targets strongly affect the formation of the nuclei by fragmentation as revealed in the yields of the isotopic pairs as well as of the single isotopes. The photon results were compared with those of proton-induced reactions, and no clear effect due to the difference of the initial interactions of photons and protons with nuclei was found in the fragment yields.

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“…The main target elements for producing 22Na, [20][21][22] Ne and 26A1 in stony meteorites are Mg and Si.…”

Section: Discussionmentioning

confidence: 99%

Measurement of cross sections for 22Na, 20-22Ne and 36-42Ar in the spallation of Mg, Al, Si, Ca and Fe. Production ratios of some cosmogenic nuclides in meteorites

Baros

Regnier

1984

J. Phys. France

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2014 Nous avons mesuré, par spectrométrie de masse des gaz rares et par comptage 03B3, les sections efficaces 03C3 des réactions nucléaires conduisant à 22Na, 20-22Ne et 36-42Ar dans des cibles de Mg, Al, Si, Ca et Fe bombardées par des protons de 0,059 à 24 GeV. Ces nouvelles mesures et celles existant dans la littérature nous ont permis d'évaluer les rapports des sections efficaces 03C3R/03C3s en fonction de l'énergie de quatre paires d'isotopes, l'un stable S et l'autre radioactif R : 22Na/22Ne, 26Al/21Ne, 39Ar/38Ar et 36Cl/36Ar. Ces paires d'isotopes permettent de calculer l'âge d'exposition des météorites, si on connait le rapport de leur taux de production PR/PS. Notre travail établit des limites aux rapports PR/Ps dans les météorites de fer à partir de la seule considération des rapports 03C3R/03C3S. Dans les météorites de pierre on peut seulement montrer, par cette approche, l'importance des effets de composition chimique et de blindage. Abstract. 2014 We measured the cross sections of 22Na, 20,21,22Ne and 36,38,39,42Ar in nuclear reactions induced by the proton bombardment of Mg, Al, Si, Ca and Fe at several energies between 0.059 and 24 GeV using highsensitivy mass-spectrometry for noble gases and 03B3-counting for 22Na. We then evaluated the cross section ratio versus energy for the 22Na/22Ne, 26Al/21Ne, 39Ar/38Ar and 36Cl/36Ar radioactive-stable pairs of isotopes, which are useful for measuring the exposure age of meteorites. From the results alone, we can set some limits to the corresponding production ratios in iron meteorites, but not in stony objects because a knowledge of chemical abundances of Na, Mg, Al, Si, S, K, Ca, Fe, and shielding conditions are required.

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Systematics of 24Na and 22Na production with 400 MeV protons

Cited by 40 publications

References 10 publications

Photoproduction of24Na from nuclei with 13≦Z≦29

Photoproduction of24Na from nuclei with 13≦Z≦29

Target-dependence of light fragment production in photonuclear reactions at intermediate energies

Measurement of cross sections for 22Na, 20-22Ne and 36-42Ar in the spallation of Mg, Al, Si, Ca and Fe. Production ratios of some cosmogenic nuclides in meteorites

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