The Photodisintegration of the Deuteron at Intermediate Energies. I

Barnes, I.C.A.; Carver, J.H.; Stafford, G.H.; Wilkinson, D.H.

doi:10.1103/physrev.86.359

Cited by 56 publications

(12 citation statements)

References 53 publications

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“…For calibration the lithium was replaced by an identically cased cylinder containing heavy water, and in addition background runs were performed using a hollow cylinder. The cross section for D(y, n) at 6·2 MeV was taken from the work of Barnes et al (1952) and from it the cross section for 6Li (y, n) at the same energy was found to be (3 ±2) X 10-28 cm 2 . The rather large error in this case was due to the small isotopic abundance of 6Li in natural lithium; separated 6Li was not available in su:ffi<)ient quantity for a better measurement.…”

Section: Experimental Results (A) the Neutron Yield From The Spomentioning

confidence: 99%

Neutron Experiments with a Sensitive Szilard?Chalmers Detector

Edge¹

1956

Aust. J. Phys.

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SummaryThe Szilard-Chalmers reaction has been developed as a sensitive detector for the comparison of neutrons from sources of different primary energy and angular distribution. Using sodium permanganate solution, a detection efficiency of approximately 7 per cent. for all neutrons in the energy range 0--5 MeV was obtained and high accuracy achieved.The method of detection was employed to make the following measurements: {i) The neutron yield from the spontaneous fission of natural uranium was found to be (I· 56±0·12) X 10-2neutrons sec-1 g-l.(ii) The cross section for the reaction 6Li(y, n) at 6·2 MeV was found to be (3±2) X 10-28 cm 2 . (iii) The cross section for the reaction "Be(n, 2n) induced by Ra-Be and Po-Be sources of neutrons was found to be (0·37±0·06) X 10-2 • cm 2 . (iv) A limit was placed on the cross-over transition from the 2·5 MeV state to the ground state in 60CO. The transition probability was found to be less than 1 X 10-6 of that for the cascade consisting of the two y-rays.

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Section: Experimental Results (A) the Neutron Yield From The Spomentioning

confidence: 99%

Neutron Experiments with a Sensitive Szilard?Chalmers Detector

Edge¹

1956

Aust. J. Phys.

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“…The radiation was inonitored with a brass Geiger counter of similar construction to that calibrated by Barnes et al (1952) having an efficiency a t the mean effective photo11 eilergy of 16.4 Mev of 2.5 counts per photon per Can. J. Phys.…”

Section: E X P E R I M E N T a L Apparr\tgs (A) Source Of Radiation Amentioning

confidence: 99%

The Photodisintegration of Neon

Hay¹,

Warren²

1959

Can. J. Phys.

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A proportional counter, filled to 4-atmosphere pressure with pure neon, and a cylindrical gridded ionization chamber, filled to 9-atmosphere pressure with neon containing some helium, have been irradiated with the gamma-ray flux from a thick lithium target bombarded with 500-kev protons. Pulse height analysis led to the assignment of the following photodisintegration cross sections in millibarns:Ne20(γ17.6, α)O16, 0.05 to the ground state of O16, 0.67 to the 6.06- and 6.14-Mev levels of O16, 1.80 to the 6.91- and 7.12-Mev levels of O16;Ne20(γ14.8, α)O16, 0.086 to the ground state, about 1.0 to the 6.06- and 6.14-Mev levels;Ne20(γ17.6, p)F19, 21 to the ground and low-lying levels at 110, 197 kev in F19, about 5 to the 1.35- and/or 1.57-Mev levels in F19;Ne22(γ17.6, α)O18, 0.76 to the ground level.The Ne20(γ, α)O16 cross sections are in good accord with the selection rules put forward by Gell-Mann and Telegdi for the photodisintegration of an even–even nucleus.

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“…Data for this reaction [6], or data extracted from the inverse d ! pn reaction [7][8][9][10][11] by the principle of detailed balance, are scarce and show unsatisfactory scattering. As a result, the uncertainties of the data induce similar substantial uncertainties of the extracted abundances, especially for 2 H and 7 Li [5,12,13].…”

mentioning

confidence: 99%

“…4 summarizes all available data for photoinduced deuteron breakup at energies close to the threshold [7][8][9][10][11]. We also include the pn !…”

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Measurement of the ReactionH2(e,e′)at 180° Close to the Deuteron Breakup Threshold

et al. 2008

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Inclusive inelastic electron scattering off the deuteron under 180 degrees has been studied at the S-DALINAC close to the breakup threshold at momentum transfers q=0.27 fm;{-1} and 0.74 fm;{-1} with good energy resolution sufficient to map in detail the spin flip M1 response, which governs the starting reaction pn-->dgamma of big-bang nucleosynthesis over most of the relevant temperature region. Results from potential model calculations and (for q=0.27 fm;{-1}) from pionless nuclear effective field theory are in excellent agreement with the data.

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The Photodisintegration of the Deuteron at Intermediate Energies. I

Cited by 56 publications

References 53 publications

Neutron Experiments with a Sensitive Szilard?Chalmers Detector

Neutron Experiments with a Sensitive Szilard?Chalmers Detector

The Photodisintegration of Neon

Measurement of the ReactionH2(e,e′)at 180° Close to the Deuteron Breakup Threshold

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