Radiative capture in nickel and bismuth of neutrons in the MeV region

Bergqvist, I.; Lundberg, B.; Nilsson, L.; Starfelt, N.

doi:10.1016/0375-9474(68)90066-3

Cited by 18 publications

(4 citation statements)

References 31 publications

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“…21), which is well established by measurements of several authors [117][118][119]. Additional experimental values for neutron energies in the keV and MeV region are given in [120][121][122][123]. The fact that 59 Ni is mainly produced by thermal neutrons is illustrated in Fig.…”

Section: Discussion Of 59 Nisupporting

confidence: 52%

The dosimetry system DS86 and the neutron discrepancy in Hiroshima - historical review, present status, and future options

Rühm¹,

Kellerer²,

Korschinek

et al. 1998

Radiation and Environmental Biophysics

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The historical development of the dosimetry systems for Hiroshima and Nagasaki is outlined from the time immediately after the A-bomb explosions to the publication of the dosimetry system DS86 in 1987, and the present status of the so-called Hiroshima neutron discrepancy is summarized. Several long-lived radionuclides are discussed with regard to their production by neutrons from the A-bomb explosions. With the exception of 63Ni, these radionuclides have not, up to now, been measured in samples from Hiroshima and Nagasaki. Two of them, 63Ni in copper samples and 39Ar in granite samples, were predominantly produced by fast neutrons. 63Ni can be determined by accelerator mass spectrometry with a gas-filled analyzing magnet. It should be measurable, in the near future, in copper samples up to 1500 m from the hypocenter in Hiroshima. 39Ar can be measured in terms of low-level beta-counting. This should be feasible up to a distance of about 1000 m from the hypocenter. Three radionuclides, 10Be, 14C, and 59Ni, were produced predominantly by thermal neutrons with smaller fractions due to the epithermal and fast neutrons, which contribute increasingly more at larger distances from the hypocenter. State-of-the-art accelerator mass spectrometry is likely to permit the determination of 10Be close to the hypocenter and of 14C up to a distance of about 1000 m. 59Ni should be detectable up to a distance of about 1000 m in terms of accelerator mass spectrometry with a gas-filled magnet. The measurements of 10Be, 14C, 39Ar, 59Ni -- and potentially of 131Xe -- can be performed in the same granitic sample that was already analyzed for 36Cl, 41Ca, 6Co, 152Eu, and 154Eu. This will provide extensive information on the neutron spectrum at the specified location, and similarly complete analyses can conceivably be performed on granite samples at other locations.

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Section: Discussion Of 59 Nisupporting

confidence: 52%

The dosimetry system DS86 and the neutron discrepancy in Hiroshima - historical review, present status, and future options

Rühm¹,

Kellerer²,

Korschinek

et al. 1998

Radiation and Environmental Biophysics

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“…The binding energy of the neutron in z~ is -3.87 MeV. The parameter A E was chosen [6,7] as A E= 7 MeV.…”

Section: ~--(~D--i~bt)+ Rdmentioning

confidence: 99%

Direct and compound contributions to (n, ?) cross sections

Mantzouranis

1973

Z. Physik

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“…The sample was placed on axis and inclined at an angle of 45" with respect to the incident beam. The spectrometer consists of a NaI(T1) crystal, 22.6 cm in diameter and 20.8 cm long, viewed by seven RCA 8054 photomultipliers (6). The energy resolution was 9.29; for the 0.662 MeV gamma-ray line from 137Cs, A block diagram of the electronic equipment is shown in Fig.…”

Section: Experimental Arrangement and Proceduresmentioning

confidence: 99%

“…The response functions at intermediate energies were calculated by interpolation as described in ref. [6].…”

Section: Experimental Arrangement and Proceduresmentioning

confidence: 99%

Gamma Rays from Neutron Resonance Capture in Mg, Si, P and S

Lundberg

Bergqvist

1970

Phys. Scr.

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The gamma-ray spectra from neutron resonance capture in Mg, Si, P and S (natural samples) in the energy range 10-75 keV have been recorded. The gamma-ray spectrometer was a NaI(Tl) crystal, 20.8 cm long and 22.6 cm in diameter. Time-of-flight techniques were used. The gamma-ray spectra were found to be dominated by a few intense primary gamma-ray lines to low-lying levels in agreement with previous observations. Branching ratios are given for the dominating primary lines.

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Radiative capture in nickel and bismuth of neutrons in the MeV region

Cited by 18 publications

References 31 publications

The dosimetry system DS86 and the neutron discrepancy in Hiroshima - historical review, present status, and future options

The dosimetry system DS86 and the neutron discrepancy in Hiroshima - historical review, present status, and future options

Direct and compound contributions to (n, ?) cross sections

Gamma Rays from Neutron Resonance Capture in Mg, Si, P and S

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