The reaction 23Na(n, γ)24Na studied with unpolarized and polarized thermal neutrons

Tielens, T.A.A.; Kopeckỳ, J.; Abrahams, K.; Endt, P.M.

doi:10.1016/0375-9474(83)90184-7

Cited by 15 publications

(6 citation statements)

References 23 publications

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“…Using data of absolute intensities of decay and prompt γ-rays are taken from [2][3][4][5][6][7][8][9][10][11][12][13][14]. The efficiency was determined from thermal neutron capture γ-rays.…”

Section: Resultsmentioning

confidence: 99%

Reliability of Prompt γ-Ray Intensities for the Measurement of Neutron Capture Cross Sections

Miyazaki

Shimizu²,

Shibata³

et al. 2005

AIP Conference Proceedings

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Articles you may be interested inDetermination of radiative neutron capture cross sections for unstable nuclei by the γ-ray strength function method AIP Conf.Abstract. We examined the reliability of prompt γ-ray intensities by measuring ratios of thermal neutron capture cross sections on 23 Na, 27 Al, 51 V, 55 Mn, 64 Ni, 65 Cu, 141 Pr, 186 W, and 197 Au at the Kyoto University Research Reactor Institute. The cross sections were obtained by two methods: the first is detecting prompt γ-rays (which we call the prompt-γ method), and the other is detecting γ-rays following β-decay (the activation method). Intensities of prompt γ-rays and decay γ-rays have been reported to have an uncertainty of about 5% and 1%, respectively. It is found that values of 65 Cu and 186 W have large discrepancies in the results of the two methods, by about 30%. The disagreement would be caused by inaccuracy of the absolute intensities of prompt γ-rays. The inaccuracy is estimated to be due to the incompleteness of level schemes and the detector efficiency of prompt γ-rays. We need to examine absolute intensities of prompt γ-rays when we use the prompt-γ method.

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Section: Resultsmentioning

confidence: 99%

Reliability of Prompt γ-Ray Intensities for the Measurement of Neutron Capture Cross Sections

Miyazaki

Shimizu²,

Shibata³

et al. 2005

AIP Conference Proceedings

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“…Gilbert, Cameron and Tielens [11,12] calculated the spin cut-o¡ parameter for the Bethe formula with reduced moment of inertia,…”

Section: Fermi-gas Modelmentioning

confidence: 99%

“…The statistical properties of a nucleus is de¢ned in terms of its neutron and proton numbers N and Z and the total energy E. We then extend the above derivation to include a nuclear system. For a nucleus of N neutrons of energies e ðnÞ k with magnetic quantum numbers m ðnÞ k and Z protons of energies e ðpÞ k with magnetic quantum numbers m ðpÞ k , the constants of motion are the neutron and proton numbers given by ( 11) and the total energy E ¼ E p þ E n given by (12).…”

Section: Fermi-gas Modelmentioning

confidence: 99%

Statistical Treatment of Nuclear Level Densities

Behkami

Kargar

2002

Phys. Scr.

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“…• Compton scattering (CS) has been used in the past for circular photon polarimetry below 10 MeV (Tielens et al 1983a-b, Hoyle et al 1983, but deserves attention up to and beyond 100 MeV. Despite a decreasing cross section, a good CS distinction from competing events may nowadays become feasible.…”

Section: Outlook For Efficient Polarimetry At Higher Energiesmentioning

confidence: 99%

Tests of fundamental symmetries with decay

Klinken

1996

J. Phys. G: Nucl. Part. Phys.

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Since the fall of parity in electroweak interactions the discrete transformations of parity, charge conjugation and time reversal are under close scrutiny for any sign of deviation from maximality where symmetry breaking seems to be complete (like P violation in β decay) and for any sign of symmetry breaking when this has not yet been observed (like T violation in β decay).The Standard Model (SM) of electroweak interactions remains robust in explaining the outcome of all experiments with β rays. Bounds set by P-and T-reversal tests are tightening but remain stubbornly within the SM. However, the solar-neutrino issue enters the era beyond the SM by requiring ν oscillations and a non-zero ν mass. This review emphasizes experiments with β rays, but includes solar-neutrino and ββ-decay findings and devotes some attention to the broken symmetry in biochirality.Theoretical descriptions attempt to implement the symmetry breaking in a causal way, pointing to a possible earlier manifest left-right symmetry, and stimulating searches for deviations from the above maximality as a 'fossil' remnant of symmetry at a deeper level. Topical review 6.2 Neutrino masses searched for in β-ray spectra 1263 6.3 ββ decay 1263 6.4 Solar neutrinos 1265 6.5 ν-oscillation sites 1267 6.6 ν oscillations in vacuum and in dense solar matter 1268 7 Bounds on right-handed V + A currents 1270 7.1 Bounds on the mass of the W 2 boson obtained with β decay 1270 7.2 Bounds from other sources: astrophysics, non-leptonic decays 1272 7.3 Universality of lepton interaction and CKM unitarity 1273 8 Testing PCT invariance and searching for T violation 1274 8.1 PC violation in kaon decay 1274 8.2 Tests of T symmetry with triple correlations in nuclear β decay 1275 8.3 Constraints on T violation by β decay 1277 8.4 Decay of RaE and T asymmetry 1278 9 β decay: an unlikely cause of biological chirality 1279 10 Epilogue 1281 References 1282

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The reaction 23Na(n, γ)24Na studied with unpolarized and polarized thermal neutrons

Cited by 15 publications

References 23 publications

Reliability of Prompt γ-Ray Intensities for the Measurement of Neutron Capture Cross Sections

Reliability of Prompt γ-Ray Intensities for the Measurement of Neutron Capture Cross Sections

Statistical Treatment of Nuclear Level Densities

Tests of fundamental symmetries with decay

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