New method for the determination of accurate gamma-ray intensities for the 14N(n,{gamma})15N high energy standard

doi:10.1063/1.2187920

Abstract

The 14N(n,{gamma})15N reaction is a primary source of high energy gamma-rays for use in calibration of detectors for other neutron-capture reactions. The gamma ray-intensities of 15N produced by thermal neutron capture and the gamma-ray detection efficiency function have been simultaneously determined from gamma peak areas alone using the basic principle of an intensity balance. A least square fit was made to a new type of intensity balance calculation, combined with traditional efficiency fitting of radioactive sources. This latter ensures the compatibility with low energy efficiencies, while providing an unbiased efficiency function for higher (up to 10 MeV) gamma-ray energies. The calculation is based on the assumption that the 15N decay scheme is complete. From the internal consistency of the resulting intensities, it is believed that they are more accurate than previously published values. The same is true for the derived efficiency function.

New rapid and accurate method to measure low-energy-electron-diffraction beam intensities: the intensities from the clean Pt (111) crystal face

Stair, P.C. ; Kaminska, T.J. ; Kesmodel, L.L. ; ... January 1975 - Phys. Rev., B; (United States)

The intensities of the low-energy-electron-diffraction beams backscattered from the clean platinum (111) surface are measured by a photographic technique. The fluorescent screen in a conventional low-energy-electron-diffraction chamber is photographed at various incident electron energies in electron-volt intervals in the range of 20 to 200 eV. The film is then machine developed and scanned using a computer-controlled digital-output microdensitometer. The intensity profiles of all of the diffraction beams can be obtained simultaneously this way in ten minutes and these are identical to those measured by telephotometer. The film can readily monitor three orders of magnitude change in intensity. The photographic diffraction-beam-intensitymore »« less
DOI: 10.1103/PhysRevB.11.623
A COMPUTER PROGRAMME FOR THE DETERMINATION OF ACCURATE GAMMA RAY LINE INTENSITIES FROM GERMANIUM SPECTRA.

Robinson, D.C. January 1970 - Nucl. Instrum. Methods 78: 120-4(1970).
DOI: 10.1016/0029-554X(70)90436-2
Accurate Wavelength Measurement of High-Energy Gamma Rays from the 35Cl(n,{gamma}) Reactions

Belgya, T. ; Molnar, G.L. ; Mutti, P. ; ... May 2005 - AIP Conference Proceedings

The energies of eight gamma rays in the 36Cl level scheme have been measured with high precision using the 35Cl(n,{gamma}) reaction and the GAMS4 spectrometer. From these energies, a skeleton decay scheme for 36Cl was constructed, and the binding energy of 36Cl was determined to higher precision than previously. It is shown that using this new information, binding energy determination from Ge detector experiments for other nuclei can also be made with higher precision than now available. The measurement of additional weaker 36Cl gamma rays is continuing.
DOI: 10.1063/1.1945193
DETERMINATION OF INTENSITIES AND MULTIPOLARITIES IN HIGH-ENERGY $sup 182$Ta DECAY $gamma$ TRANSITIONS (in Russian)

Vitman, V.D. ; Voinova, N.A. ; Dzhelepov, B.S. September 1965 - Yadern. Fiz.
DETERMINATION OF INTENSITIES AND MULTIPOLARITIES OF HIGH-ENERGY $gamma$- TRANSITIONS ACCOMPANYING THE DECAY OF $sup 182$Ta

Dzelepov, B.S. ; Vitman, V.D. ; Voinova, N.A. January 1965 - Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B

Title: New method for the determination of accurate gamma-ray intensities for the 14N(n,{gamma})15N high energy standard

Abstract

Citation Formats

New rapid and accurate method to measure low-energy-electron-diffraction beam intensities: the intensities from the clean Pt (111) crystal face

A COMPUTER PROGRAMME FOR THE DETERMINATION OF ACCURATE GAMMA RAY LINE INTENSITIES FROM GERMANIUM SPECTRA.

Accurate Wavelength Measurement of High-Energy Gamma Rays from the 35Cl(n,{gamma}) Reactions

DETERMINATION OF INTENSITIES AND MULTIPOLARITIES IN HIGH-ENERGY $sup 182$Ta DECAY $gamma$ TRANSITIONS (in Russian)

DETERMINATION OF INTENSITIES AND MULTIPOLARITIES OF HIGH-ENERGY $gamma$- TRANSITIONS ACCOMPANYING THE DECAY OF $sup 182$Ta