TITLE

Accurate determination of high energy gamma-ray standards

AUTHOR(S)
Kessler, E. G.; Dewey, M. S.; Deslattes, R. D.; Henins, A.; Bo¨rner, H. G.; Jentschel, M.; Lehmann, H.
PUB. DATE
July 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 529 Issue 1, p400
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The extension of accurate crystal diffraction spectroscopy to the 2 MeV to 6 MeV region is described. Gamma-ray energy standards with a relative uncertainty of 2×10[sup -7] to 5×10[sup -7] are obtained by measuring the small diffraction angles (a few tenths of a degree) through which the gamma rays are diffracted. Accurate knowledge of the crystal lattice spacing provides a wavelength scale consistent with the definition of the meter. The procedures and the facilities for measuring the small diffraction angles are briefly described. Measurements on gamma rays produced in neutron capture reactions involving H, [sup 32]S, and [sup 35]Cl are used to demonstrate the measurement capability that has been achieved. The relationship between accurate gamma ray and atomic mass measurements is described along with contributions to basic particle properties such as the neutron mass. © 2000 American Institute of Physics.
ACCESSION #
6029988

 

Related Articles

  • Use of n-capture γ-rays for studies in surface and solid state physics. Moreh, R.; Finkelstein, Y.; Shahal, O. // AIP Conference Proceedings;2000, Vol. 529 Issue 1, p408 

    A review of recent studies using the nuclear resonance photon scattering (NRPS) from [sup 15]N occurring in several gases is presented. In particular, new results on the adsorption and molecular orientation of N[sub 2], N[sub 2]O and NO[sub 2] on graphite are given and compared with theoretical...

  • Recent developments in large gamma-ray arrays: A European perspective. Boston, Andrew J. // AIP Conference Proceedings;2000, Vol. 529 Issue 1, p357 

    Large γ-ray arrays were developed primarily for the study of highly excited nuclear states, often at very high values of nuclear angular momentum (spin). The past decade has seen enormous progress in the study of such systems following the development of arrays of Escape-Suppressed...

  • The gamma ray energy tracking array. Vetter, K. // AIP Conference Proceedings;2001, Vol. 576 Issue 1, p583 

    Gamma-ray tracking is a new concept for the detection of γ radiation. One proposed implementation of this concept, called GRETA for Gamma Ray Energy Tracking Array, aims at an improvement in nuclear physics and is based on an array of highly segmented HPGe detectors. We have developed new...

  • GRETA: A new concept for Gamma-Ray Spectroscopy. Vetter, K. // AIP Conference Proceedings;2000, Vol. 529 Issue 1, p364 

    Gamma-ray tracking is a new concept for the detection of γ radiation. One proposed implementation of this concept, called GRETA for Gamma Ray Energy Tracking Array, aims at an improvement in nuclear physics and is based on an array of highly segmented HPGe detectors. We have developed new...

  • Gamma ray spectroscopy with PPM resolving power. Bo¨rner, H. G.; Jentschel, M.; Lehmann, H.; Kessler, E. G. // AIP Conference Proceedings;2000, Vol. 529 Issue 1, p35 

    To obtain the highest possible resolution in a measurement has always been one of the major challenges for experimental physicists because increased resolution generally results in progress–sometimes even unexpected progress. The extraordinary resolving power which is now available for...

  • High-resolution integrated germanium Compton polarimeter for the gamma-ray energy range 80 keV-1... Sareen, R.A.; Urban, W.; Barnett, A.R.; Varley, B.J. // Review of Scientific Instruments;Jun95, Vol. 66 Issue 6, p3653 

    Discusses parameters which govern the choice of a detection system to measure the linear polarization of gamma rays at low energies. Polarimeter design; Noise and radiation considerations; Energy resolution; Efficiency; Key features of the design; Calibrations; Figures of merit; Comparison with...

  • Neutron-induced partial gamma-ray cross-section measurements with GEANIE at LANSCE/WNR. McNabb, D. P.; Becker, J. A.; Archer, D.; Bernstein, L. A.; Drake, D. M.; Garrett, P. E.; Johns, G. D.; McGrath, C. A.; Nelson, R. O.; Stoyer, M. A.; Wilburn, W. S.; Younes, W. // AIP Conference Proceedings;2000, Vol. 529 Issue 1, p384 

    GEANIE is the first large-scale Ge detector array used in conjunction with a high-energy neutron spallation source. GEANIE consists of eleven Compton-suppressed planar detectors, nine suppressed and six unsuppressed co-axial detectors. Spallation neutrons are provided by the LANSCE/WNR facility,...

  • The Amati relation within the fireshell model. Guida, R.; Bernardini, M. G.; Bianco, C. L.; Caito, L.; Dainotti, M. G.; Ruffini, R. // AIP Conference Proceedings;1/3/2008, Vol. 966 Issue 1, p46 

    In this work we show the existence of a spectral-energy correlation within our “fireshell” model for GRBs. The free parameters of the model are the total energy Etote± of the e± plasma and its baryon loading B≡MBc2/Etote±, characterizing the source, and the parameters...

  • Excited states in neutron-rich 188W produced by an 18O-induced 2-neutron transfer reaction. Shizuma, T.; Ishii, T.; Makii, H.; Hayakawa, T.; Shigematsu, S.; Matsuda, M.; Ideguchi, E.; Zheng, Y.; Liu, M.; Morikawa, T.; Walker, P. M.; Oi, M. // European Physical Journal A -- Hadrons & Nuclei;Nov2006, Vol. 30 Issue 2, p391 

    Excited states in neutron-rich 188W have been populated using a 186W(18O,16O) reaction. In-beam γ-rays were measured in coincidence with scattered particles detected by a high-resolution Δ E- E Si telescope. In this experiment, the ground-state band has been identified up to I π = 8+....

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics