MANY-ELECTRON CORRELATIONS IN ATOMIC ELECTRON SHELLS AND POSSIBLE WAYS OF THEIR EXPERIMENTAL DETECTION.
Journal Article
·
· pp 249-69 of Atomic Physics 2. /Sandars, P. G. H. (ed.). London Plenum Press (1971).
OSTI ID:4696526
- Research Organization:
- Ioffe Inst. of Physics and Tech., Leningrad
- NSA Number:
- NSA-26-013202
- OSTI ID:
- 4696526
- Journal Information:
- pp 249-69 of Atomic Physics 2. /Sandars, P. G. H. (ed.). London Plenum Press (1971)., Other Information: From 2. international conference on atomic physics; Oxford, England (21 Jul 1970). Orig. Receipt Date: 31-DEC-72; Bib. Info. Source: UK (United Kingdom (sent to DOE from))
- Country of Publication:
- United Kingdom
- Language:
- English
Similar Records
Most theoretical approaches used in nuclear astrophysics to model the nucleosynthesis of heavy elements incorporate the so-called statistical model in order to describe the excitation and decay properties of atomic nuclei. One of the basic assumptions of this model is the validity of the Brink–Axel hypothesis and the related concept of so-called photon strength functions to describe γ-ray transition probabilities. We present a novel experimental approach that allows for the first time to experimentally determine the photon strength function simultaneously in two independent ways by a unique combination of quasi-monochromatic photon beams and a newly implemented γ–γ coincidence setup. This technique does not assume a priori the validity of the Brink–Axel hypothesis and sets a benchmark in terms of the detection sensitivity for measuring decay properties of photo-excited states below the neutron separation energy. The data for the spherical off-shell nucleus 128Te were obtained for γ-ray beam-energy settings between 3 MeV and 9 MeV in steps of 130 keV for the lower beam energies and in steps of up to 280 keV for the highest beam settings. We present a quantitative analysis on the consistency of the derived photon strength function with the Brink–Axel hypothesis. The data clearly demonstrate a discrepancy of up to a factor of two between the photon strength functions extracted from the photoabsorption and photon emission process, respectively. In addition, we observe that the photon strength functions are not independent of the excitation energy, as usually assumed. Thus, we conclude, that the Brink–Axel hypothesis is not strictly fulfilled in the excitation-energy region below the neutron separation threshold (Sn = 8.78 MeV) for the studied case of 128Te.
MANY-ELECTRON THEORY OF ATOMS AND MOLECULES. I. SHELLS, ELECTRON PAIRS VS MANY-ELECTRON CORRELATIONS
POSSIBILITY OF OBSERVING MANY-BODY EFFECTS IN ATOMIC ELECTRON SHELLS.
Journal Article
·
Tue Jan 01 00:00:00 EST 2019
· Physics Letters B
·
OSTI ID:4696526
+10 more
MANY-ELECTRON THEORY OF ATOMS AND MOLECULES. I. SHELLS, ELECTRON PAIRS VS MANY-ELECTRON CORRELATIONS
Journal Article
·
Thu Feb 01 00:00:00 EST 1962
· Journal of Chemical Physics (U.S.)
·
OSTI ID:4696526
POSSIBILITY OF OBSERVING MANY-BODY EFFECTS IN ATOMIC ELECTRON SHELLS.
Journal Article
·
Sun Jan 01 00:00:00 EST 1967
· Phys. Lett., 24A: 394-6(Mar. 27, 1967).
·
OSTI ID:4696526
+2 more
Related Subjects
N32250* -Physics-Atomic & Molecular Physics-Atomic Theory
N32240 -Physics-Atomic & Molecular Physics-Collision Phenomena
ABSORPTION
ATOMS
AUGER EFFECT
CORRELATION ENERGY
COULOMB FIELD
ELECTRIC POTENTIAL
HARTREE-FOCK METHOD
INELASTIC SCATTERING
MANY BODY PROBLEM
ORBITS
OSCILLATOR STRENGTH
PHOTOIONIZATION
POLARIZATION
RARE GASES
RESIDUAL INTERACTION
SCHROEDINGER EQUATION
SELF-CONSISTENT FIELD
PHOTONS/reactions with rare gases
(T)
ELECTRONS/ scattering by rare gases
inelastic
(T)
ATOMS/electron correlation in
RARE GASES/photon reactions with
(T)
RARE GASES/electron inelastic scattering by
(T)
N32240 -Physics-Atomic & Molecular Physics-Collision Phenomena
ABSORPTION
ATOMS
AUGER EFFECT
CORRELATION ENERGY
COULOMB FIELD
ELECTRIC POTENTIAL
HARTREE-FOCK METHOD
INELASTIC SCATTERING
MANY BODY PROBLEM
ORBITS
OSCILLATOR STRENGTH
PHOTOIONIZATION
POLARIZATION
RARE GASES
RESIDUAL INTERACTION
SCHROEDINGER EQUATION
SELF-CONSISTENT FIELD
PHOTONS/reactions with rare gases
(T)
ELECTRONS/ scattering by rare gases
inelastic
(T)
ATOMS/electron correlation in
RARE GASES/photon reactions with
(T)
RARE GASES/electron inelastic scattering by
(T)