ENERGY SPECTRA OF PHOTONEUTRONS FROM THE REACTIONS O$sup 16$$($$gamma$,n), S$sup 32$$($$gamma$,n) AND Ca$sup 40$$($$gamma$,n)
Journal Article
·
· Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B
The energy spectra ot photoneutrons from the reactions /sup 16/0( gamma ,n), /sup 32/S( gamma ,n), and /sup 40/Ca( gamma ,n) were measured using th e Harwell 33 Mev electron linear accelerator and associated nanosecond neutron time- of-flight spectrometer. The energy resolution is 4 kev for a 1 Mev neutron increasing to 100 kev at 9 Mev. Detailed fine structure is observed throughout the giant dipole resonance regions or the nuclei studied. Measurements are made at several different values of the bremsstrahlung end point in an attempt to establish ground state neutron transitions. Good agreement is found between the present results and-recent (p, gamma /sub 0/) data for the energies and relative widths of levels in /sup 16/O, /sup 32/S, and /sup 40/Ca. Shell-model calculations, including single particle-hole interactions, which predict the energies and strengths of 1/sup -/ states in /sup 16/O do not account for the structure observed in these measurements. A recent suggestion by Boeker, that a 1/sup -/ particle-hole excitation may occur coupled with a 0/sup +/ or 2/sup +/ surface vibration, predicts a splitting of each major particle-hole state; this prediction is more in accord with the observed /sup 16/O data. (auth)
- Research Organization:
- Atomic Energy Research Establishment, Harwell, Berks, Eng.
- NSA Number:
- NSA-18-021257
- OSTI ID:
- 4004114
- Journal Information:
- Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B, Journal Name: Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B Vol. Vol: 52; ISSN NUPHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Journal Article
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Wed Sep 01 00:00:00 EDT 1982
· Phys. Rev. C; (United States)
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OSTI ID:6701344
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Mon Dec 31 23:00:00 EST 1962
· Z. Physik
·
OSTI ID:4706642
THE SPECTRA OF PHOTONEUTRONS FROM THE REACTIONS C$sup 12$($gamma$,n)C$sup 11$ AND O$sup 16$($gamma$,n)O$sup 1$$sup 5$
Journal Article
·
Tue May 01 00:00:00 EDT 1962
· Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys.,
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OSTI ID:4817530
Related Subjects
BREMSSTRAHLUNG
CALCIUM 40
DIPOLES
ELECTRON BEAMS
ENERGY
ENERGY LEVELS
ENERGY RANGE
GAMMA RADIATION
HYPERFINE STRUCTURE
INTERACTIONS
LIFETIME
LINEAR ACCELERATORS
MASS SPECTROMETERS
MEASURED VALUES
MEV RANGE
NEUTRON SPECTROMETERS
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICALS
OSCILLATIONS
OXYGEN 16
PARITY
PARTICLE MODELS
PHOTOPRODUCTION
PHYSICS
RESOLUTION
SHELL MODELS
SPECTRA
SPECTROMETERS
SPIN
SULFUR 32
SURFACES
TIME OF FLIGHT METHOD
TRANSIENTS
VELOCITY
CALCIUM 40
DIPOLES
ELECTRON BEAMS
ENERGY
ENERGY LEVELS
ENERGY RANGE
GAMMA RADIATION
HYPERFINE STRUCTURE
INTERACTIONS
LIFETIME
LINEAR ACCELERATORS
MASS SPECTROMETERS
MEASURED VALUES
MEV RANGE
NEUTRON SPECTROMETERS
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICALS
OSCILLATIONS
OXYGEN 16
PARITY
PARTICLE MODELS
PHOTOPRODUCTION
PHYSICS
RESOLUTION
SHELL MODELS
SPECTRA
SPECTROMETERS
SPIN
SULFUR 32
SURFACES
TIME OF FLIGHT METHOD
TRANSIENTS
VELOCITY