Principles of resonance-averaged gamma-ray spectroscopy

Conference · Thu Jan 01 00:00:00 EST 1981

OSTI ID:5967196

Chrien, R E

The unambiguous determination of excitation energies, spins, parities, and other properties of nuclear levels is the paramount goal of the nuclear spectroscopist. All developments of nuclear models depend upon the availability of a reliable data base on which to build. In this regard, slow neutron capture gamma-ray spectroscopy has proved to be a valuable tool. The observation of primary radiative transitions connecting initial and final states can provide definite level positions. In particular the use of the resonance-averaged capture technique has received much recent attention because of the claims advanced for this technique (Chrien 1980a, Casten 1980); that it is able to identify all states in a given spin-parity range and to provide definite spin parity information for these states. In view of the importance of this method, it is perhaps surprising that until now no firm analytical basis has been provided which delineates its capabilities and limitations. Such an analysis is necessary to establish the spin-parity assignments derived from this method on a quantitative basis; in other words a quantitative statement of the limits of error must be provided. It is the principal aim of the present paper to present such an analysis. To do this, a historical description of the technique and its applications is presented and the principles of the method are stated. Finally a method of statistical analysis is described, and the results are applied to recent measurements carried out at the filtered beam facilities at the Brookhaven National Laboratory.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5967196
• Report Number(s): BNL-30177; CONF-810920-17; ON: DE82002248; TRN: 82-001230
• Resource Relation: Conference: 4. international symposium on neutron-capture gamma-ray spectroscopy and related topics, Grenoble, France, 7 Sep 1981
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ENERGY-LEVEL TRANSITIONS
GAMMA SPECTROSCOPY
NUCLEI
ENERGY LEVELS
CAPTURE
NEUTRON REACTIONS
PAIR SPECTROMETERS
PARITY
RESONANCE
SLOW NEUTRONS
SPIN
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
ELEMENTARY PARTICLES
FERMIONS
GAMMA SPECTROMETERS
HADRON REACTIONS
HADRONS
MEASURING INSTRUMENTS
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
PARTICLE PROPERTIES
SPECTROMETERS
SPECTROSCOPY
651100* - Nuclear Physics- Experimental Techniques- (1980-)