Statistical properties of complex states of /sup 67//sub 30/Zn

Journal Article · Sun Nov 01 00:00:00 EST 1981 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.24.1922· OSTI ID:6108528

Garg, J B; Tikku, V K; Harvey, J A; Macklin, R L; Halperin, J

High resolution neutron total and capture cross section measurements have been made on the separated isotope /sup 66/Zn in the energy range from a few keV to about 1 MeV using the neutron time-of-flight technique and the pulsed Oak Ridge Electron Linear Accelerator. The nominal resolution of the measurements was 0.07 ns/m. The total cross section data have been analyzed up to 380 keV using a multilevel R-matrix formalism and the capture data up to 130 keV using a least squares fit program. From these analyses we have obtained the values of the resonance parameters E/sub 0/, gGAMMA/sub n/, and GAMMA/sub ..gamma../, and values of average quantities: D/sub l/ = 0 = (4.62 +- 0.55) keV, D/sub l/ = 1 = (1.17 +- 0.14) keV, S/sub 0/ = (2.06 +- 0.36), S/sub 1/ = (0.66 +- 0.06), and S/sub 2/ = (0.50 +- 0.12) in units of 10/sup -4/ eV/sup -1/2/. The values of average radiation widths are (0.39 +- 0.06) eV for s-wave resonances and (0.190 +- 0.013) eV for p-wave resonances. The distributions of neutron reduced widths and of level spacings of s- and p-wave resonances show excellent agreement with the Porter-Thomas and Wigner distributions, respectively. The value of the ..delta../sub 3/ statistic for the long range correlation of s-wave energy levels is found to be in reasonable agreement with the theoretical prediction of Dyson and Mehta. A value of 0.59 +- 0.10 has been determined for the linear coefficient for the correlation between the neutron reduced widths and the radiation widths of 26 s-wave resonances. This value is highly significant and has a confidence level of 99.7%.

• Research Organization: State University of New York, Albany, New York 12222
• OSTI ID: 6108528
• Journal Information: Phys. Rev. C; (United States), Vol. 24:5
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NEUTRON REACTIONS
CAPTURE
ZINC 66 TARGET
ZINC 67
ENERGY LEVELS
GAMMA SPECTRA
KEV RANGE
PARITY
R MATRIX
S WAVES
SPIN
STATISTICAL MECHANICS
TIME-OF-FLIGHT METHOD
TOTAL CROSS SECTIONS
ANGULAR MOMENTUM
BARYON REACTIONS
CROSS SECTIONS
ENERGY RANGE
EVEN-ODD NUCLEI
HADRON REACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATRICES
MECHANICS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARTIAL WAVES
PARTICLE PROPERTIES
SPECTRA
STABLE ISOTOPES
TARGETS
ZINC ISOTOPES
651623* - Nuclear Properties & Reactions
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651625 - Nuclear Properties & Reactions
A=59-89
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