Is the K-quantum number conserved in the order-to-chaos transittion region?

TY - JOUR

T1 - Is the K-quantum number conserved in the order-to-chaos transittion region?

AU - Benzoni...[et al.], G.

AU - Døssing, T.

AU - Herskind, B.

AU - Hagemann, Gudrun Bertram

PY - 2005

Y1 - 2005

N2 - To study the order-to-chaos transition in nuclei we investigate the validity of the K-quantum number in the excited rapidly rotating 163Er nucleus, analyzing the variance and covariance of the spectrum fluctuations of ¿-cascades feeding into low-K and high-K bands. The data are compared to simulated spectra obtained using a microscopic cranked shell model. K-selection rules are found to be obeyed for decay along excited unresolved rotational bands of internal excitation energy up to around 1.2 MeV and angular momenta 20I40. At higher internal energy, from about 1.2 to 2.5 MeV, the selection rules are found to be only partially valid.

AB - To study the order-to-chaos transition in nuclei we investigate the validity of the K-quantum number in the excited rapidly rotating 163Er nucleus, analyzing the variance and covariance of the spectrum fluctuations of ¿-cascades feeding into low-K and high-K bands. The data are compared to simulated spectra obtained using a microscopic cranked shell model. K-selection rules are found to be obeyed for decay along excited unresolved rotational bands of internal excitation energy up to around 1.2 MeV and angular momenta 20I40. At higher internal energy, from about 1.2 to 2.5 MeV, the selection rules are found to be only partially valid.

U2 - 10.1016/j.physletb.2004.12.083

DO - 10.1016/j.physletb.2004.12.083

M3 - Journal article

SN - 0370-2693

VL - 615

SP - 160

EP - 163

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

IS - 3-4

ER -