Fermi's golden rule applied to the gamma decay in the quasicontinuum of 46Ti

Abstract

Particle-gamma coincidences from the 46Ti(p,p' gamma)46Ti inelastic scattering reaction with 15-MeV protons are utilized to obtain gamma-ray spectra as a function of excitation energy. The rich data set allows analyzing the coincidence data with various gates on excitation energy. This enables, for many independent data sets, a simultaneous extraction of level density and radiative strength function (RSF). The results are consistent with one common level density. The data seem to exhibit a universal RSF as the deduced RSFs from different excitation energies show only small fluctuations provided that only excitation energies above 3 MeV are taken into account. If transitions to well-separated low-energy levels are included, the deduced RSF may change by a factor of 2-3, which might be expected due to the involved Porter-Thomas fluctuations.

11 pages and 12 figures

References in corpus (4)

• Nuclear level densities and gamma-ray strength functions in 44,45Sc
• Compilation of Giant Electric Dipole Resonances Built on Excited States
• Statistical structure and $\gamma$-decay properties of closed shell Pb nuclei
• Extraction of thermal and electromagnetic properties in 45Ti

Cited by in corpus (6)

• Analysis of possible systematic errors in the Oslo method
• Influence of complete energy sorting on the characteristics of the odd-even effect in fission-fragment element distributions
• Nuclear level densities and $\gamma$-ray strength functions in ${}^{120,124}$Sn isotopes: impact of Porter-Thomas fluctuations
• Unfolding of sparse high-energy $\gamma$-ray spectra from LaBr${}_3$:Ce detectors
• The onset time of Fermi's golden rule
• Emergence of Fermi's Golden Rule in the Probing of a Quantum Many-Body System