Lifetime measurement of excited low-spin states via the $(p,p^{\prime }\gamma$) reaction

Abstract

In this article a method for lifetime measurements in the sub-picosecond regime via the Doppler-shift attenuation method (DSAM) following the inelastic proton scattering reaction is presented. In a pioneering experiment we extracted the lifetimes of 30 excited low-spin states of ${}^{96}$Ru, taking advantage of the coincident detection of scattered protons and de-exciting $\gamma$-rays as well as the large number of particle and $\gamma$-ray detectors provided by the SONIC@HORUS setup at the University of Cologne. The large amount of new experimental data shows that this technique is suited for the measurement of lifetimes of excited low-spin states, especially for isotopes with a low isotopic abundance, where $(n,n^{\prime }\gamma$) or - in case of investigating dipole excitations - ($\gamma ,{\gamma }^{\prime }$) experiments are not feasible due to the lack of sufficient isotopically enriched target material.

References in corpus (2)

• The gamma-ray spectrometer HORUS and its applications for nuclear astrophysics
• Mixed-symmetry octupole and hexadecapole excitations in the N=52 isotones

Cited by in corpus (6)

• Shape coexisistence and collective low-spin states in ${}^{112,114}$Sn studied with the $(p,p^{\prime }\gamma )$ DSA coincidence technique
• Fine structure of the pygmy quadrupole resonance in ${}^{112,114}$Sn isotopes
• The decay of quadrupole-octupole $1^{-}$ states in ${}^{40}$Ca and ${}^{140}$Ce
• Combining γ-ray and particle spectroscopy with SONIC@HORUS
• Experimental techniques to study the $\gamma$ process for nuclear astrophysics at the Cologne accelerator laboratory
• Efficient determination of HPGe γ-ray efficiencies at high energies with ready-to-use simulation software