Lifetime measurements with the Doppler Shift Attenuation Method using a thick homogeneous production target - Verification of the method
Ertoprak, A., Cederwall, B., Jakobsson, U., Nyako, B. M., Nyberg, J., Davies, P., . . . Xiao, Z. G. (2017). Lifetime measurements with the Doppler Shift Attenuation Method using a thick homogeneous production target - Verification of the method. Acta Physica Polonica B, 48 (3), 325-329. doi:10.5506/APhysPolB.48.325
Julkaistu sarjassaActa Physica Polonica B
Kuti, I. |
Raut, R. |
Ata, A. |
Bäck, T. |
Boso, A. |
Li, H. |
© the Authors 2017. This is an open access article distributed under the terms of a Creative Commons License. Funded by SCOAP3.
Doppler Shift Attenuation Method (DSAM) analysis of excited-state lifetimes normally employs thin production targets mounted on a thick stopper foil (“backing”) serving to slow down and stop the recoiling nuclei of interest in a well-defined manner. Use of a thick, homogeneous production target leads to a more complex analysis as it results in a substantial decrease in the energy of the incident projectile which traverses the target with an associated change in the production cross section of the residues as a function of penetration depth. Here, a DSAM lifetime analysis using a thick homogeneous target has been verified using the Doppler broadened lineshapes of γ rays following the decay of highly excited states in the semi-magic (N = 50) nucleus 94Ru. Lifetimes of excited states in the 94Ru nucleus have been obtained using a modified version of the LINESHAPE package from the Doppler broadened lineshapes resulting from the emission of the γ rays, while the residual nuclei were slowing down in the thick (6 mg/cm2 ) metallic 58Ni target. The results have been validated by comparison with a previous measurement using a different (RDDS) technique. ...